Research On Attributes And Distribution Characteristics Of Magnetic Body In The Middle Section Of North Qinling

The north of the middle section of the northern margin of the Qinling Mountains in the study area is bordered by the Weihe Basin.The predecessors have conducted a lot of research on the structural characteristics,structural evolution,faults and granite distribution in the northern margin of the Qinling Mountains and obtained a series of results.The Weihe Basin in the northern part of the study area is rich in helium resources.Its helium source rocks are mainly granites developed in the northern margin of the Qinling Mountains and the interior of the basin.However,there are few studies on the properties and distribution characteristics of helium source rock granites.In order to study the properties and distribution characteristics of granite and provide a basis for the investigation of helium resources in the Weihe Basin,this paper uses the methods of magnetic pole,moving average and Euler deconvolution to process and interpret the data,and analyzes the characteristics of magnetic anomalies in the study area.The distribution characteristics of the magnetic body were determined,the cause of the magnetic anomaly was explained,the burial depth of the magnetic body was calculated,the thickness and magnetic susceptibility of the magnetic body in the study area were calculated inversely,combined with the geochemical data in the study area,the Qinling North was calculated The amount of helium resources in the middle of the margin.The main results and conclusions achieved are:1.The regional magnetic anomalies in the study area are characterized by high in the east and low in the west.The regional magnetic anomaly caused by the basement uplift in the east is high,and the low magnetic anomaly caused by the base depression in the west.2.The magnetic anomaly is an EW-strike high-frequency high-value positive magnetic anomaly band in the piedmont fault on the northern margin of the Qinling Mountains.This area is the junction of the Yangtze Craton and the North China Craton.A large amount of magmatic rock or mantle material upwelled,leaving this area Magnetically obvious.3.There are 7 magnetic bodies in the study area,including Taibai magnetic body,Huashan magnetic body,Muhuguan magnetic body,Laoniushan magnetic body,Cuihuashan magnetic body,Lantian magnetic body and Zhongnanshan magnetic body.Its size varies,most of the buried depth of the magnetic body is about7000m,the thickness is 2500-7500m,and the magnetic susceptibility is about 18×10^-5×4?SI-23×10^-5×4?SI.Paleozoic granite is mainly distributed in the southern part of the study area,Mesozoic granite is distributed in the east of the study area,and a small amount is distributed in the south.The type of granite is mainly type?granite.4.It is estimated that the resource of helium produced by granite in the study area is 6.48×10⁹m³.