Research And Application Of Intedrated Geophysical Exploration Methods For The Precheck Of The Copper-Cobalt-Nickel Ores In Hudesheng

There are a large area of early proterozoic basic-ultrabasic rocks in the exposed pre-examination area,which indicates that the pre-examination area shows great prospect for finding copper-nickel sulfide minerals.However,Systematic geological exploration has not been carried out in the pre-survey area,and for basic-ultrabasic rocks,the understanding of mass distribution characteristics,metallogenic characteristics and buried depth is still seriously inadequate.In this paper,the 1:10000high precision magnetic scanning surfaces on the ground was carried out to search for the ultra-basic rock mass and understand the distribution range,distribution morphology and mineralization characteristics of ultra-basic rock mass on the surface.The magnetoelectric comprehensive profile was arranged in the area of magnetic anomaly,which was used to look for the enrichment area of mineralized alteration,fracture belt and metal sulfide.The measurement data were also further studied deeply.The data is dealt with lots of analysis methods such as reduction to the pole,continuation approaches,horizontal total gradient mode processing,wavelet multi-resolution analysis,wavelet fracture analysis and so on.For magnetic anomaly,it was divided by banding and local anomaly.Combined with regional geological map,qualitative and semi-quantitative interpretations were obtained for the delineated magnetic anomalies to identify areas,delineate the boundary of the magnetic body and scope and divide the fracture structures.This work finished 1:1 million high precision magnetic survey 90 km²,1:5000high precision magnetic survey section 22.54 km.The study areas delineated the 14places with?T planar abnormalities,including 7 places with basic-ultrabasic rock area distributions.According to the 1:10000 magnetic survey profile and 1:1 million magnetic measurement plane contour map together with a series of data processing maps,it explained four new structural fracture F₂₁?F₂₂?F₂₃?F₂₄ in the work area and extended one original structure F₁₇ as well.In the main magnetic anomalies and mineralization points of the survey area,the1:10000 IP gradient measurement was carried out with the measurement of 20.28 km,generally identifying the electrical characteristics of the magnetic anomalies and mineralization points and providing geophysical basis for the verification of geological engineering.