广西岑溪市三堡镇雅煜矿区优质饰面用花岗岩矿床地质特征

Geological characteristics of high-quality granite deposit for decorative usage in Yayu mining area,Sanbao Town in Cenxi City of Guangxi

三堡镇雅煜优质饰面用花岗岩矿位于享有“中国花岗岩之都”的岑溪市。本文主要对该区饰面用花岗岩的矿体特征、矿石质量特征和矿体节理、裂隙发育程度等方面进行总结,探讨影响节理、裂隙发育的原因及荒料率的影响因素。分析认为,该矿床为大型规模花岗岩矿床,矿体赋存于晚侏罗世一期(ξγJ_(3)^(1))花岗岩体中。其估算控制的资源量6220.1万m^(3),荒料量1331.7万m^(3);推断的资源量3596.8万m^(3),荒料量770.1万m^(3)。矿石结构简单,矿石的物理性能均满足饰面石材一般工业指标要求。矿体荒料率平均为21.41%,并与矿体的节理、裂隙发育程度成反比。矿体的主要节理、裂隙的发育程度随着岩体深度的增加而减弱。

The high-quality decorative usage Yayu granite deposit in Sanbao Town is located in Cenxi City,which is famous for the'capital of granite in China'.This paper mainly summarizes the ore body characteristics,ore quality characteristics,ore body joints and fracture development degree of decorative usage granite in this area,and discusses the causes of joint and fracture development and the influencing factors of barren rate.It is showed that the deposit is a large-scale granite deposit,and the ore body is hosted in the granite body of the first stage of Late Jurassic(ξγJ_(3)^(1)).The estimated amount of resources is controlled for 62.201 million m^(3),and the amount of barren is 13.317 million m^(3).The inferred resource amount is 35.968 million m 3,and the inferred amount of barren is 7.701 million m^(3).The ore structure is simple,and the physical properties of the ore meet the general industrial index requirement of decorative stone.The average barren rate of ore body is 21.41%,which is inversely proportional to the development degree of joints and fissures of ore body.The development degree of main joints and fissures of ore body decreases with the increase of rock mass depth.