湖南沩山岩体干热岩地质特征及资源潜力

Geological Characteristics and Resource Potential of Hot Dry Rock in the Weishan Pluton of Hunan Province

为深入查明湖南沩山岩体干热岩地质特征及资源潜力,本文通过利用野外地质调查、岩矿测试及生热率计算方法,对沩山岩体的区域地质和地热地质背景进行了研究。研究发现该区存在较大规模的花岗岩岩基,且岩体生热率及放射性热均较高,地表高热异常,具备干热岩赋存地质条件。在此基础上,利用体积法初步对该区2~6km岩体进行了资源估算,结果显示,湖南沩山岩体干热岩资源量为33.50×10^17kJ,折合1143.39亿吨标准煤。研究表明,沩山岩体具备良好的干热岩地热地质条件及资源潜力。

The purpose of this work is to clarify the geological characteristics and resource potential of the hot dry rock in the Weishan pluton of Hunan Province. By field geological investigations,rock and mineral tests and calculation of heat generation rates,we have studied the geologic and geothermal background of this pluton. The results show that there is a large-scale granite bedrock in this area,and the rock mass has high heat-generation rate,high radioactive heat,high thermal anomalies on the surface,indicating geological conditions for the presence of hot dry rock. On this basis,the volume method was used to estimate the hot dry rock resources of the 2~6km rock mass in this area. The results show that the resources of the Weishan pluton of Hunan Province are 33.50×10^17 kJ,equivalent to 114.339 billion tons of standard coal. It is considered that the Weishan area has good geologic conditions for hot dry rock and certain resource potential.