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A tectonic model of the Narmada region

机译：纳尔默达地区的构造模型

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Analysis of the reinterpreted results of the seismic refraction and wide-angle reflection data across Narmada-Son Lineament (NSL) indicates that the upper crustal features to the east and west of the Barwani-Sukta fault are different. To the west of this fault a graben exists under the Deccan volcanics, while to the east of it a north-south horst feature between the Narmada north and south faults divides the region in three distinct zones - north, middle and south. This feature is accompanied by upwarp in the mid-crustal as well as the Moho levels, suggesting deep-seated tectonics. The horst correlates with the gravity low axis of central India and large thickness of high density mafic material is present in the upper crust on both sides of it. The present-day crustal structure of the Narmada region appears to have developed in three major phases of the tectonic activity during the Archaean-Proterozoic, Jurassic-Cretaceous and late Cretaceous.
机译：对Narmada-Son Lineament（NSL）的地震折射和广角反射数据的重新解释结果分析表明，Barwani-Sukta断层以东和西部的上地壳特征不同。在该断层的西侧，Deccan火山下方有一个grab斗，而在其东侧，纳尔默达州北部和南部断层之间的南北向地壳特征将该地区划分为三个不同的区域-北，中和南。这一特征伴随着中地壳和莫霍面的上升，表明是深部构造。霍斯特与印度中部的重力低轴有关，并且在其上地壳的两侧都存在大厚度的高密度镁铁质材料。纳尔默达地区的现今地壳结构似乎在古生代-元古代，侏罗纪-白垩纪和白垩纪晚期形成了三个主要的构造活动阶段。

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