Chemical variations in Yellowknife Bay formation sedimentary rocks analyzed by ChemCam on board the Curiosity rover on Mars

被引：48

作者：

Mangold, N. ^{[1
]}

Forni, O. ^{[2
]}

Dromart, G. ^{[3
]}

Stack, K. ^{[4
]}

Wiens, R. C. ^{[5
]}

Gasnault, O. ^{[2
]}

Sumner, D. Y. ^{[6
]}

Nachon, M. ^{[1
]}

Meslin, P. -Y. ^{[2
]}

Anderson, R. B. ^{[7
]}

Barraclough, B. ^{[4
]}

Bell, J. F., III ^{[8
]}

Berger, G. ^{[2
]}

Blaney, D. L. ^{[9
]}

Bridges, J. C. ^{[10
]}

Calef, F. ^{[9
]}

Clark, B. ^{[11
]}

Clegg, S. M. ^{[5
]}

Cousin, A. ^{[5
]}

Edgar, L. ^{[8
]}

Edgett, K. ^{[12
]}

Ehlmann, B. ^{[4
]}

Fabre, C. ^{[13
]}

Fisk, M. ^{[14
]}

Grotzinger, J. ^{[4
]}

Gupta, S. ^{[15
]}

Herkenhoff, K. E. ^{[7
]}

Hurowitz, J. ^{[16
]}

Johnson, J. R. ^{[17
]}

Kah, L. C. ^{[18
]}

Lanza, N. ^{[19
]}

Lasue, J. ^{[2
]}

Le Mouelic, S. ^{[1
]}

Leveille, R. ^{[20
]}

Lewin, E. ^{[21
]}

Malin, M. ^{[12
]}

McLennan, S. ^{[16
]}

Maurice, S. ^{[2
]}

Melikechi, N. ^{[22
]}

Mezzacappa, A. ^{[22
]}

Milliken, R. ^{[23
]}

Newsom, H. ^{[19
]}

Ollila, A. ^{[19
]}

Rowland, S. K. ^{[24
]}

Sautter, V. ^{[25
]}

Schmidt, M. ^{[26
]}

Schroeder, S. ^{[2
]}

d'Uston, C. ^{[2
]}

Vaniman, D. ^{[27
]}

Williams, R. ^{[27
]}

机构：

[1] Univ Nantes, CNRS, Lab Planetol & Geodynam Nantes, Nantes, France

[2] Univ Toulouse, CNRS, UPS OMP, Inst Rech Astrophys & Planetol, Toulouse, France

[3] Univ Lyon, Lab Geol Lyon, Lyon, France

[4] CALTECH, Pasadena, CA 91125 USA

[5] Los Alamos Natl Lab, Los Alamos, NM USA

[6] Univ Calif Davis, Earth & Planetary Sci, Davis, CA 95616 USA

[7] US Geol Survey, Astrogeol Sci Ctr, Flagstaff, AZ 86001 USA

[8] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA

[9] CALTECH, Jet Prop Lab, Pasadena, CA USA

[10] Univ Leicester, Dept Phys & Astron, Space Res Ctr, Leicester LE1 7RH, Leics, England

[11] Space Sci Inst, Boulder, CO USA

[12] Malin Space Sci Syst, San Diego, CA USA

[13] Univ Lorraine, GeoRessources, Nancy, France

[14] Oragon State Univ, Earth Ocean & Atmospher Sci, Corvallis, OR USA

[15] Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, London, England

[16] SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA

[17] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[18] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN USA

[19] Univ New Mexico, Inst Meteorit, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA

[20] Canadian Space Agcy, St Hubert, PQ, Canada

[21] Univ Grenoble 1, ISTerre, Grenoble, France

[22] Delaware State Univ, Appl Opt Ctr, Delaware, OH USA

[23] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA

[24] Univ Hawaii Manoa, Dept Geol & Geophys, Honolulu, HI 96822 USA

[25] Museum Natl Hist Nat, F-75231 Paris, France

[26] Brock Univ, Dept Earth Sci, St Catharines, ON L2S 3A1, Canada

[27] Planetary Sci Inst, Tucson, AZ USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS | 2015年 / 120卷 / 03期

关键词：

Mars; Gale crater; sediments; ChemCam; LIBS; GALE CRATER; INSTRUMENT SUITE; VALLES-MARINERIS; MELAS-CHASMA; ORIGIN; SYSTEM; CHEMISTRY; RIVER; UNIT;

D O I：

10.1002/2014JE004681

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The Yellowknife Bay formation represents a similar to 5m thick stratigraphic section of lithified fluvial and lacustrine sediments analyzed by the Curiosity rover in Gale crater, Mars. Previous works have mainly focused on the mudstones that were drilled by the rover at two locations. The present study focuses on the sedimentary rocks stratigraphically above the mudstones by studying their chemical variations in parallel with rock textures. Results show that differences in composition correlate with textures and both manifest subtle but significant variations through the stratigraphic column. Though the chemistry of the sediments does not vary much in the lower part of the stratigraphy, the variations in alkali elements indicate variations in the source material and/or physical sorting, as shown by the identification of alkali feldspars. The sandstones contain similar relative proportions of hydrogen to the mudstones below, suggesting the presence of hydrous minerals that may have contributed to their cementation. Slight variations in magnesium correlate with changes in textures suggesting that diagenesis through cementation and dissolution modified the initial rock composition and texture simultaneously. The upper part of the stratigraphy (similar to 1m thick) displays rocks with different compositions suggesting a strong change in the depositional system. The presence of float rocks with similar compositions found along the rover traverse suggests that some of these outcrops extend further away in the nearby hummocky plains.

引用

页码：452 / 482

页数：31

共 7 条

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