贵州主要铝土矿矿集区成矿特征对比研究  

The comparison study on metallogenic characteristics of the main bauxite-deposit-clustered areas in Guizhou province

作　　者：李艳桃[1,2] 肖加飞[1] 付绍洪[1] 赵志军[3] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳550002 [2]中国科学院大学,北京100049 [3]贵州省地矿局一〇四地质大队,贵州都匀558000

出　　处：《地质找矿论丛》2014年第4期489-494,共6页Contributions to Geology and Mineral Resources Research

基　　金：中国科学院战略性先导科技专项(编号:XDA08090200);矿床地球化学国家重点实验室项目(编号:SKLODG-ZY125-08)资助

摘　　要：贵州铝土矿资源丰富,是中国第二大铝土矿资源基地,其铝土矿资源量约占全国总量的17%;主要分布在修文—清镇、凯里—黄平、遵义—瓮安和正安—道真4个矿集区。对贵州4个铝土矿矿集区成矿特征的研究表明,铝土矿的含矿层位主要有3个(下石炭统、上石炭统和中二叠统),含矿层位在空间分布上具有由南向北、由西向东逐渐变新的特点;下伏地层提供了成矿物质和聚矿空间;矿床类型为古风化壳再沉积型,含矿岩段均为铝质岩段,开采矿物为一水硬铝石;矿石自然类型以土状,碎屑状和致密状为主,矿石工业类型以低铁低硫型矿石为主;3个矿集区铝土矿的化学组分和矿物组分相似,只是在含量上有所差别;铝土矿中的伴生有用元素较多,尤以Ga元素为代表,具有较大的经济价值。Bauxite resources is rich in Guizhou province which is the second largest bauxite base in China and whose bauxite resources is 17%of total Chinese bauxite resources. The bauxite is mainly distributed in the Xinwen-Qingzhen, the Kaili-Huangping, Zunyi-Wongan, Zhengan-Daozhen, the four bauxite-deposit-clustered areas. The Lower Carboniferous Series, Upper Carboniferous Series and Middle Permian Series are the main bauxite ore horizons. Spatially, the horizons became younger from south to north and from east to west. The underlying strata provided ore materials and accumulation space for the bauxite deposits which are the ancient weathering crust re-deposited bauxite deposits. The ore-bearing rock members are atl aluminous rock members. Diaspore is the main ore mineral. There are three natural kinds of ore, i.e. the earthy, detrital and massive ore and the ore low in Fe and S is the main industrial ore. The four bauxite-deposit-clustered areas are similar in chemical composition and mineral composition and only the ore grades are different. The bauxite is accompanied by more useful elements, especially Ga, which is of more economic value.

关 键 词：铝土矿 含矿岩系 成矿特征 矿集区 Ga元素 贵州省 

分 类 号：P613.22[天文地球—矿床学] P618.45[天文地球—地质学]