Identifying Shocked Feldspar on Mars Using Perseverance Spectroscopic Instruments : Implications for Geochronology Studies on Returned Samples

Shkolyar, S.Universities Space Research Association (USRA),NASA Goddard Space Flight Center,Blue Marble Space Institute of Science (author)

The Perseverance rover (Mars 2020) mission, the first step in NASA’s Mars Sample Return (MSR) program, will select samples for caching based on their potential to improve understanding Mars’ astrobiological, geological, geochemical, and climatic evolution. Geochronologic analyses will be among the key measurements planned for returned samples. Assessing a sample’s shock history will be critical because shock metamorphism could influence apparent sample age. Shock effects in one Mars-relevant mineral class, plagioclase feldspar, have been well-documented using various spectroscopy techniques (thermal infrared reflectance, emission, and transmission spectroscopy, Raman, and luminescence). A subset of these data will be obtained with the SuperCam and SHERLOC (Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals) instruments onboard Perseverance to inform caching decisions for MSR. Here, we review shock indicators in plagioclase feldspar as revealed in Raman, luminescence, and IR spectroscopy lab data, with an emphasis on Raman spectroscopy. We consider how this information may inform caching decisions for selecting optimal samples for geochronology measurements. We then identify challenges and make recommendations for both in situ measurements performed with SuperCam and SHERLOC and for supporting lab studies to enhance the success of geochronologic analyses after return to Earth.

Jaret, S. J.American Museum of Natural History (author)
Cohen, B. A.NASA Goddard Space Flight Center (author)
Johnson, J. R.Johns Hopkins University (author)
Beyssac, O.The French National Centre for Scientific Research (CNRS) (author)
Madariaga, J. M.University of the Basque Country (author)
Wiens, R. C.Los Alamos National Laboratory (author)
Ollila, A.Los Alamos National Laboratory (author)
Holm-Alwmark, S.Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science,Niels Bohr Institute,Natural History Museum of Denmark(Swepub:lu)geol-shl (author)
Liu, Y.California Institute of Technology (author)
Universities Space Research Association (USRA)NASA Goddard Space Flight Center (creator_code:org_t)

In:Earth, Moon and Planets: Springer Science and Business Media LLC126:20167-92951573-0794

By the author/editor: Shkolyar, S.; Jaret, S. J.; Cohen, B. A.; Johnson, J. R.; Beyssac, O.; Madariaga, J. M.; show more...; Wiens, R. C.; Ollila, A.; Holm-Alwmark, S.; Liu, Y.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.