RI 4713 Investigation Of Black Diablo, Black Eagle, And Black Rock Manganese Deposits, Pershing And Lander Counties, Nev.

In November 1940, the Bureau of Mines started exploration of the Three Blacks manganese properties - Black Diablo. in Pershing County and Black Eagle and Black .Rook in Lander County. The purpose was to determine possible reserves of manganese in the deposits. It is reported that a small amount of manganese was mined from the Black Diablo during World. War 1. No mining except that necessary for assessment work had been done on the Black Eagle. Shipments were being made from the Black Rock deposit to a concentrator at Vain, Nev., while the Bureau's development work was progressing. The Black Diablo deposit consists of one patented claim owned by the Charleston. Hill National Manes Co. Mary L. Clough of Winnemicca, Nev., president. The deposit is about 20 miles by a gravel and dirt road southwest of Golconda, a town on U. S. Highway 40 and the Southern Pacific Railway, Pershing County, Nev. The deposit lies at an elevation of about 5,600 feet on the east flank of the north-south trending Sonoma Range. The property was leased by Messrs. Hollis Chatwin, T. E. Chatwin, and R. H. Richards of Salt Lake City and Mammoth, Utah. The lessees installed a crusher and erected an ore bin below the open cut on the deposit and mined and, shipped about 5,000 tons of about 30 to 52 percent manganese ore to the Columbia Steel Co., Provo, Utah.