贵州黄平县铁厂沟铝土矿沉积环境特征

Sedimentary environment characteristics of Tiechanggou bauxite deposit in Huangping county of Guizhou

以黄平铁厂沟铝土矿区大井、包老、鞭炮厂三条比较典型的含矿岩剖面为研究对象,对剖面沉积特征、微量元素、稀土元素等进行分析,认为本区铝土矿沉积环境总体为近海泻湖。含矿岩系中Sr值、Sr/Ba比值及δEu异常特征显示本区铝土矿在形成过程中受海水强烈影响;对Th/U值、稀土元素总体特征分析认为处于矿区北部的大井剖面、西北部的包老剖面地势较高,而处于矿区东南部的鞭炮厂剖面地势较低。综合分析认为矿区北部是成矿物源碎屑主要来源,可作为下步勘探的有利区域。

Dajing, Baolao and Bianpaochang are chosen to analyze sedimentary environment of Tiechanggou bauxite. Dealing with the sedimentary characters of ore - bearing rock series, trace element and rare earth element in Tiechanggou bauxite, it is thought that the sedimentary environment is lagoon by the coastal water. The characters of trace element such as Sr, Sr/Ba and δEu show that sea water have intensity influence on mineralization. Besides, characteristics of Tu/U and rare earth element show that Dajing topography of sedimentary environment in north and Baolao topography in northwest of mine area are higher and Bianpaochang topography in southeast of it is lower. Synthetically, the results show that the mineral material is derived from the north area of Tiechanggou district, where we thought is the superior region ior bauxite prospecting.