甘肃省东乡县黑石山建筑用石料矿矿石特征

Ore Characteristics of Heishishan Building Stone Mine in Dongxiang County,Gansu Province

东乡县黑石山建筑用石料矿大地构造位置地处秦祁昆造山系,中祁连弧盆系的中祁连岩浆弧之临夏陇西盆地。普查区共圈出矿体1条,矿体为晚志留世中细粒黑云母花岗闪长岩及灰绿色黑云母石英闪长岩,呈岩株状展布于普查区中,在与围岩接触处有混染同化现象。通过估算,普查区范围2196~1850 m标高区间内建筑用石料矿资源量11450.56×10^(4) m^(3)。剥采比0.02∶1。该矿区矿石主要以建筑用石料为主,根据样品分析结果,达到工业Ⅰ级品以上,为较好的建筑用石料。

The tectonic location of Heishishan building stone mine in Dongxiang County is located in Longxi basin,Linxia,which is the middle Qilian magmatic arc of middle Qilian arc basin system.A total of 1 ore body has been delineated in the survey area.The ore body is late Silurian medium fine grained biotite granodiorite and gray green biotite quartz diorite,which are distributed in the survey area in the form of rock trees,and there is the phenomenon of contamination and assimilation at the contact with surrounding rock.According to the estimation,the mineral resources of building stone within the elevation range of 2196~1850 m are 11450.56×10^(4) m^(3).The stripping ratio is 0.02∶1.According to the results of sample analysis,the ore in this mining area is mainly building stone,which is better than industrial grade I.