试论松辽盆地湖盆三角洲沉积类型

NOTED ON TYPES OF DELTAIC DEPOSITION OF LAKE BASIN IN SONGLIAO BASIN

石国平 矫革峰 张书麟

Shi Guoping Jiao Gefeng Zhang Shulin

吉林省油田管理局勘探开发设计研究院 2. 大庆石油学校

Institute of Exploration and Developmant, Administration of Oil Fields of Jilin Province 2. Daqing School of Petroleum

松辽盆地是中国东部中、新生代发育起来的大型断、坳陷沉积盆地,以陆相含油著称于世。在它的演化历史中,曾经历过多次构造上升与下降运动,形成巨厚的多旋回沉积岩系。其中三角洲相十分发育。近十年来,许多人对不同历史时期形成的三角州进行过大量报导和描述。其中王衡鉴等人较系统地对松辽湖盆三角洲进行了论述和分类。本文所论及的是松辽盆地南部出现较多,形成于早白垩世的三角洲。尽管这些三角洲之间千差万别,但从沉积古地理背景出发,可将其分为三大类。本文的分类与裘亦南等人的陆相三角洲分类大致相同。

Based on history of growing and declining of lake basin, deltas of Early Cretaceous lake basin in Song-Iiao basin are classified into three catagories : 1) Retreated deltas formed during lake transgression. 2) Prograded deltas formed during lake regression. 3) Fan deltas formed between lake transgression and regression. Describing different depositional processes, the diverse patterns of vertical facies sequences are shown as effective criteria for distinguishing the three types of deltas.

https://doi.org/10.11781/sysydz198404279