摘要
白垩纪周口盆地的盆地原型应是山前凹陷盆地。钻井岩石中白垩系砂泥岩的石英、长石和岩屑含量的Q -F -L图解投点主要位于前陆盆地区;白垩系砂页岩的主要化合物数据主要投点于活动大陆边缘区;稀土总量和轻/重稀土含量之比变化不大,与俄罗斯地台砂岩、粉砂岩具相似的特征。因此,周口盆地白垩系沉积物的物源来自秦岭-大别造山带。
The prototype of Zhoukou Cretaceous basin should be of foredeep basin. In the Q-F-L graph, the plotted points of quartz, feldspar and lithoclast contents of Cretaceous sandstone-mudstone cored from wells are mainly located in foreland basin area. While the plotted points of the major compounds in Cretaceous sand-shale are mainly located in active continental margin area. The total contents of rare earth elements and the ratio of light/heavy rare earth elements change insignificantly, similar to the characteristics of sandstone and siltstone in Russian Platform. Therefore, it is believed that Cretaceous sediments in Zhoukou basin might have been sourced from Qinling-Dabie orogenic zone and the lithogenous materials come from the source area might have been thoroughly blended.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2005年第2期237-241,共5页
Oil & Gas Geology
基金
中国石化科技开发项目"秦岭 -大别造山带两侧盆地油气勘探选区研究"(P0 2 0 71 )
关键词
周口盆地
山前凹陷
地球化学
主要化合物
稀土元素
Zhoukou basin
piedmont depression
geochemistry
major compound
rare-earth element
