Clay mineral diversity and abundance in sedimentary rocks of Gale crater, Mars

被引：177

作者：

Bristow, Thomas F. ^{[1
]}

Rampe, Elizabeth B. ^{[2
]}

Achilles, Cherie N. ^{[3
]}

Blake, David F. ^{[1
]}

Chipera, Steve J. ^{[4
]}

Craig, Patricia ^{[5
]}

Crisp, Joy A. ^{[6
]}

Des Marais, David J. ^{[1
]}

Downs, Robert T. ^{[3
]}

Gellert, Ralf ^{[7
]}

Grotzinger, John P. ^{[8
]}

Gupta, Sanjeev ^{[9
]}

Hazen, Robert M. ^{[10
]}

Horgan, Briony ^{[11
]}

Hogancamp, Joanna V. ^{[2
]}

Mangold, Nicolas ^{[12
]}

Mahaffy, Paul R. ^{[13
]}

McAdam, Amy C. ^{[13
]}

Ming, Doug W. ^{[2
]}

Morookian, John Michael

Morris, Richard V. ^{[2
]}

Morrison, Shaunna M. ^{[10
]}

Treimans, Allan H. ^{[5
]}

Vanimanm, David T. ^{[14
]}

Vasavada, Ashwin R. ^{[6
]}

Yen, Albert S. ^{[6
]}

机构：

[1] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[2] NASA, Johnson Space Ctr, Houston, TX 77058 USA

[3] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA

[4] Chesapeake Energy, Oklahoma City, OK 73154 USA

[5] Lunar & Planetary Inst, Houston, TX 77058 USA

[6] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[7] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[8] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA

[9] Imperial Coll London, Dept Earth Sci & Engn, London SW7 2AZ, England

[10] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[11] Purdue Univ, Earth Atmospher & Planetary Sci Dept, W Lafayette, IN 47907 USA

[12] Univ Angers, Univ Nantes, CNRS, Lab Planetol & Geodynam,UMR6112, Nantes, France

[13] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[14] Planetary Sci Inst, Tucson, AZ 85719 USA

来源：

SCIENCE ADVANCES | 2018年 / 4卷 / 06期

关键词：

X-RAY SPECTROMETER; CRYSTAL-CHEMISTRY; CALIBRATION; SMECTITES;

D O I：

10.1126/sciadv.aar3330

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Clay minerals provide indicators of the evolution of aqueous conditions and possible habitats for life on ancient Mars. Analyses by the Mars Science Laboratory rover Curiosity show that similar to 3.5-billion year (Ga) fluvio-lacustrine mudstones in Gale crater contain up to similar to 28 weight % (wt %) clay minerals. We demonstrate that the species of clay minerals deduced from x-ray diffraction and evolved gas analysis show a strong paleoenvironmental dependency. While perennial lake mudstones are characterized by Fe-saponite, we find that stratigraphic intervals associated with episodic lake drying contain Al-rich, Fe3+-bearing dioctahedral smectite, with minor (3 wt %) quantities of ferripyrophyllite, interpreted as wind-blown detritus, found in candidate aeolian deposits. Our results suggest that dioctahedral smectite formed via near-surface chemical weathering driven by fluctuations in lake level and atmospheric infiltration, a process leading to the redistribution of nutrients and potentially influencing the cycling of gases that help regulate climate.

引用

页数：8

共 42 条

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