High-Density Electrical Method Combined with Geothermal Gradient Study on the Geothermal Resources of Yangyu Geothermal Field
The geothermal resource potential of Nan'ao Island is considered promising in the development prospects and tourism resources,Based on surveys of the surrounding surface and historical research data on the Changle—Nan'ao Fault,supported by the presence of several low-temperature hot springs(29 ℃)in Yangyu Village on Nan'ao Island,a popular tourist destination except for the cold days,this paper proposes that a secondary conductive hidden fault of the Nan'ao Fault exists in the study area,indicating that a deep-seated heat source,influenced by the activity of the Quaternary fault,this area exhibits good water con-ductivity.A high-density electrical method is employed to investigate the spatial distribution of hidden faults in Yangyu Village.Combining this with geothermal gradient data obtained from temperature measurement wells,the source of geothermal flow is successfully delinea-ted to identify favorable target areas.The research results,validated by drilling data show that the water temperature reaches 41.1 ℃ at a depth of 800 m and the pumping rate reaches 314 m3/d.This validation demonstrates the effectiveness of high-density electrical methods in intrusive rock regions,providing preliminary insights into the structural distribution,heat source,and water source of the Yangyu geothermal field.It also offers reference experience for the research of geothermal resources in intrusive rock regions.
万方数据
维普
