Intense subaerial weathering of eolian sediments in Gale crater, Mars

被引：14
|
作者：
Liu, Jiacheng [1 ,2 ]
Michalski, Joseph R. [1 ,2 ]
Zhou, Mei-Fu [1 ,3 ]
机构：
[1] Univ Hong Kong, Res Div Earth & Planetary Sci, Hong Kong, Peoples R China
[2] Univ Hong Kong, Lab Space Res, Hong Kong, Peoples R China
[3] China Univ Geosci, Sch Earth Resources, Wuhan, Peoples R China
来源：
SCIENCE ADVANCES | 2021年 / 7卷 / 32期
关键词：
SMECTITE FORMATION; EVOLUTION; BASALT; ORIGIN; ROCKS; PALEOSOLS; CHEMISTRY; CLIMATE; SILICA; MOUND;
D O I：
10.1126/sciadv.abh2687
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：
After over 8 years of successful surface operations on Mars, the Curiosity rover has revealed much about the environment in Gale crater. Despite early observations of a lacustrine environment, few of the subsequent deposits exhibit demonstrable lacustrine character. We suggest instead that most of the stratigraphic section explored to date can be best explained as eolian and/or volcaniclastic sediments subaerially chemically weathered by acidic precipitation in a reduced atmosphere. Most of the deposits in Gale crater seemingly did not form in an ancient lake, but the results nonetheless shed considerable light on ancient climate, environmental change, and the astrobiology of Mars. Discoveries by Curiosity provide a critical piece to Mars' global alteration puzzle.
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页数：10
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