贵州遵义铝土矿(带)成矿条件及成因分析  

Metallogenic Factor and Origin in Zunyi Bauxite Belt,Guizhou

作　　者：朱永红[1] 翁申富[1] 李沛刚[1] 赵爽[1] 韩忠华[1] 陈强[1] 杨时强 Zhu Yonghong;Weng Shenfu;Li Peigang;Zhao Shuang;Han Zhonghua;Chen Qiang;Yang Shiqiang(Geological Team 106, Guizhou Bureau of Geology and Mineral Exporation and Development, Zunyi Guizhou 563000, China)

机构地区：[1]贵州省地质矿产勘查开发局一0六地质大队,贵州遵义563000

出　　处：《地质科技情报》2018年第1期177-183,共7页Geological Science and Technology Information

基　　金：贵州省地矿局地勘基金项目“遵义市南部铝土矿成矿作用和成矿规律研究”

摘　　要：根据已取得的地质成果,应用现代沉积学的理论与方法,对贵州遵义铝土矿(带)成矿条件及成因进行了分析。认为铝土矿的形成,是在古生代碳酸盐岩所形成的古岩溶基底上,于有利的古构造、古地理、古气候等先决条件下,以白云岩和页岩为成矿原岩风化剥蚀的残坡积物,经钙红土化、红土化的成矿作用,脱硅去铁、脱钙去镁、脱钾富铝后,成为红土型铝土矿;随着早石炭世海侵的到来,不断发生水解作用,同时经水体短距离搬运再沉积在古岩溶坑洼内,形成三水型铝土矿;尔后盖层加厚,增温脱水,进而形成一水硬铝石型铝土矿床。矿床成因类型属古风化壳型岩溶坑洼异地沉积一水硬铝石铝土矿床;其成矿时代归属早石炭世大塘期旧司时。According to the geological achievements available,this paper uses the theories and ways of sedimentology and discusses the metallogenic factor and origin of Zunyi bauxite belt.The paper states that the bauxite is most probably formed on ancient karst basement from carbonate rocks in Palaeozoic Era.When paleostructure,paleogeography and paleoclimate are advantageous,the eluvial diluvium experiences laterization of calcium,degraded silicon and iron,decalcification and degraded magnesium,thus forming laterite-type bauxite.Then,the transgression that happened in Carboniferous caused the continuous hydrolyzation,which moved deposits into the pothole of ancient karst to form the gibbsite deposit.Finally,the upper terrane became thick,calefacient and dehydrated,and consequently formed the diasporite bauxite deposit.The genetic type of ore deposit is attributed to sedimentary bauxite deposit of former weathering crust and pothole of ancient karst.Its metallogenic epoch is thus determined to be Early Carboniferous Datangian.

关 键 词：铝土矿 成矿条件 成因 遵义 贵州 

分 类 号：P618.45[天文地球—矿床学]