| The Cenozoic Volcanoes in Northeast China |
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| 作者姓名： | LIU Jiaqi HAN Jingtai and GUO Zhengfu |
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| 作者单位： | Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，P. R. China |
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| 摘 要： | There are more than 600 Cenozoic volcanic cones and craters with about 50 000 km2 of lava flows in northeast Chi-na, which formed many volcanic clusters and shown the features of the continental rift-type volcanoes. Most volcanic activi-ties in this area, especially in the east part of Songliao graben, were usually controlled by rifts and faults with the main direc-tion of NE / NNE in parallel and become younger from the central graben towards its both sides, especially to the east conti-nental margin. It is revealed that the volcanism occurred in northeast China was as strong as that occurred in Japan during the Miocene and the Quaternary. The Quaternary basalt that is usually distributed along river valley is called "valley basalt" while Neogene basalt usually distributed in the top of mounts is called "high position basalt". These volcanoes and volcanic rocks are usually composed of alkaline basalts with ultramafic inclusions, except Changbaishan volcano that is built by tra-chyte and pantellerite.
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The Cenozoic Volcanoes in Northeast China |
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| LIU Jiaqi,HAN Jingtai and GUO Zhengfu.The Cenozoic Volcanoes in Northeast China[J].Journal of Geoscientific Research in Northeast Asia,2002(1). |
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| Authors: | LIU Jiaqi HAN Jingtai and GUO Zhengfu |
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| Abstract: | There are more than 600 Cenozoic volcanic cones and craters with about 50 000 km2 of lava flows in northeast Chi-na, which formed many volcanic clusters and shown the features of the continental rift-type volcanoes. Most volcanic activi-ties in this area, especially in the east part of Songliao graben, were usually controlled by rifts and faults with the main direc-tion of NE / NNE in parallel and become younger from the central graben towards its both sides, especially to the east conti-nental margin. It is revealed that the volcanism occurred in northeast China was as strong as that occurred in Japan during the Miocene and the Quaternary. The Quaternary basalt that is usually distributed along river valley is called "valley basalt" while Neogene basalt usually distributed in the top of mounts is called "high position basalt". These volcanoes and volcanic rocks are usually composed of alkaline basalts with ultramafic inclusions, except Changbaishan volcano that is built by tra-chyte and pantellerite. |
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| Keywords: | Northeast China Cenozoic volcanics Continental rifting |
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