Regional geochemical indicators of largesized silver polymetallic deposits in Daxing anling Metallogenic Belt

Abstract

Abstract:

Regional geochemical indicators for prediction of largesized ore deposits were established by using geochemical mapping data in the Daxinganling Metallogenic Belt, Inner Mongolia. Geochemical provinces delineated by 1∶1000000 geochemical mapping are closely correlated with ore districts and regional geochemical anomalies delineated by 1∶200000 geochemical mapping have a good relationship with largesized ore deposits. Geochemical indicators based on the three large AgPbZn polymetallic deposits in Daxinganling show that (1) Ag, Pb and Zn anomalies are consistently distributed across the large deposits; that (2) 3level nested geochemical anomalies occur around the large deposits, ie a geochemical province (>500 km2) containing regional anomalies (>100 km2) and local concentration centers (n×10 km2); that (3) normalized threshold values are more than 4.5 and concentration coefficient more than 2.0.

Key words: largesized Agpolymetallic deposit, geochemical indicators, prediction, Daxinganling Metallogenic Belt

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Regional geochemical indicators of largesized silver polymetallic deposits in Daxing anling Metallogenic Belt

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