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http://hdl.handle.net/1893/17171
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DC Field | Value | Language |
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dc.contributor.author | Wang, Alian | en_UK |
dc.contributor.author | Haskin, Larry A | en_UK |
dc.contributor.author | Squyres, Steven W | en_UK |
dc.contributor.author | Jolliff, Bradley L | en_UK |
dc.contributor.author | Crumpler, Larry S | en_UK |
dc.contributor.author | Gellert, Ralf | en_UK |
dc.contributor.author | Schröder, Christian | en_UK |
dc.contributor.author | Herkenhoff, Kenneth E | en_UK |
dc.contributor.author | Hurowitz, Joel A | en_UK |
dc.contributor.author | Tosca, Nicholas J | en_UK |
dc.contributor.author | Farrand, William H | en_UK |
dc.contributor.author | Anderson, Robert C | en_UK |
dc.contributor.author | Knudson, Amy T | en_UK |
dc.date.accessioned | 2013-11-01T00:09:43Z | - |
dc.date.available | 2013-11-01T00:09:43Z | - |
dc.date.issued | 2006-02-21 | en_UK |
dc.identifier.uri | http://hdl.handle.net/1893/17171 | - |
dc.description.abstract | Excavating into the shallow Martian subsurface has the potential to expose stratigraphic layers and mature regolith, which may hold a record of more ancient aqueous interactions than those expected under current Martian surface conditions. During the Spirit rover’s exploration of Gusev crater, rover wheels were used to dig three trenches into the subsurface regolith down to 6–11 cm depth: Road Cut, the Big Hole, and The Boroughs. A high oxidation state of Fe and high concentrations of Mg, S, Cl, and Br were found in the subsurface regolith within the two trenches on the plains, between the Bonneville crater and the foot of Columbia Hills. Data analyses on the basis of geochemistry and mineralogy observations suggest the deposition of sulfate minerals within the subsurface regolith, mainly Mg-sulfates accompanied by minor Ca-sulfates and perhaps Fe-sulfates. An increase of Fe2O3, an excess of SiO2, and a minor decrease in the olivine proportion relative to surface materials are also inferred. Three hypotheses are proposed to explain the geochemical trends observed in trenches: (1) multiple episodes of acidic fluid infiltration, accompanied by in situ interaction with igneous minerals and salt deposition; (2) an open hydrologic system characterized by ion transportation in the fluid, subsequent evaporation of the fluid, and salt deposition; and (3) emplacement and mixing of impact ejecta of variable composition. While all three may have plausibly contributed to the current state of the subsurface regolith, the geochemical data are most consistent with ion transportation by fluids and salt deposition as a result of open-system hydrologic behavior. Although sulfates make up >20 wt.% of the regolith in the wall of The Boroughs trench, a higher hydrated sulfate than kieserite within The Boroughs or a greater abundance of sulfates elsewhere than is seen in The Boroughs wall regolith would be needed to hold the structural water indicated by the water-equivalent hydrogen concentration observed by the Gamma-Ray Spectrometer on Odyssey in the Gusev region. | en_UK |
dc.language.iso | en | en_UK |
dc.publisher | American Geophysical Union | en_UK |
dc.relation | Wang A, Haskin LA, Squyres SW, Jolliff BL, Crumpler LS, Gellert R, Schröder C, Herkenhoff KE, Hurowitz JA, Tosca NJ, Farrand WH, Anderson RC & Knudson AT (2006) Sulfate deposition in subsurface regolith in Gusev crater, Mars. Journal of Geophysical Research: Planets, 111 (E2). https://doi.org/10.1029/2005JE002513 | en_UK |
dc.rights | Copyright 2006 by the American Geophysical Union. AGU allows authors to deposit their journal articles if the version is the final published citable version of record, the AGU copyright statement is clearly visible on the posting, and the posting is made 6 months after official publication by the AGU. | en_UK |
dc.subject | Gusev | en_UK |
dc.subject | Mars | en_UK |
dc.subject | sulfate | en_UK |
dc.title | Sulfate deposition in subsurface regolith in Gusev crater, Mars | en_UK |
dc.type | Journal Article | en_UK |
dc.identifier.doi | 10.1029/2005JE002513 | en_UK |
dc.citation.jtitle | Journal of Geophysical Research: Planets | en_UK |
dc.citation.issn | 2169-9100 | en_UK |
dc.citation.issn | 2169-9097 | en_UK |
dc.citation.volume | 111 | en_UK |
dc.citation.issue | E2 | en_UK |
dc.citation.publicationstatus | Published | en_UK |
dc.citation.peerreviewed | Refereed | en_UK |
dc.type.status | VoR - Version of Record | en_UK |
dc.author.email | christian.schroeder@stir.ac.uk | en_UK |
dc.contributor.affiliation | Washington University In Saint Louis | en_UK |
dc.contributor.affiliation | Washington University In Saint Louis | en_UK |
dc.contributor.affiliation | Cornell University | en_UK |
dc.contributor.affiliation | Washington University In Saint Louis | en_UK |
dc.contributor.affiliation | New Mexico Museum of Natural History and Science | en_UK |
dc.contributor.affiliation | Max Planck Institute of Chemistry | en_UK |
dc.contributor.affiliation | Biological and Environmental Sciences | en_UK |
dc.contributor.affiliation | U.S. Geological Survey | en_UK |
dc.contributor.affiliation | California Institute of Technology | en_UK |
dc.contributor.affiliation | State University of New York At Stony Brook | en_UK |
dc.contributor.affiliation | Space Science Institute | en_UK |
dc.contributor.affiliation | California Institute of Technology | en_UK |
dc.contributor.affiliation | Arizona State University | en_UK |
dc.identifier.isi | WOS:000235967900001 | en_UK |
dc.identifier.scopusid | 2-s2.0-33645647617 | en_UK |
dc.identifier.wtid | 682347 | en_UK |
dc.contributor.orcid | 0000-0002-7935-6039 | en_UK |
dcterms.dateAccepted | 2006-02-21 | en_UK |
dc.date.filedepositdate | 2013-10-28 | en_UK |
rioxxterms.type | Journal Article/Review | en_UK |
rioxxterms.version | VoR | en_UK |
local.rioxx.author | Wang, Alian| | en_UK |
local.rioxx.author | Haskin, Larry A| | en_UK |
local.rioxx.author | Squyres, Steven W| | en_UK |
local.rioxx.author | Jolliff, Bradley L| | en_UK |
local.rioxx.author | Crumpler, Larry S| | en_UK |
local.rioxx.author | Gellert, Ralf| | en_UK |
local.rioxx.author | Schröder, Christian|0000-0002-7935-6039 | en_UK |
local.rioxx.author | Herkenhoff, Kenneth E| | en_UK |
local.rioxx.author | Hurowitz, Joel A| | en_UK |
local.rioxx.author | Tosca, Nicholas J| | en_UK |
local.rioxx.author | Farrand, William H| | en_UK |
local.rioxx.author | Anderson, Robert C| | en_UK |
local.rioxx.author | Knudson, Amy T| | en_UK |
local.rioxx.project | Internal Project|University of Stirling|https://isni.org/isni/0000000122484331 | en_UK |
local.rioxx.freetoreaddate | 2013-10-28 | en_UK |
local.rioxx.licence | http://www.rioxx.net/licenses/all-rights-reserved|2013-10-28| | en_UK |
local.rioxx.filename | WangSulfateJGR_02_06.pdf | en_UK |
local.rioxx.filecount | 1 | en_UK |
local.rioxx.source | 2169-9097 | en_UK |
Appears in Collections: | Biological and Environmental Sciences Journal Articles |
Files in This Item:
File | Description | Size | Format | |
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WangSulfateJGR_02_06.pdf | Fulltext - Published Version | 15.05 MB | Adobe PDF | View/Open |
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