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申扎-定结正断层体系是发育于青藏高原中南部的近南北走向大型伸展构造,其中段发育于特提斯喜马拉雅地块,由早期岩浆核杂岩和后期向北西西倾斜的中等倾角正断层组成,岩浆核杂岩由糜棱岩化浅色花岗岩组成,顶部发育低角度拆离断层,上覆浅变质沉积岩系.正断层体系南段表现为具有典型构造组合特征的、倾向南东东的拆离断层,下盘为高喜马拉雅岩系.本区藏南拆离系（STDS）为由糜棱岩化浅色花岗岩形成的韧性剪切带,并被时代较晚的申扎-定结正断层体系切割,说明STDS并不是南北走向伸展构造的控制或调节构造,而南北走向伸展构造可能是南北向挤压的变形分解产物.
The Xinsha-Dingjie normal fault system is a large extensional structure near the north-south trending in the central southern part of the Qinghai-Tibet Plateau. The middle fault zone is developed in the Tethyan Himalayan massif and is composed of early magmatic core complexes and moderate dip at a later stage The magmatic core complex is composed of mylonitic light-colored granite with low-angle detachment faults on the top and superficial metamorphic sedimentary rocks. The southern segment of the normal fault system is characterized by typical tectonic assemblages, Of the detachment fault, and the lower plate is the high Himalayan rock series.The southern part of the southern Tibet detachment system (STDS) is a ductile shear zone formed by mylonitic light-colored granite, The normal fault system shows that the STDS is not a controlled or regulated structure of the strike-strike extension structure of the north-south direction, while the extension strike structure of the north-south strike may be the deformation decomposition product of the north-south extrusion.