Emplacement Ages and Petrogenesis of the Molybdenum-bearing Granites in the Jinduicheng Area of East Qinling, China Constraints from Zircon U-Pb Ages and Hf Isotopes

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	Emplacement Ages and Petrogenesis of the Molybdenum-bearing Granites in the Jinduicheng Area of East Qinling, China Constraints from Zircon U-Pb Ages and Hf Isotopes
	Li, HY (Li Hongying); Wang, XX (Wang Xiaoxia); Ye, HS (Ye Huishou); Yang, L (Yang Lei)
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2012
卷号	86 期号:3 页码:661-679
关键词	granites petrogensis LA-ICP-MS U-Pb dating Zircon Hf isotope Jinduicheng
ISSN号	1000-9515
英文摘要	The Mesozoic porphyry assemblage in the Jinduicheng area is a special molybdenum area in China, the Mo deposits, including the Jinduicheng, Balipo, Shijiawan, Huanglongpu, are distributed. The emplacement age and geochemical features of the granites in the Jinduicheng area can provide essential information for the exploration and development of the porphyry molybdenum deposit. In this study, we report LAICPMS zircon UPb age and zircon Hf isotopic compositions of granite porphyries from the Jinduicheng area, and provide insights on the petrogensis and source characteristics of the granites. The results show that the zircon UPb ages of the Jinduicheng granite porphyry (143 +/- 1 Ma) and the Balipo granite (154 +/- 1 Ma), agree well with the ReOs ages of molybdenite in the Jinduicheng molybdenum polymetallic deposit (139 +/- 3 Ma) and the Balipo molybdenum polymetallic deposit (156 +/- 2 Ma), indicating that the emplacement of granite porphyries occurred between Late Jurassic and Early Cretaceous. Zircons granite from the Jinduicheng area give the eHf(t) values mainly ranging from 10 to 16, and 20 to 24, respectively, corresponding to twostage model ages (tDM2 mainly focused on 1.862.0 Ga, and 2.22.6 Ga, respectively) of zircons of the granite from the Jinduicheng values. The oreforming materials are mainly derived from crust, with minor mantle substances. Zircons of the granite from the Balipo area give eHf(t) values ranging from 18 to 20, 28 to 38, and 42 to 44, respectively, corresponding to twostage model ages (tDM2 mainly focused on 1.883.0 Ga, and 3.23.90 Ga, respectively), the eHf(t) values of the Jinduicheng porphyry more than that of the Balipo porphyry, and twostage model ages (tDM2) less than that of the Balipo porphyry, shows that he source of the porphyries originated from ancient lower crustal materials in the Jinduicheng area, and mixed younger components, more younger components contributed for the source of the Jinduicheng porphyry.
学科主题	火成岩岩石学
WOS关键词	ARCHEAN CRUSTAL EVOLUTION ; PLASMA-MASS SPECTROMETRY ; DABIE OROGENIC BELT ; LU-HF ; NORTH CHINA ; TECTONIC IMPLICATIONS ; SHAANXI PROVINCE ; DETRITAL ZIRCONS ; MAGMATISM ; MANTLE
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000306065300013
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39538]
专题	中国地质调查局
作者单位	CNOOC, Res Inst, Beijing 100027, Peoples R China
推荐引用方式 GB/T 7714	Li, HY ,Wang, XX ,Ye, HS ,et al. Emplacement Ages and Petrogenesis of the Molybdenum-bearing Granites in the Jinduicheng Area of East Qinling, China Constraints from Zircon U-Pb Ages and Hf Isotopes[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2012,86(3):661-679.
APA	Li, HY ,Wang, XX ,Ye, HS ,&Yang, L .(2012).Emplacement Ages and Petrogenesis of the Molybdenum-bearing Granites in the Jinduicheng Area of East Qinling, China Constraints from Zircon U-Pb Ages and Hf Isotopes.ACTA GEOLOGICA SINICA-ENGLISH EDITION,86(3),661-679.
MLA	Li, HY ,et al."Emplacement Ages and Petrogenesis of the Molybdenum-bearing Granites in the Jinduicheng Area of East Qinling, China Constraints from Zircon U-Pb Ages and Hf Isotopes".ACTA GEOLOGICA SINICA-ENGLISH EDITION 86.3(2012):661-679.