Gravagnetic Anomalies And Ore Prospecting In The Area From Hancheng To Fuping County At The Northern Side Of The Weihe River

Volcanic sedimentary metamorphic iron ore is one of the important types of iron ore and the Sushui Group is one of the host strata of this ore type in Shaanxi Province. The aeromagnetic anomaly zone along the counties of Hancheng, Heyang, Pucheng and Fuping in the northern side of the Weihe River is featured in high amplitude and large scale,appearing in multiple anomaly trap centers arranged in a string of beads, mainly composed of the Cenozoic strata at the ground surface. Whether this magnetic anomaly zone corresponds to the concealed Sushui Group where magnetite occurs as a whole, and if so, how about their distribution? Based on regional tectonics, three-dimensional inversion results of aeromagnetic △ T and inversion interpretation results of gravity, magnetic and electrical integrated geophysical profiles at a scale of 1:50,000, the inference basis for the overall corresponding blind Sushui Group and its distribution shape along the aeromagnetic anomaly zone appearing at the counties of Hancheng, Heyang, Pucheng and Fuping is proposed in this paper for the first time. At the same time, the whole strata of the blind Sushui Group have shapes like a fold, with NE-SW spreading, steep angle at the northwest wing and slow southeast wing. The inference of this blind Sushui Group is helpful to the prospecting and prediction of the Yangshanzhuang type iron ore in the volcanic sedimentary metamorphic type of iron ore in Shaanxi Province.