Extraction of Anomalous Information from Geochemical Exploration of Cu Elements and Analysis of Prospecting Potential in Eastern Hebei
The eastern area is an important copper-molybdenum polymetallic metallogenic belt in Hebei Province.The delineation results of 1∶200 000 geochemical anomaly show that the Cu element anomaly is scattered in nearly east-west direction,and the degree of coincidence with ore deposits is poor.In order to extract mineralized anomalies,effectively analyze the controlling factors of anomaly distribution,this paper uses multifractal S-A anomaly decomposition and local singularity method to analyze geochemical exploration data.Analysis shows that the spatial distribution of Cu is controlled by the distribution of metamorphic rocks.In order to eliminate the interference of regional factors,the S-A method is used to decompose the geochemical exploration data.The results show that the background field of Cu element is also distributed in an east-west direction,which further proves that the spatial distribution of Cu element is controlled by metamorphic rocks in the uplift area.The coincidence degree between the decomposed Cu anomaly field and the copper mineralization point is significantly improved,and some new favorable metallogenic areas are ringed.In order to identify and extract weak anomalies,the local singularity method is used to process the data.The results of S-A analysis show that the anticlinal core anomaly weakened significantly,and several favorable ore-forming areas were ringed in the carbonate strata of the northern flank.Combined with the analysis of regional tectonic evolution and metallogenic geological conditions,the deep ore-prospecting potential of Malanyu anticlinal core was limited,and the northern flank should be the key area to search for porphyry-skarn copper polymetal.
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