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WANG Qiang, SUN Yan, ZHANG Xue-hui, ZHANG Shi-ming, WANG Yu-liang, ZHANG Chun-mao. Zircon LA-ICP-MS U-Pb age of plagiogranite porphyry in the Cunqian copper polymetallic deposit of Jiangxi Province and its geological implications[J]. GEOLOGY IN CHINA, 2012, 39(5): 1143-1150.
Citation: WANG Qiang, SUN Yan, ZHANG Xue-hui, ZHANG Shi-ming, WANG Yu-liang, ZHANG Chun-mao. Zircon LA-ICP-MS U-Pb age of plagiogranite porphyry in the Cunqian copper polymetallic deposit of Jiangxi Province and its geological implications[J]. GEOLOGY IN CHINA, 2012, 39(5): 1143-1150.
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Zircon LA-ICP-MS U-Pb age of plagiogranite porphyry in the Cunqian copper polymetallic deposit of Jiangxi Province and its geological implications

  • 1.

    Chengdu University of Technology,Chengdu 610059,Sichuan,China

  • 2.

    Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, Jiangsu, China

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  • Abstract：The Cunqian copper polymetallic deposit is an important porphyry-skarn deposit along eastern Qinhang metallogenic belt. The ore-bearing intrusive body comprises biotite plagiogranite porphyry and plagiogranite porphyry, characterized by repeated invasion and calcium-basic rocks. The LA-ICP-MS technique was used in this study, and U-Th-Pb isotopic analysis was made for zircons from the ore-bearing plagioclase granite porphyry, with the petrogenic age obtained being (169.3 ± 1.1)Ma. This petrogenic age of the ore-bearing rock body is very close to ages of Dexing granodiorite porphyry, Yinshan quartz porphyry, Lengshuikeng granite porphyry and Tongcun granite-porphyry, suggesting that an event of large-scale magmatic emplacement and mineralization took place in 175-156Ma, which led to the formation of many porphyry-skarn copper polymetallic deposits related to adakite or alkali-calcic granite, and implying that the Qinhang metallogenic belt produced a metallogenic series of porphyry-skarn copper polymetallic deposits under the same magma-dynamic background in this period.
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