Geological Characteristics and Processing Properties of Graystone Deposits for Finishing in Anlong County, Guizhou Province

本研究以贵州安龙县饰面用灰岩矿床为研究对象，通过系统的野外地质调查、室内测试分析及工艺试验，揭示了该矿床的地质特征及其与加工性能之间的内在联系。研究结果表明，矿体赋存于三叠系中统垄头组地层中，呈层状产出，沿NE-SW方向延伸约1200米，出露宽度达130米，并可划分为4个岩性段。矿石自然类型包括泥晶灰岩、鲕粒灰岩等，主要矿物成分为方解石(CaCO3含量超过90%)，具有泥晶、鲕粒、生物碎屑等结构和块状构造。物理性能测试显示，豆粒灰系列表现最优(密度为2.85 g/cm3，吸水率为0.49%)，而木纹系列则表现出最佳的耐磨性能(15.5 l/cm3)。放射性检测结果显示，各项指标均符合GB 6566-2010 A类标准(IRa ≤ 0.1)。基于上述研究结果，本研究较为创新性地提出了“地质特征–材料性能–加工工艺”协同优化探讨，为区域石材资源的合理开发提供参考。This study focuses on the dimension stone limestone deposit in Anlong County, Guizhou Province, China. Through systematic field geological investigations, laboratory analyses, and processing tests, the geological characteristics of the deposit and their intrinsic relationship with processing properties were elucidated. The results indicate that the orebody occurs in the Middle Triassic Longtou Formation, exhibiting a stratified morphology extending approximately 1200 meters along the NE-SW direction with an outcrop width of 130 meters. The deposit can be divided into four lithologic sections. The natural types of ore include micritic limestone, oolitic limestone, and others, with calcite (CaCO3 content > 90%) as the dominant mineral component, displaying micritic, oolitic, and bioclastic textures as well as massive structures. Physical property tests revealed that the “Doulihui” series performed optimally (density: 2.85 g/cm3; water absorption: 0.49%), while the “Muwen” series exhibited the best wear resistance (15.5 l/cm3). Radiological testing confirmed that all indicators comply with the Class A standards of GB 6566-2010 (IRa ≤ 0.1). Based on these findings, this study innovatively proposes a synergistic optimization framework integrating “geological characteristics - material properties - processing techniques,” providing a scientific basis for the rational development of regional stone resources.