文献类型：期刊文献

中文题名：贵州省沉积型铝土矿“移硅沉铁富铝”成矿模式探讨

英文题名：Discussion on the metallogenic model “Si migration - Fe precipitation -Al enrichment” of sedimentary bauxite deposits in Guizhou Province

作者：杨涛 黄波 朱和书 马力克

第一作者：杨涛

机构：[1]贵州理工学院资源与环境工程学院,贵州贵阳550003;[2]贵州有色金属和核工业地质勘查局物化探总队,贵州都匀558000;[3]贵州省地质资料馆,贵州贵阳550000

第一机构：贵州理工学院资源与环境工程学院

年份：2020

卷号：34

期号：4

起止页码：696-703

中文期刊名：矿产与地质

外文期刊名：Mineral Resources and Geology

收录：CSTPCD

基金：贵州省科技计划项目“推进贵州地质资料大数据应用产业化研究”(黔科合〔2016〕支撑2809);贵州理工学院高层次人才科研启动项目(XJGC20161101)共同资助。

语种：中文

中文关键词：铝土矿;“移硅沉铁富铝”;成矿模式;贵州

外文关键词：bauxite deposit;“Si migration-Fe perticipation-Al enrichment”;metallogenic model;Guizhou

摘要：通过对贵州铝土矿的成矿地质背景、成因机制及前人的模拟实验等综合研究,认为广西运动末期使贵州地壳隆升和湿热的低纬度环境,地表岩石接受广泛的风化剥蚀,残留了以铝硅铁氧化物为主的红土化风化壳。经流水搬运集中于富含古生物的黔中—黔东—黔北地区泻湖盆(湾)中弱酸—还原性沉积环境,进行了重要“移硅沉铁富铝”的元素迁移与富集;而晚古生代早中期背景下的地壳稳定,形成了厚层—巨厚层富铝连续沉积层,造就了贵州4个重要的大中型—超大型矿集区,成为我国重要的铝资源大省;主要赋矿地层为下石炭统九架炉组—中下二叠统大竹园组、梁山组,形成了早石炭—早中二叠世是贵州铝土矿形成的特定时期。因此,晚古生代中晚期地层中可能存在隐伏的铝土矿,还可能存在新的大型一超大型矿集区,在全国范围内更可能存在相似条件下的大规模铝土矿。
Based on the comprehensive study of the metallogenic geological background,genetic mechanism and previous simulation experiment of bauxite deposits in Guizhou Province,it is considered that the crust is uplifted at the end of Guangxi movement in Guizhou Province.The surface rocks are extensively weathered and eroded,and the laterite-type weathering crust is dominated by aluminum,silicon and iron oxides.They are transported by water flow and concentrated in the weak acid-reducing sedimentary environment at the lagoon basin(bay)in the cental,eastern and northern parts of Guizhou,where there is rich in paleobiology.At the same time the important element migration and enrichment of"Si migration-Fe precipitation-Al enrichment"is carried out.The crustal stability in the early and middle of the late Paleozoic has resulted in the formation of thick-superthick continuous aluminum-rich sedimentary layers.Four important ore concentration areas of medium-large-superlarge scale are formed in Guizhou and it becomes an important aluminum resource province in China.The main ore-bearing strata are Jiujialu formation of lower Carboniferous,Dazhuyuan formation and Liangshan formation of middle and lower Permian.The Early Carboniferous and Early and Middle Permian are the specific periods of bauxite formation in Guizhou.Thus,it is indicated that there may be the concealed bauxite deposits in the middle and late Paleozoic strata,moreover,there may also be some new large-superlarge scale ore concentration areas.Large-scale bauxite deposits are more likely to exist under the similar condition in the whole country.