重庆吴家湾铝土矿矿床地质特征及控矿因素探讨  

Geology and controls of the Wujiawan bauxite deposit in Nanchuan,Chongqing

作　　者：凌小明[1] 赵晓东[1] 李军敏[1] 陈莉[1] 吕涛[1] 

机构地区：[1]成都地质矿产研究所,四川成都610081

出　　处：《沉积与特提斯地质》2013年第4期95-99,共5页Sedimentary Geology and Tethyan Geology

基　　金：中国地质调查局渝东地区地质构造演化及铁铝基地研究(1212011085167)

摘　　要：重庆吴家湾铝土矿产于中二叠统梁山组(P2l)之下,呈假整合覆于中志留统韩家店组粉砂质页岩或中石炭统黄龙组灰岩之上。矿体产状与地层产状基本致,铝土矿呈土状、豆(鲕状)、致密块状、砾屑状。一水硬铝石为主要矿石矿物。控制铝土矿形成的主要因素为古环境、地形地貌、构造位置和地层。The ore-bearing rock series of the Wujiawan bauxite deposit in Nanchuan,Chongqing are overlain by the Middle Permian Liangshan Formation（ P2l）,and disconformably upon the silty shales of the Middle Silurian Hanjiadian Formation or the limestones of the Middle Carboniferous Huanglong Formation. This bauxite deposit is characterized by high SiO2,high S,high Fe and low grades of bauxite ores. The bauxite orebodies are in general agreement in occurrence modes with the associated strata,and the ores occur as the earthy,pisolitic（ oolitic）, densely massive and gravelly forms. The ore-controlling factors of the bauxite deposit include palaeoenvironmental, palaeogeomorphological,structural and stratigraphic factors. The results of research in this study may be helpful for the exploitation and utilization of the bauxite deposits in Wujiawan and throughout southern Chongqing.

关 键 词：铝土矿 地质特征 控矿因素 吴家湾 重庆 

分 类 号：P618.45[天文地球—矿床学]