贵州省凯里地区铝土矿床控矿因素研究

凯里地区铝土矿是产于碳酸盐岩侵蚀面上的一水硬铝石型沉积矿床。该区域在地质历史时期，经历了多次地壳运动的复杂演变。铝土矿产于上泥盆统高坡场组（D3gp）白云岩侵蚀面上，含矿层位为中二叠统梁山组（P2l）。在阐述了该区铝土矿的成矿地质背景和矿床地质特征的基础上，对本区铝土矿床形成过程中的主要控矿因素进行了分析，认为该形成过...

Ore-controlling Factors of the Bauxite Deposits in the Kaili Area, Guizhou Province

Abstract:The bauxite deposit in the Kaili area is of the sedimentary type which formed on the eroded surface of carbonate. This area underwent manytimes of crustal movement during the geological history. Bauxite ores occur on the dolomite eroded surface of the Upper Devonian Gaopochang Formation,and ore-controlling strata are middle Permian Liangshan formation. Based on geologic and ore-forming background and bauxite deposit characteristics inthis area, this article analyses the main ore-controlling factors of the formation process. It is suggested that the process can be roughly divided into three phases: the material forming phase, the deposition and preservation phase and the secondary enrichment phase. The primary ore-controlling factors are weathering, paleo-climate, hydrogeology, paleo-landform, and biology for the first phase, marine transgressions and karst for the second phase, andhydrogeology and faulting for the third phase, respectively.