Aqueous alteration processes in Jezero crater, Mars-implications for organic geochemistry.

Eva L Scheller,Joseph Razzell Hollis,Emily L Cardarelli,Andrew Steele,Luther W Beegle,Rohit Bhartia,Pamela Conrad,Kyle Uckert,Sunanda Sharma,Bethany L Ehlmann,William J Abbey,Sanford A Asher,Kathleen C Benison,Eve L Berger,Olivier Beyssac,Benjamin L Bleefeld,Tanja Bosak,Adrian J Brown,Aaron S Burton,Sergei V Bykov,Ed Cloutis,Alberto G Fairén,Lauren DeFlores,Kenneth A Farley,Deidra M Fey,Teresa Fornaro,Allison C Fox,Marc Fries,Keyron Hickman-Lewis,William F Hug,Joshua E Huggett, Samara Imbeah,Ryan S Jakubek,Linda C Kah,Peter Kelemen,Megan R Kennedy,Tanya Kizovski,Carina Lee,Yang Liu,Lucia Mandon,Francis M McCubbin,Kelsey R Moore, Brian E Nixon,Jorge I Núñez,Carolina Rodriguez Sanchez-Vahamonde,Ryan D Roppel,Mitchell Schulte,Mark A Sephton,Shiv K Sharma,Sandra Siljeström,Svetlana Shkolyar,David L Shuster,Justin I Simon,Rebecca J Smith,Kathryn M Stack,Kim Steadman,Benjamin P Weiss, Alyssa Werynski,Amy J Williams,Roger C Wiens,Kenneth H Williford, Kathrine Winchell,Brittan Wogsland,Anastasia Yanchilina,Rachel Yingling,Maria-Paz Zorzano

Science (New York, N.Y.)（2022）

Cited 35|Views55

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Abstract

The Perseverance rover landed in Jezero crater, Mars in February 2021. We used the Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) instrument to perform deep ultraviolet Raman and fluorescence spectroscopy of three rocks within the crater. We identify evidence for two distinct ancient aqueous environments at different times. Reactions with liquid water formed carbonates in an olivine-rich igneous rock. A sulfate-perchlorate mixture is present in the rocks, probably formed by later modifications of the rocks by brine. Fluorescence signatures consistent with aromatic organic compounds occur throughout these rocks, preserved in minerals related to both aqueous environments.

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Key words

jezero crater,aqueous alteration processes,mars—implications

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