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Early-Middle Jurassic magmatism and skarn-porphyry mineralization in NE China: Geochronological and geochemical constraints from the Sankuanggou skarn Fe-Cu-(Mo) deposit, and tectonic implications

文献类型：期刊论文

作者Chu, Shaoxiong1,2; Zeng, Qingdong1,2; Liu, Jianming1,2; Wang, Yongbin1,2
刊名JOURNAL OF GEOCHEMICAL EXPLORATION
出版日期2019-05-01
卷号200页码:84-103
ISSN号0375-6742
关键词Central Asian Orogenic Belt Sankuanggou Fe-Cu-(Mo) deposit Early-Middle Jurassic Re-Os Lu-Hf NE China
DOI10.1016/j.gexplo.2019.01.013
英文摘要The Early-Middle Jurassic tectonic setting of NE China is poorly defined. Mineralization of this period, especially skarn-porphyry mineralization and the ore-related magmatism, can provide well constraints on the geodynamic setting. An analysis of the spatio-temporal distribution of skarn-porphyry deposits in NE China, with the Sankuanggou skarn Fe-Cu-(Mo) deposit chosen as a typical example, was conducted in an attempt to elucidate the tectonic setting of the region. The Sankuanggou deposit is located in the Great Xing'an Range, in the eastern segment of the Central Asian Orogenic Belt. Re-Os isochron dating of molybdenites indicates the ages of the skarn- and veinlets-disseminated-type mineralization are 172.9 +/- 3.3 and 173.4 +/- 6.3 Ma, respectively. This suggests that the mineralization was contemporaneous with emplacement of granodiorite (175.9 +/- 1.6 Ma), and related to Early Jurassic magmatism. Zircons from the Sankuanggou granodiorite have epsilon(Hf)(t) values of + 8.7 to + 11.2. Sulfur isotopic compositions (delta S-34) of the sulfides range from -3.59 parts per thousand to +0.92 parts per thousand, indicating that the ore-forming materials were mainly derived from magma. The Re content of molybdenite (11.3-63.3 ppm) suggests that the ore-forming materials mainly originated from a mixed crust-mantle source. Geochemical characteristics and Sr-Nd-Pb-Hf isotopic compositions suggest that the ore-forming granodiorite was formed in a continental arc setting, melts of which largely originated from partial melting of a mantle wedge induced by the subducted slab. Based on the spatio-temporal distribution of the skarn-porphyry deposits in NE China, we propose that the Early-Middle Jurassic period (200-160 Ma) is likely to have been one of the most important metallogenic epochs in NE China. These deposits formed in a continental arc setting, which was closely related to the westward subduction of the paleo-Pacific Plate during this period.
WOS关键词ASIAN OROGENIC BELT ; U-PB AGES ; HF-ISOTOPE ANALYSIS ; FE-CU DEPOSIT ; RE-OS ; HEILONGJIANG PROVINCE ; FLUID INCLUSION ; NORTHEAST CHINA ; TRACE-ELEMENT ; MO DEPOSITS
资助项目National Key R&D Program of China[2017YFC0601306] ; National Natural Science Foundation of China[41602099] ; National Natural Science Foundation of China[41390443] ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences[KLMR2015-04]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000460904500007
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences ; Open Foundation of the Key Laboratory of Mineral Resources, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/90912]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Chu, Shaoxiong
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 10029, Peoples R China
推荐引用方式
GB/T 7714		 Chu, Shaoxiong,Zeng, Qingdong,Liu, Jianming,et al. Early-Middle Jurassic magmatism and skarn-porphyry mineralization in NE China: Geochronological and geochemical constraints from the Sankuanggou skarn Fe-Cu-(Mo) deposit, and tectonic implications[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2019,200:84-103.
APA Chu, Shaoxiong,Zeng, Qingdong,Liu, Jianming,&Wang, Yongbin.(2019).Early-Middle Jurassic magmatism and skarn-porphyry mineralization in NE China: Geochronological and geochemical constraints from the Sankuanggou skarn Fe-Cu-(Mo) deposit, and tectonic implications.JOURNAL OF GEOCHEMICAL EXPLORATION,200,84-103.
MLA Chu, Shaoxiong,et al."Early-Middle Jurassic magmatism and skarn-porphyry mineralization in NE China: Geochronological and geochemical constraints from the Sankuanggou skarn Fe-Cu-(Mo) deposit, and tectonic implications".JOURNAL OF GEOCHEMICAL EXPLORATION 200(2019):84-103.

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来源：地质与地球物理研究所

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