南川铝土矿沉积相特征

详细信息

Sedimentary characteristics of the Nanchuan bauxite deposit, Chongqing

1. Chinese Academy of Geological Sciences, Beijing 100037, China;
2. Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, Sichuan, China;
3. China University of Geosciences, Beijing 100083, China

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。
- 南川 /
- 铝土矿 /
- 沉积相 /
- 陆缘近海湖
Abstract: 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 contents of 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.
- Nanchuan /
- bauxite deposit /
- sedimentary facies /
- epicontinental offshore lacustrine environment