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| Tectonic setting discrimination and ~(40)Ar/~(39)Ar isotope geochronology of the Miba granite | |
| 作者姓名： | 张彦 陈文 刘新宇 张思红 王松山 |
| 作者单位： | Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China，Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China，Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China，Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China，Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China |
| 基金项目： | 国家重点基础研究发展计划(973计划)，the Geological Science Key Basic Project of the Ministry of Land and Resources，国家自然科学基金 |
| 摘 要： | The Miba granite is located in the juncture of Kang County in eastern Gansu Provinceand Lueyang County in Shanxi Province. It is considered to be the post-orogenic granite(POG-type) by major element discrimination method of Maniar. ~40Ar/~39Ar dating indicates that itsemplacement time is about 240-230 Ma and it is the result of the Indo-Sinian magmatism. In theearly Yanshan period (about 193.8 Ma), a thermal event resulted in the partial opening of the ar-gon isotope system of the biotite. |
Tectonic setting discrimination and 40Ar/39Ar isotope geochronology of the Miba granite |
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| ZHANG Yan,CHEN Wen.Tectonic setting discrimination and ~(40)Ar/~(39)Ar isotope geochronology of the Miba granite[J].Science in China(Chemistry),2002,45(Z1). | |
| Authors: | ZHANG Yan CHEN Wen |
| Institution: | 1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
| Abstract: | The Miba granite is located in the juncture of Kang County in eastern Gansu Province and Lueyang County in Shanxi Province. It is considered to be the post-orogenic granite (POG-type) by major element discrimination method of Maniar. ~40Ar/~39Ar dating indicates that its emplacement time is about 240-230 Ma and it is the result of the Indo-Sinian magmatism. In the early Yanshan period (about 193.8 Ma), a thermal event resulted in the partial opening of the ar- gon isotope system of the biotite. |
| Keywords: | Miba granite tectonic setting discrimination ~(40)Ar/~(39)Ar age |
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