Geothermal Conditions And Potential In Muqi Of Eastern Fushun

In the 21 st century, fossil energy is still the major energy utilized and consumed by human beings. However, damages to ecological environment have been increasingly aggravated with the substantial consumption of fossil energy. Thus, people have paid more and more attention to exploration, development and utilization of clean energy. As clean energy, geothermal resources have become more and more popular.There are relatively favorable geothermal geological conditions in Muqi in the east of Fushun. According to characteristics, regional geological structures, geological backgrounds, strata, rocks and geothermal fields, reserves of geothermal resources, quality of geothermal fluids, exploitation and development conditions of Muqi are generally clarified by geothermal geological survey, geophysical exploration, geothermal drilling, pumping test and evaluation on quality of geothermal fluids and so on in this paper.In combination with geophysical exploration, nine faults are explained altogether, including 7 and 2 faults extending from the north to the west and from the north to the east respectively. Distributing along Fangshengou, Dabao, Dabao of Henan Province and Gezidong, the fault extending from the north to the west between Fangshengou to Gezidong(F1) strikes at 152°and inclines at 62°(between 70°and 80°) with a length of about 7.1km. The fault extending between Maerdun and Erlinzi from the north to the east(F2) through Dabao of Henan Province and Dabao strikes at 29°and inclines at 299°(between 70°and 80°) with a length of approximately 5.7km. F1 and F2 are major faults within the research area.The thermal reservoir belongs to a moderately weathered zone on granitic gneiss, where rocks are fragmented, joint fissures are developed and water yield properties are favorable. Impacted and controlled by regional crustal faults and several transtensional faults extending from the north to the west and east, banded fault zones composed of several faults on the thermal reservoir are interconnected to form a water-included network and banded thermal reservoir.The cover of the thermal reservoir is made up of siltstones of Mesozoic Jurassic Xiaodonggou Formation(J3x), tuff mixed with tuffaceous siltstones, shales and sand-included siltstones of the Cretaceous Lishugou Formation(K1l) as well as andesites of Xiaoling Formation(K1xl). Erupted from a series of volcanoes in inland limnetic facies and formed with terrigenous sediments, they are 500 to 1,300 m thick, cover Archean granitic gneiss, have moderate thermal conductivity and can make up the cover of thermal reservoir.Thermal energy storage method and coefficient of mining recovery rate were used for calculating geothermal reserves of thermal energy storage. The geothermal water storage was calculated by storage method. In the thermal reservoir, a total amount of 6.22×1016J energy and 6.22×1015J recoverable energy(equivalent to 2.12×105t standard coal) were stored in the thermal reservoir. 3.28×107 m3 geothermal water was stored.Concerning the chemical type, the geothermal fluid was SO4- Na·Ca-type water, where the content of strontium and fluorine reached the concentration of named mineral water. Meanwhile, the content of manganese was up to the concentration of a mineral water and could be used for physiotherapy.