An extended local gap statistic for identifying geochemical anomalies

摘要: Abstract In this study, a hybrid of gap statistic and sliding window technique, termed local statistic, was presented to estimate the threshold associated significance. The method can not only detect anomalies in varied geochemical background, but also consider significance derived threshold, that anomalous classification some locations is rejected if computed probability larger than predefined one. A case study which processes dataset from soil samples obtained Inner Mongolia China carried out test method. results indicate (1) useful tool identify background; (2) serves further refine anomalies, provides an assessment uncertainty involved delineated anomalies.