Arid
DOI10.1029/2020JE006536
Elemental Composition and Chemical Evolution of Geologic Materials in Gale Crater, Mars: APXS Results From Bradbury Landing to the Vera Rubin Ridge
Berger, Jeff A.; Gellert, Ralf; Boyd, Nicholas I.; King, Penelope L.; McCraig, Michael A.; O'Connell-Cooper, Catherine D.; Schmidt, Mariek E.; Spray, John G.; Thompson, Lucy M.; VanBommel, Scott J. V.; Yen, Albert S.
通讯作者Berger, JA (corresponding author), Univ Guelph, Guelph, ON, Canada. ; Berger, JA (corresponding author), NASA, Johnson Space Ctr, Houston, TX 77058 USA.
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
ISSN2169-9097
EISSN2169-9100
出版年2020
卷号125期号:12
英文摘要The Alpha Particle X-ray Spectrometer (APXS) on the rover Curiosity has analyzed the composition of geologic materials along a >20-km traverse in Gale crater on Mars. The APXS dataset after 6.5 Earth years (2,301 sols) includes 712 analyses of soil, sand, float, bedrock, and drilled/scooped fines. We present the APXS results over this duration and provide stratigraphic context for each target. We identify the best APXS measurement of each of the 22 drilled and scooped samples that were delivered to the instruments Chemistry and Mineralogy (CheMin; X-ray diffractometer) and Sample Analysis at Mars (SAM; mass spectrometer and gas chromatograph) during this period. The APXS results demonstrate that the basaltic and alkali-rich units in the Bradbury group (sols 0-750) show minimal alteration indicating an arid climate. In contrast, the Murray formation of the Mount Sharp group (sols similar to 750-2,301) has compositions indicating pervasive alteration. Diagenetic features are common and show fluid interaction with the sediment after (and possibly during) lithification. A sandstone unit, the Stimson formation, overlies part of the Murray formation. This has a composition similar to the basaltic sand and soil, suggesting a shared source. Cross-cutting, fracture-associated haloes are evidence of late-stage fluid alteration after lithification of the sediment. The APXS dataset, evaluated in concert with the full science payload of Curiosity, indicates that Gale crater was habitable, and that liquid water was stable for extended periods.
英文关键词composition of the martian surface Gale crater Mars surface geochemistry MSL APXS
类型Article
语种英语
开放获取类型Green Submitted
收录类别SCI-E
WOS记录号WOS:000603663400022
WOS关键词X-RAY SPECTROMETER ; SEDIMENTARY-ROCKS ; CURIOSITY ROVER ; HYDROTHERMAL SYSTEMS ; MURRAY FORMATION ; PAHRUMP HILLS ; CHEMISTRY ; MINERALOGY ; CALIBRATION ; SOILS
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/369203
作者单位[Berger, Jeff A.; Gellert, Ralf; Boyd, Nicholas I.; McCraig, Michael A.] Univ Guelph, Guelph, ON, Canada; [Berger, Jeff A.] NASA, Johnson Space Ctr, Houston, TX 77058 USA; [King, Penelope L.] Australian Natl Univ, Canberra, ACT, Australia; [O'Connell-Cooper, Catherine D.; Spray, John G.; Thompson, Lucy M.] Univ New Brunswick, Fredericton, NB, Canada; [Schmidt, Mariek E.] Brock Univ, St Catharines, ON, Canada; [VanBommel, Scott J. V.] Washington Univ, St Louis, MO 63110 USA; [Yen, Albert S.] CALTECH, JPL, Pasadena, CA 91125 USA
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Berger, Jeff A.,Gellert, Ralf,Boyd, Nicholas I.,et al. Elemental Composition and Chemical Evolution of Geologic Materials in Gale Crater, Mars: APXS Results From Bradbury Landing to the Vera Rubin Ridge[J],2020,125(12).
APA Berger, Jeff A..,Gellert, Ralf.,Boyd, Nicholas I..,King, Penelope L..,McCraig, Michael A..,...&Yen, Albert S..(2020).Elemental Composition and Chemical Evolution of Geologic Materials in Gale Crater, Mars: APXS Results From Bradbury Landing to the Vera Rubin Ridge.JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,125(12).
MLA Berger, Jeff A.,et al."Elemental Composition and Chemical Evolution of Geologic Materials in Gale Crater, Mars: APXS Results From Bradbury Landing to the Vera Rubin Ridge".JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 125.12(2020).
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