| 中国早前寒武纪的地壳演化 |
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| 关键词:early Precambrian crust evolution China |
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| The Early Precambrian Crust Evolution of China |
| With North China Protoplatform as an example,the Archaean continental crust might be made from the dispersed nuclei in operation of whirl tectonics 2.5Ga ago. From the beginning of the early Proterozoic the crust evolutional process was controlled by the plate tectonics.There emerged the tectonic regime of coexistence of mobile belts of different natures and rigid blocks.The diversity of tectonic setting and structural pattem pronouced a beginning of new epoch of curstal evolution. The North China Protoplatform,the Tarim Protoplatform and the Yangtze Protoplatform are considered to have separated from each other at least during the end of Archaean because of the early Proterozoic accretion zones developed between them.Whereas the Cathaysia had gradually closed with the Yangtze Protoplatform since the early Proterozoic time. The nearly N/S primary structural orientation of the early Proterozoic formation in the northern nargin of the modern North China platform indicates that North China Protoplatform had been connected with Siberian craton,during and before early Proterozoic times. |
| BAI Jin,DAI Feng-yan.1994.The Early Precambrian Crust Evolution of China[J].Acta Geoscientica Sinica,15(3,4):73-84. |
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