Efficiency of Magnetic Methods in Explorations for the Construction Raw Materials

Summary This paper reviews the specifics of the magnetic methods in its application and its particular effectiveness in the exploration for intrusive rocks deposits (mainly with diorite and dactic compound — usually/ potentially a good source of gravel raw materials) using the case studies collected at the foothills in the Southern part of the Crimea peninsula. The combination of detailed magneto-prospecting methods used includes land high-precision measurements of a magnetic susceptibility on rock outcrops and on core samples taken from the exploration wells. Such approach not only allowed to contour the intrusive bodies, but, for some cases, successfully calculate the potential volume of the raw material deposits. This article also presents the comparison example of the mineral stock calculation based on the contours derived from the magnetic field data versus the drilling data. The high cost-efficiency of a detailed high-precision magnetic exploration is demonstrated in the article in its particular application for finding and delineating of the intrusive granodiorite and diorite bodies. Such high efficiency can also be achieved in a broader application of the magnetometric method when searching for shallow accumulations of raw gravel materials of diorite and dacitic composition with high magnetic properties contrast.