Characteristics of integrated 2.5D gravity and magnetism inversion profiles in the ore cluster areasin the eastern section of northern Ningwu

Based on a number of drilling, geological and ore data, five main NW-trending profiles crossing main deposits and structures in the eastern section of northern Ningwu were selected to conduct an integraged 2.5D inversion investigation using the previous gravity and magnetic data. Inversion results and schematic 3D diagram of the cross sections in the study area suggest that diorite porphyrite or pyroxene diorite porphyrite closely related to mineralization is buried shallower in west than in east. There is likely occurrence of hidden terranes in the deeper part of the central uplift area. Our interpretation for the results indicates that the depth of ore-bearing Huangmaqing Formation gradually increases from the outcropped central uplift zone to northwest and southeast, with depth increasing quicker in the northwest than in the southeast. Gravity anomoly in this areas is much distinctive for fault than magmatic anomoly. This study displays visually the characteristics of geological structure and spatical distribution of substrate in the eastern section of northern Ningwu, which can provide some reference for further prospecting work.