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	Correlation between ni and mgo contents of olivine in segment i of the jinchuan intrusion, nw china, and its geological implication
	Chen LieMeng1,2; Song XieYan1; Lv, Danyushevsky3,4; Xiao JiaFei1; Li ShiBin1,2; Guan JianXiang1,2
刊名	Acta petrologica sinica
	2009-12-01
卷号	25期号:12页码:3369-3378
关键词	Olivine Fo Ni content Sulfide segregation Jinchuan ni-cu sulfide deposit
ISSN号	1000-0569
通讯作者	Chen liemeng(chenliemeng@163.com)
英文摘要	The jinchuan ultramafic intrusion at the southwestern margin of the north china craton hosts the third largest ni-cu-(pge) deposit in the world. the jinchuan intrusion is divided by several strike-slip faults into four segments, iii, i, it, and iv from west to east respectively. the segment i of the jinchuan intrusion is composed mainly of lherzolite, pyroxene dunite and olivine pyroxenite. olivine is the dominant rock-forming mineral of these rocks. chemical composition of olivine of the lherzolite and pyroxene dunite in the upper part of segment i have been measured its this study. the forsterite percentages (fo) of olivine range from 83. 9 to 85.7 and ni contents vary from 1396 x 10(-6) to 2043 x 10(-6), which are obviously lower than those fractionated from ni undepleted basaltic magma. model calculations indicate that olivine fractional crystallization and sulfide segregation occur at the same time during its magma evolution. the compositional variations of olivine may be resulted from its crystallization, sulfide segregation and reaction with trapped liquid. the fe-mg exchange reaction between olivine crystals and the trapped silicate liquid (about 30%) results in the fo of the early crystallized olivine decreasing 1 similar to 1.5. in addition, relatively small variations of the fo of olivine indicate a continuous injection of fresh magmas into the deeper chamber during olivine fractional crystallization and sulfide segregation.
WOS关键词	ULTRAMAFIC INTRUSION ; SULFIDE DEPOSIT ; COMPOSITIONAL VARIATIONS ; NORTHWEST CHINA ; WESTERN CHINA ; SILICATE MELT ; ORE GENESIS ; VOISEYS BAY ; LIQUID ; PGE
WOS研究方向	Geology
WOS类目	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000276369900023
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2398825
专题	中国科学院大学
通讯作者	Chen LieMeng
作者单位	1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Univ Tasmania, Sch Earth Sci, Hobart, Tas 7001, Australia 4.Univ Tasmania, ARC Ctr Excellence Ore Deposit, Hobart, Tas 7001, Australia
推荐引用方式 GB/T 7714	Chen LieMeng,Song XieYan,Lv, Danyushevsky,et al. Correlation between ni and mgo contents of olivine in segment i of the jinchuan intrusion, nw china, and its geological implication[J]. Acta petrologica sinica,2009,25(12):3369-3378.
APA	Chen LieMeng,Song XieYan,Lv, Danyushevsky,Xiao JiaFei,Li ShiBin,&Guan JianXiang.(2009).Correlation between ni and mgo contents of olivine in segment i of the jinchuan intrusion, nw china, and its geological implication.Acta petrologica sinica,25(12),3369-3378.
MLA	Chen LieMeng,et al."Correlation between ni and mgo contents of olivine in segment i of the jinchuan intrusion, nw china, and its geological implication".Acta petrologica sinica 25.12(2009):3369-3378.

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