Geochemical Anomaly Information Extraction And Evaluation In Northwest Guizhou

The Geochemical information is a kind of Micro-mineralized outcrop,itcanprovide directly information for mineral exploration to improve the efficiencyofprospecting.The research area is located in theNorthwest Guizhou province,lead andzinc output of the main areas of Guizhou Province, the complexity of the regionalgeological background, lead and zinc geochemical anomalies,how scientific andrational screening and evaluation of these anomalies is the key to determiningprospecting effectThis article on the basis of the analysis of regional ore-forming geologicalbackground,researched and evaluated the distribution feature of regionalgeochemicaldatum,the geochemical background,the classification of anomalies,theextractionand screening of geochemical anomaly information and the mineralexplorationpotential of these anomalies in the study area.Ore body of the deposits ofthe study area located in the Shang si Formation (C1s), Bai zuoFormation (C1b),Huanglong Formation (C2h).It was found in the research that the content of stream sediment’s instructionentsmatched a multimodal distribution or approximate lognormal distribution, not thenormaldistribution or lognormal distribution.the research ofsilicon, aluminum andiron, calcium and sodium, potassium, magnesium seven element analysis of data tocarry on the factor analysis, through the factor analysis, according to differentgeochemical environment divided into different geochemical properties of thegeological unit.Stream sedimentgeochemical background and gives geological unit ofclose relationship, different geological unit have different geochemical backgroundvalues.Based on processed the raw data of sediment’s instruction with the scaleof1:200,000and delineated every contrast anomaly of all the elements respectivelywiththe two methods of“double window moving average method”and“subintervalarea anomaly threshold contrast filtering method”,Contrasting the delineatedabnormity by the two methods, it is considered that the sub-area lower limit ofabnormity contrast filtering method is more reasonable in study area.According to the abnormal combination of elements, the center and strength ofabnormal concentration, area and continuity of abnormity and strength of abnormitycontrast filtering of multi-element combination,39integrated abnormity are screenedout. The possibilities of mineralization about every abnormity are also sorted by usingthe mineralization scale of front halo, ore body elements and tail halo, respectively, which will be helpful during the work of abnormity verification.Sort former exceptionof known deposits are in good agreement, on the20th before the sort of abnormalmineralization potential, the next step is recommended to verify priority.