The timing of alluvial activity in Gale crater, Mars

被引：93

作者：

Grant, John A. ^{[1
]}

Wilson, Sharon A. ^{[1
]}

Mangold, Nicolas ^{[2
]}

Calef, Fred, III ^{[3
]}

Grotzinger, John P. ^{[4
]}

机构：

[1] Smithsonian Inst, Natl Air & Space Museum, Ctr Earth & Planetary Studies, Washington, DC 20560 USA

[2] Univ Nantes, LPGN CNRS UMR6112, Lab Planetol & Geodynam Nantes, Nantes, France

[3] CALTECH, NASA Jet Prop Lab, Pasadena, CA 91125 USA

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

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 04期

关键词：

Mars; Gale crater; alluvial fan; craters; Hesperian; CONSTRAINTS; CHRONOLOGY; EVOLUTION; MOUND;

D O I：

10.1002/2013GL058909

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Curiosity rover's discovery of rocks preserving evidence of past habitable conditions in Gale crater highlights the importance of constraining the timing of responsible depositional settings to understand the astrobiological implications for Mars. Crater statistics and mapping reveal the bulk of the alluvial deposits in Gale, including those interrogated by Curiosity, were likely emplaced during the Hesperian, thereby implying that habitable conditions persisted after the Noachian. Crater counting data sets and upper Peace Vallis fan morphology also suggest a possible younger period of fluvial activation that deposited similar to 10-20m of sediments on the upper fan after emplacement of the main body of the fan. If validated, water associated with later alluvial activity may have contributed to secondary diagenetic features in Yellowknife Bay.

引用

页码：1142 / 1148

页数：7

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