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从层序地层学研究试论华北地区寒武系与奥陶系分界
引用本文:季强,章雨旭.从层序地层学研究试论华北地区寒武系与奥陶系分界[J].地质论评,1997,43(3):241-248.
作者姓名:季强  章雨旭
作者单位:[1]中国地质博物馆 [2]中国地质科学院
基金项目:国家攀登项目“中国古大陆及边缘层序地层及海平面变化研究”成果之一
摘    要:华北地区寒武系-奥陶系过渡沉积可划分为三个层序:凤山层序、两河口-红花园层序和大湾层序,凤山层序与两河口-红花园层序之间的界面为Ⅱ型层序界面(SB2),而两河口-红花园层序与大湾层序之间的界面为I型层序界面(SB1)。华北地区寒武系-奥陶系界线应置于两河口-红花园层序的海侵体系域的下界面,在徐州地区为三山子组(狭义)与韩家组之间,在北京西山为韭园组微晶丘与冶里组之间。

关 键 词:寒武系  奥陶系  层序地导  地层界线  华北地区

A DISCUSSION ON THE CAMBRIAN-ORDOVICIAN BOUNDARY IN NORTH CHINA PLATE IN THE LIGHT OF SEQUENCE STRATIGRAPHY
Ji Qiang Zhang Yuxu.A DISCUSSION ON THE CAMBRIAN-ORDOVICIAN BOUNDARY IN NORTH CHINA PLATE IN THE LIGHT OF SEQUENCE STRATIGRAPHY[J].Geological Review,1997,43(3):241-248.
Authors:Ji Qiang Zhang Yuxu
Abstract:Based on the sequence stratigraphic analysis of the transitional deposits of Cambrian-Ordovi-cian boundary in North China Plate, are recognized three depositional sequences:the Fengshan depositional sequence (DS F) ,the Lianghekou-Honghuayuan depositional sequence (DS LH) and the Dawan depositional sequence (DS D). The boundary between DS F and DS LH is considered as the I -type sequence boundary (SB2) ,and the boundary between DS LH and DS D the I -type sequence boundary (SBl). The Cambrian-Ordovician boundary should be placed at the bottom of the TST of the DS LH, i. e. between the micrite mound of Jiuyuan Fm. and Yeli Fm. in Western Hills, Beijing and between the dolostone of Sanshanzi Fm. and Hanjia Fm. in Xuzhou area.
Keywords:Cambrian-Ordovician boundary  sequeence stratigraphy  North China plate  
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