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DOI	10.1016/j.jseaes.2018.05.006
	Petrogenesis and tectonic setting of Early Cretaceous granodioritic porphyry from the giant Rongna porphyry Cu deposit, central Tibet
	Zhang, Xia-Nan; Li, Guang-Ming; Qin, Ke-Zhang; Lehmann, Bernd; Li, Jin-Xiang; Zhao, Jun-Xing; Cao, Ming-Jian; Zou, Xin-Yu
通讯作者	Li, GM (通讯作者)
发表日期	2018
ISSN	1367-9120
EISSN	1878-5786
起始页码	74
结束页码	92
卷号	161
英文摘要	The Rongna Cu-(Au) deposit is a recently discovered giant low-grade composite porphyry-high sulfidation epithennal system in the Duolong ore district of central Tibet. We present zircon U-Pb ages, bulk-rock geo-chemical and Sr-Nd isotope data, as well as zircon Hf-O isotope data to constrain the petrogenesis of the Rongna granodioritic porphyry, on which the ore system is centered. Secondary ion mass spectrometry (SIMS) zircon U-Pb data for two samples yielded ages of 118.7 +/- 0.9 Ma and 117.1 +/- 0.9 Ma, respectively. The granodioritic porphyry is of high-K talc-alkaline and magnetite-series affinity, with enrichment of light rare earth elements (LREEs) and large-ion lithophile elements (e.g., Rb, Pb, and K), and depletion of high-field strength elements (e.g., Ta, Nb, and Ti), typical of the geochemical signature of arc magmas. The Rongna granodioritic porphyry has initial Sr isotopic ratios of 0.7060-0.7099, and epsilon(Nd)(t) values of -5.7 to -1.7 with T-DM (Nd) of 983-1900 Ma. The zircons have relatively narrow Hf-O isotopic compositions (epsilon(Hf)(t) = + 3.30- + 6.43; 8180 = + 5.94- + 6.96 parts per thousand), indicating the involvement of old crustal materials. Our data suggest that the Rongna granodioritic porphyry likely evolved by fractional crystallization from a hybrid magma of mantle-derived mafic melts and lower crustal felsic melts during a period of magmatic flare-up following flat-slab subduction.
关键词	ZIRCON U-PB NUJIANG METALLOGENIC BELT AU DEPOSIT COPPER-DEPOSIT HYDROTHERMAL ALTERATION SOUTHERN QIANGTANG PHASE-EQUILIBRIA DUOLONG PORPHYRY VOLCANIC-ROCKS EL-SALVADOR
英文关键词	Porphyry deposit; High sulfidation epithermal deposit; Petrogenesis; Rongna; Duolong; Tibet
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000435062400006
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259264
推荐引用方式 GB/T 7714	Zhang, Xia-Nan,Li, Guang-Ming,Qin, Ke-Zhang,et al. Petrogenesis and tectonic setting of Early Cretaceous granodioritic porphyry from the giant Rongna porphyry Cu deposit, central Tibet[J]. 中国科学院青藏高原研究所,2018,161.
APA	Zhang, Xia-Nan.,Li, Guang-Ming.,Qin, Ke-Zhang.,Lehmann, Bernd.,Li, Jin-Xiang.,...&Zou, Xin-Yu.(2018).Petrogenesis and tectonic setting of Early Cretaceous granodioritic porphyry from the giant Rongna porphyry Cu deposit, central Tibet.JOURNAL OF ASIAN EARTH SCIENCES,161.
MLA	Zhang, Xia-Nan,et al."Petrogenesis and tectonic setting of Early Cretaceous granodioritic porphyry from the giant Rongna porphyry Cu deposit, central Tibet".JOURNAL OF ASIAN EARTH SCIENCES 161(2018).