摘要
为了探讨宁夏六盘山地区白垩纪地层演化的规律,进行了实际环境的地质调查.发现宁夏六盘山地区白垩纪地层广泛发育,自下而上划分为三桥组、和尚铺组、李洼峡组、马东山组、乃家河组;从沉积特征、地层层序、沉积相表明,六盘山群为一套冲积扇-内陆湖泊相的碎屑岩、泥岩、碳酸盐岩夹膏岩沉积;从岩性组合、沉积特征及总体向上变细的垂向沉积序列看,六盘山群是在盆地持续下沉、湖水不断加深、沉积物供给较为充足的条件下形成的.
In order to discuss the regularities of the cretaceous stratum change process in Linpanshan, a lot of practical environment investigations were made. It has been found that the cretaceous system is widely distributed in Liupanshan region including Sanqiao Fm, Heshangpu Fm, Madongshan Fm, and Naijiahe Fm. The Liupanshan group is fluviolacustrine facies including, silicarenite, mudstone, carbonates intercalated with gypalm in divisional schemes, and it turns out to have been formed by continuously sinking deposit basins.
出处
《宁夏工程技术》
CAS
2006年第1期1-3,共3页
Ningxia Engineering Technology
关键词
六盘山地区
白垩纪
沉积相
沉积环境演化
层序特征
the Liupanshan region
cretaceous system
sedimentary facies
sedimentary enviroment change
divisional Schemes.
