An Improved Tilt Angle Method and Its Application:A Case of Weigang Iron-Ore Deposit,Jiangsu
Liu Pengfei
Liu Tianyou
Yang Yushan
Zhang Henglei
Liu Shuang
Abstract：In order to slove the “singularity”problem of Tilt angle,an improved tilt angle method to detect the field source boundaries is proposed in this paper.Theoretical simulations reveal that improved Tilt angle method inherits the properties of the 1st order vertical derivative and traditional tilt gradient that identifies boundaries by zero value line and it is better for the deep weak anomalies identifica-tion than other methods such as the total module of horizontal gradient.Besides,the improved Tilt angle method avoids the abnormal degeneration due to its clear physical significance.Magnetic anomalies of the Weigang iron-ore deposit is analyzed and anomaly D is sig-nificantly enhanced except for three main anomalies of A,B,C,which indicates that the weak anomaly D is caused by deep concealed orebodies.The orebody depth is found as 1 000-1 200 m,based on the interactive inversion results of the 2.5 dimension.DH6-6 drilled hole is located in line 6,exactly on the east side of anomaly D,which coincides with the boring drilling of thin ore body.No-mine DH6-7 drilled hole is located at the outside of the weak anomaly area.It is possible that iron orebodies may be discovered if a drilled hole is arranged to the west and the north of Line 5.
Keywords：Tilt angleboundary detectioncrisis miningWeigang iron-ore depositgeophysics
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 2101-2112 )