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	Protoliths reconstruction of amphibolites from kuerti ophiolites in north xinjiang and its petrogenesis
	Ma Lin1,2; Zhang HaiXiang1; Zhang BoYou1; Niu HeCai1
刊名	Acta petrologica sinica
	2008-04-01
卷号	24期号:4页码:673-680
关键词	North xinjiang Kuerti ophiolites Protolith reconstruction Petrogenesis Backarc basin
ISSN号	1000-0569
通讯作者	Ma lin(marlin0814@163.com)
英文摘要	Amphibolites form the southern slab of kuerti ophiolite alternate with plagiogranites as dikes. they are characterized by lile enrichment, hfse depletion and flat to depleted lree pattern that display the features both of morb and island arc basalt. the study of the protoliths of these amphibolites indicates that their protoliths are sub-alkalic tholeiites, which represents the lower intrusive rock section of ophiolites. generally positive correlations of the elemental ratios ( e. g., th/nb, la/yb and th/yb), depleted lree and highs epsilon(nd) (t) values show the source of amphibolites might be the depleted morb mantle with some arc component. therefore, we propose a two-stage evolution model to interpret the compositional characteristics of the kuerti amphibolites. first, during early devonian, are basaltic melts were extracted from the hydrated are mantle wedge beneath kuerti by the northward subduction of the paleo-asian oceanic crust, leaving behind a depleted mantle source. then, low degree partial melting of the depleted mantle source occurred and sub-alkalic tholeiites, which are the protoliths of kuerti amphibolites, generated during seafloor spreading in the kuerti backarc basin in middle late devonian.
WOS关键词	BACK-ARC BASIN ; MARIANA TROUGH BASALTS ; SUBDUCTION COMPONENTS ; IGNEOUS ROCKS ; EVOLUTION ; PETROLOGY ; MANTLE ; SR ; GEOCHEMISTRY ; GENERATION
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:000256696700006
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2392405
专题	中国科学院大学
通讯作者	Ma Lin
作者单位	1.Chinese Acad Sci, Key Lab Isotope Geochronol & Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ma Lin,Zhang HaiXiang,Zhang BoYou,et al. Protoliths reconstruction of amphibolites from kuerti ophiolites in north xinjiang and its petrogenesis[J]. Acta petrologica sinica,2008,24(4):673-680.
APA	Ma Lin,Zhang HaiXiang,Zhang BoYou,&Niu HeCai.(2008).Protoliths reconstruction of amphibolites from kuerti ophiolites in north xinjiang and its petrogenesis.Acta petrologica sinica,24(4),673-680.
MLA	Ma Lin,et al."Protoliths reconstruction of amphibolites from kuerti ophiolites in north xinjiang and its petrogenesis".Acta petrologica sinica 24.4(2008):673-680.

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