| As the global fossil energy decreases day by day,the situation of ecological environment protection has become increasingly serious and the demand for energy in the world is still surprisingly high.The depravation of the energy crisis makes it that the demand for renewable energy in all countries of the world is growing.Geothermal resources as an important renewable clean energy,its social,economic and environmental benefits are significant.There are huge reserves of geothermal resources in China,and medium-low temperature geothermal resources are most,almost all over the country,and the condition of the development and utilization is better.As early as in the 1970 s,our country realized the importance of geothermal resources.Through large-scale exploration and development stage,but compared with other renewable energy,both the theory and technology have not been mature,and our country still faces the following questions:(1)The basic scientific research of the causes of geothermal resources and existing environment remains to be further strengthened.While we explore hot spring resources,we collect and accumulate all aspects of geophysical and geochemical information related to hot springs,such as geothermal field,element distribution and etc.It not only helps to perfect the related basic theory,but also has guiding significance in the future exploration of the underground hot water.(2)The research of the method and technology for geothermal resource exploration needs to be deepened.On the one hand,sometimes a single prospecting method has multiplicity of solution,and it can't meet the needs of the deep geothermal hot springs and concealed exploration.On the other hand,from the perspective of geology and mineral resources exploration,every kind of exploration method has its limitation.Different geothermal field,and its regional geological conditions,geothermal structure,geothermal genesis and geothermal water chemical types are different,and the law that its geophysical and geochemical anomalies reveal must be different,and we cannot copy a certain pattern.For this,the combination of many reasonable methods has an obvious effect on mutual complementation,mutual verification and improving the exploration precision.Multiple instances prove that the integrated application of geochemical exploration methods in the geothermal resource exploration has good results.(3)In the actual geothermal resource exploration,some conventional physic-chemical methods are difficult to carry out restricted by terrain or environmental conditions.For this,the introduction of new and unconventional exploration technology can help to achieve good results.(4)There is a great need in developing the exploration technology for deep geothermal resource.The technology is difficult in deep geothermal resource exploration,and it mainly displays in the difficulty of establishing geophysical field in deep exploration area,the disadvantages of observation and research because geophysical field established in detection area intensity is small and the interference of signals and so on.For this,introducing some advanced exploration technologies and establishing deep detection technology combination and comprehensive interpretation technology platform have an advantage in obtaining deep information can provide auxiliary for positioning drilling and reduce the risk.In view of the above problems,this article plans to carry out geo-gas sampling and measurement on many hot springs whose tectonic control is explored,accumulating the aura information related to the concealed springs hot and study its regularity,exploring that using Rock forming elements concentration in the aura the anomaly amplitude and aura elements to indicate the feasibility of the concealed hot spring.On the basis,we established a set of new technologies that use geo-gas measurement to measure concealed hot springs or hot water fracture structure.The topic of the paper comes from the National Natural Science Fund Project "Study on the geogas field and exploration method of the concealed hot springs"(NO.41274131).Project was carried out for the first time to research the mechanism,method,technology and range of application of geo-gas survey concealed hot springs.We used hot spring water samples in Tangli,Cangshi and Chaqingka site Deda township,Batang county,Sichuan province and the water for comparison to build and complete geo-gas migration simulation experiment of 8 groups hot springs geo-gas model and had a comparison with the experimental results of the lead-zinc mine geo-gas model.We researched the detection technology of geo-gas weak information extraction in hot springs reservoir.There were three known deep cycle infiltration type hot springs chosen as the geo-gas information collection study area,including Tangli,Wuning county,Jiangxi province,Nuanshui village,Chongyang town,Shaoguan city,Guangdong province and Cangshi,Nanxiong city,Guangdong province.Through the large scale profile measuring,system collected geo-gas information over hot spring and its adjacent area.Based on experiment data of hot springs geo-gas migration model and geo-gas measurement data in known hot springs study area,combined with modern mathematical method,trace element tracing and partition model are applied to the study of geo-gas area,the system studied composition and distribution of elements in geo-gas above the hot springs water reservoir area,extracting effective indicator elements of hot springs in geo-gas area,exploring the spatial correlation law between hot spring water reservoir area and the elements.Preliminary building a set of geo-gas exploration techniques for sampling,analysis,data processing and interpretation for hot spring exploration,and selecting Chaqingka site Deda township,Batang county,Sichuan province to carry out studies of hot spring exploration application demonstration.Knowledge and achievements of the project:(1)The hot spring model geo-gas move simulation experiments show that the model,in the flow,there are many elements in hot springs from the behavior,and the migration activity is far greater than the use of concealed orebodies,providing guidance for using geo-gas field to indicate concealed hot springs.(2)Geo-gas indicator elements that can be used in the exploration of the hot spring: Cu,Pb,Zn,Ni,Co,Cd,Sc,Cr,Li,Y,etc.There are slightly differences in different areas' hot springs.(3)Use the serial trap and pre-concentrate geo-gas samples.Then use ICP-MS analysis of sample collection and the procedure analysis,it can detect the weak geo-gas information from hot spring,catching geo-gas anomalies of hot springs reliably.(4)The paper proposed the genetic model of hydrogeochemical method is established based on the characteristics of hot spring water,using the anomalous distribution of characteristic elements in air and gas,the concealed channel of hot spring is determined,and the exploration model of hot spring target is delineated by the characteristics of trace elements in ground gas survey.(5)The relationship model of hot springs geo-gas field and hot springs is applied to Chaqingka site Deda township,Batang county,Sichuan province,offering further working suggestions for the local hot spring exploration.The objective changed geo-gas detection technology from solid mineral exploration to a new application field successfully,offering a new thinking and new technical support for the detection of concealed hot spring. |
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