DOI: 10.1002/2015GL066726
论文题名: Uncommon behavior of plagioclase and the ancient lunar crust
作者: Nekvasil H. ; Lindsley D.H. ; Difrancesco N. ; Catalano T. ; Coraor A.E. ; Charlier B.
刊名: Geophysical Research Letters
ISSN: 0094-8277
EISSN: 1944-8008
出版年: 2015
卷: 42, 期: 24 起始页码: 10573
结束页码: 10579
语种: 英语
英文关键词: anorthitic plagioclase
; lunar ferroan anorthosite
; lunar magma ocean
Scopus关键词: Feldspar
; Oceanography
; Sodium
; Structural geology
; Anorthitic plagioclase
; Compositional characteristics
; Gravitational settlings
; Lunar ferroan anorthosite
; Magma ocean
; New mechanisms
; Residual liquid
; Sodic plagioclase
; Moon
; albite
; anorthite
; anorthosite
; calcite
; cooling
; fractionation
; gravity field
; iron
; lithology
; lunar crust
; magma
; residual flow
; sodium
; spinel
; temperature gradient
英文摘要: Calcic plagioclase, the dominant mineral of the anorthositic lunar crust, fails to show the Na enrichment during cooling that is typical of magmatic plagioclase. We show that this enigmatic behavior may arise during fractionation of highly calcic plagioclase at depths greater than ~70 km in the lunar magma ocean because of the development of a negative azeotropic configuration at high anorthite contents that impedes and may even reverse the standard plagioclase albite enrichment with dropping temperature. This result supports a high-pressure origin of this plagioclase consistent with the lunar magma ocean model. It also provides a new mechanism for forming lunar lithologies with sodic plagioclase from a highly Na-depleted Moon through gravitational settling of spinel and refines the compositional characteristics of the late stage residual liquids of the lunar magma ocean. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955189318&doi=10.1002%2f2015GL066726&partnerID=40&md5=04eef8ece1ae94dc3675a38a16cdd642
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7893
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Geosciences, State University of New York at Stony Brook, Stony Brook, NY, United States
Recommended Citation:
Nekvasil H.,Lindsley D.H.,Difrancesco N.,et al. Uncommon behavior of plagioclase and the ancient lunar crust[J]. Geophysical Research Letters,2015-01-01,42(24).