Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075703 |
A Low Viscosity Lunar Magma Ocean Forms a Stratified Anorthitic Flotation Crust With Mafic Poor and Rich Units | |
Dygert, Nick1,2; Lin, Jung-Fu1; Marshall, Edward W.1; Kono, Yoshio3; Gardner, James E.1 | |
2017-11-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Much of the lunar crust is monomineralic, comprising >98% plagioclase. The prevailing model argues the crust accumulated as plagioclase floated to the surface of a solidifying lunar magma ocean (LMO). Whether >98% pure anorthosites can form in a flotation scenario is debated. An important determinant of the efficiency of plagioclase fractionation is the viscosity of the LMO liquid, which was unconstrained. Here we present results from new experiments conducted on a late LMO-relevant ferrobasaltic melt. The liquid has an exceptionally low viscosity of 0.22(-0.19)(+0.11) to 1.45(-0.82)(+0.46) Pa s at experimental conditions (1,300-1,600 degrees C; 0.1-4.4 GPa) and can be modeled by an Arrhenius relation. Extrapolating to LMO-relevant temperatures, our analysis suggests a low viscosity LMO would form a stratified flotation crust, with the oldest units containing a mafic component and with very pure younger units. Old, impure crust may have been buried by lower crustal diapirs of pure anorthosite in a serial magmatism scenario. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102300008 |
WOS关键词 | ELASTIC-WAVE VELOCITY ; HIGH-PRESSURES ; PLAGIOCLASE-FLOTATION ; PURE ANORTHOSITE ; MOON ; MELTS ; LIQUIDS ; MODEL ; BASALTS ; PETROGENESIS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28989 |
专题 | 气候变化 |
作者单位 | 1.Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA; 2.Univ Tennessee, Planetary Geosci Inst, Dept Earth & Planetary Sci, Knoxville, TN USA; 3.Carnegie Inst Sci, Geophys Lab, HPCAT, Argonne, IL USA |
推荐引用方式 GB/T 7714 | Dygert, Nick,Lin, Jung-Fu,Marshall, Edward W.,et al. A Low Viscosity Lunar Magma Ocean Forms a Stratified Anorthitic Flotation Crust With Mafic Poor and Rich Units[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(22). |
APA | Dygert, Nick,Lin, Jung-Fu,Marshall, Edward W.,Kono, Yoshio,&Gardner, James E..(2017).A Low Viscosity Lunar Magma Ocean Forms a Stratified Anorthitic Flotation Crust With Mafic Poor and Rich Units.GEOPHYSICAL RESEARCH LETTERS,44(22). |
MLA | Dygert, Nick,et al."A Low Viscosity Lunar Magma Ocean Forms a Stratified Anorthitic Flotation Crust With Mafic Poor and Rich Units".GEOPHYSICAL RESEARCH LETTERS 44.22(2017). |
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