MINERAL DEPOSITS IN THE SIERRA NEVADA OF CALIFORNIA

Federal & State Resources / US Geological Survey (USGS)

Date posted: 03/24/13

This publication consists of maps and text describing possible undiscovered and known ore deposits, mineral-development issues, public health and safety issues such as asbestos, mercury, and open-pit mines, the role of calcium, as well as the hazards posed by volcanoes and earthquakes in the Sierra Nevada ecosystem. Maps of likely undiscovered and known deposits of gold, copper, sulfide, and others show the present distribution of such ores and are useful in metal-supply issues, water quality studies, and planning for avoiding environmental hazards. Information on exploration shows potential for development and is important to rural communities, the general economy, employment, and mineral supply. Mercury has important effects on plant communities and water systems in the Sierra Nevada ecosystem, with possible consequences for humans. Asbestos occurs naturally in the study area, though its health risk for humans is controversial. Calcium from carbonate rocks is essential for metabolic processes of aquatic life and in the buffering system of waters in the area. Volcanic activity and earthquakes have played a major role in shaping the environment of the study area.