滇西腾冲-梁河地区土官寨离子吸附型稀土矿床形成条件及找矿预测
Formation Conditions and Prospecting Prediction of Tuguanzhai Ion-Adsorption Type REE Deposit in Tengchong-Lianghe Area

滇西腾冲-梁河地区是近年来寻找离子吸附型稀土矿床的热点地区，但关于该类型矿床在滇西高海拔地区的控矿因素、形成条件等研究接近空白.通过分析土官寨稀土矿床的风化壳结构、矿体垂向-走向变化特征，总结了区域成矿地质条件和找矿标志.滇西腾冲-梁河地区与花岗岩有关的离子吸附型稀土矿主要受控于母岩稀土元素丰度和地形，“高山丘陵区”和“盆-山过渡带”内的“低山丘陵区”是有利成矿地形区.基于上述认识，对江东地区开展了小范围找矿预测，取得了良好的找矿效果.
Tengchong-Lianghe area in western Yunnan is becoming a hot area for ion-adsorption type REE deposit prospecting.However,there is few study on the ore-controlling factors and formation conditions of this type of deposit in high altitude areas in western Yunnan.In this paper,we have analyzed the composition of weathering crust and the variation of orebody in vertical-strike of Tuguanzhai deposit.We consider that the ion-adsorption type REE deposit is controlled by REE of parent rock and topography.The mountainous and hilly regions and low mountains and hills are favorable mineralization regions.8 favorable areas which have satisfactory ore-prospecting results have been found in Jiangdong area,indicating the effectiveness of the prospecting method