LA-ICP-MS zircon U-Pb geochronology and geochemistry of the intermediate-acid intrusion in the periphery of Jiajika deposits in Western Sichuan Province
LI Mingze1,2, QIN Yulong1,2, ZHAO Chun1,2, ZHAN Hanyu1,2, ZHOU Xiong3, SUN Guangyin4
1. Key Laboratory for Strategic Resources Evaluation and Utilization of Rare Metals and Rare Earth, Sichuan Province, Chengdu 610081, China; 2. Sichuan Institute of Geological Survey, Chengdu 610081, China; 3. Chengdu Institute of Multiple Utilization of Mineral Resources, China Geological Survey, Chengdu 610041, China; 4. No.113 Geological Team of Sichuan Bureau of Geology and Mineral Resources, Luzhou 646000, China
Abstract：The Jianbacun intermediate-acid intrusion was newly discovered in the peripheral area of Jiajika deposits. The authors have conducted the research of LA-ICP-MS zircon U-Pb geochronology and geochemistry to discuss its forming age, tectonic setting and mineralization condition. The results show that the zircon crystalizing age is (211.8±1.0) Ma, and the rock belongs to calc-alkaline-metamluminous rock series, with properties of I-type granitoid, which may originate from partial melting of materials from crust and mantle. The geochemical characteristics indicate that the rock formed in post-collision setting, corresponding to the widespread regional magmatism in Western Sichuan Province during the Late Triassic. The tectonic setting property and magmatism of Jianbacun quartz diorite indicate that this area may be inadequate for the mineralization related to pegmatite mineral deposits.
李名则, 秦宇龙, 赵春, 詹涵钰, 周雄, 孙光银. 川西甲基卡矿床外围中酸性侵入岩LA-ICP-MS锆石U-Pb年龄及地球化学特征[J]. 中国地质调查, 2020, 7(5): 1-9.
LI Mingze, QIN Yulong, ZHAO Chun, ZHAN Hanyu, ZHOU Xiong, SUN Guangyin. LA-ICP-MS zircon U-Pb geochronology and geochemistry of the intermediate-acid intrusion in the periphery of Jiajika deposits in Western Sichuan Province. , 2020, 7(5): 1-9.
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2020, Vol. 7 
