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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
Chu, Shaoxiong1,2; Zeng, Qingdong1,2; Liu, Jianming1,2; Wang, Yongbin1,2
2019-05-01
Source PublicationJOURNAL OF GEOCHEMICAL EXPLORATION
ISSN0375-6742
Volume200Pages:84-103
AbstractThe 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.
KeywordCentral Asian Orogenic Belt Sankuanggou Fe-Cu-(Mo) deposit Early-Middle Jurassic Re-Os Lu-Hf NE China
DOI10.1016/j.gexplo.2019.01.013
Funding OrganizationNational 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
WOS KeywordASIAN OROGENIC BELT ; U-PB AGES ; HF-ISOTOPE ANALYSIS ; FE-CU DEPOSIT ; RE-OS ; HEILONGJIANG PROVINCE ; FLUID INCLUSION ; NORTHEAST CHINA ; TRACE-ELEMENT ; MO DEPOSITS
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000460904500007
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90912
Collection矿产资源研究院重点实验室
Corresponding AuthorChu, Shaoxiong
Affiliation1.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
Recommended Citation
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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