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Ancient impact and aqueous processes at Endeavour Crater, Mars


Squyres, SW and Arvidson, RE and Bell, JF and Calef, F and Clark, BC and Cohen, BA and Crumpler, LA and de Souza Jr, PA and Farrand, WH and Gellert, R and Grant, J and Herkenhoff, KE and Hurowitz, JA and Johnson, JR and Jolliff, BL and Knoll, AH and Li, R and McLennan, SM and Ming, DW and Mittlefehldt, DW and Parker, TJ and Paulsen, G and Rice, MS and Ruff, SW and Schroder, C and Yen, AS and Zacny, K, Ancient impact and aqueous processes at Endeavour Crater, Mars, Science, 336, (6081) pp. 570-576. ISSN 0036-8075 (2012) [Refereed Article]

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Copyright Statement

Copyright 2012 American Association for the Advancement of Science

DOI: doi:10.1126/science.1220476


The rover Opportunity has investigated the rim of Endeavour Crater, a large ancient impact crater on Mars. Basaltic breccias produced by the impact form the rim deposits, with stratigraphy similar to that observed at similar-sized craters on Earth. Highly localized zinc enrichments in some breccia materials suggest hydrothermal alteration of rim deposits. Gypsum-rich veins cut sedimentary rocks adjacent to the crater rim. The gypsum was precipitated from low-temperature aqueous fluids flowing upward from the ancient materials of the rim, leading temporarily to potentially habitable conditions and providing some of the waters involved in formation of the ubiquitous sulfate-rich sandstones of the Meridiani region.

Item Details

Item Type:Refereed Article
Keywords:calcium sulfate, aqueous solution, basalt, breccia, crater, enrichment; gypsum, hydrothermal alteration, Mars, precipitation (chemistry), sandstone, sedimentary rock, spacecraft, stratigraphy, vein (geology), water, zinc
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Exploration geochemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:de Souza Jr, PA (Professor Paulo de Souza Junior)
ID Code:77607
Year Published:2012
Web of Science® Times Cited:151
Deposited By:Information and Communication Technology
Deposited On:2012-05-10
Last Modified:2017-10-30
Downloads:2 View Download Statistics

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