Dongchuan Mining Area Rock Magnetic Susceptibility And Its Application

In recent years,with the rapid of economical development of our country, the demand of mineral material also surged to meet our steps. However, with the degree of geological exploration work deepening,the outcrop and shallow mining of mineral resources reduced significantly year by year. This situation force explorers shift their target to Blind ore bodies and deep concealed ore bodies instead of Outcrop and shallow mining of mineral resources, which maybe companied with much more risk and difficulties.To this end, it need to study for new methods of prospecting.In this paper, in the basis of careful analysis for geological characteristics and ore-forming conditions in Dongchuan, through research of magnetic susceptibility of rocks to made prospecting forecast and target delineation and to explore new methods of prospecting.Dongchuan district in "Kang-Dian axis" Yunnan section of the north, for Rift Valley copper, the ore-forming function is volcanic exhalative hydrothermal deposits transformation superimposed. In the paper,through measuring and analyzing magnetic susceptibility, density and geological characteristics in Yin-Min and Lan-Niping mineral fields to identified lithologic characteristics and interpretated classification of strata, finally completed metallogenic prediction.1. According to drill core and trench measured stratigraphic sectionmine in Yin-Min and Lan-Niping mineral fields,to test the magnetic susceptibility.Through the analysis of magnetic susceptibility parameter variation to explore the relation of magnetic susceptibility and mineralization. Through the study, when the rock magnetic susceptibility K>50×10-3SI, it can be regarded as a initial target of ore delineation;then combined with the parameter of density parameters to analysis Fe,Cu grade,finally distinguish between rocks or minerals. This method is convenient and low cost, is a quick evaluation method that can be used as a kind of exploration of innovative ways to promote in this area with the same types of deposits.2. Through test the rock of magnetic susceptibility, in Lan-Niping intrusive rock found copper which contain mass Au associated with alkaline rock and Ag iron oxide copper gold (IOCG) ore. Such deposits has the broad prospects in Dongchuan district prospecting. 3. In Yin-Min district:"Xi-Kuangshan type " is one of the important deposit. By testing rocks of magnetic susceptibility,it can quickly delineste anomaly areas, direct looking for copper magnetite.As say:magnetic anomaly can look for magnetite, Indirect search for copper.