Geophysical survey based conceptual model for search of sub-surface diamondiferous kimberlite source in vindhya range of Central India

Abstract

Geomagnetic and gravity surveys at the surface have been coupled to explore the possibility of concealed kimberlite/lamproite pipes under the sedimentary cover of the KaimurGroup of rocks of the Vindhyan Supergroup. A bipolar high magnetic primary source, based on the airborne magnetic survey, was confirmed by surface-magnetic and gravity survey of the area beneath sandstone at an estimated depth of about 150 m.Finally, based on the geological and geophysical interpretation of the area and the results obtained from the analysis, to confirm the possibility and determine the geometry and size of concealed diamondiferous kimberlite/lamproite pipes under the platformal marine sediments of the Vindhyans, a detailed investigation is warrantedfrom the rock samples obtained from the exploratory boreholes.