globalchange  > 气候减缓与适应
DOI: 10.1029/2018JE005635
Scopus记录号: 2-s2.0-85049850757
论文题名:
Shergottite Northwest Africa 6963: A Pyroxene-Cumulate Martian Gabbro
作者: Filiberto J.; Gross J.; Udry A.; Trela J.; Wittmann A.; Cannon K.M.; Penniston-Dorland S.; Ash R.; Hamilton V.E.; Meado A.L.; Carpenter P.; Jolliff B.; Ferré E.C.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期:7
起始页码: 1823
结束页码: 1841
语种: 英语
英文关键词: Geochemistry ; Martian meteorite ; NWA6963 ; Petrology ; shergottite ; Spectroscopy
英文摘要: Northwest Africa (NWA) 6963 was found in Guelmim-Es-Semara, Morocco, and based on its bulk chemistry and oxygen isotopes, it was classified as a Martian meteorite. On the basis of a preliminary study of the textures and crystal sizes, it was resubclassified as a gabbroic shergottite because of the similarity with terrestrial and lunar gabbros. However, the previous work was not a quantitative investigation of NWA 6963; to supplement the original resubclassification and enable full comparison between this and other Martian samples; here we investigate the mineralogy, petrology, geochemistry, quantitative textural analyses, and spectral properties of gabbroic shergottite NWA 6963 to constrain its petrogenesis, including the depth of emplacement (i.e., base of a flow versus crustal intrusion). NWA 6963 is an enriched shergottite with similar mineralogy to the basaltic shergottites but importantly does not contain any fine-grained mesostasis. Consistent with the mineralogy, the reflectance (visible/near-infrared and thermal infrared) spectrum of powdered NWA 6963 is similar to other shergottites because they are all dominated by pyroxene, but its reflectance is distinct in terms of albedo and spectral contrast due to its gabbroic texture. NWA 6963 represents a partial cumulate gabbro that is associated with the basaltic shergottites. Therefore, NWA 6963 could represent a hypabyssal intrusive feeder dike system for the basaltic shergottites that erupted on the surface. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113587
Appears in Collections:气候减缓与适应

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作者单位: Department of Geology, Southern Illinois University, Carbondale, IL, United States; School of Environment, Earth and Ecosystem Sciences, The Open University, Milton Keynes, United Kingdom; Now at Lunar and Planetary Institute, Houston, TX, United States; Department of Earth and Planetary Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, United States; American Museum of Natural History, New York, NY, United States; Department of Earth and Environmental Sciences, The Graduate Center, City University of New York, New York, NY, United States; Lunar and Planetary Institute, Houston, TX, United States; Department of Geoscience, University of Nevada, Las Vegas, Las Vegas, NV, United States; Now at Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Eyring Materials Center, Arizona State University, Tempe, AZ, United States; Department of Earth and Planetary Sciences and McDonnell Center for the Space Sciences, Washington University, St. Louis, MO, United States; Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States; Now at Department of Physics, University of Central Florida, Orlando, FL, United States; Department of Geology, University of Maryland, College Park, MD, United States; Department of Space Studies, Southwest Research Institute, Boulder, CO, United States

Recommended Citation:
Filiberto J.,Gross J.,Udry A.,et al. Shergottite Northwest Africa 6963: A Pyroxene-Cumulate Martian Gabbro[J]. Journal of Geophysical Research: Planets,2018-01-01,123(7)
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