Origin of Datongxi pluton in the West Kunlun orogen: Constraints from;mineralogy, elemental geochemistry and zircon U-Pb age

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	Origin of Datongxi pluton in the West Kunlun orogen: Constraints from;mineralogy, elemental geochemistry and zircon U-Pb age
	Gao XiaoFeng 2; Xiao PeiXi ; Kang Lei ; Xi RenGang ; Guo Lei ; Xie CongRui ; Yang ZaiChao
刊名	ACTA PETROLOGICA SINICA
	2013
卷号	29 期号:9 页码:3065-3079
关键词	Mineralogy Geochemistry Petrogenesis Datongxi pluton Ordovician West Kunlun orogen
ISSN号	1000-0569
英文摘要	The Datongxi pluton outcropping in western part of the West Kunlun orogen, consisted of high-K calc-alkaline quartz diorite, quartz monzonite and granite. The quartz diorites contain abundant mafic microgranular enclaves( MMEs) of different shapes. The quartz diorites span a SiO2 range of 56.5% similar to 65.3% and Mg-# range of 0.45 similar to 0.46, characterized by moderate LREE/HREE fractionation, strong LILE enrichment and depleted Nb-Ta and weakly Eu depletion. Relatively to the quartz diorites, the quartz monzonites and granites have high content of SiO2 (65. 0% similar to 73.3%) and low Mg-# (0.36 similar to 0. 44), stronger Nb-Ta, Ti and Eu depletion. The calculated P-T conditions are 638 similar to 768 degrees C and 1.7 similar to 4. 3kbar for the quartz diorites and 752 similar to 771 degrees C for the quartz monzonites and granites, respectively. Zircon U-Pb dating results give an emplacement age of 470 +/- 1. 2Ma for the quartz monzonites, slightly younger than the emplacement ages of 478 similar to 473Ma for the quartz diorites. The younger quartz monzonite-granite suite cannot be formed through differentiation of the older quartz diorite, indicating that both of them were derived from different melting sources. The quartz diorites and MMEs were formed through melting of the metasomatized mantle wedge in a subduction setting, while the younger quartz monzonite-granites were derived from metasedimentary protoliths in response to post-collisional extension and thermal supply from the underplating of the upwelling mantle-derived magmas. The origin of the Datongxi felsic intrusive complex may record the tectonic evolution of western Kunlun orogenic belt from the oceanic slab subduction to the post-collisional extension during Early Ordovician time.
学科主题	火成岩岩石学
WOS关键词	CARBONATE LIQU##ID#IMMISCIBILITY ; IN-HORNBLENDE BAROMETER ; CONTINENTAL-CRUST ; EXPERIMENTAL CALIBRATION ; SOUTHEASTERN AUSTRALIA ; NORTHWESTERN CHINA ; FLUID INCLUSIONS ; MAFIC ENCLAVES ; TRACE-ELEMENTS ; ICP-MS
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000326552900009
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39911]
专题	中国地质调查局西安地质调查中心
作者单位	1.CGS, Xian Ctr Geol Survey, Key Lab Study Focused Magmatism & Giant Ore Depos, MLR, Xian 710054, Peoples R China. 2.中国地质调查局西安地质调查中心
推荐引用方式 GB/T 7714	Gao XiaoFeng,Xiao PeiXi,Kang Lei,et al. Origin of Datongxi pluton in the West Kunlun orogen: Constraints from;mineralogy, elemental geochemistry and zircon U-Pb age[J]. ACTA PETROLOGICA SINICA,2013,29(9):3065-3079.
APA	Gao XiaoFeng.,Xiao PeiXi.,Kang Lei.,Xi RenGang.,Guo Lei.,...&Yang ZaiChao.(2013).Origin of Datongxi pluton in the West Kunlun orogen: Constraints from;mineralogy, elemental geochemistry and zircon U-Pb age.ACTA PETROLOGICA SINICA,29(9),3065-3079.
MLA	Gao XiaoFeng,et al."Origin of Datongxi pluton in the West Kunlun orogen: Constraints from;mineralogy, elemental geochemistry and zircon U-Pb age".ACTA PETROLOGICA SINICA 29.9(2013):3065-3079.