Characteristics and development prospects of basalt in Ebian County,Sichuan Province
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摘要: 四川省峨边县玄武岩矿资源丰富,但尚无开发利用纤维用玄武岩的矿山。从玄武岩的矿石组构、化学成分和玄武岩拉丝性能判别指标3个方面开展纤维用玄武岩评价工作。研究结果显示: 研究区致密块状玄武岩和杏仁状玄武岩多属拉斑系列与碱性系列的过渡型岩石,玻基玄武岩均为碱性系列; 拉斑玄武岩系列矿石的化学成分具有SiO2含量较高、(K2O+Na2O)和TiO2含量较低、FeO/MgO值较大的特征; 区内致密块状玄武岩适合连续玄武岩纤维生产,而杏仁状玄武岩的杏仁中含有石英和方解石等次矿物,玻基玄武岩具有火山玻璃成分含量高、杏仁状构造及酸度系数过高等特征,均不宜作为生产玄武岩纤维的原料。研究区玄武岩矿具备纤维用玄武岩资源储备地的潜力,建议采用综合开发的方式利用玄武岩矿资源。Abstract: Ebian county is rich in basalt mineral resources, but there is no mine to exploit and utilize fiber basalt. The evaluation of fiber basalt is carried out from three aspects: ore texture, chemical composition and evaluation parameters of basalt wire drawing performance. The results show that the dense massive basalts and almond-basalts mostly belong to the transitional rocks between tholeiitic series and alkaline series, while the vitrobasalt are all alkaline series in the study area. The chemical composition of tholeiitic series ores is characterized by high SiO2 content, low alkali metal oxides (K2O+Na2O) and TiO2 content, and high FeO/MgO ratio. The dense massive basalt is suitable for continuous basalt fiber production in the area. Due to the secondary minerals such as quartz and calcite contained in the almond of almond-basalt and high volcanic glass composition, almond structure and high acidity coefficient in vitrobasalt, they are all unfavorable to be used as raw material to produce basalt fiber. The basalt mineral resources are huge in the study area, with the potential for the fiber-applied basalts resource reserves, and it is recommended to utilizing the basalt mineral resources by comprehensive development.
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