摘要
依兰—伊通地堑,由南段的岔路河断陷与北段的汤原、依兰、方正、尚志、胜利等断陷组成。南北两段在地质特征上有明显差异。南段为新生代残留断陷,北段为中新生代继承性断陷;南段为湖相细碎屑沉积,北段为湖沼相含煤沉积;南段第三纪有咸水藻分子,北段无咸水藻分子;南段有机质类型较好,北段有机质类型较差;南段生烃岩体积大,北段生烃岩体积小。
<ABSTRACT>: Yilan-Yitong Graben consists of Chaluhe fault subsidence on the south part and Tangyuan, Yilan, Fangzheng, Shangzhi & Shengli fault subsi-dences on the north Part. There are obvious differences in the geological features in both parts, in which the south belongs to Cenozoic relict fault subsidence and the north part belongs to Meso-Cenozoic relict fault subsi-dence . The south part has lake facies fine fragment sediments, the north part has lake basin bog facies coalbearing sediments, there are sal-ine water algal moleculars in the south and there are none in the north. The type of organic matter is better in the south and poorer in the north and the volume of source rock is large in the south, small in the north.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
1991年第3期1-4,12,共5页
Petroleum Geology & Oilfield Development in Daqing
关键词
石油
天然气
勘探
地质特征
: Faulted basin, Oi1 & gas exploration, Geological feature, Yi-lan-Yitong area
