Geological characteristics and preliminary resource evaluation of granite ore for decoration in Songka area Xizang
The Songka mining area is located in the magmatic arc of Gangdise Xiachayu volcano,and the magmatic activity is relatively frequent,resulting in the development of a large number of rock masses in the mining area.The host rocks of the granite ore for decoration in the mining area are the Late Cretaceous Middle-fine-grained biotite monzogranite.Through systematic investigation,a total of 7 ore bodies were delineated in the mining area.The ex-posed width of the ore bodies was between 50～500m,with undeveloped color spots and lines,and generally undevel-oped joints.The background color is grayish-white.The color is uniform and stable,and it is relatively clear.The ore appears to be collageable and it is a medium to low grade indoor and outdoor decoration stone.Through the statisti-cal analysis of joint fissures,the distribution characteristics and dominant directions of joints in the ore body were pre-liminarily clarified.The dominant direction of joint tendency with great influence on the ore body is 295°,which is in the range of 290°～300°.The dominant direction of the joint is 30°,in the range of 20°～40°.The rate of stone-block calculated by the two surface joint sketch points(SKMJL1 and SKMJL2)in the mining area are η1=51.10%and η2 =44.59%,respectively,and the average block rate is 48.43%,which has good economic potential.
Songka mining areaGranite ore for decorative purposesGeological characteristics of the ore bodyPre-liminary resource evaluation
万方数据
维普
