车田湾地热田地质地球物理特征及开发前景

GEOLOGICAL AND GEOPHYSICAL CHARACTERS AND DEVELOPING PROSPECTS OF THE CHETIANWAN GEOTHERMAL FIELD

车田湾地热田属低温地热资源。热泉分布受ＳＮ向压扭性深大断裂（Ｆ２）与近ＥＷ向张性断裂的复合控制，其断层破碎带为硅化脉充填，表现为高阻地电特征。应用电测深法可以确定其断层破碎带产出位置和延伸方向。用钾镁地热温标计算热田地表温度，用钾钠地热温标计算热田深部温度。根据温度随深度而递增的规律，应用温度－深度曲线方法推算地下某深度的水温，从而可合理开发利用地热资源。

The Chetianwan thermal field is a low temperature geothermal resource area.Distribution of the hot spring is controlled by the cross location of the SN compresso shear deep seated fault(F 2) and near EW tension fault.The fracture zone has been filled by siliciation veins and charactered by high resistivity of ground electromagnitism.The occurring location and extension direction of the fracture zone can be determined by using electrical sounding.The surface temprature is calculated by geothermometer scale of K and Mg.The deep temperature of the thermal field can be calculated by geothermometer scale of K and Na. Based upon the regularity of progressive increase of temperature with depth,the method of temperature depth curve has been used to calculate the water temperature at a certain depth,which therefore can make a reasonable development and utilization for the geothemal resources.