周口白垩系砂泥岩的化学特征及其构造学意义

高长林; 黄泽光; 张玉箴

doi:10.11743/ogg20050217

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周口白垩系砂泥岩的化学特征及其构造学意义
Geochemical characteristics of Cretaceous sandstone-mudstone and its importance to tectonics in Zhoukou basin
2005年26卷第2期页码：237-241
网络首发：2005-04-25，

纸质出版：2005
DOI： 10.11743/ogg20050217
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高长林, 黄泽光, 张玉箴. 周口白垩系砂泥岩的化学特征及其构造学意义[J]. 石油与天然气地质, 2005,26(2):237-241. DOI： 10.11743/ogg20050217.

Gao Changlin, Huang Zeguang, Zhang Yuzhen. Geochemical characteristics of Cretaceous sandstone-mudstone and its importance to tectonics in Zhoukou basin[J]. 2005, 26(2): 237-241. DOI： 10.11743/ogg20050217.

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

且来自物源区的成岩物质已经过充分的混合。

Abstract

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.