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Deciphering garnet genesis in meta-igneous rocks: An example from the Jiao-Liao-Ji Belt, North China Craton

文献类型：期刊论文

作者Huang, Guangyu2; Guo, Jinghui2; Cui, Weilong2; Palin, Richard1
刊名PRECAMBRIAN RESEARCH
出版日期2020-09-15
卷号348页码:12
ISSN号0301-9268
DOI10.1016/j.precamres.2020.105871
英文摘要Garnet is common in metamorphic rocks and can be used to efficiently constrain pressure-temperature conditions experienced during orogenesis; however, it may also crystallize as a primary phase in many types of magma, which can complicate deciphering the petrogenesis of meta-igneous rocks. In this study, geochronological and geochemical analyses of garnet and zircon were integrated to constrain garnet genesis in plagioclase-absent mafic granulite from the Jiao-Liao-Ji Belt, North China Craton. The rare earth element patterns show an equilibrium relationship between garnet and metamorphic zircon, indicating that garnet has a metamorphic origin. U-Pb dating shows that garnet has a whole-grain age of c. 1.83 Ga, with no difference between core and rim domains, which is slightly younger than metamorphic ages recorded by zircon (c. 1.87 Ga). The age difference between garnet and zircon is likely a result of differences in their closure temperature for the U-Pb isotope system. The mineral assemblage garnet + clinopyroxene + K-feldspar + titanite shows textural equilibration and was used to determine peak pressure-temperature conditions of 0.8-1.2 GPa at 830-880 degrees C. Given the age of high-pressure metamorphism (c. 1.87 Ga) calculated here being younger than c. 1.95-1.90 Ga proposed by previous studies for the west Liaodong peninsula, we suggest that c. 1.95-1.87 Ga represents the timing of progressive collision between the Longgang Block and the Nangrim Block, with the western part having collided slightly earlier than the eastern part.
WOS关键词U-PB GEOCHRONOLOGY ; HIGH-GRADE METAMORPHISM ; LA-ICP-MS ; T-T PATH ; PHASE-EQUILIBRIA ; MAFIC GRANULITES ; TRACE-ELEMENTS ; EASTERN BLOCK ; ZIRCON ; EVOLUTION
资助项目National Key R&D Program of China[2016YFC0600109] ; National Natural Science Foundation of China[41890832] ; National Natural Science Foundation of China[41902057] ; China Postdoctoral Science Foundation[2019M650834]
WOS研究方向Geology
语种英语
WOS记录号WOS:000567091500014
出版者ELSEVIER
资助机构National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/98229]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Huang, Guangyu
作者单位1.Univ Oxford, Dept Earth Sci, South Parks Rd, Oxford OX1 3AN, England
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Guangyu,Guo, Jinghui,Cui, Weilong,et al. Deciphering garnet genesis in meta-igneous rocks: An example from the Jiao-Liao-Ji Belt, North China Craton[J]. PRECAMBRIAN RESEARCH,2020,348:12.
APA Huang, Guangyu,Guo, Jinghui,Cui, Weilong,&Palin, Richard.(2020).Deciphering garnet genesis in meta-igneous rocks: An example from the Jiao-Liao-Ji Belt, North China Craton.PRECAMBRIAN RESEARCH,348,12.
MLA Huang, Guangyu,et al."Deciphering garnet genesis in meta-igneous rocks: An example from the Jiao-Liao-Ji Belt, North China Craton".PRECAMBRIAN RESEARCH 348(2020):12.

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来源：地质与地球物理研究所

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