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Petrogenesis and Mo prospecting significance of Sadaigoumen granites on the northern margin of the North China Craton

文献类型：期刊论文

作者Chen, Peiwen1,2,4; Zeng, Qingdong1,2,4; Zhou, Tiancheng3
刊名JOURNAL OF GEOCHEMICAL EXPLORATION
出版日期2020-07-01
卷号214页码:21
关键词Zircon U Pb age Molybdenite Re Os age Sr Nd Hf isotopes Magmatic evolution Sadaigoumen Mo deposit
ISSN号0375-6742
DOI10.1016/j.gexplo.2020.106536
英文摘要The Sadaigoumen porphyry Mo deposit lies on the northern margin of the North China Craton. Molybdenum mineralization occurs mainly as veins and veinlets, or is disseminated within alkali feldspar granite and granite porphyry, which yield weighted-mean 2(06)Pb/U-238 ages (+/- 2 sigma) of 243.7 +/- 1.6 to 242.2 +/- 2.0 Ma and 240.0 +/- 1.7 Ma, respectively. Re-Os dating of molybdenite from Stage 3 mineralization yields an isochron age of 238.0 +/- 1.9 Ma. The Sadaigoumen ore-related granites have petrological, mineralogical, and geochemical characteristics of I-type granite. Ore-related granites exhibit low (Sr-87/Sr-86)(i) ratios of 0.710256-0.711463, negative epsilon Nd(t) values of -16.4 to -15.4 with corresponding T-DM2 (Nd) ages of 2061-1870 Ma, and negative epsilon Hf (t) values of -21.2 to -11.2 with corresponding T-DM2 (Hf) ages of 2614-1983 Ma, indicating that the primary magma was derived by partial melting of ancient lower crust. In chondrite- and primitive-mantle-normalized trace element diagrams, the Sadaigoumen ore-related granites are characterized by moderate enrichment of light rare earth elements (REE) relative to heavy REE, moderate to strong negative Nb, Ta, Zr, Hf, and Ti anomalies, and increasing Rb/Sr ratios with decreasing Sr content, all attributed to fractional crystallization. Fractionation of amphibole, muscovite, and possibly minor biotite and garnet (and/or zircon) produced the variations in most elements. Together with the regional geology, the data imply that the Sadaigoumen ore-related granites and corresponding mineralization formed in a syn-collision to post-collision transitional setting during the Early-Middle Triassic. These fractionated Triassic alkaline granites or syenogranites potentially contain new porphyry Mo deposits.
WOS关键词SOLONKER SUTURE ZONE ; ASIAN OROGENIC BELT ; IN-SITU ANALYSIS ; A-TYPE GRANITES ; RE-OS AGES ; LA-ICP-MS ; MOLYBDENUM DEPOSITS ; INNER-MONGOLIA ; GEOCHEMICAL CHARACTERISTICS ; GEOLOGICAL CHARACTERISTICS
资助项目National Natural Science Foundation of China[41390443] ; State Key Laboratory of Lithospheric Evolution[S201605]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000535920800006
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution
源URL[http://ir.iggcas.ac.cn/handle/132A11/96676]  
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Zeng, Qingdong
作者单位1.Univ Chinese Acad Sci, Collage Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Minist Nat Resources China, Key Lab Marine Sedimentol & Environm Geol, Inst Oceanog 1, Qingdao 266061, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Peiwen,Zeng, Qingdong,Zhou, Tiancheng. Petrogenesis and Mo prospecting significance of Sadaigoumen granites on the northern margin of the North China Craton[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2020,214:21.
APA Chen, Peiwen,Zeng, Qingdong,&Zhou, Tiancheng.(2020).Petrogenesis and Mo prospecting significance of Sadaigoumen granites on the northern margin of the North China Craton.JOURNAL OF GEOCHEMICAL EXPLORATION,214,21.
MLA Chen, Peiwen,et al."Petrogenesis and Mo prospecting significance of Sadaigoumen granites on the northern margin of the North China Craton".JOURNAL OF GEOCHEMICAL EXPLORATION 214(2020):21.

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来源：地质与地球物理研究所

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