THE DISCOVERY OF ADULAR AND ITS GEOLOGICAL SIGNIFICANCE IN GULIKU GOLD(SILVER) DEPOSIT

Adular is commonly distributed in Guliku gold(silver) deposit and can be divided into two kinds according to its occurrence. One is that adular and quartz occur in vein-like orebody of main mineralizing stage and altered wallrock closed to orebody with subveined or band-disseminated shape,the other is that adular occurs in altered andsite and dacite with disseminated or disseminated-network shape. This adular is the products of altered feldspar minerals in early stage of mineralization. Adular is rhombus,transparent biaxial crystal and negative character It is consisted of SiO₂(66.05%),Al₂O₃(17.53%),K₂O(16.04%) and Na₂O(0.25%) by microprobe analysis The discovery of adular has important significance in ore prospecting and metallogenic studying.