| Permian Alkaline Granites in Central Inner Mongolia and Their Geodynamic Significance |
| |
| 作者姓名： | Hong Dawei Huang Huaizeng Lithosphere Research Center Chinese Academy of Geological Sciences BeijingXiao Yijun Institute of Geology Chinese Academy of Geological Sciences BeijingXu Haiming Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijingand Jin M anyuanTianjin Geological Academy Ministry of Metallurgical Industry Tianjin Fei Zhenbi |
| |
| 作者单位： | Hong Dawei，Huang Huaizeng，Lithosphere Research Center，Chinese Academy of Geological Sciences，BeijingXiao Yijun，Institute of Geology，Chinese Academy of Geological Sciences，BeijingXu Haiming，Institute of Mineral Deposits，Chinese Academy of Geological Sciences，Beijingand Jin M anyuanTianjin Geological Academy，Ministry of Metallurgical Industry，Tianjin Fei Zhenbi |
| |
| 基金项目： | This study was the project No. 48970104 supported jointly by the National Natural Scinece Foundation of China，the Chinese Foundation for Development of Geological Science and Technology，This paper was presented at the 29 th IGC held in Kyoto in August |
| |
| 摘 要： | Alkaline granites (Rb-Sr ages 276-286 Ma)occurring in the Bayan Ul-East Ujimqin belt at the southern margin of the Siberian plate originated in a tensional tectonic environment about 60 Ma earlier than the Late Devonian to Early Carboniferous collision between the Siberian and Sino-Korean plates. They belong to post-orogenic A-type granites and may be used as an indicator of the end of the orogeny. At the northern margin of the Sino-Korean plate, however, only late-orogenic calc-alkaline granites occurred during the late Caboniferous-Permian, and alkaline syenites did not appear until the Late Triassic. The asymmetric magmatism at the margins of the two neighbouring plates might be controlled by the differences in size and mass of the two plates.
|
Permian Alkaline Granites in Central Inner Mongolia and Their Geodynamic Significance |
| |
| Authors: | Hong Dawei Huang Huaizeng Lithosphere Research Center Chinese Academy of Geological Sciences BeijingXiao Yijun |
| |
| Institution: | Hong Dawei,Huang Huaizeng,Lithosphere Research Center,Chinese Academy of Geological Sciences,BeijingXiao Yijun,Institute of Geology,Chinese Academy of Geological Sciences,BeijingXu Haiming,Institute of Mineral Deposits,Chinese Academy of Geological Sciences,Beijingand Jin M anyuanTianjin Geological Academy,Ministry of Metallurgical Industry,Tianjin Fei Zhenbi |
| |
| Abstract: | Alkaline granites (Rb-Sr ages 276-286 Ma)occurring in the Bayan Ul-East Ujimqin belt at the southern margin of the Siberian plate originated in a tensional tectonic environment about 60 Ma earlier than the Late Devonian to Early Carboniferous collision between the Siberian and Sino-Korean plates. They belong to post-orogenic A-type granites and may be used as an indicator of the end of the orogeny. At the northern margin of the Sino-Korean plate, however, only late-orogenic calc-alkaline granites occurred during the late Caboniferous-Permian, and alkaline syenites did not appear until the Late Triassic. The asymmetric magmatism at the margins of the two neighbouring plates might be controlled by the differences in size and mass of the two plates. |
| |
| Keywords: | alkaline granite geodynamics Inner M ongolla |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《Acta Geologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Geologica Sinica》下载免费的PDF全文 |
