The eastern margin of the Chitradurga Schist Belt is widely believed as the dividing line of Dharwar Craton (DC) into Western Dharwar Craton (WDC) and Eastern Dharwar Craton (EDC). This study aims at re-defining the division of DC based on pronounced gravity high encompassing Chitradurga Schist Belt of WDC and Closepet granite to Ramgiri–Penackacherla Schist Belt of EDC. The newly acquired high-resolution gravity data by the Geological Survey of India covering the Chitradurga Schist Belt and adjoining areas coupled with the available regional gravity data gives ample opportunity to understand divisions and opens up the possibility of grouping Chitradurga Schist Belt with the transitory block between WDC and EDC. This new data clearly suggests that there is a crustal sub-block between WDC and EDC and the boundaries are characterized with significant gravity signatures. Further, this data indicates that the first division should be at the end of Shimoga–Bababudan Schist Belts up to the arms of Chitradurga Schist Belt, with a significant and corroborative observation of deep crustal rocks in the form of the Sargur group of rocks. From this division to a narrow corridor of gravity lows bounded with high gravity gradients, representing a possible suture zone near Ramagiri–Penackacherla Schist Belt, is the suggested geographic disposition of Central Dharwar Craton (CDC). Similarly, a corridor of gravity lows bounded with gravity high gradients is identified as a possible subducting zone separating CDC and EDC between Ramagiri–Penackacherla Schist Belt and Kolar Schist belt. The above postulation has evidence from the five long profiles of 330 km (75°–78°E), separated with 30′ interval, from the gridded new data. It is clearly seen that the major changes in the crustal architecture are around the intervening portions of Shimoga–Chitradurga Schist belts and end of RPSB, characterized with sharp paired anomalies. In comparison, only small changes were highlighting the eastern margin of the Chitradurga Schist Belt. Processed maps suggested the possibility of hitherto unknown ancient suture zone east of Ramagiri–Penackacherla Schist Belt in the form of a narrow zone of gravity lows, not related to surface geology. Accordingly, gravity models are proposed after fixing the regional field from the 5th order polynomial. A comparative study is made with the published seismic studies. Accretionary models of DC along 14°N and 14°30′N are proposed from the gravity signatures.

Chitradurga 片岩带的东缘被广泛认为是 Dharwar Craton (DC) 分为 Western Dharwar Craton (WDC) 和 Eastern Dharwar Craton (EDC) 的分界线。本研究旨在根据显着的重力高度重新定义 DC 的划分，包括 WDC 的 Chitradurga 片岩带和 Closepet 花岗岩到 EDC 的 Ramgiri-Penackacherla 片岩带。印度地质调查局新获得的涵盖 Chitradurga 片岩带和邻近地区的高分辨率重力数据，再加上可用的区域重力数据，为了解划分提供了充足的机会，并开辟了将 Chitradurga 片岩带与之间的过渡块分组的可能性。 WDC 和 EDC。这个新数据清楚地表明在 WDC 和 EDC 之间存在一个地壳子块，并且边界具有显着的重力特征。此外，该数据表明，第一次划分应该在 Shimoga-Bababudan 片岩带的末端，直到 Chitradurga 片岩带的臂部，对 Sargur 岩石群形式的深层地壳岩石进行了重要和确凿的观察。从这个分界到一条狭窄的重力低带，以高重力梯度为界，代表了拉马吉里-佩纳卡切拉片岩带附近可能的缝合带，是达尔瓦尔克拉通中部（CDC）的建议地理分布。相似地，一条以重力高梯度为界的重力低谷走廊被确定为一个可能的俯冲带，将拉马吉里-佩纳卡切拉片岩带和科拉尔片岩带之间的 CDC 和 EDC 分开。上述假设从网格化的新数据中间隔 30 英尺的 330 公里（75°–78°E）的五个长剖面中得到了证据。可以清楚地看到，地壳结构的主要变化是围绕 Shimoga-Chitradurga 片岩带的中间部分和 RPSB 的末端，以尖锐的成对异常为特征。相比之下，Chitradurga 片岩带的东部边缘只有很小的变化。处理后的地图表明在拉马吉里-佩纳卡切拉片岩带以东可能存在迄今未知的古代缝合带，其形式为狭窄的重力低带，与地表地质无关。因此，重力模型是在从 5 阶多项式中固定区域场后提出的。与已发表的地震研究进行了比较研究。根据重力特征提出了沿 14°N 和 14°30'N 的 DC 增生模型。