| 张志玺.贵州省三联铝土矿床地质特征及
控矿因素浅析[J].地质与勘探,2020,56(1):17-25 |
| 贵州省三联铝土矿床地质特征及
控矿因素浅析 |
| Geological characteristics and ore-controlling factors of the Sanlian bauxite deposit in Guizhou Province |
| 投稿时间：2019-01-25 修订日期：2019-10-09 |
| DOI：10.12134/j.dzykt.2020.01.002 |
| 中文关键词: 地质特征 控矿因素 找矿标志 铝土矿 贵州省 |
| 英文关键词: geological characteristics, ore-controlling factor, prospecting indicator, Sanlian bauxite, Guizhou Province |
| 基金项目:中国地质调查局成都地质调查中心地质调查项目“乌蒙山区地质矿产综合调查”二级项目之子项目“贵州乌蒙山区1:5万店子场（编号：G48E006018）、大关（编号：G48E007017）、六厂（编号：G48E007018）3幅区域地质调查项目（编号：DD20160019-04）”联合资助 |
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| 中文摘要: |
| 贵州省三联铝土矿位于黔北隆起区，是近年在遵义-息烽的铝土矿成矿区探明的小型矿床之一。通过系统分析该矿床的地质特征，查明控矿因素，总结了找矿标志，探讨了矿床成因。研究表明：①三联铝土矿含矿岩系为下石炭统九架炉组中下部，铝土矿呈层状产于上寒武统-下奥陶统娄山关组碳酸盐岩古侵蚀面之上，与上覆下石炭统上司组呈整合接触，矿床成因类型为古风化壳沉积型；②含矿岩系中元素Sr/Cu比值与化学蚀变指数（CIA）特征显示铝土矿主要形成于气候温暖、潮湿的陆相沉积环境；③矿石自然类型主要为豆鲕状、砾状结构，铝土矿物主要为一水硬铝石、三水铝石；④矿床的形成主要受地层岩性、背斜构造、古地貌、古气候等因素控制；⑤找矿标志:地层标志、岩性标志、古侵蚀间断面标志、褶皱构造标志等。 |
| 英文摘要: |
| The Sanlian bauxite deposit is located in an uplift area of northern Guizhou Province，which is one of the small-scale deposits explored in the Zunyi-Xifeng bauxite metallogenic area recent years. The purpose of this paper is to make a systematic analysis of the geological characteristics of the deposit，clarify its ore controlling factors, summarize prospecting indicators，and discuss genesis of the deposit. The results show that the ore bearing rock series lies in the middle and lower part of Jiujialu Formation of Lower Carboniferous，and the bauxite occurs on the ancient eroded surface of carbonate rock of Loushanguan Formation of Upper Cambrian-Lower Ordovician, in conformable contact with Shangsi Formation of Lower Carboniferous strata. The genesis of the deposit is of sedimentary type with ancient weathering crust. The Sr/Cu ratio and chemical index of alteration (CIA) in ore bearing rock series suggest that the bauxite was formed in a continental sedimentary environment with warm and humid climate. The natural forms of the ore include bean，oolitic and pebble structure，and the bauxite mineral is dominated by diaspore and gibbsite. The formation of the deposit was mainly controlled by lithology，anticline structure，paleogeomorphology, and paleoclimate. Prospecting indicators include strata, lithology, palaeoerosion discontinuity, and folds. |
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