阿尔泰地区花岗伟晶岩稀有金属成矿机理及找矿标志浅析

Analysis of Prospecting and Metallogenisis of Rare Metal in Granitic Pegmatite from Altai

我国阿尔泰伟晶岩区发育十万余条伟晶岩脉，蕴藏工业白云母、陶瓷长石、稀有金属和宝石等丰富的矿产资源，也是世界著名的稀有金属伟晶岩产区。通过对阿尔泰伟晶岩时、空分布特征的分析研究，从形态产状、伟晶岩分类、分带性、矿物及地球化学特征、母岩浆性质、挥发份特征、伟晶岩成因及成矿机制等方面初步论述了阿尔泰地区花岗伟晶岩型稀有金属成矿机理。总结了阿尔泰山伟晶岩稀有金属矿找矿标志，如遥感影像、化探异常、结构分带、矿物标型特征及蚀变晕（流体作用）等。

The Chinese Altai orogenic belt, as the famous and important rare-element producing area in the world, hosts more than100 000 pegmatites and muscovite, ceramic feldspar, rare-element and gem resources.Based on the spatial and temporal characteristics of pegmatites located in the Chinese Altai orogenic belt, the pegmatitic rare-element metal- logenic mechanism for this region is preliminarily discussed in this paper from aspects of shapes and occurrences, miner- alization types, zonation patterns, chemical features of minerals, parental magma and fluxes ofpegmatites.Also, the pros- pecting criteria of the rare-elemental pegmatites are summarized, such as remote sensing, geochemical anomalies, zona- tion patterns, mineral characteristics and alteration halos.