论文部分内容阅读
华北地区奥陶系沉积厚度大,分布广,以海相碳酸盐岩为主。本文所指范围北自河北平泉、山西浑源一带,南到豫西、淮南,西自太行山,东至郯庐断裂,约60余万平方公里。被覆盖的奥陶系分布面积约12万平方公里。笔者以20条露头剖面,26口钻井剖面,共计7845个牙形石标本的色变指数(CAI)值为基础,绘出《华北地区奥陶系牙形石CAI成熟度分区图》,指出有机物质的变质程度和有利于生成石油、天然的区域,为寻找石油、天然气提供可用的资料。
Ordovician sediments in North China are thick and widely distributed, mainly marine carbonate rocks. The scope of this paper refers to the north of Hebei Pingquan, Shanxi Hunyuan area, south to the west of Henan, Huainan, west from the Taihang Mountains, east of the Tan-Lu fault, about more than 60 million square kilometers. The Ordovician covered area of about 120,000 square kilometers. Based on the CAI values of 20 alluvial samples from 20 outcrop sections and 26 drilling sections, a total of 7845 conodont specimens were drawn, and the “CAI maturity zonation map of Ordovician conodont in North China” was drawn. It is pointed out that organic The extent of the deterioration of the material and the area conducive to the formation of oil and natural resources, in order to find available oil and gas information.