四川省道孚县容须卡地区红柱石矿地质特征及综合利用

红柱石作为高级耐火材料和提取硅铝合金的主要矿物,适用于冶金、建材、陶瓷、航空等多种行业.国内对红柱石的需求将随着社会经济发展日益增长.四川省容须卡构造岩浆热穹隆位于松潘—甘孜造山带东部,区域内广泛出露以三叠系西康群为主的被动陆缘复理石地层,构造岩浆热穹隆核部及四周为印支—燕山期花岗闪长岩和伟晶岩脉,热接触变质带中主要有红柱石二云母片岩、红柱石十字石云母片岩、含十字石红柱石二云母石英片岩和二云母片岩等岩石类型.片岩中富含红柱石、十字石等矿产,伟晶岩脉富含锂、铍等稀有矿产.四川道孚县容须卡地区红柱石中Al2 O3含量为61.44%、SiO2含量为37.11%、(K2 O+Na2 O)含量为0.18%、FeO含量为0.15%,可满足高级耐火材料、技术陶瓷和硅铝合金原料的工业要求.经过地质调查和资源潜力评价,远景预测资源量为2.3亿t,规模可达大型以上.四川康定—雅江—道孚红柱石资源蕴藏量大,随着国家建设重点向西部地区转移,资源综合利用优势明显,开发前景良好,有望成为我国最大的红柱石矿床或世界级大矿.通过进一步开展工作,开发后可缓解我国红柱石部分需要依靠进口的局势.

Geological Characteristics and resources comprehensive utilization of andalusite mine in Rongxuka area,Daofu County,Sichuan Province

As advanced refractory and main mineral for extracting silicon aluminum alloy, the andalusite can be used in industry of metallurgy, building materials, ceramics, aviation and so on. The demand for andalusite will keep increasing along with the development of social economy. Rongxuka tectonic-magmatic dome is situated in the east of Songpan-Ganzi Orogenic Belt in Sichuan Province, and the flysch strata of the passive continental margin dominated by Triassic Xikang Group are widely distributed in the area. The core and periphery of the tectonic-magmatic dome are intruded by Indo-China period granodiorite and pegmatite veins. The contact metamorphic zone is mainly andalusite two-mica schist, andalusite-staurolite-mica schist, staurolite-andalusite-contained two-mica schist, two-mica schist and so on. There are non-metal deposits such as andalusite, staurolite in the schist, and rare-metal deposits such as lithium and beryllium in the pegmatite veins. The Al₂O₃ and SiO₂ contents of the andalusite of Rongxuka area are 61.44% and 37.11%, and the (K₂O + Na₂O) and FeO are 0.18% and 0.15% respectively, which can meet the industrial requirement of advanced refractory, technological ceramic and silicon-aluminum alloy raw materials. By investigation on the spot, the authors identified the prospective andalusite resource of the area is 2.3 tons, above the standard of large scale. There is a considerable amount of andalusite resource in Kangding-Yajiang-Daofu belt of Sichuan Province. With the transference of the national construction focus toward western areas, there are remarkable advantages of the comprehensive utilization and favorable development prospect of andalusite deposit, which might hopefully become the biggest or world-class andalusite deposit in China. It may alleviate the condition that part of the minerals relies on importation.