Magnetic Interpretation Of Ore-controlling Fault Zone In Some Certain Sea Area Of Laizhou Bay

With the rapid development of China's economy,China's consumption of gold has increased year by year,and has been the first in the world for many years.The increase of gold demand has increased the gold exploration task,and the gold deposits in Jiaodong area are rich.The distribution of gold deposits is mainly controlled by fault structures in the area.Along with the decrease of the shallow,surface and land mines in Jiaodong area,the exploration task gradually turned to the sea area in recent years.High precision magnetic survey has very wide applications for the exploration of fault zone.The purpose of this study is to predict the most possible position of gold mine by using high precision magnetic data and geological data in some certain sea area of Laizhou Bay.The rock construction in the study area is mainly metamorphic rock construction,sandstone construction,magmatic rock construction and conglomerate construction.The formation of Guojialing granite and Linglong granite in magmatic rocks is most closely related to gold deposits.The structure of the whole Jiaodong area is similar to a chessboard.The basement fold structure is mainly east-west,and the main fault tectonic lines are east-west,north-east and north-east orientations,and some north-west structures are also developed.The Sanshandao fault is closely related to the study area,and the rocks from top to bottom are: Jiaodong group rock,unaltered Linglong granite,weak to medium potassium feldspar or yellow iron silicate granite belt,fault Muddy,medium to strong yellow iron sericite granite zone,medium to strong kalclic granite belt,unaltered Guojialing granodiorite.From the magnetic anomaly contour map and plane profile,10 magnetic anomalies are divided into the study area,and each magnetic anomaly is explained separately.The anomalies of each magnetic anomaly are obtained by the method of empirical tangent method Center,long axis,short axis,buried depth and other data.Based on the analysis of the magnetic anomaly,the F1 fault zone,the F2 fault zone and the F3 fault zone in the northwest direction of the study area are deduced,and the model is analyzed on the basis of ModelVision Program.The possible spatial distribution of the three faults is deduced according to the high precision magnetic data inversion.Based on the observation of the F1 fault zone and the F2 fault zone,according to the misalignment of the magnetic anomaly,a north-east fault zone is traced.According to the existing geological data,it is very likely that the fault is the Sanshandao fault.Singlely using the high-precision magnetic data to explain the study area has a multi-solution,with other geophysical,geological and geochemical exploration data can better explain and construct the evaluation of regional distribution and the distribution of gold deposits.After further exploration of other information in the study area,the work done in this paper can be used as a basis for further research.