In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars

被引：768

作者：

Squyres, SW ^{[1
]}

Grotzinger, JP

Arvidson, RE

Bell, JF

Calvin, W

Christensen, PR

Clark, BC

Crisp, JA

Farrand, WH

Herkenhoff, KE

Johnson, JR

Klingelhöfer, G

Knoll, AH

McLennan, SM

McSween, HY

Morris, RV

Rice, JW

Rieder, R

Soderblom, LA

机构：

[1] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[2] MIT, Dept Earth Atrmospher & Planetary Sci, Cambridge, MA 02139 USA

[3] Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63031 USA

[4] Univ Nevada, Dept Geol Sci, Reno, NV 89557 USA

[5] Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA

[6] Lockheed Martin Corp, Littleton, CO 80127 USA

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

[8] Space Sci Inst, Boulder, CO 80301 USA

[9] US Geol Survey, Flagstaff, AZ 86001 USA

[10] Johannes Gutenberg Univ Mainz, D-55128 Mainz, Germany

[11] Harvard Univ, Bot Museum, Cambridge, MA 02138 USA

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

[13] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA

[14] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA

[15] Max Planck Inst Chem, D-55128 Mainz, Germany

来源：

SCIENCE | 2004年 / 306卷 / 5702期

关键词：

D O I：

10.1126/science.1104559

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：

Sedimentary rocks at Eagle crater in Meridiani Planum are composed of fine-grained siliciclastic materials derived from weathering of basaltic rocks, sulfate minerals (including magnesium sulfate and jarosite) that constitute several tens of percent of the rock by weight, and hematite. Cross-stratification observed in rock outcrops indicates eolian and aqueous transport. Diagenetic features include hematite-rich concretions and crystal-mold vugs. We interpret the rocks to be a mixture of chemical and siliciciastic sediments with a complex diagenetic history. The environmental conditions that they record include episodic inundation by shallow surface water, evaporation, and desiccation. The geologic record at Meridiani Planum suggests that conditions were suitable for biological activity for a period of time in martian history.

引用

页码：1709 / 1714

页数：6

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