广东韶关构造复杂区温泉分布规律与控制因素

Study on the distribution and controlling factors of hot springs in the complex structural area in Shaoguan area,Guangdong,China

研究广东省韶关市温泉的出露特点与分布特征,为韶关市温泉的整体勘查和开发利用提供依据。通过对研究区内温泉点的出露位置、构造、热储岩性和水化学特征等进行分析,总结韶关市温泉的分布规律和影响因素。就构造而言,研究区温泉多分布在深大断裂带附近或其衍生的次级断裂上,且往往出露在两组断裂交汇部位;就岩性而言,有54处温泉出露于侵入岩区及其与围岩接触带附近,22处出露于碳酸盐岩区,仅有6处出露于碎屑岩区。研究区温泉的分布受热源、构造和岩性共同控制,深大断裂连通了深部热源,构造裂隙则为地热水提供了主要的运移和储存的空间。NE向深断裂和EW向构造岩浆岩带交汇区域的侵入岩中构造裂隙极为发育,是温泉的集中分布区,而泥盆系-石炭系向斜盆地内断裂发育的碳酸盐岩中,温泉往往沿褶皱轴向形成集中分布带。

The previous investigation of 82 hot springs occurred in Shaoguan City,Guangdong Province was limited to the number,location,water temperature and water quantity of hot springs,but there was no systematic summary of geothermal geological conditions and distribution of hot springs.It is necessary to study and analyze the distribution,hydrochemical characteristics,heat storage characteristics and the relationship between hot springs and structures in different lithologic areas in Shaoguan area.Through investigation and comprehensive research,this paper has summarized the distribution law of hot springs in Shaoguan area in order to provide basic data for the overall exploration,development and utilization of hot springs in Shaoguan area,and provide clues for the study of the control factors of hot springs distribution in the complex structural areas of South China.The results show that the hot springs in the study area mostly distribute near the deep and large fault zone and associate secondary faults,and often appear at the intersection of the two groups of faults.In terms of lithology,54 hot springs appear in the intrusive rock area and the surrounding rock contact zone,22 occur in the carbonate rock area,and only 6 are exposed in the clastic rock area.It reveals that the heat source,structure and lithology controlled the distribution of hot springs in the study area,while deep and large faults connected the deep heat source,and structural fractures provided the main space for the migration and storage of geothermal water.In the intersection area of NE-trending deep faults and EW-trending tectonic magmatic belts,the tectonic fractures are highly developed in the intrusive rocks,which is the concentrated distribution area of hot springs.In the syncline basin composed of Devonian-Carboniferous carbonate rocks,hot springs tend to distribute in zonal clusters along the fold axis.