乌鲁木齐──库尔勒地震转换波测深

SEISMIC CONVERTED WAVE SOUNDING ON URUMQI─KUERLE PROFILE

利用天然地震转换波研究了天山地区乌鲁木齐─库尔勒剖面的深部构造特征。地壳中存在5个较明显的速度界面（包括莫霍面），并被数条断裂切割，相应地分为5个构造单元；天山中部的界面均有不同程度的抬升，在地壳中形成逆冲断裂，而地壳的厚度小于南北两侧地区，表明地幔的物质向上隆起，有可能造成地壳平均密度增加；天山南缘的和静、巴伦台一带断裂错综复杂，界面严重变形，是未来构造活动比较强烈的地区。

The characteristics of deep structure are researched by using natural converted wave on Urumqi —Kuerle Profile in Tianshan area. The studying result shows: There are five obvious velocity interfaces including Moho,and they are cut by several faults,thus being divided into five structural units; The interface in the middle of Tianshan has lifted in different extents,forming thrust faults. Howerer,the crustal thickness at this area is less than that at its both sides of south and north,that shows the lifting of mantle material possibly increases the average density of crust; At the area of Hejing and Baluntai on southern edge of the Tianshan,the faults are complicated,and the interfaces deform severely,so this is an area where tectonic activity is relatively strong in future.