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一、台站环境及地质构造情况高台基准地震台始建于60年代中期,地处河西走廊中西段,地理坐标为北纬39.4°,东经99.7°。台基岩性为地球深部侵出地表的大面积完整裸露的花岗岩体,背景干扰小。本台位于青藏高原北部边缘,祁连山北缘逆冲断裂带中段,线状褶皱非常发育,垂直差异运动强烈,是地应力易于积累的地区。区域地质构造以合黎山—龙首山北西西向隆起带为主,西起金塔,东至河西堡东,总体走向呈N50°～60°W,其间与高台—榆木山构造带
First, the station environment and geological structure Gaotai reference seismic station was built in the mid-1960s, is located in the western section of the Hexi Corridor, the geographical coordinates of 39.4 ° N, longitude 99.7 °. The bedrock lithology is a large-area, completely exposed granite body that invades the Earth’s deep surface and has little background interference. This station is located in the northern margin of the Qinghai-Tibet Plateau, the northern Qilian Mountains northern thrust fault zone, linear folds are very developed, strong vertical movement, is easy to accumulate stress in the area. The regional geological structure is dominated by Heli-Longshoushan Northwest-West Uplift Belt, west from Quinta and east to Hexi Fort East, with an overall strike of N50 ° ~60 ° W. In the meantime,