Knowledge Bank

A reduced number of data points is used to calculate positive residuals and trend surfaces for two variations of a system used by Professor Pride of the Department of Geology and Mineralogy at The Ohio State University to summarize geochemical data from the Bonanza caldera, Saguache County, Colorado. The intent was to test whether a reduced number of data stations might yield reliable information on the relation of copper concentrations to the geology of the Bonanza area. Two areas of mineralization and associated hydrothermal alteration probably related to the emplacement of ring-type intrusives have been identified along the northeastern and southeastern margins of the Bonanza caldera. It appears that anomalous copper concentrations may be related to mineralization within the caldera.