| Chronology and cooling history of the Tianmenshan pluton in South Jiangxi Province and their geological significance |
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| 作者单位： | ZENG Qingtao 1，2，MAO Jianren 1，HU Qing1，ZHAO Xilin1，and YE Haimin1 1 Nanjing Institute of Geology and Mineral Resource，Nanjing 210016，China 2 Earth Science College of Jilin University，Changchun 130061，China |
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| 摘 要： | Geochronological studies on the crust-derived Tianmenshan pluton were undertaken by SHRIMP zircon U-Pb dating and Ar-Ar dating of biotite, muscovite and K-feldspar, giving a petrogenetic age of 167 Ma. Owing to the closure systems in different minerals, the cooling history of the pluton can be determined with an age-temperature diagram. The late hydrothermal event has been recognized, which is related probably with mineralization. In terms of the comparative geochronological and petrologic records, it is concluded that there are some constrains on tectonic evolution and that the formation of the Tianmenshan pluton proceeded in a transition period from Indosinian post-orogeny extension to strong compressive tectonics. And the timing of the hydrothermal event matches the compressive climax of the Yanshanian orogeny. The temporal gap between granite emplacement and wolframite mineralization could last 10-20 Ma owing to the low cooling rate of the pluton.
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| 关 键 词： | 花岗石 钨沉淀物 江西 冷却 |
Chronology and cooling history of the Tianmenshan pluton in South Jiangxi Province and their geological significance |
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| Authors: | Qingtao Zeng Jianren Mao Qing Hu Xilin Zhao Haimin Ye |
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| Institution: | [1]Nanjing Institute of Geology and Mineral Resource, Nanjing 210016, China [2]Earth Science College of Jilin Universtty, Changchun 130061, China |
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| Abstract: | Geochronological studies on the crust-derived Tianmenshan pluton were undertaken by SHRIMP zircon U-Pb dating and Ar-Ar dating of biotite,muscovite and K-feldspar,giving a petrogenetic age of 167 Ma.Owing to the closure systems in different minerals,the cooling history of the pluton can be determined with an age-temperature diagram.The late hydrothermal event has been recognized,which is related probably with mineralization.In terms of the comparative geochronological and petrologic records,it is concluded that there are some constrains on tectonic evolution and that the formation of the Tianmenshan pluton proceeded in a transition period from Indosinian post-orogeny extension to strong compressive tectonics.And the timing of the hydrothermal event matches the compressive climax of the Yanshanian orogeny.The temporal gap between granite emplacement and wolframite mineralization could last 10-20 Ma owing to the low cooling rate of the pluton. |
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| Keywords: | granite cooling history tungsten deposit Tianmenshan South Jiangxi Province |
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