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Permian-Triassic highly fractionated I-type granites in the Baituyingzi Mo-Cu area, southeastern Inner Mongolia, NE China: Petrogenesis and tectonic implications

文献类型：期刊论文

作者Sun, Yan2; Liu, Jianming3; Zeng, Qingdong3; Wang, Jingbin1; Gu, Xuexiang2
刊名GEOLOGICAL JOURNAL
出版日期2021-02-07
页码19
ISSN号0072-1050
关键词Baituyingzi Mo– Cu area highly fractionated I‐ type granites Permian– Triassic petrogenesis southeastern Inner Mongolia tectonic implications
DOI10.1002/gj.4098
英文摘要The Permian-Triassic plutons along the Chifeng-Bayan Obo Fault, southeastern Inner Mongolia, help to provide important constraints on the craton-orogenic boundary of the North China Craton (NCC) and the eastern Central Asian Orogenic Belt (CAOB) and the regionally coeval Mo-Cu mineralization environment. New LA-ICP-MS zircon U-Pb data indicate that two granites from the Baituyingzi Mo-Cu area in Chifeng city were emplaced at ca. 274 Ma and ca. 242 Ma. They have high SiO2 (73.44-77.82 wt%) and Na2O + K2O (8.49-10.28 wt%) contents and are high-K calc-alkaline, with very high differentiation indexes (DI = 97.1-98.3) and low Zr saturation temperatures of whole rocks (703-738 degrees C). They are also characterized by (La/Yb)(N) ratios of 4.09-9.30 and enrichments in Rb and Th relative to Nb and Ta, with pronounced negative Eu (Eu/Eu* = 0.14-0.50), Ba, Sr, P, and Ti anomalies. Comparatively, the Permian granite has slightly higher zircon epsilon Hf(t) values (+1.7 to +4.6) than those of the Triassic granite (epsilon Hf(t) = -3.4 to +0.1) and is less alkaline-rich. These results, combined with petrographic data, indicate that they are highly fractionated I-type granites. The granites were likely derived from Mesoproterozoic juvenile crust that had experienced subduction-related fluid metasomatism, and the resulting magmas then underwent extensive fractional crystallization. In combination with regional geology, we propose that: (a) the granites have tectonic affinity with the CAOB and serve as spatial markers for monitoring the juxtaposition of the NCC and the CAOB, and (b) the studied granites and coeval porphyry deposits likely formed in a syn- to post-collisional setting.
资助项目China Postdoctoral Science Foundation[2020M670398] ; National Natural Science Foundation of China[41602102] ; National Natural Science Foundation of China[42072083] ; National Key Research and Development Plan of China[2018YFC0603904]
WOS研究方向Geology
语种英语
出版者WILEY
WOS记录号WOS:000615741200001
资助机构China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/100105]  
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Sun, Yan
作者单位1.Beijing Inst Geol Mineral Resources, Deep Explorat Tech Ctr Nonferrous Mines, Beijing, Peoples R China
2.China Univ Geosci Beijing, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Yan,Liu, Jianming,Zeng, Qingdong,et al. Permian-Triassic highly fractionated I-type granites in the Baituyingzi Mo-Cu area, southeastern Inner Mongolia, NE China: Petrogenesis and tectonic implications[J]. GEOLOGICAL JOURNAL,2021:19.
APA Sun, Yan,Liu, Jianming,Zeng, Qingdong,Wang, Jingbin,&Gu, Xuexiang.(2021).Permian-Triassic highly fractionated I-type granites in the Baituyingzi Mo-Cu area, southeastern Inner Mongolia, NE China: Petrogenesis and tectonic implications.GEOLOGICAL JOURNAL,19.
MLA Sun, Yan,et al."Permian-Triassic highly fractionated I-type granites in the Baituyingzi Mo-Cu area, southeastern Inner Mongolia, NE China: Petrogenesis and tectonic implications".GEOLOGICAL JOURNAL (2021):19.

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来源：地质与地球物理研究所

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