| 青藏高原中部岩石圈结构及地球动力学的天然地震学研究 |
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| 引用本文： | 吕庆田,管志宁.青藏高原中部岩石圈结构及地球动力学的天然地震学研究[J].现代地质,1997,11(3):268-268,321. |
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| 作者姓名： | 吕庆田 管志宁 |
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| 摘 要： | 青藏高原中部岩石圈结构及地球动力学的天然地震学研究研究生吕庆田导师管志宁（应用地球物理系北京１０００８３）青藏高原的隆升和地壳缩短被普遍认为是印度板块和欧亚板块碰撞的结果，然而对隆升和地壳缩短的机制和动力学过程仍不清楚。已提出的动力学模式可分为３类：...
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| 关 键 词： | 青藏高原 岩石圈结构 地球动力学 地震学 |
DISCOVERY OF NEOGENE QUATERNARY FORAMINIFERA AND CALCAREOUS NANNOFOSSILS FROM WESTERN CHIAN AND ITS GEOLOGICAL SIGNIFICANCE |
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| Sun Zhencheng,Feng Xiaojie,Yang Fan,Xu Yulin,Yang Ping,Li Dongming.DISCOVERY OF NEOGENE QUATERNARY FORAMINIFERA AND CALCAREOUS NANNOFOSSILS FROM WESTERN CHIAN AND ITS GEOLOGICAL SIGNIFICANCE[J].Geoscience——Journal of Graduate School,China University of Geosciences,1997,11(3):268-268,321. |
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| Authors: | Sun Zhencheng Feng Xiaojie Yang Fan Xu Yulin Yang Ping Li Dongming |
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| Institution: | Sun Zhencheng 1) Feng Xiaojie 1) Yang Fan 2) Xu Yulin 3) Yang Ping 3) Li Dongming 1) |
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| Abstract: | Foraminifera and calcareous nannofossils was considered as evidence indicating transgression and used in some publication of paleoecology and paleogeography. It was also stated that the Mesozoic source rock of eastern China was transgression deposits. Foraminifera and calcareous nannofossils associated with ostracoda was discovered from the Neogene Quaternary terrestrial saline deposits in northwestern China. They are proved not to be origin of transgression from the view of paleoecology and paleogeography. The illustration shows that the distribution of these fossils was mainly controled by the saline lake in the arid climate. Since Miocene the pro saline aquatic biota including of ostracoda, foraminifera and calcareous nannofossils developed along with the eastward expansion of saline lakes. So it is not approciated to regard them as evidence of transgression. According to the analogous principle of geological realism, it is suggested that there are no large scale deposits of transgression in the Early Tertiary. The rich resources of petroleum must be originated from the terrestrial saline lake or deep lake deposits. |
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| Keywords: | foraminifera calcareous nannofossils ostracoda Cenozoic terrestrial saline lake |
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