The bauxite deposit in Danping,located at the Zheng'an bauxite belt,is in the northern part of central Guizhou-southern Chongqing metallogenic belt,an important mineralization with good mineralization conditions.The geological characteristics,ore-controlling factors,mineralization enrichment rules and prospecting criteria of the deposit are analyzed,and the genesis of the deposit is discussed.The results show that it is a sedimentary deposit.Its metallogenic material mainly comes from the mud shale of ore-bearing rock series (Dazhuyuan Formation) sedimentary basement Hanjiadian Group.The bauxite deposit in Danping is a large deposit rich in gallium,estimating resource of 22.289 1 million tons,which is a large bauxite deposit.Among the ore body,the type of low iron high sulfur occupies first place,low iron low sulfur comes second.The main ore is clastic type,then half an earthy,oolitic and massive compacted.All of ore bodies are distributed in the middle-upper part of Dazhuyuan Formation of Middle Permian,which is the most intuitive and important ore-controlling factors in study area.It is also the main criteria and basis of bauxite deposit prospecting and exploitation in this area.%旦坪铝土矿位于黔中-渝南铝土矿成矿带北段的正安铝土矿带,其矿带内成矿地质条件优越,矿产资源富集.通过系统分析该矿床的地质特征,查明控矿因素,总结矿化富集规律及找矿标志,探讨了矿床成因.研究表明,旦坪铝土矿为沉积型矿床,其成矿物质主要来源于含矿岩系(大竹园组)沉积基底的韩家店群泥页岩;矿床以低铁高硫型为主,次为低铁低硫型,估计资源量2 228.91万t,为一大型铝土矿矿床.矿石自然类型以碎屑状为主,其次有半土状、豆鲕状和致密状.典型的成矿层位专属性是研究区内最直观、最重要的成矿控制因素,也是该区进行铝土矿找矿勘探和开发利用的主要标志和依据.
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