Analysis of exploration effect of spread spectrum induced polarization(SSIP)method——Taking the exploration of Dongxiangqiao manganese deposit in Lingling district,Yongzhou City,Hunan Province as an example
On the basis of fully studying the geological background conditions of the exploration area,this article first uses spread-spectrum induced polarization(SSIP)to explore manganese ore resources in the Qiling Basin.Through the analysis of the inversion results of SSIP sounding using the forward and inversion pole-dipole array,a relatively continuous high polarization anomaly zone was discovered,with an intensity 10 times higher than that of the surrounding rock,protruding and stable;The inversion results of apparent resistivity show the characteristic of U-shaped basin shaped high resistive basement enveloping low resistive zone,suggesting that its high polarization anomaly zone is caused by underground mineral deposit;The inclusion of high resistive basin bot-tom and low resistive zone indicates that the strata are controlled by syncline structures,consistent with known syncline structures.Through drilling and exploration,two relatively continuous manganese ore veins were discovered,with a thickness of 0.9 m to 2.8 m and a grade of 9.3%to 15.2%.They are associated with pyrite and coexist in limestone.Through experimental results of SSIP survey and drilling verification,it was found that the polarization anomaly is very consistent with the depth and shape of the ore vein exposure,and the resistivity anomaly reflects the distribution of the mining area strata well.Therefore,the effectiveness of the SSIP method in the exploration of manganese carbonate mineral resources is verified.
NETL
NSTL
万方数据
