贵州东部中上寒武统层序地层学及台地演化

贵州东部中上寒武统层序地层学及台地演化

王贤1 2, 张秀莲1, 孙宇2, 林勋2, 覃天2, 曲伟2

1. 北京大学地质系，北京 10087l ; 2. 新疆油田分公司勘探开发研究院，新疆克拉玛依 834000

收稿日期:2003-09-20 修回日期:2003-09-20 出版日期:2003-09-20 发布日期:2003-09-20

Middle and Upper Cambrian in the East of Guizhou Province

WANG Xian1 2, ZHANG Xiu-1ian1, SUN Yu2, LIN Xun2, QIAN Tian2, Qu Wei2

1. Department of Geology, Beijing University, Beijing 100871, China; 2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, Petroleum, Karamay, Xinjiang 834000, China

Received:2003-09-20 Revised:2003-09-20 Online:2003-09-20 Published:2003-09-20

摘要/Abstract

摘要： 通过对贵州东部丹寨一三都中上寒武统两个碳酸盐岩露头剖面的层序地层学研究，识别出3个(三级)层序及8个体系域，并认为由于构造升降运动，两露头剖面的沉积环境发生变化，该区台地类型由中寒武统的缓坡型陆棚演变成上寒武统的镶嵌陆架型台地。研究表明，自中元古宙晚期以来，研究区经历了由洋壳过渡到陆壳的演变过程，体现在该区自中寒武世至晚寒武世由广阔的坡缓底平的广海陆棚沉积，转为台地(斜坡)-广海(盆地)沉积环境。

Abstract: Three 3rd-order sequences and eight system tracts are recognized in two outcrop sections of the Middle and Upper Cambrian in Danzai and Sandu，eastern Guizhou province．Because of the tectonic fluctuation activity，the sedimentary environments of the two outcrops changed and the Platform evolved from ramp shelf in the Middle Cambrian to rimmed shelf in Upper Cambrian．Since the late of Middle Proterozoic Era，the ocean crust evolved to continental crust gradually in Guizhou area．Therefore，there were two sedimentary models：a broad open sea shelf model with ramp platform and flat floor，formed in the Middle Cambrian；and a platform (ramp)-open sea(basin)sedimentary model，shaped in the Upper Cambrian．The sequence cycles was controlled by the evolution of regional tectonics，and the sedimentary sequence characters are very important to the analysis of sedimentary environment．

王贤 , 张秀莲, 孙宇, 林勋, 覃天, 曲伟. 贵州东部中上寒武统层序地层学及台地演化[J]. J4.

WANG Xian1 2, ZHANG Xiu-1ian1, SUN Yu2, LIN Xun2, QIAN Tian2, Qu Wei2. Middle and Upper Cambrian in the East of Guizhou Province[J]. J4.