Geologic map of Lake Valley manganese district, Sierra County, New Mexico
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Abstract
The Lake Valley district was originally developed as a manganese-silver district, but the known silver-bearing ore bodies have long since been worked out. The critical shortage of manganese during World War II renewed interest in the manganese deposits; from October 1941 through June 1942 the U. S. Geological Survey and the U.S. Bureau of Mines conducted a cooperative exploration program in the district. This exploration demonstrated that the Lake Valley district contained about 175,000 tons of ore; approximately 37,000 tons has subsequently been mined. The present reserves are estimated to be approximately 140,000 tones of ore with a manganese content of more than 10 percent and an average content of 16.4 percent; about 75,000 tons of the ore has manganese content of more than 15 percent and an average content of 20.7 percent.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Geologic map of Lake Valley manganese district, Sierra County, New Mexico |
| Series title | Miscellaneous Field Studies Map |
| Series number | 9 |
| DOI | 10.3133/mf9 |
| Year Published | 1953 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | 45.65 x 30.73 inches |
| Country | United States |
| State | New Mexico |
| County | Sierra County |
| Scale | 2400 |
| Google Analytic Metrics | Metrics page |