| ~(40)Ar/~(39)Ar and Rb-Sr isochron dating of the gold deposits on northern margin of the Jiaolai Basin,Shandong,China |
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| 作者姓名： | 张连昌 沈远超 刘铁兵 曾庆栋 李光明 李厚民 |
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| 作者单位： | Institute of Geology and Geophysics，Chinese Academy of Sciences，Institute of Geology and Geophysics，Chinese Academy of Sciences，Institute of Geology and Geophysics，Chinese Academy of Sciences，Institute of Geology and Geophysics，Chinese Academy of Sciences，Institute of Geology and Geophysics，Chinese Academy of Sciences，Institute of Geology and Geophysics，Chinese Academy of Sciences Beijing 100029，China，Beijing 100029，China，Beijing 100029，China，Beijing 100029，China，Beijing 100029，China，Beijing 100029，China |
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| 摘 要： | The Shandong Peninsula (Jiaodong) is a very important gold producer of China. Over ten large and super-large quartz-vein type and shear zone-type gold deposits related to Yanshannian granite intrusions have been exploited in the northern part of the Jiaod…
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40Ar/39Ar and Rb-Sr isochron dating of the gold deposits on northern margin of the Jiaolai Basin, Shandong, China |
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| ZHANG Lianchang.~(40)Ar/~(39)Ar and Rb-Sr isochron dating of the gold deposits on northern margin of the Jiaolai Basin,Shandong,China[J].Science in China(Earth Sciences),2003,46(7). |
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| Authors: | ZHANG Lianchang |
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| Abstract: | The Pengjiakuang, Dazhuangzi and Fayunkuang gold deposits, located on the northern margin of the Mesozoic Jiaolai Basin, east of Shandong Province, are controlled by a low-angle normal fault. Gold ores are typically brecciated, veinlet and disseminated. The Ar-Ar and Rb-Sr isochron dating methods were adopted to date ores and lamprophyre dike. The results indicate that the age of the Pengjiakuang gold deposit is 117.33-118.42 Ma, that of the Dazhuangzi gold deposit is 117.39 Ma, and that of the Fayunkuang gold deposit is (128.49±7.2) Ma. The consistency in metallogenic age between the gold deposits on the margin of the Jiaolai Basin and the gold deposits (115-126 Ma) of the northern uplift area suggests that both were formed in the same metallogenic period. That is to say, the large-scale metallogeny of the Jiaodong region took place in late-Yanshannian ((120±10) Ma). |
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| Keywords: | Ar-Ar age Rb-Sr isochron gold metallogenic time northern margin of the Jiaolai Basin |
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