干旱区生态环境知识资源中心(Arid): Elemental Composition and Chemical Evolution of Geologic Materials in Gale Crater, Mars: APXS Results From Bradbury Landing to the Vera Rubin Ridge

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DOI	10.1029/2020JE006536
	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
ISSN	2169-9097
EISSN	2169-9100
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
推荐引用方式 GB/T 7714	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).