| 韦访,周辉,李活松,蒙家锋,覃良朝,黄光琼.广西靖西三合沉积铝土矿成矿环境研究[J].贵州地质,2022,39(4):342-352 |
| 广西靖西三合沉积铝土矿成矿环境研究 |
| Study on Metallogenic Environment of Sedimentary Bauxite Deposit in Jingxi，Guangxi |
| 投稿时间：2022-07-16 |
| DOI： |
| 中文关键词: 沉积铝土矿 成矿环境 含矿岩系 矿物特征 微量元素 |
| 英文关键词:Sedimentary bauxite Metallogenic environment Ore-bearing rock series Mineral characteristics Trace elements |
| 基金项目:广西壮族自治区地质矿产局“桂西地区沉积型铝土矿控矿因素、成矿规律与找矿预测研究”(桂地矿综研〔2021〕85 号)、广西关键矿产资源深部勘查人才小高地(桂组通字〔2019〕85号，2019—2023年)。 |
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| 中文摘要: |
| 在分析沉积铝土矿含矿岩系的基础上，从岩性组合与矿石矿物组成和赋存形态及微量元素分析入手，通过镜下观察与沉积环境反应敏感元素特征分析认为含矿岩系自下而上岩性由泥岩(铁铝质泥岩)→铁铝岩→铝土矿→炭质泥岩(煤)→灰岩，具有“铁-铝-泥-灰”的特征，沉积环境由陆相到海相的转变；沉积铝土矿中硬水铝石主要为风化成因，成矿物质来源有原地残积亦有异地沉积，底板铁质铝土质泥岩为强烈红土化产物，顶板铝土质泥灰岩为还原环境下的产物；Ga、Sr、Ba微量元素与Sr/Ba、Rb/K、V/Zr、Zr/Cu比值分析表明原生铝土矿和底板铁质铝土质泥岩沉积环境为陆相，顶板铝土质泥灰岩更多表现为海相沉积。 |
| 英文摘要: |
| Based on the detailed analysis of ore-bearing rock series in the sedimentary bauxite，on the basis of the lithology combination，ore mineral composition，the occurrence mode and with the analysis of trace elements by the microscopic observation and analysis of characteristics of sedimentary environment sensitive element that is from bottom to top in ore-bearing lithology by mudstone(iron aluminum mudstone)- iron and aluminum rock - bauxite to carbonaceous mudstone(coal)，limestone，The sedimentary environment changed from continental facies to Marine facies with the characteristics of “iron-aluminum-mud-ash”The hard bauxite in sedimentary bauxite is mainly of weathering origin，and the source of ore-forming materials is in situ residual deposits and different depositsThe mudstone of iron and aluminum soil in the floor is the product of intense laterite，and the marl of aluminum soil in the roof is the product of reduction environmentThe analysis of Ga，Sr，Ba trace elements and Sr/Ba，Rb/K，V/Zr，Zr/Cu ratios shows that the sedimentary environment of primary bauxite and floor mudstone is continental facies，while the roof mudstone is more Marine facies |
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