滇西蚂蚁堆稀土矿区地貌单元划分及其控矿作用  

Landform unit division and its ore-controlling effect in Mayidui rare earth mining area,West Yunnan

作　　者：杜小波 包大林 廖志凯 洪鑫科 覃勇凯 张兴桐 张黎 官斌 DU Xiaobo;BAO Dalin;LIAO Zhikai;HONG Xinke;QIN Yongkai;ZHANG Xingtong;ZHANG Li;GUAN Bin(Geological Team No.209,Geological Bureau of Yunnan Nuclear Industry,Kuming 650032,Yunnan,China;Yunnan Three Rare Mineral Resources Exploration and Evaluation Engineering Research Center,Kunming 650032,Yunnan,China)

机构地区：[1]云南省核工业二○九地质大队,云南昆明650032 [2]云南省三稀矿产资源勘查评价工程研究中心,云南昆明650032

出　　处：《矿产与地质》2024年第3期402-407,共6页Mineral Resources and Geology

基　　金：云南省地质勘查基金项目“云南省临沧市蚂蚁堆地区稀土矿产资源调查评价”(编号:D202006)和“云南省临沧市蚂蚁堆地区稀土矿普查”(编号:K202103)共同资助。

摘　　要：滇西蚂蚁堆地区位于横断山脉中南段,属中等切割的中山地貌区,地形呈阶梯状起伏。据古夷平面划分为2个一级地貌单元,每个地貌单元进一步划分为缓坡地带和陡坡地带。该区为临沧花岗岩体分布区,其中三叠纪黑云二长花岗岩风化壳全风化层是稀土元素(SREO)赋矿层位,经过对该区花岗岩风化壳施工探矿工程取样分析,结果表明风化壳离子吸附型稀土矿主要分布在Ⅰ级夷平阶地缓坡地带。地形地貌对风化壳离子吸附型稀土矿的控制极为明显。蚂蚁堆地区地貌单元划分及其对风化壳离子吸附型稀土矿的控制作用,可为同类矿床地质勘查提供参考。Mayidui area in West Yunnan is located in the central-south section of Hengduan Mountain Range,belonging to the medium-cutting Zhongshan landform area,and the terrain is step-like and undulating.According to the ancient flattened plane,it is divided into two first-class landform units,and each landform unit is further divided into gentle slope area and steep slope area.The study area is the distribution area of Lincang granite body,in which fully weathered layer of the Triassic biotite adamellite is the hosted layer of rare earth element(SREO).After sampling and analysis of the granite weathered crust prospecting project in this area,the result shows that the weathered crust ion adsorption rare earth ore is mainly distributed in the gentle slope of the first-class level terrace.The terrain and topography have a very significant controlling effect over the ion adsorption type rare earth ore in weathered crust.The landform unit division of Mayidui area and its ore-controlling effect over ion adsorption type rare earth ores in weathered crust can provide a reference for the geological exploration of similar deposits.

关 键 词：离子吸附型稀土矿 地貌单元划分 控矿作用 滇西蚂蚁堆地区 

分 类 号：P618.7[天文地球—矿床学]