Application of comprehensive geophysical exploration methods in the exploration of rich iron ore in Wangwangzhuang Mining Area, Jinling, Zibo

The Jinling rock mass in Zibo is mainly the fine-grained hornblenite of Shangshuihe unit of the Early Cretaceous Yinan sequence, which is found in Huashan, Tieshan, East Yinijia-West Yinijia area in the middle east region. It is a mesobasic, neutral and mesobasic complex, which belongs to the intrusives formed in different sequences at the same homology period. Jinling pluton is one of the main ore-forming pluton in Shandong Province, and several large iron deposits are developed in the area. According to the data, iron ore, as a major strategic mineral in China, is still in a state of shortage, and many mining enterprises in the area have been shut down, and some mining enterprises are also facing the situation of resource depletion. Therefore, it is still the key direction of the next stage of work to carry out mineral exploration and seek a breakthrough in the periphery of Jinling rock mass. In the past, a single method was used in geophysical exploration, which has fewer constraints and low calculation accuracy, and is not of strong guiding significance to prospecting and exploration, resulting in a great difference between the results of drilling and geophysical interpretation. By using high-precision gravity profile survey, high-precision magnetic profile survey, controlled source audio magnetotelligm-sounding（CSAMT）, three-component magnetic survey in borehole and joint inversion and interpretation of geological data, and adding inversion constraints, the calculation accuracy can be greatly improved, the effectiveness of the method is verified, and more basis is provided for guiding the later drilling layout. It provides more methods to support the breakthrough of deep and peripheral prospecting of Jinling rock mass.