湘南石牛寨玻璃用脉石英矿(南矿段)地质特征及成因浅析

Geological Characteristics and Genesis Analysis of Shiniuzhai Glass Gangue Quartz Deposit(South Ore Section)in Southern Hunan

湘南石牛寨矿区位于彭公庙岩体中,控矿构造为炎陵一宜章断裂带(F47)的平行次级断裂,两侧围岩为加里东期黑云母二长花岗岩,具有较好的脉石英矿成矿条件。该矿区(南矿段)矿石质量好,SiO_(2)质量分数为95.76%~96.90%,平均质量分数为96.36%;Al_(2)O_(3)质量分数为1.79%~2.50%,平均质量分数为2.03%;Fe_(2)O_(3)质量分数为0.26%~0.29%,平均质量分数为0.27%;Cr_(2)O_(3),TiO_(2)等有害组分质量分数较低。矿石中的铁主要赋存于赤褐铁矿中,矿床类型属富硅热液充填型。

Shiniuzhai mining area is located in Penggongmiao rock mass.The ore controlling structure is the parallel secondary fault of Yanling-Yizhang fault zone(F47).The surrounding rocks are Caledonian biotite monzogranite on both sides,which has good metallogenic conditions of gangue quartz ore.The ore quality of the mining area(South section)is good.The mass fraction of SiO_(2)is 95.76%to 96.90%,average of 96.36%,the mass fraction of Al_(2)O_(3)is 1.79%to 2.50%,with the average content 2.03%,and the mass fraction of Fe_(2)O_(3)is 0.26%to 0.29%,with the average of 0.27%.The content of Cr_(2)O_(3),TiO_(2)and other harmful components is low,and the iron in the ore mainly occurs in hematite,which belongs to the silica-rich hydrothermal filling type.