Reestablishment of Basin Framework on Member 2 of Kongdian Formation in Kongnan Area, Huanghua Depression
-
摘要: 孔南地区孔二段受到沧东断层、徐西断层等活动影响，地层结构遭受强烈的改造，原有湖盆结构发生了很大的变化。隆起区构造单元富泥质沉积，凹陷构造单元富砂质沉积，成为研究区孔二段的主要特征之一，也成为研究的难点。本文通过对研究区孔二段沉积厚度、岩相、沉积相、构造分析以及等时地层格架下的沉积体系展布规律分析等，对孔二段沉积时期湖盆结构进行了恢复，改变了以往认为孔店期为断陷产物的认识，得出孔二段沉积时期，湖盆总体为坳陷盆地，现今处于盆地中心的孔店隆起构造带为孔二期的古湖盆中心和沉降中心。这一结论对认识黄骅坳陷孔南地区盆地演化，成因机制和油气勘探具有重要的意义。Abstract: Member 2 of Kongdian Formation（Ek2） has been changed by lots of faults, such as Cangdong fault and Xuxi fault, etc. It greatly changed the original basin framework. Black mudstone and oil shale appeared on the uplift, while, stratum rich in gritstone detected in the Sunken area, as the most important characters, become difficult to research. Based on the equitime stratigraphic contrast, and a comprehensive analysis of the thickness, lithofacies, sediment facies, structure and sediment system of Member 2 of Kongdian Formation, conclusions have been made that the lack basin was depress basin, simultaneously, Kongdian uplift belt existed in the center of the basin now was the center of the lack basin and depocenter during the deposition of the Member 2. These conclusions are significant for clearing the basin evolution, its origin, petroleum and natural gas exploration.
-
点击查看大图
计量
- 文章访问数: 1609
- HTML全文浏览量: 7
- PDF下载量: 566
- 被引次数: 0
下载:
