Fractures are the prominent deformation-induced structural features that develop in the rocks under brittle regime. Establishing a relationship between structural development and paleostress orientations is thus necessary to propose the comprehensive tectonic models of the study area. The study area lies in Lesser Himalaya (LH), which is restricted by the Main Central Thrust (MCT) in the north while the Main Boundary Thrust (MBT) lies south of it. This study aims to analyze the fracture pattern in the rocks along the Main Boundary Thrust (MBT, NW Himalaya, Pakistan) and perform paleostress analysis. Fifty different circle inventories were drawn in the field and 550 individual fracture orientations were observed and recorded. The data obtained includes orientation (dip amount, direction and strike) of fracture planes, density in terms of abundance within the definite area and fracture filling material within the circle. The fracture data is then interpreted through Win-Tensor program for paleostress inversion. It is a computer interactive program based on Right Dihedron Method for fracture analysis and paleostress reconstruction. The results demonstrate a compressive tectonic regime with ~NNW–SSE trending σ₁. It is suggested that the Main Boundary Thrust (MBT) is developed almost perpendicular to maximum principal stress orientation.

裂缝是脆性状态下岩石中显着的变形诱导结构特征。因此，建立构造发育与古应力方向之间的关系对于提出研究区的综合构造模型是必要的。研究区位于小喜马拉雅山（LH），北部受主中央逆冲推力（MCT）限制，南部受主边界逆冲推力（MBT）限制。本研究旨在分析沿主边界逆冲断层（MBT，NW Himalaya，巴基斯坦）岩石的断裂模式并进行古应力分析。在现场绘制了 50 个不同的圆形清单，并观察并记录了 550 个单独的裂缝方向。获得的数据包括断裂面的方向（倾角、方向和走向），密度在一定区域内的丰度和圆圈内的裂缝填充材料。然后通过 Win-Tensor 程序解释裂缝数据以进行古应力反演。它是一种基于右二面体法的用于裂缝分析和古应力重建的计算机交互程序。结果表明具有~NNW-SSE趋势的压缩构造体系σ ₁。建议主边界推力 (MBT) 几乎垂直于最大主应力方向发展。