Search

Your search keyword '"Flannery D"' showing total 476 results
Start Over Author "Flannery D"
476 results on '"Flannery D"'

1. Zariski density and computing with $S$-integral groups

Author

Detinko, A. S., Flannery, D. L., and Hulpke, A.

Subjects
Mathematics - Group Theory, 20-04, 20G15, 20H25, 68W30
Abstract

We generalize our methodology for computing with Zariski dense subgroups of $\mathrm{SL}(n, \mathbb{Z})$ and $\mathrm{Sp}(n, \mathbb{Z})$, to accommodate input dense subgroups $H$ of $\mathrm{SL}(n, \mathbb{Q})$ and $\mathrm{Sp}(n, \mathbb{Q})$. A key task, backgrounded by the Strong Approximation theorem, is computing a minimal congruence overgroup of $H$. Once we have this overgroup, we may describe all congruence quotients of $H$. The case $n=2$ receives particular attention.

Published
2023

3. Freeness and $S$-arithmeticity of rational M\'{o}bius groups

Author

Detinko, A. S., Flannery, D. L., and Hulpke, A.

Subjects
Mathematics - Group Theory, 20-04, 20G15, 20H25, 68W30
Abstract

We initiate a new, computational approach to a classical problem: certifying non-freeness of ($2$-generator, parabolic) M\"{o}bius subgroups of $\mathrm{SL}(2,\mathbb{Q})$. The main tools used are algorithms for Zariski dense groups and algorithms to compute a presentation of $\mathrm{SL}(2, R)$ for a localization $R= \mathbb{Z}[\frac{1}{b}]$ of $\mathbb{Z}$. We prove that a M\"{o}bius subgroup $G$ is not free by showing that it has finite index in the relevant $\mathrm{SL}(2, R)$. Further information about the structure of $G$ is obtained; for example, we compute the minimal subgroup of finite index in $\mathrm{SL}(2,R)$ that contains $G$.

Published
2022

4. Classifying finite monomial linear groups of prime degree in characteristic zero

Author

Bácskai, Z., Flannery, D. L., and O'Brien, E. A.

Subjects
Mathematics - Group Theory, 20H20, 20E99, 20-04
Abstract

Let $p$ be a prime and let $\mathbb{C}$ be the complex field. We explicitly classify the finite solvable irreducible monomial subgroups of $\mathrm{GL}(p,\mathbb{C})$ up to conjugacy. That is, we give a complete and irredundant list of $\mathrm{GL}(p,\mathbb{C})$-conjugacy class representatives as generating sets of monomial matrices. Copious structural information about non-solvable finite irreducible monomial subgroups of $\mathrm{GL}(p,\mathbb{C})$ is also proved, enabling a classification of all such groups bar one family. We explain the obstacles in that exceptional case. For $p\leq 3$, we classify all finite irreducible subgroups of $\mathrm{GL}(p,\mathbb{C})$. Our classifications are available publicly in Magma.

Published
2021

5. Locally nilpotent linear groups

Author

Detinko, A. S. and Flannery, D. L.

Subjects
Mathematics - Group Theory, Primary 20F19, Secondary 20H20
Abstract

We survey aspects of locally nilpotent linear groups. Then we obtain a new classification; namely, we classify the irreducible maximal locally nilpotent subgroups of $\mathrm{GL}(q, \mathbb F)$ for prime $q$ and any field $\mathbb F$.

Published
2021

6. Almost supplementary difference sets and quaternary sequences

Author

Armario, J. A. and Flannery, D. L.

Subjects
Mathematics - Combinatorics
Abstract

We introduce almost supplementary difference sets (ASDS). For odd $m$, certain ASDS in ${\mathbb Z}_m$ that have amicable incidence matrices are equivalent to quaternary sequences of odd length $m$ with optimal autocorrelation. As one consequence, if $2m-1$ is a prime power, or $m \equiv 1 \mod 4$ is prime, then ASDS of this kind exist. We also explore connections to optimal binary sequences and group cohomology.

Published
2019

7. Algorithms for computing with nilpotent matrix groups over infinite domains

Author

Detinko, A. S. and Flannery, D. L.

Subjects
Mathematics - Group Theory
Abstract

We develop methods for computing with matrix groups defined over a range of infinite domains, and apply those methods to the design of algorithms for nilpotent groups. In particular, we provide a practical algorithm to test nilpotency of matrix groups over an infinite field. We also provide algorithms that answer a number of structural questions for a given nilpotent matrix group. The algorithms have been implemented in GAP and MAGMA.

Published
2019

8. Algorithms for arithmetic groups with the congruence subgroup property

Author

Detinko, A. S., Flannery, D. L., and Hulpke, A.

Subjects
Mathematics - Group Theory
Abstract

We develop practical techniques to compute with arithmetic groups $H\leq \mathrm{SL}(n,\mathbb{Q})$ for $n>2$. Our approach relies on constructing a principal congruence subgroup in $H$. Problems solved include testing membership in $H$, analyzing the subnormal structure of $H$, and the orbit-stabilizer problem for $H$. Effective computation with subgroups of $\mathrm{GL}(n,\mathbb{Z}_m)$ is vital to this work. All algorithms have been implemented in GAP.

Published
2019

9. Deciding finiteness of matrix groups in positive characteristic

Author

Detinko, A. S., Flannery, D. L., and O'Brien, E. A.

Subjects
Mathematics - Group Theory
Abstract

We present a new algorithm to decide finiteness of matrix groups defined over a field of positive characteristic. Together with previous work for groups in zero characteristic, this provides the first complete solution of the finiteness problem for finitely generated matrix groups over an arbitrary field. We also give an algorithm to compute the order of a finite matrix group over a function field of positive characteristic. Our MAGMA implementations of these algorithms are publicly available.

Published
2019

10. Algorithms for the Tits alternative and related problems

Author

Detinko, A. S., Flannery, D. L., and O'Brien, E. A.

Subjects
Mathematics - Group Theory
Abstract

We present an algorithm that decides whether a finitely generated linear group over an infinite field is solvable-by-finite: a computationally effective version of the Tits alternative. We also give algorithms to decide whether the group is nilpotent-by-finite, abelian-by-finite, or central-by-finite. Our algorithms have been implemented in MAGMA and are publicly available.

Published
2019

11. Recognizing finite matrix groups over infinite fields

Author

Detinko, A. S., Flannery, D. L., and O'Brien, E. A.

Subjects
Mathematics - Group Theory
Abstract

We present a uniform methodology for computing with finitely generated matrix groups over any infinite field. As one application, we completely solve the problem of deciding finiteness in this class of groups. We also present an algorithm that, given such a finite group as input, in practice successfully constructs an isomorphic copy over a finite field, and uses this copy to investigate the group's structure. Implementations of our algorithms are available in MAGMA.

Published
2019

12. Algorithms for linear groups of finite rank

Author

Detinko, A. S., Flannery, D. L., and O'Brien, E. A.

Subjects
Mathematics - Group Theory
Abstract

Let $G$ be a finitely generated solvable-by-finite linear group. We present an algorithm to compute the torsion-free rank of $G$ and a bound on the Pr\"{u}fer rank of $G$. This yields in turn an algorithm to decide whether a finitely generated subgroup of $G$ has finite index. The algorithms are implemented in MAGMA for groups over algebraic number fields.

Published
2019

13. Integrality and arithmeticity of solvable linear groups

Author

de Graaf, W. A., Detinko, A. S., and Flannery, D. L.

Subjects
Mathematics - Group Theory, Computer Science - Symbolic Computation, 20-04, 20G15, 20H25, 68W30
Abstract

We develop a practical algorithm to decide whether a finitely generated subgroup of a solvable algebraic group $G$ is arithmetic. This incorporates a procedure to compute a generating set of an arithmetic subgroup of $G$. We also provide a simple new algorithm for integrality testing of finitely generated solvable-by-finite linear groups over the rational field. The algorithms have been implemented in {\sc Magma}.

Published
2019

14. Experimenting with symplectic hypergeometric monodromy groups

Author

Detinko, A. S., Flannery, D. L., and Hulpke, A.

Subjects
Mathematics - Group Theory, 20-04, 20G15, 20H25, 68W30
Abstract

We present new computational results for symplectic monodromy groups of hypergeometric differential equations. In particular, we compute the arithmetic closure of each group, sometimes justifying arithmeticity. The results are obtained by extending our previous algorithms for Zariski dense groups, based on the strong approximation and congruence subgroup properties.

Published
2019
Full Text
View/download PDF

15. On quasi-orthogonal cocycles

Author

Armario, J. A. and Flannery, D. L.

Subjects
Mathematics - Combinatorics
Abstract

We introduce the notion of quasi-orthogonal cocycle. This is motivated in part by the maximal determinant problem for square $\{\pm 1\}$-matrices of size congruent to $2$ modulo $4$. Quasi-orthogonal cocycles are analogous to the orthogonal cocycles of algebraic design theory. Equivalences with new and known combinatorial objects afforded by this analogy, such as quasi-Hadamard groups, relative quasi-difference sets, and certain partially balanced incomplete block designs, are proved.

Published
2019
Full Text
View/download PDF

16. Generalized binary arrays from quasi-orthogonal cocycles

Author

Armario, J. A. and Flannery, D. L.

Subjects
Mathematics - Combinatorics
Abstract

Generalized perfect binary arrays (GPBAs) were used by Jedwab to construct perfect binary arrays. A non-trivial GPBA can exist only if its energy is $2$ or a multiple of $4$. This paper introduces generalized optimal binary arrays (GOBAs) with even energy not divisible by $4$, as analogs of GPBAs. We give a procedure to construct GOBAs based on a characterization of the arrays in terms of $2$-cocycles. As a further application, we determine negaperiodic Golay pairs arising from generalized optimal binary sequences of small length.

Published
2019
Full Text
View/download PDF

17. L.G. Kov\'acs and linear groups

Author

Detinko, A. S. and Flannery, D. L.

Subjects
Mathematics - Group Theory, 20H20, 20E45, 20E99
Abstract

We survey the legacy of L.G. Kov\'acs in linear group theory, with a particular focus on classification questions.

Published
2018
Full Text
View/download PDF

18. Practical computation with linear groups over infinite domains

Author

Detinko, A. and Flannery, D.

Subjects
Mathematics - Group Theory, 20G15, 20H20, 68W30
Abstract

We survey recent progress in computing with finitely generated linear groups over infinite fields, describing the mathematical background of a methodology applied to design practical algorithms for these groups. Implementations of the algorithms have been used to perform extensive computer experiments.

Published
2018

19. Linear groups and computation

Author

Detinko, A. S. and Flannery, D. L.

Subjects
Mathematics - Group Theory, 20G15, 20H20, 68W30
Abstract

We present an exposition of our ongoing project in a new area of applicable mathematics: practical computation with finitely generated linear groups over infinite fields. Methodology and algorithms available for practical computation in this class of groups are surveyed. We illustrate the solution of hard mathematical problems by computer experimentation. Possible avenues for further progress are discussed. This article is aimed at a broad mathematical audience, and more particularly at users of group-theoretical methods and computer algebra systems.

Published
2018
Full Text
View/download PDF

20. Episodic Seafloor Hydrothermal Alteration as a Source of Stable Remagnetizations in Archean Volcanic Rocks.

Author

Brenner, A. R., Fu, R. R., Brown, A. J., Hodgin, E. B., Flannery, D. T., and Schmitz, Mark D.

Subjects
GEOLOGICAL time scales, GEOMAGNETISM, HYDROTHERMAL alteration, RECRYSTALLIZATION (Geology), REMANENCE, MAGNETITE
Abstract

Interpreting the paleomagnetic records of altered rocks, especially those from Earth's earliest history, is complicated by metamorphic overprints and recrystallization of ferromagnetic minerals. However, these records may be as valuable as a primary signal if the timing and mechanism of alteration‐related remagnetizations can be ascertained. We illustrate the success of this approach in the case of seafloor hydrothermal alteration by integrating simple rock magnetic and magnetic microscopy data with petrography, hyperspectral imagery, aeromagnetic surveys, field mapping, and geochronology of Paleoarchean basalts from North Pole Dome located in the East Pilbara Craton, Western Australia. We identify 12 hydrothermal episodes during the deposition of the stratigraphy between ∼3490 and 3350 Ma. These episodes produced stratabound zones of hydrothermal alteration with predictable facies successions of mineral assemblages reflecting sub‐seafloor gradients in fluid temperature, pH, composition, and water/rock ratios. Rock magnetic data and magnetic microscopy pinpoint the secondary ferromagnetic minerals within each alteration assemblage, revealing a specific single‐domain magnetite population within leucoxenes (titanite and anatase after primary titanomagnetites) that always accompanies low‐water/rock alteration in fluids buffered to pH equilibrium with the host basalts. Highly uniform magnetic properties indicate that once formed, these magnetites remain unchanged upon further exposure to rock buffered fluids, stabilizing them against later alteration events and making them durable paleofield recorders. The altered basalts hosting this magnetite have unique and consistent appearances, mineralogy, IR absorption features, aeromagnetic signatures, and magnetic properties across all hydrothermal systems studied here, highlighting how integrating these data sets can identify and interpret this alteration style in future paleomagnetic investigations. Plain Language Summary: Paleomagnetists interpret the magnetic signals preserved in rocks to understand plate tectonics and the Earth's magnetic field in the deep past. However, rocks can get altered via heat, pressure, or chemical reactions, which also alter these magnetic signals. The aim of this study is to demonstrate that one type of alteration—chemical alteration of rocks as they marinate in circulating hot water within seafloor hydrothermal systems—modifies the magnetic signals of rocks in order to use them for future paleomagnetic studies. Using airborne infrared imaging, magnetic field mapping, field observations, and radiometric dating, we demonstrate that an area of Western Australia called North Pole Dome experienced a dozen seafloor hydrothermal alteration events over 3 billion years ago. We then use magnetic measurements and mineralogical observations to document how these hydrothermal systems altered the magnetic signals in their host rocks. These analyses reveal a recognizable population of altered rocks that can preserve paleomagnetic signals related to hydrothermal alteration. This is because the alteration results in the growth of very fine‐grained magnetite with all the necessary characteristics to reliably and durably hold onto magnetic signals over geologic time. Key Points: Field mapping, remote sensing, and petrographic data identify 12 seafloor hydrothermal episodes in an Archean volcanic successionMagnetic and mineralogical characteristics of the basalts predictably co‐vary with alteration facies across all hydrothermal systemsWe establish a geologic, chronological, and petrographic framework for identifying seafloor hydrothermal remagnetization in basalts [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

22. Sedimentology and Stratigraphy of the Shenandoah Formation, Western Fan, Jezero Crater, Mars

Author

Stack, K. M., Ives, L. R. W., Gupta, S., Lamb, M. P., Tebolt, M., Caravaca, G., Grotzinger, J. P., Russell, P., Shuster, D. L., Williams, A. J., Amundsen, H., Alwmark, S., Annex, A. M., Barnes, R., Bell, J., Beyssac, O., Bosak, T., Crumpler, L. S., Dehouck, E., Gwizd, S. J., Hickman-Lewis, K., Horgan, B. H. N., Hurowitz, J., Kalucha, H., Kanine, O., Lesh, C., Maki, J., Mangold, N., Randazzo, N., Seeger, C., Williams, R. M. E., Brown, A., Cardarelli, E., Dypvik, H., Flannery, D., Frydenvang, J., Hamran, S.-E., Núñez, J. I., Paige, D., Simon, J. I., Tice, M., Tate, C., Wiens, R. C., Stack, K. M., Ives, L. R. W., Gupta, S., Lamb, M. P., Tebolt, M., Caravaca, G., Grotzinger, J. P., Russell, P., Shuster, D. L., Williams, A. J., Amundsen, H., Alwmark, S., Annex, A. M., Barnes, R., Bell, J., Beyssac, O., Bosak, T., Crumpler, L. S., Dehouck, E., Gwizd, S. J., Hickman-Lewis, K., Horgan, B. H. N., Hurowitz, J., Kalucha, H., Kanine, O., Lesh, C., Maki, J., Mangold, N., Randazzo, N., Seeger, C., Williams, R. M. E., Brown, A., Cardarelli, E., Dypvik, H., Flannery, D., Frydenvang, J., Hamran, S.-E., Núñez, J. I., Paige, D., Simon, J. I., Tice, M., Tate, C., and Wiens, R. C.

Abstract

Sedimentary fans are key targets of exploration on Mars because they record the history of surface aqueous activity and habitability. The sedimentary fan extending from the Neretva Vallis breach of Jezero crater's western rim is one of the Mars 2020 Perseverance rover's main exploration targets. Perseverance spent ∼250 sols exploring and collecting seven rock cores from the lower ∼25 m of sedimentary rock exposed within the fan's eastern scarp, a sequence informally named the “Shenandoah” formation. This study describes the sedimentology and stratigraphy of the Shenandoah formation at two areas, “Cape Nukshak” and “Hawksbill Gap,” including a characterization, interpretation, and depositional framework for the facies that comprise it. The five main facies of the Shenandoah formation include: laminated mudstone, laminated sandstone, low-angle cross stratified sandstone, thin-bedded granule sandstone, and thick-bedded granule-pebble sandstone and conglomerate. These facies are organized into three facies associations (FA): FA1, comprised of laminated and soft sediment-deformed sandstone interbedded with broad, unconfined coarser-grained granule and pebbly sandstone intervals; FA2, comprised predominantly of laterally extensive, soft-sediment deformed laminated, sulfate-bearing mudstone with lenses of low-angle cross-stratified and scoured sandstone; and FA3, comprised of dipping planar, thin-bedded sand-gravel couplets. The depositional model favored for the Shenandoah formation involves the transition from a sand-dominated distal alluvial fan setting (FA1) to a stable, widespread saline lake (FA2), followed by the progradation of a river delta system (FA3) into the lake basin. This sequence records the initiation of a relatively long-lived, habitable lacustrine and deltaic environment within Jezero crater.

Published
2024

24. Sedimentology and Stratigraphy of the Shenandoah Formation, Western Fan, Jezero Crater, Mars

Author

Stack, K. M., primary, Ives, L. R. W., additional, Gupta, S., additional, Lamb, M. P., additional, Tebolt, M., additional, Caravaca, G., additional, Grotzinger, J. P., additional, Russell, P., additional, Shuster, D. L., additional, Williams, A. J., additional, Amundsen, H., additional, Alwmark, S., additional, Annex, A. M., additional, Barnes, R., additional, Bell, J., additional, Beyssac, O., additional, Bosak, T., additional, Crumpler, L. S., additional, Dehouck, E., additional, Gwizd, S. J., additional, Hickman‐Lewis, K., additional, Horgan, B. H. N., additional, Hurowitz, J., additional, Kalucha, H., additional, Kanine, O., additional, Lesh, C., additional, Maki, J., additional, Mangold, N., additional, Randazzo, N., additional, Seeger, C., additional, Williams, R. M. E., additional, Brown, A., additional, Cardarelli, E., additional, Dypvik, H., additional, Flannery, D., additional, Frydenvang, J., additional, Hamran, S.‐E., additional, Núñez, J. I., additional, Paige, D., additional, Simon, J. I., additional, Tice, M., additional, Tate, C., additional, and Wiens, R. C., additional

Published
2024
Full Text
View/download PDF

27. The application of the NeXus data format to ISIS muon data

Author

Cottrell, S. P., Flannery, D., Porter, G., Hillier, A. D., and King, P. J. C.

Subjects
Condensed Matter
Abstract

Although originally designed by and for the use of the Neutron and X-ray communities, the flexibility of the NeXus data format makes it equally suitable for storing data gathered from MuSR experiments. Furthermore, its use should open up the possibility of sharing software beyond the immediate muon community; giving access to the many tools that are already in existence for manipulating NeXus and HDF based files. This paper explores the development of the NeXus format for storing ISIS muon data and the associated experimental conditions. The design of an Instrument Definition for the ISIS muon instruments is described and the implementation of an application to translate the present ISIS raw data format to the NeXus format presented. The development of a common muon data format is a topic of active discussion within the muon community; with this in mind, the suitability of NeXus and, in particular, the ISIS Instrument Definition for general application is considered. A number of applications that have been developed to exploit the flexibility of the ISIS muon NeXus file format are described and a scheme for enabling web based browsing and analysis of experiment data is introduced., Comment: "Paper for NOBUGS2002 Conference, NIST, Gaithersburg, MD. Poster submission. NOBUGS abstract identifier: NOBUGS2002/028 10 pages, Postscript, PDF file available at http://www.isis.rl.ac.uk/NOBUGS2002/ "

Published
2002

28. In Situ Geologic Context Mapping Transect on the Floor of Jezero Crater From Mars 2020 Perseverance Rover Observations

Author

Crumpler, L. S., primary, Horgan, B. H. N., additional, Simon, J. I., additional, Stack, K. M., additional, Alwmark, S., additional, Dromart, G., additional, Wiens, R. C., additional, Udry, A., additional, Brown, A. J., additional, Russell, P., additional, Amundson, H. E. F., additional, Hamran, S.‐E., additional, Bell, J., additional, Shuster, D., additional, Calef, F. J., additional, Núñez, J., additional, Cohen, B. A., additional, Flannery, D., additional, Herd, C. D. K., additional, Hand, K. P., additional, Maki, J. N., additional, Schmidt, M., additional, Golombek, M. P., additional, and Williams, N. R., additional

Published
2023
Full Text
View/download PDF

29. Trends and Impact of Door-to-Balloon Time on Clinical Outcomes in Patients Aged

Author

Duffy, SJ, Shaw, JA, Walton, A, Dart, A, Broughton, A, Federman, J, Keighley, C, Hengel, C, Peter, KH, Stub, D, Chan, W, O'Brien, J, Selkrig, L, Rankin, K, Vandernet, R, Huntington, R, Pally, S, Clark, DJ, Farouque, O, Horrigan, M, Johns, J, Oliver, L, Brennan, J, Chan, R, Proimos, G, Dortimer, T, Chan, B, Nadurata, V, Huq, R, Fernando, D, Al-Fiadh, A, Yudi, M, Sugumar, H, Ramchand, J, Han, H, Picardo, S, Brown, L, Oqueli, E, Sharma, A, Zhu, B, Ryan, N, Harrison, T, New, G, Roberts, L, Freeman, M, Rowe, M, Cheong, Y, Goods, C, Teh, A, Parfrey, S, Ramzy, J, Koshy, A, Venkataraman, P, Flannery, D, Hiew, C, Sebastian, M, Yip, T, Mok, M, Jaworski, C, Hutchinson, A, Cimenkaya, C, Ngu, P, Khialani, B, Salehi, H, Turner, M, Dyson, J, McDonald, B, Van Den Nouwelant, D, Halliburton, K, Krum, H, Reid, C, Andrianopoulos, N, Brennan, AL, Chand, V, Dinh, D, Yan, BP, Ajani, AE, Warren, R, Eccleston, D, Lefkovits, J, Iyer, R, Gurvitch, R, Wilson, W, Brooks, M, Biswas, S, Yeoh, J, Yudi, Matias B., Hamilton, Garry, Farouque, Omar, Andrianopoulos, Nick, Duffy, Stephen J., Lefkovits, Jeffrey, Brennan, Angela, Fernando, Dharsh, Hiew, Chin, Freeman, Melanie, Reid, Christopher M., Dakis, Robynne, Ajani, Andrew E., and Clark, David J.

Published
2017
Full Text
View/download PDF

32. In situ energy-dispersive X-ray diffraction microscopy with the Planetary Instrument for X-ray Lithochemistry (PIXL) on Mars

Author

Jones, M. W. M., primary, Flannery, D. T., additional, Allwood, A. C., additional, Tice, M. M., additional, Hurowitz, J. A., additional, Liu, Y., additional, Orenstein, B. J., additional, Davidoff, S., additional, Tosca, N. J., additional, Moore, K. R., additional, Clark, B. C., additional, Van Bommel, S. J., additional, Schmidt, M. E., additional, Kizovski, T. V., additional, Treiman, A. H., additional, and O'Neil, L, additional

Published
2023
Full Text
View/download PDF

33. Samples Collected From the Floor of Jezero Crater With the Mars 2020 Perseverance Rover

Author

Simon, J. I., primary, Hickman‐Lewis, K., additional, Cohen, B. A., additional, Mayhew, L. E., additional, Shuster, D. L., additional, Debaille, V., additional, Hausrath, E. M., additional, Weiss, B. P., additional, Bosak, T., additional, Zorzano, M.‐P., additional, Amundsen, H. E. F., additional, Beegle, L. W., additional, Bell, J. F., additional, Benison, K. C., additional, Berger, E. L., additional, Beyssac, O., additional, Brown, A. J., additional, Calef, F., additional, Casademont, T. M., additional, Clark, B., additional, Clavé, E., additional, Crumpler, L., additional, Czaja, A. D., additional, Fairén, A. G., additional, Farley, K. A., additional, Flannery, D. T., additional, Fornaro, T., additional, Forni, O., additional, Gómez, F., additional, Goreva, Y., additional, Gorin, A., additional, Hand, K. P., additional, Hamran, S.‐E., additional, Henneke, J., additional, Herd, C. D. K., additional, Horgan, B. H. N., additional, Johnson, J. R., additional, Joseph, J., additional, Kronyak, R. E., additional, Madariaga, J. M., additional, Maki, J. N., additional, Mandon, L., additional, McCubbin, F. M., additional, McLennan, S. M., additional, Moeller, R. C., additional, Newman, C. E., additional, Núñez, J. I., additional, Pascuzzo, A. C., additional, Pedersen, D. A., additional, Poggiali, G., additional, Pinet, P., additional, Quantin‐Nataf, C., additional, Rice, M., additional, Rice, J. W., additional, Royer, C., additional, Schmidt, M., additional, Sephton, M., additional, Sharma, S., additional, Siljeström, S., additional, Stack, K. M., additional, Steele, A., additional, Sun, V. Z., additional, Udry, A., additional, VanBommel, S., additional, Wadhwa, M., additional, Wiens, R. C., additional, Williams, A. J., additional, and Williford, K. H., additional

Published
2023
Full Text
View/download PDF

35. A Mars 2020 Perseverance SuperCam Perspective on the Igneous Nature of the Máaz Formation at Jezero Crater and Link With Séítah, Mars

Author

Udry, A., Ostwald, A., Sautter, V., Cousin, A., Beyssac, O., Forni, O., Dromart, G., Benzerara, K., Nachon, M., Horgan, B., Mandon, L., Clavé, E., Dehouck, E., Gibbons, E., Alwmark, S., Ravanis, E., Wiens, R. C., Legett, C., Anderson, R., Pilleri, P., Mangold, N., Schmidt, M., Liu, Y., Núñez, J. I., Castro, K., Madariaga, J. M., Kizovski, T., Beck, P., Bernard, S., Bosak, T., Brown, A., Clegg, S., Cloutis, E., Cohen, B., Connell, S., Crumpler, L., Debaille, V., Flannery, D., Fouchet, T., Gabriel, T. S.J., Gasnault, O., Herd, C. D.K., Johnson, J., Manrique, J. A., Maurice, S., McCubbin, F. M., McLennan, S., Ollila, A., Pinet, P., Quantin-Nataf, C., Udry, A., Ostwald, A., Sautter, V., Cousin, A., Beyssac, O., Forni, O., Dromart, G., Benzerara, K., Nachon, M., Horgan, B., Mandon, L., Clavé, E., Dehouck, E., Gibbons, E., Alwmark, S., Ravanis, E., Wiens, R. C., Legett, C., Anderson, R., Pilleri, P., Mangold, N., Schmidt, M., Liu, Y., Núñez, J. I., Castro, K., Madariaga, J. M., Kizovski, T., Beck, P., Bernard, S., Bosak, T., Brown, A., Clegg, S., Cloutis, E., Cohen, B., Connell, S., Crumpler, L., Debaille, V., Flannery, D., Fouchet, T., Gabriel, T. S.J., Gasnault, O., Herd, C. D.K., Johnson, J., Manrique, J. A., Maurice, S., McCubbin, F. M., McLennan, S., Ollila, A., Pinet, P., and Quantin-Nataf, C.

Abstract

The Máaz formation consists of the first lithologies in Jezero crater analyzed by the Mars 2020 Perseverance rover. This formation, investigated from Sols (Martian days) 1 to 201 and from Sols 343 to 382, overlies the Séítah formation (previously described as an olivine-rich cumulate) and was initially suggested to represent an igneous crater floor unit based on orbital analyses. Using SuperCam data, we conducted a detailed textural, chemical, and mineralogical analyses of the Máaz formation and the Content member of the Séítah formation. We conclude that the Máaz formation and the Content member are igneous and consist of different lava flows and/or possibly pyroclastic flows with complex textures, including vesicular and non-vesicular rocks with different grain sizes. The Máaz formation rocks exhibit some of the lowest Mg# (=molar 100 × MgO/MgO + FeO) of all Martian igneous rocks analyzed so far (including meteorites and surface rocks) and show similar basaltic to basaltic-andesitic compositions. Their mineralogy is dominated by Fe-rich augite to possibly ferrosilite and plagioclase, and minor phases such as Fe-Ti oxides and Si-rich phases. They show a broad diversity of both compositions and textures when compared to Martian meteorites and other surface rocks. The different Máaz and Content lava or pyroclastic flows all originate from the same parental magma and/or the same magmatic system, but are not petrogenetically linked to the Séítah formation. The study of returned Máaz samples in Earth-based laboratories will help constrain the formation of these rocks, calibrate Martian crater counting, and overall, improve our understanding of magmatism on Mars.

Published
2023

36. In Situ Geologic Context Mapping Transect on the Floor of Jezero Crater from Mars 2020 Perseverance Rover Observations

Author

Crumpler, L. S., Horgan, B., Simon, J., Stack, K., Alwmark, S., Gilles, D., Wiens, R., Udry, A., Brown, A., Russell, P., Amundson, H., Hamran, S‐e., Bell, J., Shuster, D., Calef, F., Núñez, J., Cohen, B., Flannery, D., Herd, C. D. K., Hand, K., Maki, J., Schmidt, M., Golombek, M., Williams, N., Crumpler, L. S., Horgan, B., Simon, J., Stack, K., Alwmark, S., Gilles, D., Wiens, R., Udry, A., Brown, A., Russell, P., Amundson, H., Hamran, S‐e., Bell, J., Shuster, D., Calef, F., Núñez, J., Cohen, B., Flannery, D., Herd, C. D. K., Hand, K., Maki, J., Schmidt, M., Golombek, M., and Williams, N.

Abstract

In situ geologic context mapping (GXM) based on rover and helicopter observations provides documentation of a nearly continuous record of geology and exposed surface structure over a 120 m-wide corridor along the traverse of the Mars 2020 /Perseverance rover. The results record the geologic context of Mars 2020 campaign sites and sample sites including the local extent of bedrock outcrops, stratigraphy, attitude, and structure from imaging and rover-based remote sensing, and outcrop lithology based on in situ proximity science. Mapping identifies a sequence of igneous lithologies including: (1) early mafic, possibly intrusive, rocks; (2) pervasively fractured and deeply altered massive bedrock of undetermined protolith; (3) buried and exhumed lava flows with pahoehoe and aa textures; (4) several varieties of regolith; and (5) small impact craters.

Published
2023

37. Diverse Lava Flow Morphologies in the Stratigraphy of the Jezero Crater Floor

Author

Alwmark, S., Horgan, B., Udry, A., Bechtold, A., Fagents, S., Ravanis, E., Crumpler, L., Schmitz, N., Cloutis, E., Brown, A., Flannery, D., Gasnault, O., Grotzinger, J., Gupta, S., Kah, L., Kelemen, P., Kinch, K., Núñez, J., Alwmark, S., Horgan, B., Udry, A., Bechtold, A., Fagents, S., Ravanis, E., Crumpler, L., Schmitz, N., Cloutis, E., Brown, A., Flannery, D., Gasnault, O., Grotzinger, J., Gupta, S., Kah, L., Kelemen, P., Kinch, K., and Núñez, J.

Abstract

We present a combined geomorphologic, multispectral, and geochemical analysis of crater floor rocks in Jezero crater based on data obtained by the Mast Camera Zoom and SuperCam instruments onboard the NASA Mars 2020 Perseverance rover. The combined data from this analysis together with the results of a comparative study with geologic sites on Earth allows us to interpret the origins of rocks exposed along the Artuby ridge, a ∼900 m long scarp of lower Máaz formation rocks. The ridge exposes rocks belonging to two morphologically distinct members, Artuby and Rochette, both of which have basaltic composition and are spectrally indistinguishable in our analysis. Artuby rocks consist of morphologically distinct units that alternate over the ridge, bulbous, hummocky, layers with varying thicknesses that in places appear to have flowed over underlying strata, and sub-planar thinner laterally continuous layers with variable friability. The Rochette member has a massive appearance with pronounced pitting and sub-horizontal partings. Our findings are most consistent with a primary igneous emplacement as lava flows, through multiple eruptions, and we propose that the thin layers result either from preferential weathering, interbedded ash/tephra layers, ʻaʻā clinker layers, or aeolian deposition. Our analyses provide essential geologic context for the Máaz formation samples that will be returned to Earth and highlight the diversity and complexity of geologic processes on Mars not visible from orbit.

Published
2023

38. Samples Collected from the Floor of Jezero Crater with the Mars 2020 Perseverance Rover

Author

Simon, J. I., Hickman-Lewis, K., Cohen, B. A., Mayhew, L.E., Shuster, D.L., Debaille, V., Hausrath, E. M., Weiss, B.P., Bosak, T., Zorzano, M.-P., Amundsen, H. E. F., Beegle, L.W., Bell III, J.F., Benison, K. C., Berger, E. L., Beyssac, O., Brown, A.J., Calef, F., Casademont, T. M., Clark, B., Clavé, E., Crumpler, L., Czaja, A. D., Fairén, A. G., Farley, K. A., Flannery, D. T., Fornaro, T., Forni, O., Gómez, F., Goreva, Y., Gorin, A., Hand, K. P., Hamran, S.-E., Henneke, J., Herd, C. D. K., Horgan, B. H. N., Johnson, J. R., Joseph, J., Kronyak, R. E., Madariaga, J. M., Maki, J. N., Mandon, L., McCubbin, F. M., McLennan, S. M., Moeller, R. C., Newman, C. E., Núñez, J. I., Pascuzzo, A. C., Pedersen, D. A., Poggiali, G., Pinet, P., Quantin-Nataf, C., Rice, M., Rice Jr., J. W., Royer, C., Schmidt, M., Sephton, M., Sharma, S., Siljeström, S., Stack, K. M., Steele, A., Sun, V. Z., Udry, A., VanBommel, S., Wadhwa, M., Wiens, R. C., Williams, A. J., Williford, K. H., Simon, J. I., Hickman-Lewis, K., Cohen, B. A., Mayhew, L.E., Shuster, D.L., Debaille, V., Hausrath, E. M., Weiss, B.P., Bosak, T., Zorzano, M.-P., Amundsen, H. E. F., Beegle, L.W., Bell III, J.F., Benison, K. C., Berger, E. L., Beyssac, O., Brown, A.J., Calef, F., Casademont, T. M., Clark, B., Clavé, E., Crumpler, L., Czaja, A. D., Fairén, A. G., Farley, K. A., Flannery, D. T., Fornaro, T., Forni, O., Gómez, F., Goreva, Y., Gorin, A., Hand, K. P., Hamran, S.-E., Henneke, J., Herd, C. D. K., Horgan, B. H. N., Johnson, J. R., Joseph, J., Kronyak, R. E., Madariaga, J. M., Maki, J. N., Mandon, L., McCubbin, F. M., McLennan, S. M., Moeller, R. C., Newman, C. E., Núñez, J. I., Pascuzzo, A. C., Pedersen, D. A., Poggiali, G., Pinet, P., Quantin-Nataf, C., Rice, M., Rice Jr., J. W., Royer, C., Schmidt, M., Sephton, M., Sharma, S., Siljeström, S., Stack, K. M., Steele, A., Sun, V. Z., Udry, A., VanBommel, S., Wadhwa, M., Wiens, R. C., Williams, A. J., and Williford, K. H.

Abstract

The first samples collected by the Mars 2020 mission represent units exposed on the Jezero Crater floor, from the potentially oldest Séítah formation outcrops to the potentially youngest rocks of the heavily cratered Máaz formation. Surface investigations reveal landscape-to-microscopic textural, mineralogical, and geochemical evidence for igneous lithologies, some possibly emplaced as lava flows. The samples contain major rock-forming minerals such as pyroxene, olivine, and feldspar, accessory minerals including oxides and phosphates, and evidence for various degrees of aqueous activity in the form of water-soluble salt, carbonate, sulfate, iron oxide, and iron silicate minerals. Following sample return, the compositions and ages of these variably altered igneous rocks are expected to reveal the geophysical and geochemical nature of the planet’s interior at the time of emplacement, characterize martian magmatism, and place timing constraints on geologic processes, both in Jezero Crater and more widely on Mars. Petrographic observations and geochemical analyses, coupled with geochronology of secondary minerals, can also reveal the timing of aqueous activity as well as constrain the chemical and physical conditions of the environments in which these minerals precipitated, and the nature and composition of organic compounds preserved in association with these phases. Returned samples from these units will help constrain the crater chronology of Mars and the global evolution of the planet’s interior, for understanding the processes that formed Jezero Crater floor units, and for constraining the style and duration of aqueous activity in Jezero Crater, past habitability, and cycling of organic elements in Jezero Crater.

Published
2023

39. Diverse Lava Flow Morphologies in the Stratigraphy of the Jezero Crater Floor

Author

Alwmark, S., primary, Horgan, B., additional, Udry, A., additional, Bechtold, A., additional, Fagents, S., additional, Ravanis, E., additional, Crumpler, L., additional, Schmitz, N., additional, Cloutis, E., additional, Brown, A., additional, Flannery, D., additional, Gasnault, O., additional, Grotzinger, J., additional, Gupta, S., additional, Kah, L., additional, Kelemen, P., additional, Kinch, K., additional, and Núñez, J., additional

Published
2023
Full Text
View/download PDF

44. An olivine cumulate outcrop on the floor of Jezero crater, Mars

Author

Liu, Y., primary, Tice, M. M., additional, Schmidt, M. E., additional, Treiman, A. H., additional, Kizovski, T. V., additional, Hurowitz, J. A., additional, Allwood, A. C., additional, Henneke, J., additional, Pedersen, D. A. K., additional, VanBommel, S. J., additional, Jones, M. W. M., additional, Knight, A. L., additional, Orenstein, B. J., additional, Clark, B. C., additional, Elam, W. T., additional, Heirwegh, C. M., additional, Barber, T., additional, Beegle, L. W., additional, Benzerara, K., additional, Bernard, S., additional, Beyssac, O., additional, Bosak, T., additional, Brown, A. J., additional, Cardarelli, E. L., additional, Catling, D. C., additional, Christian, J. R., additional, Cloutis, E. A., additional, Cohen, B. A., additional, Davidoff, S., additional, Fairén, A. G., additional, Farley, K. A., additional, Flannery, D. T., additional, Galvin, A., additional, Grotzinger, J. P., additional, Gupta, S., additional, Hall, J., additional, Herd, C. D. K., additional, Hickman-Lewis, K., additional, Hodyss, R. P., additional, Horgan, B. H. N., additional, Johnson, J. R., additional, Jørgensen, J. L., additional, Kah, L. C., additional, Maki, J. N., additional, Mandon, L., additional, Mangold, N., additional, McCubbin, F. M., additional, McLennan, S. M., additional, Moore, K., additional, Nachon, M., additional, Nemere, P., additional, Nothdurft, L. D., additional, Núñez, J. I., additional, O’Neil, L., additional, Quantin-Nataf, C. M., additional, Sautter, V., additional, Shuster, D. L., additional, Siebach, K. L., additional, Simon, J. I., additional, Sinclair, K. P., additional, Stack, K. M., additional, Steele, A., additional, Tarnas, J. D., additional, Tosca, N. J., additional, Uckert, K., additional, Udry, A., additional, Wade, L. A., additional, Weiss, B. P., additional, Wiens, R. C., additional, Williford, K. H., additional, and Zorzano, M.-P., additional

Published
2022
Full Text
View/download PDF

45. Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars

Author

Farley, K. A., primary, Stack, K. M., additional, Shuster, D. L., additional, Horgan, B. H. N., additional, Hurowitz, J. A., additional, Tarnas, J. D., additional, Simon, J. I., additional, Sun, V. Z., additional, Scheller, E. L., additional, Moore, K. R., additional, McLennan, S. M., additional, Vasconcelos, P. M., additional, Wiens, R. C., additional, Treiman, A. H., additional, Mayhew, L. E., additional, Beyssac, O., additional, Kizovski, T. V., additional, Tosca, N. J., additional, Williford, K. H., additional, Crumpler, L. S., additional, Beegle, L. W., additional, Bell, J. F., additional, Ehlmann, B. L., additional, Liu, Y., additional, Maki, J. N., additional, Schmidt, M. E., additional, Allwood, A. C., additional, Amundsen, H. E. F., additional, Bhartia, R., additional, Bosak, T., additional, Brown, A. J., additional, Clark, B. C., additional, Cousin, A., additional, Forni, O., additional, Gabriel, T. S. J., additional, Goreva, Y., additional, Gupta, S., additional, Hamran, S.-E., additional, Herd, C. D. K., additional, Hickman-Lewis, K., additional, Johnson, J. R., additional, Kah, L. C., additional, Kelemen, P. B., additional, Kinch, K. B., additional, Mandon, L., additional, Mangold, N., additional, Quantin-Nataf, C., additional, Rice, M. S., additional, Russell, P. S., additional, Sharma, S., additional, Siljeström, S., additional, Steele, A., additional, Sullivan, R., additional, Wadhwa, M., additional, Weiss, B. P., additional, Williams, A. J., additional, Wogsland, B. V., additional, Willis, P. A., additional, Acosta-Maeda, T. A., additional, Beck, P., additional, Benzerara, K., additional, Bernard, S., additional, Burton, A. S., additional, Cardarelli, E. L., additional, Chide, B., additional, Clavé, E., additional, Cloutis, E. A., additional, Cohen, B. A., additional, Czaja, A. D., additional, Debaille, V., additional, Dehouck, E., additional, Fairén, A. G., additional, Flannery, D. T., additional, Fleron, S. Z., additional, Fouchet, T., additional, Frydenvang, J., additional, Garczynski, B. J., additional, Gibbons, E. F., additional, Hausrath, E. M., additional, Hayes, A. G., additional, Henneke, J., additional, Jørgensen, J. L., additional, Kelly, E. M., additional, Lasue, J., additional, Le Mouélic, S., additional, Madariaga, J. M., additional, Maurice, S., additional, Merusi, M., additional, Meslin, P.-Y., additional, Milkovich, S. M., additional, Million, C. C., additional, Moeller, R. C., additional, Núñez, J. I., additional, Ollila, A. M., additional, Paar, G., additional, Paige, D. A., additional, Pedersen, D. A. K., additional, Pilleri, P., additional, Pilorget, C., additional, Pinet, P. C., additional, Rice, J. W., additional, Royer, C., additional, Sautter, V., additional, Schulte, M., additional, Sephton, M. A., additional, Sharma, S. K., additional, Sholes, S. F., additional, Spanovich, N., additional, St. Clair, M., additional, Tate, C. D., additional, Uckert, K., additional, VanBommel, S. J., additional, Yanchilina, A. G., additional, and Zorzano, M.-P., additional

Published
2022
Full Text
View/download PDF

46. Effect of an immediate, remote smoking cessation intervention vs usual care among participants enrolled in lung health check: QuLIT2 study.

Author

Parris, W, primary, Philip, K, additional, Kaur-Gill, N, additional, Flannery, D, additional, Buttery, S, additional, Bartlett, E, additional, Devaraj, A, additional, Addis, J, additional, Kemp, S, additional, Chen, M, additional, Derbyshire, J, additional, Morris, K, additional, Laverty, A, additional, and Hopkinson, N, additional

Published
2022
Full Text
View/download PDF

47. A comparison of the igneous máaz formation at jezero crater with martian meteorites

Author

Udry, A., Ostwald, A., Sautter, V., Cousin, A., Wiens, R. C., Forni, O., Benzerara, K., Beyssac, O., Nachon, M., Dromart, G., Quantin, C., Mandon, L., Clavé, E., Pinet, P., Ollila, A., Bosak, T., Mangold, N., Dehouck, E., Johnson, J., Schmidt, M., Horgan, B., Gabriel, T., Mclennan, S., Maurice, S., Simon, J.I., Herd, C. D. K., M.Madiaraga, J., Brown, A, Connell, S., Flannery, D., Tosca, N., Cohen, B., Liu, Y., Mccubbin, F. M., Cloutis, E., Fouchet, T., Royer, C., Alwmark, S., Sharma, S., Anderson, R., Pilleri, P, University of Nevada [Las Vegas] (WGU Nevada), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Los Alamos National Laboratory (LANL), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Texas A&M University System, École normale supérieure de Lyon (ENS de Lyon), Massachusetts Institute of Technology (MIT), Johns Hopkins University (JHU), Brock University [Canada], Purdue University [West Lafayette], United States Geological Survey (USGS), Stony Brook University [SUNY] (SBU), State University of New York (SUNY), Astromaterials Research and Exploration Science (ARES), NASA Johnson Space Center (JSC), NASA-NASA, University of Alberta, University of the Basque Country/Euskal Herriko Unibertsitatea (UPV/EHU), NASA, University of Winnipeg, Queensland University of Technology [Brisbane] (QUT), University of Cambridge [UK] (CAM), California Institute of Technology (CALTECH), Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), University of Copenhagen = Københavns Universitet (UCPH), Hawaii Institute of Geophysics and Planetology (HIGP), and University of Hawai‘i [Mānoa] (UHM)

Subjects
jezero crater, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU]Sciences of the Universe [physics], rover, mars mineralogy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, supercam, meteorites
Abstract

International audience

Published
2022

49. Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars

Author

Farley, K A, Stack, K M, Shuster, D L, Horgan, B H N, Hurowitz, J A, Tarnas, J D, Simon, J I, Sun, V Z, Scheller, E L, Moore, K R, McLennan, S M, Vasconcelos, P M, Wiens, R C, Treiman, A H, Mayhew, L E, Beyssac, O, Kizovski, T V, Tosca, N J, Williford, K H, Crumpler, L S, Beegle, L W, Bell, J F, Ehlmann, B L, Liu, Y, Maki, J N, Schmidt, M E, Allwood, A C, Amundsen, H E F, Bhartia, R, Bosak, T, Brown, A J, Clark, B C, Cousin, A, Forni, O, Gabriel, T S J, Goreva, Y, Gupta, S, Hamran, S-E, Herd, C D K, Hickman-Lewis, K, Johnson, J R, Kah, L C, Kelemen, P B, Kinch, K B, Mandon, L, Mangold, N, Quantin-Nataf, C, Rice, M S, Russell, P S, Sharma, S K, Siljeström, S, Steele, A, Sullivan, R, Wadhwa, M, Weiss, B P, Williams, A J, Wogsland, B V, Willis, P A, Acosta-Maeda, T A, Beck, P, Benzerara, K, Bernard, S, Burton, A S, Cardarelli, E L, Chide, B, Clavé, E, Cloutis, E A, Cohen, B A, Czaja, A D, Debaille, V, Dehouck, E, Fairén, A G, Flannery, D T, Fleron, S Z, Fouchet, T, Frydenvang, J, Garczynski, B J, Gibbons, E F, Hausrath, E M, Hayes, A G, Henneke, J, Jørgensen, J L, Kelly, E M, Lasue, J, Le Mouélic, S, Madariaga, J M, Maurice, S, Merusi, M, Meslin, P-Y, Milkovich, S M, Million, C C, Moeller, R C, Núñez, J I, Ollila, A M, Paar, G, Paige, D A, Pedersen, D A K, Pilleri, P, Pilorget, C, Pinet, P C, Rice, J W, Royer, C, Sautter, V, Schulte, M, Sephton, M A, Sholes, S F, Spanovich, N, St Clair, M, Tate, C D, Uckert, K, VanBommel, S J, Yanchilina, A G, Zorzano, M-P, Farley, K A, Stack, K M, Shuster, D L, Horgan, B H N, Hurowitz, J A, Tarnas, J D, Simon, J I, Sun, V Z, Scheller, E L, Moore, K R, McLennan, S M, Vasconcelos, P M, Wiens, R C, Treiman, A H, Mayhew, L E, Beyssac, O, Kizovski, T V, Tosca, N J, Williford, K H, Crumpler, L S, Beegle, L W, Bell, J F, Ehlmann, B L, Liu, Y, Maki, J N, Schmidt, M E, Allwood, A C, Amundsen, H E F, Bhartia, R, Bosak, T, Brown, A J, Clark, B C, Cousin, A, Forni, O, Gabriel, T S J, Goreva, Y, Gupta, S, Hamran, S-E, Herd, C D K, Hickman-Lewis, K, Johnson, J R, Kah, L C, Kelemen, P B, Kinch, K B, Mandon, L, Mangold, N, Quantin-Nataf, C, Rice, M S, Russell, P S, Sharma, S K, Siljeström, S, Steele, A, Sullivan, R, Wadhwa, M, Weiss, B P, Williams, A J, Wogsland, B V, Willis, P A, Acosta-Maeda, T A, Beck, P, Benzerara, K, Bernard, S, Burton, A S, Cardarelli, E L, Chide, B, Clavé, E, Cloutis, E A, Cohen, B A, Czaja, A D, Debaille, V, Dehouck, E, Fairén, A G, Flannery, D T, Fleron, S Z, Fouchet, T, Frydenvang, J, Garczynski, B J, Gibbons, E F, Hausrath, E M, Hayes, A G, Henneke, J, Jørgensen, J L, Kelly, E M, Lasue, J, Le Mouélic, S, Madariaga, J M, Maurice, S, Merusi, M, Meslin, P-Y, Milkovich, S M, Million, C C, Moeller, R C, Núñez, J I, Ollila, A M, Paar, G, Paige, D A, Pedersen, D A K, Pilleri, P, Pilorget, C, Pinet, P C, Rice, J W, Royer, C, Sautter, V, Schulte, M, Sephton, M A, Sholes, S F, Spanovich, N, St Clair, M, Tate, C D, Uckert, K, VanBommel, S J, Yanchilina, A G, and Zorzano, M-P

Abstract

The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river deposits. We report observations of the crater floor, below the crater’s sedimentary delta, finding the floor consists of igneous rocks altered by water. The lowest exposed unit, informally named Séítah, is a coarsely crystalline olivine-rich rock, which accumulated at the base of a magma body. Fe-Mg carbonates along grain boundaries indicate reactions with CO2-rich water, under water-poor conditions. Overlying Séítah is a unit informally named Máaz, which we interpret as lava flows or the chemical complement to Séítah in a layered igneous body. Voids in these rocks contain sulfates and perchlorates, likely introduced by later near-surface brine evaporation. Core samples of these rocks were stored aboard Perseverance for potential return to Earth.

Published
2022

50. Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars

Author

Farley, K. A., Stack, K. M., Shuster, D. L., Horgan, B. H. N., Hurowitz, J. A., Tarnas, J. D., Simon, J. I., Sun, V. Z., Scheller, E. L., Moore, K. R., McLennan, S. M., Vasconcelos, P. M., Wiens, R. C., Treiman, A. H., Mayhew, L. E., Beyssac, O., Kizovski, T. V., Tosca, N. J., Williford, K. H., Crumpler, L. S., Beegle, L. W., Bell, J. F., Ehlmann, B. L., Liu, Y., Maki, J. N., Schmidt, M. E., Allwood, A. C., Amundsen, H. E. F., Bhartia, R., Bosak, T., Brown, A. J., Clark, B. C., Cousin, A., Forni, O., Gabriel, T. S. J., Goreva, Y., Gupta, S., Hamran, S.-E., Herd, C. D. K., Hickman-Lewis, K., Johnson, J. R., Kah, L. C., Kelemen, P. B., Kinch, K. B., Mandon, L., Mangold, N., Quantin-Nataf, C., Rice, M. S., Russell, P. S., Sharma, S., Siljeström, S., Steele, A., Sullivan, R., Wadhwa, M., Weiss, B. P., Williams, A. J., Wogsland, B. V., Willis, P. A., Acosta-Maeda, T. A., Beck, P., Benzerara, K., Bernard, S., Burton, A. S., Cardarelli, E. L., Chide, B., Clavé, E., Cloutis, E. A., Cohen, B. A., Czaja, A. D., Debaille, V., Dehouck, E., Fairén, A. G., Flannery, D. T., Fleron, S. Z., Fouchet, T., Frydenvang, J., Garczynski, B. J., Gibbons, E. F., Hausrath, E. M., Hayes, A. G., Henneke, J., Jørgensen, J. L., Kelly, E. M., Lasue, J., Le Mouélic, S., Madariaga, J. M., Maurice, S., Merusi, M., Meslin, P.-Y., Milkovich, S. M., Million, C. C., Moeller, R. C., Nuñez, J. I., Ollila, A. M., Paar, G., Paige, D. A., Pedersen, D. A. K., Pilleri, P., Pilorget, C., Pinet, P. C., Rice, J. W., Royer, C., Sautter, V., Schulte, M., Sephton, M. A., Sharma, S. K., Sholes, S. F., Spanovich, N., Clair, M. St., Tate, C. D., Uckert, K., VanBommel, S. J., Yanchilina, A. G., Zorzano, M.-P., Farley, K. A., Stack, K. M., Shuster, D. L., Horgan, B. H. N., Hurowitz, J. A., Tarnas, J. D., Simon, J. I., Sun, V. Z., Scheller, E. L., Moore, K. R., McLennan, S. M., Vasconcelos, P. M., Wiens, R. C., Treiman, A. H., Mayhew, L. E., Beyssac, O., Kizovski, T. V., Tosca, N. J., Williford, K. H., Crumpler, L. S., Beegle, L. W., Bell, J. F., Ehlmann, B. L., Liu, Y., Maki, J. N., Schmidt, M. E., Allwood, A. C., Amundsen, H. E. F., Bhartia, R., Bosak, T., Brown, A. J., Clark, B. C., Cousin, A., Forni, O., Gabriel, T. S. J., Goreva, Y., Gupta, S., Hamran, S.-E., Herd, C. D. K., Hickman-Lewis, K., Johnson, J. R., Kah, L. C., Kelemen, P. B., Kinch, K. B., Mandon, L., Mangold, N., Quantin-Nataf, C., Rice, M. S., Russell, P. S., Sharma, S., Siljeström, S., Steele, A., Sullivan, R., Wadhwa, M., Weiss, B. P., Williams, A. J., Wogsland, B. V., Willis, P. A., Acosta-Maeda, T. A., Beck, P., Benzerara, K., Bernard, S., Burton, A. S., Cardarelli, E. L., Chide, B., Clavé, E., Cloutis, E. A., Cohen, B. A., Czaja, A. D., Debaille, V., Dehouck, E., Fairén, A. G., Flannery, D. T., Fleron, S. Z., Fouchet, T., Frydenvang, J., Garczynski, B. J., Gibbons, E. F., Hausrath, E. M., Hayes, A. G., Henneke, J., Jørgensen, J. L., Kelly, E. M., Lasue, J., Le Mouélic, S., Madariaga, J. M., Maurice, S., Merusi, M., Meslin, P.-Y., Milkovich, S. M., Million, C. C., Moeller, R. C., Nuñez, J. I., Ollila, A. M., Paar, G., Paige, D. A., Pedersen, D. A. K., Pilleri, P., Pilorget, C., Pinet, P. C., Rice, J. W., Royer, C., Sautter, V., Schulte, M., Sephton, M. A., Sharma, S. K., Sholes, S. F., Spanovich, N., Clair, M. St., Tate, C. D., Uckert, K., VanBommel, S. J., Yanchilina, A. G., and Zorzano, M.-P.

Abstract

The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river deposits. We report observations of the crater floor, below the crater's sedimentary delta, finding that the floor consists of igneous rocks altered by water. The lowest exposed unit, informally named Seitah, is a coarsely crystalline olivine-rich rock, which accumulated at the base of a magma body. Magnesium-iron carbonates along grain boundaries indicate reactions with carbon dioxide-rich water under water-poor conditions. Overlying Seitah is a unit informally named Maaz, which we interpret as lava flows or the chemical complement to Seitah in a layered igneous body. Voids in these rocks contain sulfates and perchlorates, likely introduced by later near-surface brine evaporation. Core samples of these rocks have been stored aboard Perseverance for potential return to Earth.

Published
2022

Catalog

Books, media, physical & digital resources
See catalog results