| 华北克拉通古元古代区域构造格架及其板块构造演化探讨 |
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| 引用本文： | 李江海,钱祥麟,谷永昌.华北克拉通古元古代区域构造格架及其板块构造演化探讨[J].地球科学,1998,23(3):41. |
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| 作者姓名： | 李江海 钱祥麟 谷永昌 |
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| 作者单位： | 北京大学地质学系，河北省区域地质矿产调查研究所 |
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| 摘 要： | 华北克拉通古元古代区域构造至少可以划分出三大构造单元：（１）陆内裂谷带（２．３０～２．６０Ｇａ）；（２）陆缘造山带（２．３０～２．６０Ｇａ）；（３）再造的太古代克拉通区（麻粒岩相带）（大于２．５０Ｇａ）．太古代末—古元古代重要的区域性构造－热事件序列依次为：（１）克拉通中部不同地壳层次伸展及裂谷盆地的发育；（２）克拉通北缘构造活动、增生及陆壳基底再造；（３）与大陆裂谷盆地闭合过程相联系的板内造山－前陆盆地发育．板块构造模式可以很好地解释上述构造作用类型．
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| 关 键 词： | 变质基底，构造区划，板块构造，古元古代 |
OUTLINE OF PALEOPROTEROZOIC TECTONIC DIVISION AND PLATE TECTONIC EVOLUTION OF NORTH CHINA CRATON |
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| Li Jianghai,Qian Xianglin.OUTLINE OF PALEOPROTEROZOIC TECTONIC DIVISION AND PLATE TECTONIC EVOLUTION OF NORTH CHINA CRATON[J].Earth Science-Journal of China University of Geosciences,1998,23(3):41. |
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| Authors: | Li Jianghai Qian Xianglin |
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| Abstract: | At least three tectonic units could be divided for the Paleoproterozoic tectonic framework of North China Craton(NCC): (1) intra_cratonic rifts (2.6-2.3Ga), (2) marginal orogen (2.6-2.3Ga), and (3) reworked Archean craton (mainly granulite facies belt, >2.5Ga). The important tectono_thermal events in late Neoarchean to Paleoproterozoic may be inferred from regional tectonic analysis, including: (1) extension and development of continental rift in the central portion of NCC; (2) accretion and reworking along the north margin of NCC; (3) closure of the rift and intra-plate orogeny. The tectonic evolution of NCC during early Precambrian could be well explained by the plate tectonic regime. |
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| Keywords: | metamorphic basement tectonic division plate tectonics Paleoproterozoic |
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