摘要
发生在晚白垩世的仪征运动,使泰州组不整合覆盖于赤山组或紫红色浦口组之上。促使了本区南断北超、南陡北缓的箕状断陷的形成与发展,由此导致本区泰一段冲积扇、扇三角洲、辫状河三角洲、半深湖泊沉积相当发育。从盆地边缘到盆地中心,沉积相逐渐由冲积扇沉积渐变为扇三角洲、浅湖、半深湖相沉积。泰二段沉积时期是本区最大湖侵期,半深水湖泊相最为发育。通过对重矿物组合、砂(砾)岩百分含量等值线图及沉积相展布格局等分析认为,本区泰州组沉积时期的物源主要来自南部的苏南隆起、北部的建湖隆起。
Yizheng movement occurring in Late Cretaceous led to the unconformable superimposition of Taizhou Formation upon Chishan Formation or Pukou Formation. In this depression, the southern part is characterized by faulting and the northern part by overlapping. As a result, the sediments of fan, fan delta, braided delta and semi-deep lake are well developed in 1^st Member of Taizhou Formation. From the edge to the center of the basin, the sedimentary facies change gradually from fan to fan delta or shallow semi-deep lake. During the deposition of 2^nd Member of Taizhou Formation, there occurred a big lake transgression in the Gaoyou and Haian Sags, and the semi-deep lacustrine facies was well developed. Based on an analysis of the contour maps of garnet and staurolite, the percentage of sand stones （conglomerates）, and the distribution pattern of sedimentary facies, the authors have reached the conclusion that the material sources of the sediments must have been mainly derived from the south of Sunan uplift and the north of Jianhu uplift.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2007年第6期627-634,共8页
Acta Geoscientica Sinica
关键词
苏北盆地
高邮凹陷
海安凹陷
泰州组
沉积相
物源
Subei basin, Gaoyou sag, Haian sag, Taizhou formation, sedimentary facies, Provenance
