Characteristics And Genesis Of Yichongqiao In Hunan Province

The Yichong Bridge geothermal field is located 19-25km southwest of cili county,changde city,hunan province.It is located in the south of huayuan-yongshun-sangzhi fault,which is the main thermal control fault in northwest hunan.The fracture development and good geothermal geological conditions,hydrothermal activities,rich geothermal resources.In the study area of 16km~2,five hot springs were found in the area,with the temperature between 39 and 53 degrees.This article relies on the mineral right price geological exploration project named”Feasibility exploration of The Yichong Bridge geothermal resources in cili county,hunan province”in hunan province.By means of data collection and analysis,field work of geothermal exploration,geophysical exploration,geothermal well drilling,pumping test,dynamic monitoring of underground hot water,mathematical calculation,etc.,the genetic mechanism and characteristics of the geothermal water resources of appropriate chongqiao are studied.Achievements such as:Firstly,geothermal geological conditions,boundary of geothermal fields,hydrogeological conditions,thermal storage temperature and structural conditions in the study area were determined.The study was divided into four blocks,namely yumidu west block,yumidu east block to renshiqiao block,renshiqiao block and shataowan block,with a total area of 16km2.Secondly,according to drilling temperature measurement,geophysical exploration results,water quality analysis results and underground hot water dynamic monitoring results,the geothermal fluid dynamic characteristics of the geothermal field,geophysics,geochemistry and geothermal fluid in the research area were obtained,and the total amount of underground hot water and thermal energy resources were calculated according to relevant specifications.The maximum temperature of hot water in deep geothermal field is estimated by quartz geothermal temperature scale without steam loss.The hot water circulation depth of yu midu west block,yu midu east block,ren shiqiao block and sha dao wan block calculated by SiO2 temperature scale method is 950 to 2200 meters,and the heat storage temperature is between 50 and 77 degrees.It is found that the regional Lishui large fracture is the thermal control structure of the yichongqiao geothermal field.Its maximum value is to create the yichongqiao geothermal field.The secondary structure and the structural fracture zone generated by the great destructive power of regional structure become the storage space of underground hot water and the deep circulation of cold water as well as the upwelling channel after heating.The Lishui river fracture is a thermal conductivity structure of geothermal fields.The deep Lishui river fault is connected with the Lishui river fault and becomes the main channel for the upwelling of deep hot water.The associated secondary structure and fracture belt form the storage space of thermal storage.Lishui river fracture and Lishui river fracture between far-flung ends at nanjinguan group contains rich fissure karst water,part of the Lishui river discharge,part with large area flood irrigation along the crack down in the form of infiltration or migration down the fault fracture zone,heating by deep tectonic frictional heat energy stores,fracture guided by Lishui river,in Lishui river flow,formation of beads hot QuanQun and form geothermal anomaly area along the river and the north.