HiRISE imaging of impact megabreccia and sub-meter aqueous strata in Holden Crater, Mars

被引：94

作者：

Grant, John A. ^{[1
]}

Irwin, Rossman P., III ^{[1
]}

Grotzinger, John P. ^{[2
]}

Milliken, Ralph E. ^{[2
]}

Tornabene, Livio L. ^{[3
]}

McEwen, Alfred S. ^{[3
]}

Weitz, Catherine M. ^{[4
]}

Squyres, Steven W. ^{[5
]}

Glotch, Timothy D. ^{[6
]}

Thomson, Brad J. ^{[6
]}

机构：

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

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

[3] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[4] Planetary Sci Inst, Tucson, AZ 85719 USA

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

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

来源：

GEOLOGY | 2008年 / 36卷 / 03期

关键词：

Mars; stratigraphy; aqueous; megabreccia;

D O I：

10.1130/G24340A.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

High Resolution Imaging Science Experiment (HiRISE) images of Holden crater, Mars, resolve impact megabreccia unconformably overlain by sediments deposited during two Noachian-age phases of aqueous activity. A lighter-toned lower unit exhibiting phyllosilicates was deposited in a long-lived, quiescent distal alluvial or lacustrine setting. An overlying darker-toned and often blocky upper unit drapes the sequence and was emplaced during later high-magnitude flooding as an impounded Uzboi Vallis lake overtopped the crater rim. The stratigraphy provides the first geologic context for phyllosilicate deposition during persistent wet and perhaps habitable conditions on early Mars.

引用

页码：195 / 198

页数：4

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