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Determining the density of different regions of Peninsular India and analyzing the deep crustal structure beneath the Saurashtra peninsula using the fractal method.

Chowdari S, Singh B.

PHYSICS OF THE EARTH AND PLANETARY INTERIORS

https://doi.org/10.1016/j.pepi.2025.107489 

This study uses a fractal analysis of gravity data to estimate Bouguer slab densities across several regions of Peninsular India instead of using a single standard crustal density value. The results show clear regional density variations linked to geology. In the Saurashtra peninsula, higher density reflects Deccan volcanic rocks and deep mafic underplating. Integrated gravity and seismic modeling reveals a thickened crust and strong isostatic compensation, highlighting the role of magmatism in shaping deep crustal structure.

Residual fractal dimension versus density plot.
2½-D subsurface density model along the W-E profile A-A1 crossing Junagadh and Amreli.

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