Application Of Gravity And Magnetic Method To Metamorphic Type Iron Deposits In Heilongjiang Province

Based on the analysis of geophysical and geological information of Heilongjiangprovince iron mine, and closely integrated research, we found that Heilongjiang provinceiron type is mainly metamorphic iron. According to the Heilongjiang provincesedimentary metamorphic iron deposit’s geological background, the quality of the oredeposit, geological characteristics, metallogenic conditions, we choose the representativeore deposit occupies an important position. We Select Shuangyashan City Yangbi hill ironore, Tangyuan county east hill iron ore as typical ore deposit. Based on the knownmagnetic mineral geological tectonic background, analyzing the geophysical andgeochemical characteristics, we summarized the metamorphic iron ore depositgeology-geophysical model, prospecting marks and Heilongjiang province metamorphiciron ore forming elements and predictive factors. Then take the ore-bearing geologicalbodies and magnetic high anomaly region as the delineation basis, take the remote sensing,gravity anomaly, as the delineation basis, according to prognostic factors, spatialsuperposition method for spatial evaluation, at the same time through comprehensivegeological research take further modified and screening, to delineate the Heilongjiangprovince metamorphic type iron ore prediction area. We found that the Yangbi hill typemetamorphic iron ore in Heilongjiang province has nine forecast areas, Dongfengmountains metamorphic iron deposits in Heilongjiang province has three forecast workareas.Based on the geological and geophysical analysis of geophysical profile, we researchthe typical iron ore deposits of different spatial scales by comprehensive information study,and provide magnetic data infer information to metallogenic background and fundamentalgeological research. The construction of geological-geophysical prospecting model is forsieving ore-induced anomaly, provides reference and application example in the follow-up metamorphic iron ore prospecting work of the Heilongjiang province, realizes the mode ofprospecting. Based on the two metamorphic iron ore prediction areas aeromagnetic, andknown iron ore area geomagnetic profiling data we have the positive-inversion in theprovince, we get the preliminary estimation of Heilongjiang province metamorphic typeiron ore resources.