南川铝土矿沉积相特征  

Sedimentary characteristics of the Nanchuan bauxite deposit,Chongqing

作　　者：陈阳[1,2] 尹福光[2] 李军敏[2] 李再会[2] 贾德龙[3] 廖朝贵[2] 

机构地区：[1]中国地质科学院,北京100037 [2]成都地质矿产研究所,四川成都610081 [3]中国地质大学(北京),北京100083

出　　处：《沉积与特提斯地质》2012年第1期106-112,共7页Sedimentary Geology and Tethyan Geology

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.

关 键 词：南川 铝土矿 沉积相 陆缘近海湖 

分 类 号：P618.45[天文地球—矿床学]