A Study Of Characteristics And Formation Of The Xiaguan Hot Spring And The Anning Hot Spring In Yunan

Xiguan Hot Spring is outcropped by the fault of the third low grade Tangzipu in "æ­¹" tectonic system Honghe fault, the unique genetic model accomplishes it distinctive temperature, water chemical and isotope characteristics. Anning Spring is upward spring group, the author chooses five outcrop of the water samples in study. Though the comparative analysis, the author puts the emphasis on discussing the water chemical, isotope, formation model of both hot spring and the relationship between the formation model and the prediction of the seismic of Xiaguan hot spring and evaluate the heat resource of storage of Anning hot spring.The author uses the AquaChem software to analyze the five water samples of Xiaguan hot spring and the characters of the main chemical components of Anning hot spring. The result shows that the difference of the chemical characters of the Xiaguan hot spring and the rest of four water samples are significantly, however the chemical characters of the Anning hot spring are similar. Though analyze of the TDS of the Anning hot spring, author found that the main ions that controlled the salinity are Ca²⁺, Mg²⁺ and HCO₃^-. Also, further study is carried out on the concentration distribution of SiO₂ in anomaly area.Using the different effect of H, O isotope analyzing, the main recharge resource is determined as precipitation, the recharge elevations are the 3855 m and 2950 m, the main temperature are 1.78℃and 2℃, the average age of the hot spring is above 40 a. Though the analyzing of the quantity of Radom, author concludes that the abnormal quantity of Radom is low value abnormal, which is caused by the mixture of the low value of Radom in the river to the hot water before it runs out of surface and also it may be the reason that the multi-recharge source recharge of the Xiguan hot springs could reflect the multi-orientation seismic.Using the geochemistry temperature scale, the author evaluates the deep-seated reservoir temperature of these two hot springs, also discuses the ratio of cold water mixture and temperature that these two springs are subjected. The reservoir temperature of Xiguan hot spring is calculated as 114℃, the ratio of cold water is 55% and the temperature of pre-mixing hot water is 153℃when the hot water mixture is taken into consideration, however, the pre-mixing hot water temperature is 121℃and the ratio mixture of cold water is 72% in Anning hot spring, when the cold water mixture is taken into consideration.During the geothermal reserve method, the calculation thermal storage resource in Anning is about 9.0949×10¹⁵ J, which equals to the 3.1073×10¹⁵t of the standard coal. And finally, the suggestions are made according to the situation for utilization of these two hot springs. The exploitation quantity of the holiday village is designed due to the capacity of outlet water of Xiguan hot spring, which not only could make the holiday village as the scenic spots of leisure tourism, but also could serve as the studying site for the local prediction of seismic and fault activities. It is important to arrange the quantity and location of hot water pumping wells reasonable and design the quantity of pumping rate to make sure the hot spring could be use long sustaining and scientifically. The author suggests the next step should be pumping form the third geothermal reservoir layer and the pumping should be set at Tianxiadiyitang.