| Citation: |
XU Hua, HUANG Bing-Cheng, NI Zhan-Xu, HAN Shu-Peng, HUANG Ying, GONG Yun. Zircon LA-ICP-MS U-Pb age, petrog-raphy, geochemistry and tectonic implications of the Guluo alkaline gabbroic rock in the Dayaoshan, Guangxi[J]. South China Geology, 2014, (4): 342-351. doi: 10.3969/j.issn.1007-3701.2014.04.005
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Zircon LA-ICP-MS U-Pb age, petrog-raphy, geochemistry and tectonic implications of the Guluo alkaline gabbroic rock in the Dayaoshan, Guangxi
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Abstract
Guluo alkaline gabbroic magmatic rocks including Guluo and Huangqiangchong intrusive rocks are comprising of gabbro, quartz-gabbro (or quartz-diorite). These rocks are enriched in alkalies, LILE, LREE and HFSE, characteristed by no Nb and Ta anomalies, which indicates belongs to typical intrapate-shoshonite series. Zircon LA-ICP-MS U-Pb dating of Guluo alkaline gabbroic rocks yields the 206Pb/238U age of 165.63±0.95 Ma. The geochronology data suggests that Guluo alkaline gabbroic rocks as typical intrapate-shoshonite series was formed in the Middle Jurassic Period, and indicated that the magma was generated in the tectonic settings of con-tinental crust extension and thinning, which records post-orogenesis event of South China in the Early Yanshan-nian period.-
Keywords:
- petrogeochemistry /
- zircon LA-ICP-MS U-Pb ages /
- alkaline gabbroic rock /
- Dayaoshan
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XU Hua, HUANG Bing-Cheng, NI Zhan-Xu, HAN Shu-Peng, HUANG Ying, GONG Yun. Zircon LA-ICP-MS U-Pb age, petrog-raphy, geochemistry and tectonic implications of the Guluo alkaline gabbroic rock in the Dayaoshan, Guangxi[J]. South China Geology, 2014, (4): 342-351. doi: 10.3969/j.issn.1007-3701.2014.04.005
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