文献类型：期刊文献

中文题名：黔中清镇云峰铝土矿矿物学及地球化学特征研究

英文题名：Research of the Mineralogical and Element Geochemical Characteristics of Bauxite in Yunfeng,Qingzhen,in Central Guizhou

作者：张敏 杨梧

第一作者：张敏

机构：[1]贵州理工学院资源与环境工程学院,贵州贵阳550003

第一机构：贵州理工学院资源与环境工程学院

年份：2023

卷号：25

期号：12

起止页码：199-205

中文期刊名：绿色科技

外文期刊名：Journal of Green Science and Technology

基金：贵州省科学技术厅基础研究计划(黔科合基础[2017]1410)。

语种：中文

中文关键词：常量元素;微量元素;物源;铝土矿;成矿环境

外文关键词：major elements;trace elements;parent rock;bauxite;metallogenetic environment

摘要：黔中清镇云峰铝土矿位于扬子准地台-黔北台隆-贵阳复杂构造变形区。通过野外地质调查、光薄片镜下鉴定、XRD、扫描电镜和元素地球化学分析等手段,对云峰铝土矿矿物学特征和地球化学特征进行了研究。结果表明:主要矿物为硬水铝石、高岭石、绿泥石,其次为软水铝石、黄铁矿,铝土矿常量元素以Al_(2)O_(3)、SiO_(2)和Fe_(2)O_(3)为主,TiO_(2)、MgO和P_(2)O_(5)含量次之。风化过程中Zr、Cr、Nb、Hf等微量元素明显富集,Zr与Hf以及Nb与Ta具有较好的正相关关系。云峰铝土矿是以娄山关组白云岩为主,并有其余物源混入的多物源体系。矿床形成于贫氧的、还原性的海相沉积环境中。
Yunfeng bauxite in Qingzhen,central Guizhou is located in the complex tectonic deformation area of Yangtze Platform,Tailong-Guiyang in northern Guizhou.The mineralogical and geochemical characteristics of the bauxite in Qingzhen were investigated through the handle specimen observation,thin section analysis,XRD,SEM and element geochemistry.The mineral analyses reveal that diaspore,kaolinite and chlorite are the major minerals in the bauxite with small amounts of boehmite and pyrite.Geochemical investigations reveal that the main components in the bauxite are Al_(2)O_(3),SiO_(2)and Fe_(2)O_(3);the minor components are TiO_(2),MgO and P_(2)O_(5).In the process of weathering,some trace elements,such as Zr,Cr,Nb and Hf,are enriched.Zr vs Hf and Nb vs Ta display higher positive correlation.Yunfeng Bauxite is a multi-provenance system mainly composed of dolomite of Loushanguan Formation and mixed with other provenances.Ore deposit formed in a O-poor,reductive Marine sedimentary environment.