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Aeromagnetic Characterisation of the Breccia Zone at Machanur, Dharwar Craton.

Dharavathu S, Kosuri SK, Kumar P.

MINERALS

https://doi.org/10.3390/min16060581 

A comprehensive analysis to high-resolution aeromagnetic data was carried out to characterise the Breccia zone at Machanur, Dharwar Craton and identify structural features associated with Copper mineralisation. Spectral, 2D, and 3D modelling indicate that the breccia zone extends to an average depth of about 400 m and is structurally controlled. Integration of aeromagnetic results with previous geological, petrological, and borehole data suggests that the mineralisation continues beyond 350m depth. The mineralised zones are characterised by sulphide veins containing chalcopyrite, pyrite, covellite, chalcocite, cuprite, bornite, and are associated with hydrothermal activity.

Fig: Detailed geological map of study area (https://geodataindia.gov.in).
distribution of mineralisation within the breccia zone at Machanur (after Shukla et al., 2016), and the results of 3D magnetic inversion model showing
Observed
Predicted magnetic anomaly, and
Topography and magnetic susceptibility iso-surface map.

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