DOI: 10.1002/2017JE005364
Scopus记录号: 2-s2.0-85043459183
论文题名: The Character of South Pole-Aitken Basin: Patterns of Surface and Subsurface Composition
作者: Moriarty D.P. ; III ; Pieters C.M.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 3 起始页码: 729
结束页码: 747
语种: 英语
英文关键词: impact basins
; Moon
; Moon Mineralogy Mapper
; near-infrared spectroscopy
; pyroxene
; South Pole-Aitken Basin
Scopus关键词: infrared spectroscopy
; mineralogy
; Moon
; pyroxene
英文摘要: Using Moon Mineralogy Mapper data, we characterize surface diversity across the enormous South Pole-Aitken Basin (SPA) by evaluating the abundance and composition of pyroxenes, which are overwhelmingly the most abundant mafic mineral in the region. Although SPA exhibits significant complexity due to billions of years of geologic processes subsequent to formation, the basin has retained regular patterns of compositional heterogeneity across its structure. Four distinct, roughly concentric zones are defined: (1) a central SPA compositional anomaly, which exhibits a pervasive elevated Ca,Fe-rich pyroxene abundance; (2) a Mg-pyroxene annulus, which is dominated by abundant Mg-rich pyroxenes; (3) a heterogeneous annulus, which exhibits localized pyroxene-rich areas spatially mixed with feldspathic materials; and (4) the SPA exterior, which is primarily feldspathic. Pyroxene compositions in the heterogeneous annulus are similar to those in the Mg-pyroxene annulus, and Mg-rich pyroxenes also underlie the more Ca,Fe-rich pyroxene surface material across the SPA compositional anomaly. The establishment of these four distinct compositional zones across SPA constrains basin evolution models and serves to guide potential sample return (and other science) targets. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114396
Appears in Collections: 气候减缓与适应
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作者单位: Planetary Geology, Geophysics, and Geochemistry Laboratory, NASA GSFC, Greenbelt, MD, United States; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI, United States
Recommended Citation:
Moriarty D.P.,III,Pieters C.M.. The Character of South Pole-Aitken Basin: Patterns of Surface and Subsurface Composition[J]. Journal of Geophysical Research: Planets,2018-01-01,123(3)