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2. Lunar Volatiles and Solar System Science

Author

Prem, Parvathy, Kereszturi, Ákos, Deutsch, Ariel N., Hibbitts, Charles A., Schmidt, Carl A., Grava, Cesare, Honniball, Casey I., Hardgrove, Craig J., Pieters, Carlé M., Goldstein, David B., Barker, Donald C., Needham, Debra H., Hurley, Dana M., Mazarico, Erwan, Dominguez, Gerardo, Patterson, G. Wesley, Kramer, Georgiana Y., Brisset, Julie, Gillis-Davis, Jeffrey J., Mitchell, Julie L., Szalay, Jamey R., Halekas, Jasper S., Keane, James T., Head, James W., Mandt, Kathleen E., Robinson, Katharine L., Luchsinger, Kristen M., Magaña, Lizeth O., Siegler, Matthew A., Landis, Margaret E., Poston, Michael J., Petro, Noah E., Lucey, Paul G., Killen, Rosemary M., Li, Shuai, Narendranath, Shyama, Shukla, Shashwat, Barrett, Thomas J., Stubbs, Timothy J., Orlando, Thomas M., and Farrell, William M.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Earth and Planetary Astrophysics
Abstract

Understanding the origin and evolution of the lunar volatile system is not only compelling lunar science, but also fundamental Solar System science. This white paper (submitted to the US National Academies' Decadal Survey in Planetary Science and Astrobiology 2023-2032) summarizes recent advances in our understanding of lunar volatiles, identifies outstanding questions for the next decade, and discusses key steps required to address these questions.

Published
2020

5. Titanium-in-Quartz Geothermometry of Impactites and Peak-Ring Lithologies from the Chicxulub Impact Crater

Author

Schmieder, Martin, Ross, D. Kent, Robinson, Katharine L, and Kring, David A

Subjects
Geophysics
Abstract

Since its development by Wark and Watson (2006), the Ti-in-quartz geothermometer (TitaniQ) has been continuously refined and applied to a variety of lithologies from different crustal settings. Assuming quartz crystallized and incorporated Ti under equilibrium conditions and providing TiO2 activity (alpha (sub TiO2)) is reasonably constrained, crystallization temperatures at typical crustal pressures can be calculated. In turn, when crystallization temperatures are independently constrained, Ti-in-quartz can be used as a geobarometer. Here we explore the application of this technique to impact lithologies. Quartz is ubiquitous in terrestrial impact structures in upper crustal settings and can also form as a post-impact hydrothermal mineral. Together with other geothermometers, such as Ti-in-zircon, Ti-in-quartz can potentially help constrain the temperature-pressure conditions during the formation of the pre-impact target rock at terrestrial impact structures, as well as impact-produced and hydrothermally-altered lithologies. This work presents the first systematic Ti-in-quartz study of impactites and granitoid target rocks from the approximately180-kilometer-diameter, end-Cretaceous Chicxulub crater on the Yucatan Peninsula, Mexico, thereby placing new constraints on the emplacement of felsic plutons within the Maya Block in the Paleozoic, impact melt crystallization at approximately 66 Ma (million years ago), and post-impact hydrothermal overprint inside the Chicxulub crater.

Published
2019

6. Lunar Volatiles and Solar System Science

Author

Prem, Parvathy, primary, Kereszturi, Ákos, additional, Deutsch, Ariel N., additional, Hibbitts, Charles A., additional, Schmidt, Carl A., additional, Grava, Cesare, additional, Honniball, Casey I., additional, Hardgrove, Craig J., additional, Pieters, Carlé M., additional, Goldstein, David B., additional, Barker, Donald C., additional, Needham, Debra H., additional, Hurley, Dana M., additional, Mazarico, Erwan, additional, Dominguez, Gerardo, additional, Patterson, G. Wesley, additional, Kramer, Georgiana Y., additional, Brisset, Julie, additional, Gillis-Davis, Jeffrey J., additional, Mitchell, Julie L., additional, Szalay, Jamey R., additional, Halekas, Jasper S., additional, Keane, James T., additional, Head, James W., additional, Mandt, Kathleen E., additional, Robinson, Katharine L., additional, Luchsinger, Kristen M., additional, Magaña, Lizeth O., additional, Siegler, Matthew A., additional, Landis, Margaret E., additional, Poston, Michael J., additional, Petro, Noah E., additional, Lucey, Paul G., additional, Killen, Rosemary M., additional, Li, Shuai, additional, Narendranath, Shyama, additional, Shukla, Shashwat, additional, Barrett, Thomas J., additional, Stubbs, Timothy J., additional, Orlando, Thomas M., additional, and Farrell, William M., additional

Published
2021
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10. Water in evolved lunar rocks: Evidence for multiple reservoirs

Author

Robinson, Katharine L., Barnes, Jessica J., Nagashima, Kazuhide, Thomen, Aurélien, Franchi, Ian A., Huss, Gary R., Anand, Mahesh, Taylor, G.Jeffrey, Robinson, Katharine L., Barnes, Jessica J., Nagashima, Kazuhide, Thomen, Aurélien, Franchi, Ian A., Huss, Gary R., Anand, Mahesh, and Taylor, G.Jeffrey

Abstract

We have measured the abundance and isotopic composition of water in apatites from several lunar rocks representing Potassium (K), Rare Earth Elements (REE), and Phosphorus (P) − KREEP − rich lithologies, including felsites, quartz monzodiorites (QMDs), a troctolite, and an alkali anorthosite. The H-isotope data from apatite provide evidence for multiple reservoirs in the lunar interior. Apatite measurements from some KREEP-rich intrusive rocks display moderately elevated δD signatures, while other samples show δD signatures similar to the range known for the terrestrial upper mantle. Apatite grains in Apollo 15 quartz monzodiorites have the lowest δD values measured from the Moon so far (as low as −749‰), and could potentially represent a D-depleted reservoir in the lunar interior that had not been identified until now. Apatite in all of these intrusive rocks contains <267 ppm H2O, which is relatively low compared to apatites from the majority of studied mare basalts (200 to >6500 ppm H2O). Complexities in partitioning of volatiles into apatite make this comparison uncertain, but measurements of residual glass in KREEP basalt fragments in breccia 15358 independently show that the KREEP basaltic magmas were low in water. The source of 15358 contained ∼10 ppm H2O, about an order of magnitude lower than the source of the Apollo 17 pyroclastic glass beads, suggesting potential variations in the distribution of water in the lunar interior.

11. Lunar Volatiles and Solar System Science

Author

Prem, Parvathy, Kereszturi, Ákos, Deutsch, Ariel N., Hibbitts, Charles A., Schmidt, Carl A., Grava, Cesare, Honniball, Casey I., Hardgrove, Craig J., Pieters, Carlé M., Goldstein, David B., Barker, Donald C., Needham, Debra H., Hurley, Dana M., Mazarico, Erwan, Dominguez, Gerardo, Patterson, G. Wesley, Kramer, Georgiana Y., Brisset, Julie, Gillis-Davis, Jeffrey J., Mitchell, Julie L., Szalay, Jamey R., Halekas, Jasper S., Keane, James T., Head, James W., Mandt, Kathleen E., Robinson, Katharine L., Luchsinger, Kristen M., Magaña, Lizeth O., Siegler, Matthew A., Landis, Margaret E., Poston, Michael J., Petro, Noah E., Lucey, Paul G., Killen, Rosemary M., Li, Shuai, Narendranath, Shyama, Shukla, Shashwat, Barrett, Thomas, Stubbs, Timothy J., Orlando, Thomas M., Farrell, William M., Prem, Parvathy, Kereszturi, Ákos, Deutsch, Ariel N., Hibbitts, Charles A., Schmidt, Carl A., Grava, Cesare, Honniball, Casey I., Hardgrove, Craig J., Pieters, Carlé M., Goldstein, David B., Barker, Donald C., Needham, Debra H., Hurley, Dana M., Mazarico, Erwan, Dominguez, Gerardo, Patterson, G. Wesley, Kramer, Georgiana Y., Brisset, Julie, Gillis-Davis, Jeffrey J., Mitchell, Julie L., Szalay, Jamey R., Halekas, Jasper S., Keane, James T., Head, James W., Mandt, Kathleen E., Robinson, Katharine L., Luchsinger, Kristen M., Magaña, Lizeth O., Siegler, Matthew A., Landis, Margaret E., Poston, Michael J., Petro, Noah E., Lucey, Paul G., Killen, Rosemary M., Li, Shuai, Narendranath, Shyama, Shukla, Shashwat, Barrett, Thomas, Stubbs, Timothy J., Orlando, Thomas M., and Farrell, William M.

12. Lunar Volatiles and Solar System Science

Author

Prem, Parvathy, Kereszturi, Ákos, Deutsch, Ariel N., Hibbitts, Charles A., Schmidt, Carl A., Grava, Cesare, Honniball, Casey I., Hardgrove, Craig J., Pieters, Carlé M., Goldstein, David B., Barker, Donald C., Needham, Debra H., Hurley, Dana M., Mazarico, Erwan, Dominguez, Gerardo, Patterson, G. Wesley, Kramer, Georgiana Y., Brisset, Julie, Gillis-Davis, Jeffrey J., Mitchell, Julie L., Szalay, Jamey R., Halekas, Jasper S., Keane, James T., Head, James W., Mandt, Kathleen E., Robinson, Katharine L., Luchsinger, Kristen M., Magaña, Lizeth O., Siegler, Matthew A., Landis, Margaret E., Poston, Michael J., Petro, Noah E., Lucey, Paul G., Killen, Rosemary M., Li, Shuai, Narendranath, Shyama, Shukla, Shashwat, Barrett, Thomas, Stubbs, Timothy J., Orlando, Thomas M., Farrell, William M., Prem, Parvathy, Kereszturi, Ákos, Deutsch, Ariel N., Hibbitts, Charles A., Schmidt, Carl A., Grava, Cesare, Honniball, Casey I., Hardgrove, Craig J., Pieters, Carlé M., Goldstein, David B., Barker, Donald C., Needham, Debra H., Hurley, Dana M., Mazarico, Erwan, Dominguez, Gerardo, Patterson, G. Wesley, Kramer, Georgiana Y., Brisset, Julie, Gillis-Davis, Jeffrey J., Mitchell, Julie L., Szalay, Jamey R., Halekas, Jasper S., Keane, James T., Head, James W., Mandt, Kathleen E., Robinson, Katharine L., Luchsinger, Kristen M., Magaña, Lizeth O., Siegler, Matthew A., Landis, Margaret E., Poston, Michael J., Petro, Noah E., Lucey, Paul G., Killen, Rosemary M., Li, Shuai, Narendranath, Shyama, Shukla, Shashwat, Barrett, Thomas, Stubbs, Timothy J., Orlando, Thomas M., and Farrell, William M.

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