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Start Over Author "Malin, Michael" Publisher american association for the advancement of science
10 results on '"Malin, Michael"'

2. Evidence for persistent flow and aqueous sedimentation on early Mars

Author

Malin, Michael C. and Edgett, Kenneth S.

Subjects
Hydrogeology -- Research -- Discovery and exploration, Mars (Planet) -- Natural history -- Discovery and exploration -- Research, Science and technology, Discovery and exploration, Research, Natural history
Abstract

Landforms representative of sedimentary processes and environments that occurred early in martian history have been recognized in Mars Global Surveyor Mars Orbiter Camera and Mars Odyssey Thermal Emission Imaging System images. Evidence of distributary, channelized flow (in particular, flow that lasted long enough to foster meandering) and the resulting deposition of a fan-shaped apron of debris indicate persistent flow conditions and formation of at least some large intracrater layered sedimentary sequences within fluvial, and potentially lacustrine, environments., The distribution in space and time of liquid water on Mars (1-4) remains unresolved, despite an increasing base of observational data about its influence on geological materials. In part, this [...]

Published
2003

3. Morphology and composition of the surface of Mars: Mars Odyssey THEMIS results. (Research Articles)

Author

Christensen, Philip R., Bandfield, Joshua L., Bell, III, James F., Gorelick, Noel, Hamilton, Victoria E., Ivanov, Anton, Jakosky, Bruce M., Kieffer, Hugh H., Lane, Melissa D., Malin, Michael C., McConnochie, Timothy, McEwen, Alfred S., McSween, Jr., Harry Y., Mehall, Greg L., Moersch, Jeffery E., Nealson, Kenneth H., Rice, Jr., James W., Richardson, Mark I., Ruff, Steven W., Smith, Michael D., Titus, Timothy N., and Wyatt, Michael B.

Subjects
Mars Odyssey (Space vehicle) -- Research, Mars (Planet) -- Research -- Technology application, Science and technology, Technology application, Research
Abstract

The Thermal Emission Imaging System (THEMIS) on Mars Odyssey has produced infrared to visible wavelength images of the martian surface that show lithologically distinct Layers with variable thickness, implying temporal changes in the processes or environments during or after their formation. Kilometer-scale exposures of bedrock are observed; elsewhere airfall dust completely mantles the surface over thousands of square kilometers. Mars has compositional variations at qO0-meter scales, for example, an exposure of olivine-rich basalt in the walls of Ganges Chasma. Thermally distinct ejecta facies occur around some craters with variations associated with crater age. Polar observations have identified temporal patches of water frost in the north polar cap. No thermal signatures associated with endogenic heat sources have been identified., THEMIS began observing the surface and atmosphere of Mars in February 2002 with the use of thermal infrared (IR) multispectral imaging between 6.5 and 15 µm and visible to near-IR [...]

Published
2003

4. Hot-spot evolution and the global tectonics of Venus

Author

Phillips, Roger J., Grimm, Robert E., and Malin, Michael C.

Subjects
Geology, Structural -- Research, Venus (Planet) -- Natural history -- Research, Science and technology, Research, Natural history
Abstract

The global tectonics of Venus may be dominated by plumes rising from the mantle and impinging on the lithosphere, giving rise to hot spots. Global sea-floor spreading does not take [...]

Published
1991

6. Sedimentary Rocks of Early Mars

Author

Malin, Michael C. and Edgett, Kenneth S.

Subjects
Mars (Planet) -- Natural history, Science and technology, Natural history
Abstract

Layered and massive outcrops on Mars, some as thick as 4 kilometers, display the geomorphic attributes and stratigraphic relations of sedimentary rock. Repeated beds in some locations imply a dynamic depositional environment during early martian history. Subaerial (such as eolian, impact, and volcaniclastic) and subaqueous processes may have contributed to the formation of the layers. Affinity for impact craters suggests dominance of lacustrine deposition; alternatively, the materials were deposited in a dry, subaerial setting in which atmospheric density, and variations thereof mimic a subaqueous depositional environment. The source regions and transport paths for the materials are not preserved., Deciphering the geologic history of Mars is today one of the most important areas of research in space science. In addition to the intrinsic interest in understanding how planets evolve [...]

Published
2000

7. Evidence for Recent Groundwater Seepage and Surface Runoff on Mars

Author

Malin, Michael C. and Edgett, Kenneth S.

Subjects
Mars Global Surveyor (Space probe) -- Usage, Mars (Planet) -- Observations -- Usage, Science and technology, Observations, Usage
Abstract

Relatively young landforms on Mars, seen in high-resolution images acquired by the Mars Global Surveyor Mars Orbiter Camera since March 1999, suggest the presence of sources of liquid water at shallow depths beneath the martian surface. Found at middle and high martian latitudes (particularly in the southern hemisphere), gullies within the walls of a very small number of impact craters, south polar pits, and two of the larger martian valleys display geomorphic features that can be explained by processes associated with groundwater seepage and surface runoff. The relative youth of the landforms is indicated by the superposition of the gullies on otherwise geologically young surfaces and by the absence of superimposed landforms or cross-cutting features, including impact craters, small polygons, and eolian dunes. The limited size and geographic distribution of the features argue for constrained source reservoirs., Present-day Mars is a desert world on which liquid water is not likely to be found at the surface, because average temperatures are below 273 K and atmospheric pressures are [...]

Published
2000

9. Evidence for Persistent Flow and Aqueous Sedimentation onEarly Mars.

Author

Malin, Michael C. and Edgett, Kenneth S.

Subjects
*SEDIMENTATION & deposition, *MARS (Planet), *IMAGING systems, *LANDFORMS
Abstract

Landforms representative of sedimentary processes and environments that occurred early in martian history have been recognized in Mars Global Surveyor Mars Orbiter Camera and Mars Odyssey Thermal Emission Imaging System images. Evidence of distributary, channelized flow (in particular, flow that lasted long enough to foster meandering) and the resulting deposition of a fan-shaped apron of debris indicate persistent flow conditions and formation of at least some large intracrater layered sedimentary sequences within fluvial, and potentially lacustrine, environments. [ABSTRACT FROM AUTHOR]

Published
2003
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10. Isotope ratios of H, C, and O in CO2 and H2O of the martian atmosphere.

Author

Webster CR, Mahaffy PR, Flesch GJ, Niles PB, Jones JH, Leshin LA, Atreya SK, Stern JC, Christensen LE, Owen T, Franz H, Pepin RO, Steele A, Achilles C, Agard C, Alves Verdasca JA, Anderson R, Anderson R, Archer D, Armiens-Aparicio C, Arvidson R, Atlaskin E, Aubrey A, Baker B, Baker M, Balic-Zunic T, Baratoux D, Baroukh J, Barraclough B, Bean K, Beegle L, Behar A, Bell J, Bender S, Benna M, Bentz J, Berger G, Berger J, Berman D, Bish D, Blake DF, Blanco Avalos JJ, Blaney D, Blank J, Blau H, Bleacher L, Boehm E, Botta O, Böttcher S, Boucher T, Bower H, Boyd N, Boynton B, Breves E, Bridges J, Bridges N, Brinckerhoff W, Brinza D, Bristow T, Brunet C, Brunner A, Brunner W, Buch A, Bullock M, Burmeister S, Cabane M, Calef F, Cameron J, Campbell J, Cantor B, Caplinger M, Caride Rodríguez J, Carmosino M, Carrasco Blázquez I, Charpentier A, Chipera S, Choi D, Clark B, Clegg S, Cleghorn T, Cloutis E, Cody G, Coll P, Conrad P, Coscia D, Cousin A, Cremers D, Crisp J, Cros A, Cucinotta F, d'Uston C, Davis S, Day M, de la Torre Juarez M, DeFlores L, DeLapp D, DeMarines J, DesMarais D, Dietrich W, Dingler R, Donny C, Downs B, Drake D, Dromart G, Dupont A, Duston B, Dworkin J, Dyar MD, Edgar L, Edgett K, Edwards C, Edwards L, Ehlmann B, Ehresmann B, Eigenbrode J, Elliott B, Elliott H, Ewing R, Fabre C, Fairén A, Farley K, Farmer J, Fassett C, Favot L, Fay D, Fedosov F, Feldman J, Feldman S, Fisk M, Fitzgibbon M, Floyd M, Flückiger L, Forni O, Fraeman A, Francis R, François P, Freissinet C, French KL, Frydenvang J, Gaboriaud A, Gailhanou M, Garvin J, Gasnault O, Geffroy C, Gellert R, Genzer M, Glavin D, Godber A, Goesmann F, Goetz W, Golovin D, Gómez Gómez F, Gómez-Elvira J, Gondet B, Gordon S, Gorevan S, Grant J, Griffes J, Grinspoon D, Grotzinger J, Guillemot P, Guo J, Gupta S, Guzewich S, Haberle R, Halleaux D, Hallet B, Hamilton V, Hardgrove C, Harker D, Harpold D, Harri AM, Harshman K, Hassler D, Haukka H, Hayes A, Herkenhoff K, Herrera P, Hettrich S, Heydari E, Hipkin V, Hoehler T, Hollingsworth J, Hudgins J, Huntress W, Hurowitz J, Hviid S, Iagnemma K, Indyk S, Israël G, Jackson R, Jacob S, Jakosky B, Jensen E, Jensen JK, Johnson J, Johnson M, Johnstone S, Jones A, Joseph J, Jun I, Kah L, Kahanpää H, Kahre M, Karpushkina N, Kasprzak W, Kauhanen J, Keely L, Kemppinen O, Keymeulen D, Kim MH, Kinch K, King P, Kirkland L, Kocurek G, Koefoed A, Köhler J, Kortmann O, Kozyrev A, Krezoski J, Krysak D, Kuzmin R, Lacour JL, Lafaille V, Langevin Y, Lanza N, Lasue J, Le Mouélic S, Lee EM, Lee QM, Lees D, Lefavor M, Lemmon M, Lepinette Malvitte A, Léveillé R, Lewin-Carpintier É, Lewis K, Li S, Lipkaman L, Little C, Litvak M, Lorigny E, Lugmair G, Lundberg A, Lyness E, Madsen M, Maki J, Malakhov A, Malespin C, Malin M, Mangold N, Manhes G, Manning H, Marchand G, Marín Jiménez M, Martín García C, Martin D, Martin M, Martínez-Frías J, Martín-Soler J, Martín-Torres FJ, Mauchien P, Maurice S, McAdam A, McCartney E, McConnochie T, McCullough E, McEwan I, McKay C, McLennan S, McNair S, Melikechi N, Meslin PY, Meyer M, Mezzacappa A, Miller H, Miller K, Milliken R, Ming D, Minitti M, Mischna M, Mitrofanov I, Moersch J, Mokrousov M, Molina Jurado A, Moores J, Mora-Sotomayor L, Morookian JM, Morris R, Morrison S, Mueller-Mellin R, Muller JP, Muñoz Caro G, Nachon M, Navarro López S, Navarro-González R, Nealson K, Nefian A, Nelson T, Newcombe M, Newman C, Newsom H, Nikiforov S, Nixon B, Noe Dobrea E, Nolan T, Oehler D, Ollila A, Olson T, de Pablo Hernández MÁ, Paillet A, Pallier E, Palucis M, Parker T, Parot Y, Patel K, Paton M, Paulsen G, Pavlov A, Pavri B, Peinado-González V, Peret L, Perez R, Perrett G, Peterson J, Pilorget C, Pinet P, Pla-García J, Plante I, Poitrasson F, Polkko J, Popa R, Posiolova L, Posner A, Pradler I, Prats B, Prokhorov V, Purdy SW, Raaen E, Radziemski L, Rafkin S, Ramos M, Rampe E, Raulin F, Ravine M, Reitz G, Rennó N, Rice M, Richardson M, Robert F, Robertson K, Rodriguez Manfredi JA, Romeral-Planelló JJ, Rowland S, Rubin D, Saccoccio M, Salamon A, Sandoval J, Sanin A, Sans Fuentes SA, Saper L, Sarrazin P, Sautter V, Savijärvi H, Schieber J, Schmidt M, Schmidt W, Scholes D, Schoppers M, Schröder S, Schwenzer S, Sebastian Martinez E, Sengstacken A, Shterts R, Siebach K, Siili T, Simmonds J, Sirven JB, Slavney S, Sletten R, Smith M, Sobrón Sánchez P, Spanovich N, Spray J, Squyres S, Stack K, Stalport F, Stein T, Stewart N, Stipp SL, Stoiber K, Stolper E, Sucharski B, Sullivan R, Summons R, Sumner D, Sun V, Supulver K, Sutter B, Szopa C, Tan F, Tate C, Teinturier S, ten Kate I, Thomas P, Thompson L, Tokar R, Toplis M, Torres Redondo J, Trainer M, Treiman A, Tretyakov V, Urqui-O'Callaghan R, Van Beek J, Van Beek T, VanBommel S, Vaniman D, Varenikov A, Vasavada A, Vasconcelos P, Vicenzi E, Vostrukhin A, Voytek M, Wadhwa M, Ward J, Weigle E, Wellington D, Westall F, Wiens RC, Wilhelm MB, Williams A, Williams J, Williams R, Williams RB, Wilson M, Wimmer-Schweingruber R, Wolff M, Wong M, Wray J, Wu M, Yana C, Yen A, Yingst A, Zeitlin C, Zimdar R, and Zorzano Mier MP

Abstract

Stable isotope ratios of H, C, and O are powerful indicators of a wide variety of planetary geophysical processes, and for Mars they reveal the record of loss of its atmosphere and subsequent interactions with its surface such as carbonate formation. We report in situ measurements of the isotopic ratios of D/H and (18)O/(16)O in water and (13)C/(12)C, (18)O/(16)O, (17)O/(16)O, and (13)C(18)O/(12)C(16)O in carbon dioxide, made in the martian atmosphere at Gale Crater from the Curiosity rover using the Sample Analysis at Mars (SAM)'s tunable laser spectrometer (TLS). Comparison between our measurements in the modern atmosphere and those of martian meteorites such as ALH 84001 implies that the martian reservoirs of CO2 and H2O were largely established ~4 billion years ago, but that atmospheric loss or surface interaction may be still ongoing.

Published
2013
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