Schwenzer, S. P.; Abramov, O.; Allen, C. C.; Bridges, J. C.; Clifford, S. M.; Filiberto, J.; Kring, D. A.; Lasue, J.; McGovern, P. J.; Newsom, H. E; Treiman, A. H.; Vaniman , D. T.; Wiens, R. C. and Wittmann, A.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1016/j.pss.2012.05.014|
|Google Scholar:||Look up in Google Scholar|
Gale Crater, the landing site of the 2011 Mars Science Laboratory mission, formed in the Late Noachian. It is a 150 km diameter complex impact structure with a central mound (Mount Sharp), the original features of which may be transitional between a central peak and peak ring impact structure. The impact might have melted portions of the substrate to a maximum depth of ~17 km and produced a minimum of 3600 km3 of impact melt, half of which likely remained within the crater. The bulk of this impact melt would have pooled in an annular depression surrounding the central uplift, creating an impact melt pool as thick as 0.5–1km. The ejecta blanket surrounding Gale may have been as thick as ~600 m, which has implications for the amount of erosion that has occurred since Gale Crater formed. After the impact, a hydrothermal system may have been active for several hundred thousand years and a crater lake with associated sediments is likely to have formed. The hydrothermal system, and associated lakes and springs, likely caused mineral alteration and precipitation. In the presence of S-rich host rocks, the alteration phases are modelled to contain sheet silicates, quartz, sulphates, and sulphides. Modelled alteration assemblages may be more complex if groundwater interaction persisted after initial alteration. The warm-water environment might have provided conditions supportive of life. Deep fractures would have allowed for hydraulic connectivity into the deep subsurface, where biotic chemistry(and possibly other evidence of life)may be preserved.
|Item Type:||Journal Article|
|Copyright Holders:||2012 Elsevier Ltd|
|Project Funding Details:||
|Keywords:||Mars; Gale Crater; Mars Science Laboratory; impact crater; hydrothermal system; post-impact lake; habitability|
|Academic Unit/Department:||Science > Physical Sciences|
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Susanne Schwenzer|
|Date Deposited:||06 Aug 2012 08:53|
|Last Modified:||16 Nov 2012 12:27|
|Share this page:|
Actions (login may be required)
|Report issue / request change|