华北克拉通太古宙地壳演化和最古老的岩石  

Archean crustal evolution and the oldest rocks in the North China craton

作　　者：刘敦一[1] 万渝生[1] 伍家善[1] S A Wilde 董春艳[1] 周红英[3] 殷小艳[1] 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]澳大利亚科汀大学应用地质系 [3]北京离子探针中心

出　　处：《地质通报》2007年第9期1131-1138,共8页Geological Bulletin of China

基　　金：国土资源部重点项目(编号:DKD2001020-3)资助。

摘　　要：简要总结了华北克拉通太古宙地壳演化的规律、认识及存在的问题,特别是近年来在最古老的岩石和锆石年代学研究方面取得的进展。华北克拉通构造热事件主要发生在约2.5Ga,导致大规模陆壳的形成。仅在鲁西、胶东等少数地区有较大规模的约2.7Ga的地质体存在。古元古代晚期的陆陆碰撞使华北克拉通最终形成统一的整体。最近对鞍山地区的研究发现大量3.6～3.8Ga的岩石和锆石。在冀东、信阳、焦作及其他地区也有始太古代—古太古代的岩石和锆石存在。华北克拉通可能存在几个不同的古太古代—始太古代陆核。This paper briefly summarizes the progress in the study of the Archean crustal evolution of the North China craton （NCC）, especially the chronological study of the oldest rocks and zircons, The -2.5 Ga tectonothermal event resulted in the formation of large-scale continental crust beneath the NCC. Large-scale ～2.7 Ga rocks are recognized only in a few areas such as eastern Shandong and Jiaodong. Continent-continent collision during the late Paleoproterozoic led to the final assembly of the NCC. Many 3.6-3.8 Ga rocks and zircons have recently been found in the Anshan area. In addition, many Eoarchean-Paleoarchean rocks and zircons are also present in eastern Hebei, Xinyang, Jiaozuo and other areas of the craton. It seems likely that the NCC contains several Paleoto Eoarchean continental nuclei.

关 键 词：华北克拉通 最古老的岩石 太古宙 地壳演化 

分 类 号：P534.2[天文地球—古生物学与地层学]