贵州正安铝土矿基底地貌控矿作用及找矿意义——以正安旦坪铝土矿床Ⅰ号矿体为例  

The Ore-controlling Action of Basement Geomorphology on Zheng’an Bauxite Deposit in Guizhou and Its Prospecting Significance——Taking No.1 orebody of Danping bauxite deposit as an example

作　　者：李源洪[1] 杜红毅[1] 李信念 刘旭[1] 胡鹏 LI Yuan-hong;DU Hong-Yi;LI Xin-nian;LIU Xu;HU Peng(No.106 Geological Party,Bureau of Geology and Mineral Resources,Chinese Academy of Geological of Guizhou Province,Zunyi 563000,Guizhou,China)

机构地区：[1]贵州省地质矿产勘查开发局106地质大队,贵州遵义563000

出　　处：《贵州地质》2021年第2期169-176,共8页Guizhou Geology

摘　　要：本文主要基于对正安地区最为典型的旦坪铝土矿床Ⅰ号矿体勘探146个工程的矿系厚度、矿体厚度、三氧化二铝、铝硅比值的系统统计,研究该区基底古地貌特征,探究其与矿体厚度、三氧化二铝、铝硅比值的相关关系,并分析其控矿作用机理与找矿意义。研究表明旦坪铝土矿的基底古地貌总体表现出南高北低的特征,北部表现为碳酸盐岩古岩溶地貌,起伏在515 m间,南部表现为硅酸盐岩风化侵蚀地貌,起伏05 m。矿体厚度、品质与基底地貌凹地深度呈现明显的正相关关系,凹地深度越深往往矿体越厚,微地貌凹地内矿体经历了更长时间的淋滤作用改造,矿石品质更高。因此笔者认为正安地区铝土矿的勘查应特别注重基底古地貌研究,将勘查工程布置于溶蚀凹地内,以提高见矿率,探寻高品质矿体。This paper is mainly based on the systematic statistics of ore series thickness,ore body thickness,aluminum oxide and aluminum silicon ratio of 146 projects for the most typical Danping bauxite deposit in Zheng’an area.Characteristics,explore its correlation with ore body thickness,aluminum oxide,aluminum silicon ratio,and analyze its ore-controlling mechanism and prospecting significance.Studies have shown that the basement paleo-geomorphology of Danping bauxite mine generally exhibits characteristics of high in the south and low in the north.The northern part is represented by carbonate paleokarst topography,which fluctuates between 5 and 15m,and the southern part is represented by silicate weathering erosion.The fluctuation is 05 m.The thickness and quality of the ore body have an obvious positive correlation with the depth of the basement recession.The deeper the recession depth,the thicker the ore body.The ore body in the micro landform recession has undergone a longer period of leaching transformation,and the ore quality is higher.Therefore,the author believes that the exploration of bauxite in Zheng’an area should pay special attention to the study of basement paleo-geomorphology,and arrange the exploration project in the dissolution depression to increase the ore-seeing rate and explore high-quality ore bodies.

关 键 词：铝土矿 基底地貌 控矿作用 找矿意义 旦坪 贵州 

分 类 号：P618.45[天文地球—矿床学] P531[天文地球—地质学]