Application of geophysical techniques in uranium exploration along the Albitite line, Kerpura-Karoi area, Sikar District, Rajasthan

Detailed Induced polarization (IP) and magnetic surveys were carried out around southwest Kerpura-Karoi area in Sikar district, Rajasthan. This area falls in the northern extension of well known Rohil Uranium Deposit (RUD), along the albitite line. Surface and subsurface geological data of the area suggest that uranium mineralization is structurally controlled, associated with deep seated fractures/along axial regions of folds. Major features in the study area have NE-SW trends where uranium mineralization is also associated with disseminated sulphides. Samples collected from this area for petro-mineralogical studies indicated the presence of sulphides and magnetic minerals. Magnetic and IP surveys were conducted along N30°W-S30°E direction perpendicular to the general structural trends in Kerpura. Total magnetic intensity (TMI) anomaly and reduced to pole (RTP) anomaly images, deciphered high order linear magnetic anomaly trending N40°E-S40°W in the northern part of the area. A series of parallel, arcuate shaped magnetic anomalies in the southern part of the survey area were also identified, the causative source of which are amphibolites/pyroxenites