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Delineation of concealed banded iron formations (BIFs) below the Kurnool sediments in Palnadu Sub-basin, Macherla region, Cuddapah Basin through 3D inversion of aeromagnetic data.

Seshu D, Kumar K, Sivasankar P, Kumar P.

Geosystems and Geoenvironment

https://doi.org/10.1016/j.geogeo.2025.100357 

Long linear high-intensity aeromagnetic anomalies are observed south of Vijayapuri to Macherla region, Cuddapah basin. The source of these magnetic anomalies is exposed and concealed BIFs with alternate layers of magnetite and quartzite. These BIFs are associated with greenstone belts of the Archean age capped by Kurnool and Cuddapah sediments. It is inferred from the 3D model studies, exposed BIFs at Vijayapuri region are dipping towards Macherla from the surface to extend up to a depth of 2600 m.

a) The Geological map b). The TMI anomaly map with identified magnetic anomaly zones A, B and C. c) South view of 3D inversion of ASVI anomaly of the study area with isosurface susceptibility contrast of 0.115 SI units shows the three intrusive/ridge-like bodies below the identified magnetic anomaly zones A, B and C.

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