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  

OUTLINE OF PALEOPROTEROZOIC TECTONIC DIVISION AND PLATE TECTONIC EVOLUTION OF NORTH CHINA CRATON

作　　者：李江海[1,2] 钱祥麟[1,2] 谷永昌 

机构地区：[1]北京大学地质学系 [2]河北省区域地质矿产调查研究所

出　　处：《地球科学（中国地质大学学报）》1998年第3期230-235,共6页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金

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．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.

关 键 词：构造区划 板块构造 古元古代 华北克拉通 

分 类 号：P542.4[天文地球—构造地质学] P547[天文地球—地质学]