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  Copper enrichments in the Kimberley formation in Gale crater, Mars: Evidence for a Cu deposit at the source

Payré, V., Fabre, C., Sautter, V., Cousin, A., Mangold, N., Le Deit, L., et al. (2019). Copper enrichments in the Kimberley formation in Gale crater, Mars: Evidence for a Cu deposit at the source. Icarus, 321, 736-751. doi:10.1016/j.icarus.2018.12.015.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-CA57-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-693D-1
Genre: Journal Article

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 Creators:
Payré, Valérie, Author
Fabre, Cécile, Author
Sautter, Violaine, Author
Cousin, Agnès, Author
Mangold, Nicolas, Author
Le Deit, Laetitia, Author
Forni, Olivier, Author
Goetz, Walter1, Author              
Wiens, Roger C., Author
Gasnault, Olivier, Author
Meslin, Pierre-Yves, Author
Lasue, Jérémie, Author
Rapin, William, Author
Clark, Ben, Author
Nachon, Marion, Author
Lanza, Nina L., Author
Maurice, Sylvestre, Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 Abstract: Copper quantification with laser induced breakdown spectroscopy (LIBS) using a univariate calibration model enables the ChemCam instrument onboard the Curiosity rover to measure unusually elevated Cu concentrations in potassic sandstones and Mn-oxide-bearing fracture fills in the Kimberley region of Gale crater, Mars. Mostly, the copper phases occurring in sedimentary bedrock are associated with detrital silicates, including feldspars, pyroxenes and K-phyllosilicates, likely coming from a potassic igneous source near the northern crater rim, while those present in the fractures are likely adsorbed on the surface of manganese oxides. These two different mineralogical associations imply at least two distinct processes: Cu enrichment in bedrock at the source, likely during crystallization of the igneous silicates, and adsorption of Cu on Mn-oxides precipitated from groundwater that encountered oxidizing conditions within fractures in the bedrock. The potassic sediments enriched in copper may be evidence of a porphyry copper deposit or an impact-induced hydrothermal deposit in the source region.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.icarus.2018.12.015
 Degree: -

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Title: Icarus
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: - Volume / Issue: 321 Sequence Number: - Start / End Page: 736 - 751 Identifier: ISSN: 0019-1035
CoNE: https://pure.mpg.de/cone/journals/resource/954922645023