Abstract The study used total magnetic intensity (TMI) data to evaluate the incidence and characteristics of the Balapur fault in the Kashmir basin, NW Himalaya. The ground magnetic surveys were carried out at ~25 m station spacing in various linear profiles and grids across the fault. The magnetic measurements external to the Earth were recorded after every minute to remove the diurnal variations. The convenient filtering and derivative techniques were applied to the TMI database to assess the strike and subsurface constraints of the Balapur Fault. The study shows a clear relationship between the magnetic minima's and the inferred Balapur fault. The strike of the fault is found ~100 km from SE-NW of the Kashmir basin and is associated with several fractures throughout its course. The analysis also recorded TMI susceptibilities at the northwest Balapur fault in the Baramulla region where fault branching has also taken place. The study suggests that the fault is tectonically active and may host a significant magnitude earthquake in the region. The study also indicates that the fault may have further extensions and needs more subsurface geophysical studies. Further, our study signifies the role of ground magnetic surveys in subsurface fault evaluations.

中文翻译：

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喜马拉雅西北部克什米尔盆地巴拉普尔断层磁异常特征及地下构造约束

摘要 本研究利用总磁强 (TMI) 数据评估喜马拉雅西北部克什米尔盆地 Balapur 断层的发生率和特征。地面磁测量是在跨断层的各种线性剖面和网格中以~25 m 的站间距进行的。每分钟记录一次地球外部的磁测量，以消除昼夜变化。方便的过滤和衍生技术被应用于 TMI 数据库，以评估 Balapur 断层的走向和地下约束。研究表明，磁极小值与推断的巴拉普尔断层之间存在明显的关系。断层走向距离克什米尔盆地 SE-NW 约 100 公里，并在整个过程中与几条裂缝有关。分析还记录了 Baramulla 地区西北部 Balapur 断层的 TMI 敏感性，那里也发生了断层分支。研究表明，该断层构造活跃，可能在该地区发生重大地震。研究还表明，断层可能有进一步的延伸，需要更多的地下地球物理研究。此外，我们的研究表明了地磁测量在地下断层评估中的作用。