Soils of eagle crater and Meridiani Planum at the Opportunity Rover landing site

被引:125
作者
Soderblom, LA [1 ]
Anderson, RC
Arvidson, RE
Bell, JF
Cabrol, NA
Calvin, W
Christensen, PR
Clark, BC
Economou, T
Ehlmann, BL
Farrand, WH
Fike, D
Gellert, R
Glotch, TD
Golombek, MP
Greeley, R
Grotzinger, JP
Herkenhoff, KE
Jerolmack, DJ
Johnson, JR
Jolliff, B
Klingelhöfer, G
Knoll, AH
Learner, ZA
Li, R
Malin, MC
McLennan, SM
McSween, HY
Ming, DW
Morris, RV
Rice, JW
Richter, L
Rieder, R
Rodionov, D
Schröder, C
Seelos, FP
Soderblom, JM
Squyres, SW
Sullivan, R
Watters, WA
Weitz, CM
Wyatt, MB
Yen, A
Zipfel, J
机构
[1] US Geol Survey, Flagstaff, AZ 86001 USA
[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[3] Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA
[4] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
[5] NASA, Ames SETI Inst, Moffett Field, CA 94035 USA
[6] Univ Nevada, Reno, NV 89557 USA
[7] Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA
[8] Lockheed Martin Corp, Littleton, CO 80127 USA
[9] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[10] Space Sci Inst, Boulder, CO 80301 USA
[11] MIT, Cambridge, MA 02139 USA
[12] Max Planck Inst Chem, D-55128 Mainz, Germany
[13] Johannes Gutenberg Univ Mainz, D-55128 Mainz, Germany
[14] Harvard Univ, Bot Museum, Cambridge, MA 02138 USA
[15] Ohio State Univ, Dept Civil & Environm Engn & Geodet Sci, Columbus, OH 43210 USA
[16] Malin Space Sci Syst, San Diego, CA 92191 USA
[17] SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA
[18] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA
[19] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA
[20] DLR Inst Space Simulat, D-51147 Cologne, Germany
[21] Planetary Sci Inst, Tucson, AZ 85719 USA
关键词
D O I
10.1126/science.1105127
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
The soils at the Opportunity site are fine-grained basaltic sands mixed with dust and sulfate-rich outcrop debris. Hematite is concentrated in spherules eroded from the strata. Ongoing saltation exhumes the spherules and their fragments, concentrating them at the surface. Spherules emerge from soils coated, perhaps from subsurface cementation, by salts. Two types of vesicular clasts may represent basaltic sand sources. Eolian ripples, armored by well-sorted hematite-rich grains, pervade Meridiani Planum. The thickness of the soil on the plain is estimated to be about a meter. The flatness and thin cover suggest that the plain may represent the original sedimentary surface.
引用
收藏
页码:1723 / 1726
页数:4
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