地质与勘探2018，Vol.54Issue(3)：522-534,13.
贵州福泉高洞铝土矿床成矿地质地球化学特征
Geological and Geochemical Characteristics of Mineralization in the Gaodong Bauxite Deposit, Fuquan,Guizhou Province
摘要
Abstract
The bauxite deposit in the Gaodong area of Guizhou Province is one of the newly discovered mid-sized bauxite deposits in recent years.Its ore-bearing strata are the Jiujialu Formation of the Lower Carboniferous.Layered and layered-like bauxite lies on the ancient erosion surface of the car-bonate rocks in the Upper Devonian System,contacting the overlying Liangshan Formation of the Middle Permian System and underlying Gaopochang For-mation of the Upper Devonian System in a disconformable manner.The genesis of the deposit is of an ancient weathering crust depositional type.Analyzing the characteristics of Ga,Ba,Sr and Th contents and B / Ga,Rb / K and V / Zr ratios in the ore-bearing rocks suggests that the bauxite formed in a con-tinental sedimentary setting.The features δCe,Ni / Co,Th / U,Sr / Cu and V / Cr reveal that the diagenesis and mineralization process of the bauxite was in an oxidative environment.The positive correlation between Al and Zr,Hf,Nb,Ta,Th and U in the ore-bearing rocks indicates that the bauxite has the same migration and significant enrichment characteristics.The content of trace elements in the ore-bearing rock series is strongly enriched compared with that of the carbonate rocks of underlying strata Gaopochang Formation.Compared with the value of Li Tong,the high-temperature metallogenic elements (W,Sn,Mo and Bi),high-field strength elements (Nb,Ta,Th,U,Hf and Zr),clay mineral easily adsorbed elements (Li and V) and the high-grade ge-ochemical background element (Sb) in fine-grained rocks are highly enriched.Fractionation of LREE and HREE is obvious.It is inferred that the migra-tion rate of HREE with smaller ionic radius is larger than LREE with larger ionic radius in the process of secondary weathering leaching.关键词
铝土矿/地质地球化学特征/成矿环境/高洞/贵州/福泉Key words
bauxite/characteristics of geology and geochemistry/metallogenetic environment/Gaodong area/Guizhou Province/Fuquan分类
天文与地球科学引用本文复制引用
金中国,郑明泓,刘玲,骆军,董光贵,陈兴龙..贵州福泉高洞铝土矿床成矿地质地球化学特征[J].地质与勘探,2018,54(3):522-534,13.基金项目
国家十二五科技支撑计划重点项目(编号:BAB201104B04)、贵州省地勘基金项目(编号:ZZKC2012-06)和贵州省公益性、基础性项目(编号:2016-07)联合资助. （编号:BAB201104B04）
