Statistic relationship between geochemical anomalous areas and gold reserves: a case study of Hebei Province

Abstract：Gold geochemical anomalies and their relationship with gold reserves are discussed in this paper based on statistic analysis of the data obtained from regional stream sediment geochemical survey in Hebei Province. Twenty-eight gold regional anomalies over an area of 50 km2 and 35 local anomalies with the area from 10 km2 to 50 km2 were delineated by threshold of Au value of 2.6ng/g. The relationship between regional anomalies and gold ore deposits is proved to be intimate. 100% large-size, 81.8% medium-size and 67.8% small-size gold ore deposits occur within regional anomalies. Correlation analysis shows that the correlation coefficient of gold anomalous areal size and gold ore reserves is 0.919, and the correlation coefficient of gold anomalous areal productivity and gold ore reserves is 0.924. Regression analysis shows that the correlation between areal size or areal productivity of gold anomalies and gold ore reserves is in linear form. The result is useful for prediction and evaluation of mineral resource potential.