By A. H. KOSCHMANN and M. H. BERGENDAHL - USGS 1968
Click here for the Principle Gold Producing Districts of the United States Index
The most complete published account of the geology and ore deposits of Del Norte County is that of O'Brien (1952b, p. 266-267, 277-279).
The total gold production from 1880 through 1959 was about 44,700 ounces; about 40,000 ounces was from early placer operations along the Smith River and its tributaries. In the eastern part of the county, quartz veins and stringers containing gold, pyrite, and arsenopyrite occur in greenstone and slate near the contact with diorite and granodiorite. An undisclosed amount of gold has been recovered from copper ore in the Low Divide district in the northwestern part of the county.
