| 攀西裂谷的多期活动性及其深部地质意义 |
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| 引用本文： | 陈琦,王平.攀西裂谷的多期活动性及其深部地质意义[J].吉林大学学报(地球科学版),1987(1). |
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| 作者姓名： | 陈琦 王平 |
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| 作者单位： | 长春地质学院动力地质专业
(陈琦)，长春地质学院动力地质专业(王平) |
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| 摘 要： | 攀西裂谷具有明显的长期、继承和多期活动性特点,为一“上叠裂谷”,其基底在晋宁期就已存在裂谷系。是海西—印支期时,随着攀西由板内—低纬度被动陆缘—中纬度活动陆缘—板内的变化,裂谷活动和地幔涌流特点也有所不同。攀西裂谷的演化提供了一个深断裂诱发地幔涌流,并随板块飘移而移动的典型例证。这种壳、幔关系可能正是地槽多旋回活动的主因。自第三纪以来,攀西浅、深部地壳应力场明显不一致,这种现象有可能是不同构造学说结合的纽带。
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| 关 键 词： | 大陆裂谷 深大断裂 大陆板块构造 上叠构造 |
THE MULTIPERIODIC ACTIVITY OF THE PAN-XI RIFT AND ITS SIGNIFICANCE IN DEEP GEOLOGY |
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| Chen Qi Wang Ping.THE MULTIPERIODIC ACTIVITY OF THE PAN-XI RIFT AND ITS SIGNIFICANCE IN DEEP GEOLOGY[J].Journal of Jilin Unviersity:Earth Science Edition,1987(1). |
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| Authors: | Chen Qi Wang Ping |
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| Institution: | Chen Qi Wang Ping |
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| Abstract: | Studies show that the evolution of Pan-Xi Rift bears clearly longoterm, successive and polycyclic features.There was already a rift system in its basement during 700-1700 ma B.P., which had strictly controlled the later Pan-Xi Rift.So the Pan-Xi Rift was really a superimposed rift, its evolving stages may be summarized as follows.Ordovician-Carboniferous; Early Permianj Late Permian; Early-Middle Triassic; Late Triassic-Early Jurassic; Middle Jurassic-Early Cretaceous; Late Cretaceous-Paleogene; Neogene-Present.Important implications on the mantle-crust relationship can be drawn from the stadies of evolution of Pan-Xi Rift:1. Some deep faults are able to cause mantle plume and carry it in drifting;2. The exsistance of passive mantle plume caused by deep faults may play a very important role in the polycyclic activities of a geosynclinei3. The stress models for the lower and upper levels of lithosphere could be different or even reverse. |
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| Keywords: | continental rift valley abyssal fault plate tectonic superimposed structure |
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