I. Control of Ore by Primary Igneous Structures: Porcher Island, British Columbia. II. Structural Petrology: Crestmore, California. III. The Geochemistry and Paragenesis of the Ores of the Cactus Mine, Kern County, California
<p>Part I: Mapping internal structures of an intrusive has proven of value in quarrying but only about a dozen examples appear in the literature wherein metalliferous deposits in intrusives were found to occupy features such as cross joints or marginal upthrusts e.g. (Emmons and Grout 1935),...