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| GEOCHEMICAL CHARACTERISTICS AND TECTONIC SIGNIFICANCE OF THE NEOPROTEROZOIC GRANITES IN NORTHERN DAXINGANLING, INNER MONGOLIA |
| ZHANG Ming1, WANG Zhong1, MENG Er-gen1, WU Li-wen1,2 |
1. Inner Mongolia Institute of Geological Survey, Hohhot 010020, Inner Mongolia, China;
2. China University of Geosciences, Beijing 110083, China |
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Abstract The well-developed Neoproterozoic granites, broadly distributed in Northern Daxinganling, Inner Mongolia, were formed in three tectono-magmatic stages, with seven rock units. Study on the rock assemblage and geochemistry of the granites shows that, the magma of intermediate-basic complex-granodiorite series in the early stage was derived mainly from upper mantle or lower crust, as the result of subduction and crust-mantle interaction. The magma of porphyritic moyite-monzogranite series in the middle stage mainly originated from the lower crust, being the product of collision-orogeny. The magma of syenite series in the late stage, mainly from the lower crust, was formed in the extensional system in the later of orogenic period. The development and evolution of the Neoproterozoic magmatic rocks has reflected the dynamic characteristics of the south margin of Siberian plate in Northern Daxinganling.
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Received: 09 May 2004
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| [1] |
CHEN Hui-jun, CUI Tian-ri, QIAN Cheng, LI Lin-chuan, CHEN Jing-sheng, LI Wei, WU Xin-wei, JIANG Bin, SI Qiu-liang, QIN Tao, TANG Zhen, ZHANG Yu-jin, GUO Wei. ZIRCON U-Pb GEOCHRONOLOGY OF BASHENGHE PLUTON IN NORTHERN DAXINGANLING MOUNTAINS: Geological Implications[J]. GEOLOGY AND RESOURCES, 2019, 28(5): 405-412. |
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2006, Vol. 15 
