DOI: 10.1002/2015GL065718
论文题名: The nature and origin of Mafic Mound in the South Pole-Aitken Basin
作者: Moriarty D.P. ; III ; Pieters C.M.
刊名: Geophysical Research Letters
ISSN: 0094-8580
EISSN: 1944-8311
出版年: 2015
卷: 42, 期: 19 起始页码: 7907
结束页码: 7915
语种: 英语
英文关键词: impact basins
; impact melt
; lunar volcanic constructs
; Mafic Mound
; Moon Mineralogy Mapper
; South Poke-Aitken Basin
Scopus关键词: Calcium
; Minerals
; Poles
; Silicate minerals
; Structural geology
; Volcanoes
; Impact basins
; Impact melt
; lunar volcanic constructs
; Mafic Mound
; South Poke-Aitken Basin
; Moon
; calcium
; crater
; data set
; mafic rock
; magma
; Moon
; pyroxene
; volcanic landform
英文摘要: "Mafic Mound" is a distinctive and enigmatic feature 75 km across and 1 km high near the center of the vast South Pole-Aitken Basin (SPA). Using several modern data sets, we characterize the composition, morphology, and gravity signature of the structure in order to assess its origin. Mafic Mound is found to exhibit a perched circular depression and a homogeneous high-Ca pyroxene-bearing composition. Several formation hypotheses based on known lunar processes are evaluated, including the possibilities that Mafic Mound represents (1) uplifted mantle, (2) SPA-derived impact melt, (3) a basalt-filled impact crater, or (4) a volcanic construct. Individually, these common processes cannot fully reproduce the properties of Mafic Mound. Instead, we propose a hybrid origin in which Mafic Mound is an edifice formed by magmatic processes induced by the formation and evolution of SPA. This form of nonmare volcanism has not previously been documented on the Moon. Key Points Mafic Mound in central SPA is 75 km across, 1 km high, and rich in high-Ca pyroxene New observations (composition, topography, and gravity) strongly suggest an extrusive magmatic origin The proposed magma source is related to the formation and evolution of SPA © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946925110&doi=10.1002%2f2015GL065718&partnerID=40&md5=28cf5e44afccf497463d9996cabc1a37
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8196
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI, United States
Recommended Citation:
Moriarty D.P.,III,Pieters C.M.. The nature and origin of Mafic Mound in the South Pole-Aitken Basin[J]. Geophysical Research Letters,2015-01-01,42(19).