关键词: 云南省, 活动断裂, 热动力变质带, 断层流体地球化学, 碳同位素地质温标

Abstract: The author has studied the distribution of gebthermal water, discharges of the fault gases, isotopic compositions of the hot springs in Western Yunnan earthquake prediction test site. The relationship between the geochemical characteristics of the main active faults with the types, intensity and depth of faulting was discussed. The author suggests that larger dynamo-metamorphic belt has developed at a depth of about 5.4-6.2 km in the northwest of Eryuan County, and it was the result of the intersection of NW-and NE-trending tectonic belts. The hot springs in the area closely relate to this metamorphic belt. They are typical shear-heating type springs, characterized by strive thermo-dynamic-metamorphism. The hot springs along the Red River fault are of deep cycle-heating type ones, containing many components from the mantle.

Key words: Yunnan Province- Active -fault, Thermo-dynamic metamorphic belt, Fault fluid geochemistry, Carbon isotope geothermometry