DOI: 10.1002/2016GL068966
论文题名: Constraints on timing and magnitude of early global expansion of the Moon from topographic features in linear gravity anomaly areas
作者: Sawada N. ; Morota T. ; Kato S. ; Ishihara Y. ; Hiramatsu Y.
刊名: Geophysical Research Letters
ISSN: 0094-9706
EISSN: 1944-9437
出版年: 2016
卷: 43, 期: 10 起始页码: 4865
结束页码: 4870
语种: 英语
英文关键词: crater chronology
; global expansion
; linear gravity anomaly
; Moon
Scopus关键词: Aneroid altimeters
; Expansion
; Orbits
; Tectonics
; Crater chronology
; Elastic lithosphere
; Extensional tectonics
; Global expansion
; Gravity anomalies
; Tectonic activity
; Topographic features
; Topographic profiles
; Moon
英文摘要: Gravity data obtained from the Gravity Recovery and Interior Laboratory have revealed linear gravity anomalies (LGAs) formed by the early global expansion of the Moon and subsequent magma intrusion. In this study, using Lunar Orbiter Laser Altimeter topographic data, we investigated topographic profiles across LGAs to verify that they were formed by extensional tectonics. We found that 17 of the 20 LGAs investigated exhibited a valley structure, suggesting that they were formed by tensile stress. Assuming that these topographic depressions accompanied graben formation, the increase in the lunar radius is estimated to be on the order of several tens of meters. On the other hand, assuming that these topographic depressions accompanied flexure of elastic lithosphere due to the LGA load, the elastic thickness during the LGA formation is estimated as ~10 km. The crater frequencies in the vicinity of LGAs indicate that the peak tectonic activity occurred before the basin-forming epoch. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971238239&doi=10.1002%2f2016GL068966&partnerID=40&md5=38c8b505820fd85a6b1f0c672a8fc1e4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10669
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: Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
Recommended Citation:
Sawada N.,Morota T.,Kato S.,et al. Constraints on timing and magnitude of early global expansion of the Moon from topographic features in linear gravity anomaly areas[J]. Geophysical Research Letters,2016-01-01,43(10).