Evidence from Opportunity's microscopic imager for water on Meridiani Planum

被引:128
作者
Herkenhoff, KE [1 ]
Squyres, SW
Arvidson, R
Bass, DS
Bell, JF
Bertelsen, P
Ehlmann, BL
Farrand, W
Gaddis, L
Greeley, R
Grotzinger, J
Hayes, AG
Hviid, SF
Johnson, JR
Jolliff, B
Kinch, KM
Knoll, AH
Madsen, MB
Maki, JN
McLennan, SM
McSween, HY
Ming, DW
Rice, JW
Richter, L
Sims, M
Smith, PH
Soderblom, LA
Spanovich, N
Sullivan, R
Thompson, S
Wdowiak, T
Weitz, C
Whelley, P
机构
[1] US Geol Survey, Astrogeol Team, Flagstaff, AZ 86001 USA
[2] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
[3] Washington Univ, Dept Earth & Space Sci, St Louis, MO 63130 USA
[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[5] Univ Copenhagen, Ctr Planetary Sci, Danish Space Res Inst, DK-1168 Copenhagen, Denmark
[6] Univ Copenhagen, Niels Bohr Inst Astron Phys & Geophys, DK-1168 Copenhagen, Denmark
[7] Space Sci Inst, Boulder, CO 80301 USA
[8] Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA
[9] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA
[10] Max Planck Inst Aeron, D-37191 Katlenburg, Germany
[11] Aarhus Univ, Inst Phys & Astron, Aarhus, Denmark
[12] Harvard Univ, Dept Organism & Evolut Biol, Cambridge, MA 02138 USA
[13] SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA
[14] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA
[15] NASA, Lyndon B Johnson Space Ctr, Astromat Res & Explorat Sci Off, Houston, TX 77058 USA
[16] DLR Inst Raumsimulat, Cologne, Germany
[17] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
[18] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
[19] Univ Alabama Birmingham, Dept Phys, Birmingham, AL 35294 USA
[20] Planetary Sci Inst, Tucson, AZ 85719 USA
关键词
D O I
10.1126/science.1105286
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 Microscopic Imager on the Opportunity rover analyzed textures of soils and rocks at Meridiani Planum at a scale of 31 micrometers per pixel. The uppermost millimeter of some soils is weakly cemented, whereas other soils show little evidence of cohesion. Rock outcrops are laminated on a millimeter scale; image mosaics of cross-stratification suggest that some sediments were deposited by flowing water. Vugs in some outcrop faces are probably molds formed by dissolution of relatively soluble minerals during diagenesis. Microscopic images support the hypothesis that hematite-rich spherules observed in outcrops and soils also formed diagenetically as concretions.
引用
收藏
页码:1727 / 1730
页数:4
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