Formation of phosphorus-rich olivine in Dar al Gani 978 carbonaceous chondrite through fluid-assisted metamorphism

doi:10.2138/am-2017-5881

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	Formation of phosphorus-rich olivine in Dar al Gani 978 carbonaceous chondrite through fluid-assisted metamorphism
	Li, Yang 1; Zhang, Ai-Cheng 1,2; Chen, Jia-Ni 1; Gu, Li-Xin 3; Wang, Ru-Cheng 1
刊名	AMERICAN MINERALOGIST
	2017
卷号	102 期号:1-2 页码:98-107
关键词	Phosphorus-rich Olivine Fluid-assisted Metamorphism Dar Al Gani 978 Carbonaceous Chondrite
ISSN号	0003-004X
DOI	10.2138/am-2017-5881
文献子类	Article
英文摘要	Phosphorus-rich olivine (P2O5 > 1 wt%) is a mineral that has been reported only in a few terrestrial and extraterrestrial occurrences. Previous investigations suggest that P-rich olivine mainly forms through rapid crystallization from high-temperature P-rich melts. Here, we report a new occurrence of P-rich olivine in an ungrouped carbonaceous chondrite Dar al Gani (DaG) 978. The P-rich olivine in DaG 978 occurs as lath-shaped grains surrounding low-Ca pyroxene and olivine grains. The lath-shaped olivine shows a large variation in P2O5 (0-5.5 wt%). The P-rich olivine grains occur in a chondrule fragment and is closely associated with chlorapatite, merrillite, FeNi metal, and troilite. Tiny Cr-rich hercynite is present as inclusions within the P-rich olivine. The lath-shaped texture and the association with Cr-rich hercynite indicates that the P-rich olivine in DaG 978 formed by replacing low-Ca pyroxene precursor by a P-rich fluid during a thermal event, rather than by crystallization from a high-temperature melt. The large variation of P2O5 within olivine grains on micrometer-scale indicates a disequilibrium formation process of the P-rich olivine. The occurrence of P-rich olivine in DaG 978 reveals a new formation mechanism of P-rich olivine.
WOS关键词	OPAQUE ASSEMBLAGES ; CRYSTALLIZATION ; PALLASITE ; CHROMIUM ; FRACTIONATION ; SOLUBILITY ; CHONDRULES ; MINERALOGY ; SEMARKONA ; PETROLOGY
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	MINERALOGICAL SOC AMER
WOS记录号	WOS:000394405000011
资助机构	Natural Science Foundation of China(41373065) ; Natural Science Foundation of China(41373065) ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Natural Science Foundation of China(41373065) ; Natural Science Foundation of China(41373065) ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Natural Science Foundation of China(41373065) ; Natural Science Foundation of China(41373065) ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Natural Science Foundation of China(41373065) ; Natural Science Foundation of China(41373065) ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93371]
专题	地质与地球物理研究所_科技支撑系统
通讯作者	Zhang, Ai-Cheng
作者单位	1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210046, Jiangsu, Peoples R China 2.Nanjing Univ, Lunar & Planetary Sci Inst, Nanjing 210046, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li, Yang,Zhang, Ai-Cheng,Chen, Jia-Ni,et al. Formation of phosphorus-rich olivine in Dar al Gani 978 carbonaceous chondrite through fluid-assisted metamorphism[J]. AMERICAN MINERALOGIST,2017,102(1-2):98-107.
APA	Li, Yang,Zhang, Ai-Cheng,Chen, Jia-Ni,Gu, Li-Xin,&Wang, Ru-Cheng.(2017).Formation of phosphorus-rich olivine in Dar al Gani 978 carbonaceous chondrite through fluid-assisted metamorphism.AMERICAN MINERALOGIST,102(1-2),98-107.
MLA	Li, Yang,et al."Formation of phosphorus-rich olivine in Dar al Gani 978 carbonaceous chondrite through fluid-assisted metamorphism".AMERICAN MINERALOGIST 102.1-2(2017):98-107.