The late Archean Western Dharwar Craton supergroup has volcanic and sedimentary rocks deposited during 2900–2600 Ma underlain by the Sargur Group basement of 3.36–3.2 Ga granitic gneiss and older supracrustal rocks. The western part of the craton, known as the western province (Dharwar Foreland), comprises four major schist belts (Western Ghats-Bababudhan-Shimoga-Chitradurga). A regional gravity and magnetic (Total Field) survey was done in the Shimoga region. The geophysical data of the study area reveal the subsurface extension and behaviour of the exposed rocks of the area. The Euler deconvolution was used to define the depth of the anomaly sources. Euler depth solution for the spherical body (structural index 2), window size = 10, and depth tolerance = 5% depicts the depth of the various sources. The Euler depth solutions cluster over the hook-shaped schist rock of the Medur group (at the northern part of the area) reveals that the body's depth varies from 1 to 4 km in the central part, and at the northern flank, it goes up to 7 km. The solution also brought out the depth of the anomalous body near Hithala, within 4 km. The 2D forward depth modelling of the anomalous zone brings out the involvement of the tectonic forces in the generation of this anomalous body. The more precise depth from the model has been estimated between 2 and 3 km. The model clearly shows the relationship between schist rocks and the basement. However, the high-gravity anomaly has been modelled as the manganese bearing horizon, which has come to optimum depth because of folding and faulting in the region, thus providing a favourable zone for manganese deposition.

晚太古代西达尔瓦尔克拉通超群有 2900-2600 Ma 沉积的火山岩和沉积岩，其下方是 3.36-3.2 Ga 花岗片麻岩和较古老的表壳岩的萨尔古尔群基底。克拉通的西部部分被称为西部省份（达尔瓦尔前地），由四个主要片岩带组成（西高止山脉-巴巴布丹-希莫加-奇特拉杜尔加）。在希莫加地区进行了区域重力和磁场（总场）调查。研究区的地球物理数据揭示了该地区裸露岩石的地下延伸和行为。欧拉反卷积用于定义异常源的深度。球体的欧拉深度解（结构指数 2）、窗口大小 = 10、深度容差 = 5% 描述了各种源的深度。欧拉深度解聚集在 Medur 群的钩状片岩（位于该地区的北部）上，表明该体的深度在中部为 1 至 4 km，而在北侧则上升。至 7 公里。该解决方案还显示了希塔拉附近异常体的深度，在 4 公里以内。异常带的二维正向深度建模揭示了构造力参与了该异常体的生成。模型的更精确深度估计在 2 至 3 公里之间。该模型清楚地显示了片岩与基底之间的关系。然而，高重力异常被模拟为含锰层位，由于该地区的褶皱和断层作用，含锰层位已达到最佳深度，从而为锰沉积提供了有利区域。