鄂西盐池河温泉成因及其对水布垭水利工程地壳稳定性的影响

盐池河温泉是清江流域内唯一的温泉，出露于奥陶系红花园组灰岩地层中，受控于龙王冲断裂派生出的ＮＮＥ、ＮＷ向次级小断层。地质分析及有关测试成果表明，该温泉水源主要来自大气降水和清江河水沿断裂的下渗，经地热增温并吸收龙王冲断裂稳滑运动所产生的摩擦热量后，再沿ＮＮＥ、ＮＷ向断裂交汇部位溢出地表，是一个地层一断层复合控制型温泉。该温泉的出露，有利于水布垭水利工程区域地壳稳定性，可以减少水库诱发地震的机会。

CAUSE OF YANCHIHE HOT SPRING IN THE WEST HUBEI AND ITS INFLUENCE ON CRUSTAL STABILITY OF THE SHUIBUYA WATER CONTROL PROJECT

The Yanchihe hot spring is only one in the Qingjiang reach. It outcrops in the limestone of Honghuayuan Group of ordovician system, and controlled by the faults in trend of NNE and NW derived from Longwangchong fault. The geological analysis and the results of relative test indicate that the water source of the hot spring derive from the rainfall and Qingjiang water permeating along fault zones,and it flows up over the surface of the earth along the intersection of faults in trending of NNE and NW after being heated by geotherm and absorbing a part of the frictional thermalism from stable-slip motion of Longwangchong fault.The hot spring is one of the type controlled by stratigraphic-fault.It is favourable in the regional stability of crust , and can abate the chance of earthquake in the reservoir.