DOI: 10.1002/2016GL070425
论文题名: Did the Orientale impact melt sheet undergo large-scale igneous differentiation by crystal settling?
作者: Cassanelli J.P. ; Head J.W.
刊名: Geophysical Research Letters
ISSN: 0094-8413
EISSN: 1944-8144
出版年: 2016
卷: 43, 期: 21 起始页码: 11156
结束页码: 11165
语种: 英语
英文关键词: crystallization
; differentiation
; impact melt
; lunar basin
; Moon
; Orientale
Scopus关键词: Cooling
; Crystallization
; Differentiation (calculus)
; Moon
; Compositional variation
; Crystallization process
; Differentiation process
; Impact melt
; Lunar basin
; Orientale
; Physical process
; Primary factors
; Structural geology
英文摘要: Significant quantities of shock-induced melt are predicted to form during basin-scale impact events and may contribute substantially to compositional variation in the lunar crust through differentiation processes. Knowledge of the evolution of impact melt sheets and the cooling and crystallization processes involved is therefore important to understanding the geology and petrology of the Moon. Here we perform a case study on the Orientale basin and investigate the possibility of differentiation of the impact melt sheet by assessing the thermal and physical processes that drive cooling and crystallization, focusing on crystal settling. Results predict that convective processes within the impact melt sheet enhance cooling and solidification and inhibit settling of crystals ~1.5 mm in diameter and smaller, preventing differentiation at or below this size. Impact melt sheet thickness is predicted to have minimal influence on crystallization history, suggesting that crystal size is the primary factor controlling lunar impact melt sheet differentiation. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84997611012&doi=10.1002%2f2016GL070425&partnerID=40&md5=2a1c55934f2232d6496adba09e2fe2b6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9376
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:
Cassanelli J.P.,Head J.W.. Did the Orientale impact melt sheet undergo large-scale igneous differentiation by crystal settling?[J]. Geophysical Research Letters,2016-01-01,43(21).