甘肃省白银市双硐峡石灰岩矿矿床地质特征及经济开发意义

Geological characteristics and economic development significance of Shuangtongxia limestone deposit in Baiyin City,Gansu Province

甘肃省白银市双硐峡石灰岩矿矿区出露地层主要为中寒武统第四岩组,含矿岩性为中-上层中细粒大理岩,岩层受矿区构造控制,走向稳定。矿石化学成分稳定,质量分数如下:CaO为53.20%,MgO为0.71%,SiO_(2)为0.68%,Fe_(2)O_(3)为0.30%,Al_(2)O_(3)为0.77%,K_(2)O为0.042%,Na_(2)O为0.024%,SO_(3)为0.079%,灼烧量44.195%。矿山开发近5年来,年平均利润为194 825元,具有较好的经济、社会和环境效益,很好地促进了当地经济和社会的发展。

The outcrop layer of the Shuangtongxia limestone deposit in Baiyin City,Gansu Province,is mainly the fourth rock group of Middle Cambrian,and the ore-bearing lithology is middle-upper medium fine marble.The rock layer is controlled by the structure of the mining area and has a stable strike.The chemical composition of the ore is stable with 53.20%CaO,0.71%MgO,0.68%SiO_(2),0.30%Fe_(2)O_(3),0.77%Al_(2)O_(3),0.042% K_(2)O,0.024%Na_(2)O and 0.079%SO_(3),with a burning amount of 44.195%.The average profit of the mine in the past five years is 194,825 yuan,which shows good economic,social and environmental benefits and plays a good role in promoting the development of local economy and society.