RI 4124 Blue Ledge Copper-Zinc Mine, Siskiyou Co., Calif.

"INTRODUCTION Preliminary examination of the Blue Ledge mine was made by O. H. Metzger, a Bureau of Mines engineer, in May 1943. A result of his recommendations; a Bureau of Mines sampling and exploration project was begun by J. R. Reynolds in October 1943 and continued to December when it was recessed for the winter. The project was resumed by the auther in May 1944 and was completed in November 1944. The Federal Geological Survey 3/ assisted by mapping the geology of the mine and logging the diamond-drill cores obtained from the Bureau's exploration Company maps, diamond-drill-hole records, several reports, and other data on the property were made available to the Bureau by D. C. Brown, of Towne Securities Corporation, owner of the Blue Ledge group of claims. E. A. White, general manager of the Tacoma Smelter of the American Smelting & Refining Co., supplied statistics for all ore that has been purchased from the Blue Ledge mine by his company."