华北陆块东南缘凤台组时代的讨论  

DISCUSSION ON AGE OF THE FENGTAI FORMATION ALONG SOUTHEASTERN MARGIN OF THE NORTH CHINA BLOCK

作　　者：曹高社[1] 张善文[2] 柳忠泉[2] 杨晓勇[3] 刘德良[3] 

机构地区：[1]河南理工大学资源与环境学院,河南焦作454000 [2]胜利石油管理局地质科学研究院,山东东营257001 [3]中国科学技术大学地球与空间科学学院,合肥230026

出　　处：《地质科学》2006年第4期720-728,共9页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金(批准号:40172072);国家重点基础研究(2001CB209133)联合资助。

摘　　要：华北陆块东南缘凤台组归属于震旦系或寒武系尚无定论,影响了对华北陆块震旦纪与寒武纪转折时期的古构造、古地理和古生物的重大质变事件的探讨。本文根据下震旦统顶部与凤台组之间裂离不整合的发现及其意义的讨论,以及凤台组夹层粉砂质泥岩620Ma的Pb-Pb等时线年龄,基本厘定出凤台组时代为晚震旦世。There was an argument about age of the Fengtai Formation being Sinian or Cambrian. Based on the discovery of breakup uncomformity between the Lower Sinian Sidingshan Formation and the Fengtai Formation, the field features and geochemical evidence of the unconformity, and the Pb-Pb isochronal dating of silt mudstone interbeds from the Fengtai Formation being 620 Ma, the paper thought that the Fengtai Formation should be deposits of Late Sinian. This result might stimulate the study of paleostructure, paleogeography and paleontology in the transitional period between the Sinian and Cambrian in the North China Block.

关 键 词：凤台组 裂离不整合 Pb—Pb等时线 晚震旦世 华北陆块 

分 类 号：P534.1[天文地球—古生物学与地层学]