漳州岩体放射性生热率特征及干热岩资源潜力

Study of the Characteristics of Radioactive Heat Production Rate and Hot Dry Rock Resources Potential in Zhangzhou City

分析了漳州岩体地表钻孔岩石样品的密度以及铀、钍、钾含量,并进行了放射性生热率计算及生热率特征分析。在此基础上,对漳州岩体放射性生热率进行比较、干热岩地热地质特征分析和干热岩资源量估算,结果表明:漳州岩体具有较高的放射性生热率、良好的干热岩地热地质背景、较大的干热岩资源储量,总热能为3.244×1021J,折合标准煤约110.71亿t,提取2%折合2.21亿t标准煤,提取20%折合22.14亿t标准煤,提取40%折合44.28亿t标准煤,且主要以高温形式存在,占总资源量的91.37%,干热岩资源潜力较大。上述研究成果可为福建地区干热岩资源勘查评价及开发利用提供依据。

The contents of U,Th,K of the rock samples collected in Zhangzhou city are tested and analyzed,besides that,the radioactive heat production rate is computed and the radioactive heat production rate characteristics is discussed. Based on the above analysis results,the radioactive heat production rate of the rock samples is conducted contrastive analysis,the geological characteristics of the hot dry rock resources is analyzed and the hot dry rock resources is estimated. The results show that the rock mass in Zhangzhou city with high radioactive heat production rate,good geothermal geological background and large reserves of hot dry rock resources,the total heat energy of the hot dry rock resources in Zhangzhou city is 3. 244 × 1021 J,which is equivalent to the heat energy provided by 11. 071 billion ton standard coal,the 2% of the total heat energy of the hot dry rock resources in Zhanghzou city is equivalent to the heat energy provided by 221 million ton standard coal,the 20% of the total heat energy of the hot dry rock resources in Zhanghzou city is equivalent to the heat energy provided by 2. 214 billion ton standard coal,the 40% of the total heat energy of the hot dry rock resources in Zhanghzou city is equivalent to the heat energy provided by 4. 428 billion ton standard coal,the heat energy of the hot dry rock resources in Zhangzhou city is existed mainly in the form of high temperature,which is the 91. 37% of the total resources reserves,the hot dry rock resources potential of the area is large. The above research result can provide reference for the exploration,evaluation,development and utilization of the hot dry rock resources in this area.