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地质学报  2006 

新疆富蕴--库尔勒剖面接收函数方法获得的地壳上地幔结构成像

, PP. 135-141

Keywords: 天山,接收函数,Moho面,深部构造

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Abstract:

利用远震接收函数方法处理宽频地震探测数据获得富蕴-库尔勒剖面地壳上地幔结构转换波成像.中天山南缘断裂下方自南向北Moho转换界面具有向北倾斜的特征,且此转换界面有间断,深度逐步由50km加大到60~70km.北天山北缘断裂北部下方相对连续的转换界面明显以较小的幅度向南俯冲延伸到80~90km深度.中天山南缘断裂到乌鲁木齐之间,除间断、斜交和叠置的Moho转换界面外,还可见其他转换界面.乌鲁木齐以北,进入准噶尔盆地Moho转换界面相对平缓深度在50km上下,最深处靠近天山附近.天山Moho面的加深、重叠以及地震发生的深度表明本区天山构造活动较强,天山的山根深度近100km.相对于天山西段本区南北向的推挤作用明显减弱.

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