云南省龙陵县茅草园稀土矿地质特征及成矿条件浅析  

Geological Characteristics and Metallogenic Conditions of Maocaoyuan Rare Earth Mine in Longling County,Yunnan Province

作　　者：何黎[1] 吕庆松 杨啟岳 邢永辉[1] 林相荣 杨春明 张利 He Li;Lu Qingsong;Yang Qiyue;Xing Yonghui;Lin Xiangrong;Yang Chunming;Zhang Li(Baoshan Geological and Mineral Resources Institute of Yunnan Province,baoshan 678000,China;Yunnan Huarifu Geological Mining Co.,Ltd.,Baoshan Branch.,Baoshan 678000,China)

机构地区：[1]云南省地质矿产勘查院保山地质矿产所,云南保山678000 [2]云南环复地质矿业有限公司保山分公司,云南保山678000

出　　处：《中国稀土学报》2020年第6期832-839,共8页Journal of the Chinese Society of Rare Earths

基　　金：云南省地质勘查基金管理中心招标项目(D201705)资助。

摘　　要：茅草园地区稀土矿属风化壳离子吸附型稀土矿床,其稀土矿产于燕山期高黎贡山岩浆杂岩带的花岗岩风化壳中,并有稀土元素异常、成矿地质条件与之相对应。矿体主要赋存于风化壳的全风化粘土层和强风化花岗岩层中,其形态、产状受地形地貌控制。矿体主要呈面状分布,厚度随地形的变化而发生变化。矿石的矿物成分以表生粘土类矿物为主,稀土元素以离子状态吸附于粘土矿物中。稀土矿石样浸取率在全风化粘土层和强风化花岗岩层中最高。通过对矿床成因及成矿条件的初步研究得出了,花岗岩风化壳离子吸附型稀土矿的形成是受内生地质条件和表生地质条件双重控制,其成矿机制表现为有利的成矿母岩与风化壳很发育的地区及有利的气候、地形、地貌、构造条件相结合,促使母岩矿物中的稀土元素大量转变为风化壳中呈吸附状态的稀土离子,从而富集成矿。The rare earth ore in Maocaoyuan area belongs to the ion adsorption type rare earth deposit of weathered crust.Its rare earth minerals are found in the weathering crust of granite in the magmatic complex of Gaoligong Mountain during Yanshanian period.The ore body mainly occurs in the fully weathered clay layer and the strongly weathered granite layer of the weathered shell,and its scale,shape and occurrence are controlled by the parent rock,climate,topography and geomorphology,and the degree of development of the weathered shell.The ore sample leaching rate is the highest in fully weathered clay layer and strongly weathered granite layer,and the upward or downward leaching rate decreases.The main occurrence state of rare earth elements is clay adsorption ion phase.In addition,the characteristics of weathering crust and the genesis and metallogenic conditions of the deposit are studied in shallow depth.It is found that there is a good prospect for finding weathered crust ion-adsorbed rare earth deposits in the south and east of Gaoligongshan magmatic complex.

关 键 词：高黎贡山岩浆杂岩带 离子吸附型稀土矿 地质特征 风化壳特征 成矿条件 

分 类 号：P618.7[天文地球—矿床学]