摘要
通过野外观察,在南川地区铝土矿含矿岩系中识别出一层底砾岩和一层分流河道沉积,结合岩性特征和B、Sr、Ba、Ga、Rb、MnO、TiO2等的地球化学特征,对南川地区铝土矿含矿岩系的沉积相进行了划分。认为南川地区铝土矿形成于中二叠世海侵过程中的陆缘近海湖环境,为沉积型铝土矿床。
A succession of basal conglomerates at the base and distributary channel deposits at the uppermost part of the bauxite-bearing rock series in the Nanchuan region have been recognized on the basis of the investigation of abundant field outcrops in Nanchuan, Chongqing. Sedimentary facies analysis on the basis of lithology and contentsof the elements such as B, Sr, Ba, Ga, Rb, MnO and TiO2 shows that the Nanchuan bauxite deposit is assigned to the sedimentary bauxite deposit rested in the epicontinental offshore lacustrine environments during the Middle Permian transgressions.
出处
《沉积与特提斯地质》
CAS
CSCD
2012年第1期106-112,共7页
Sedimentary Geology and Tethyan Geology
关键词
南川
铝土矿
沉积相
陆缘近海湖
Nanchuan
bauxite deposit
sedimentary facies
epieontinental offshore lacustrine environment
