【摘要】 从深部构造的角度对青藏高原东北缘似三联点构造进行了探讨。人工地震资料反演结果表明,该区的地壳结构与其它地区明显不同Moho面为一复杂的过渡带,而不是尖锐的速度间断面;在该区内存在一组弧形构造,各弧形断层在形态、规模和破碎程度方面的差异,反映了青藏高原块体向东北方向强烈的挤压作用及其传递过程。更多还原

【Abstract】 The quasi tri-junction in the northeastern margin of the Qinghai-Tibet plateau is discussed from the viewpoint of deep structures. Results inversed from deep seismic sounding data show that the crustal structure of this quasi tri-junction is quite different from the other regions. In this region, the Moho is a complicated transitional zone rather than a sharp discontinuity. Furthermore, there is a set of arcuate tectonic zones. The differences of the arcuate fault zones in shape, scale and fractured extent indicate the strong compression from the Qinghai-Tibet plateau toward the NE direction and its transmission process.更多还原