Western Molybdenum Company mine, Chewelah district, Stevens County, Washington
Open-File Report
50-20
By: John Roberts Cooper
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Abstract
The Western Molybdenum Company mine was opened many years ago to obtain copper. The only production was several cars of crude copper ore shipped during World War I. An unsuccessful attempt to produce molybdenum was made in 1939-1941.
The deposit consists of steeply dipping, northeast-striking veins in monzonite and marble, carrying molybdenite, pyrite, chalcopyrite, scheelite, and some quartz. Northwest- striking faults cut and offset the veins as much as 10 feet. The main vein, which contains all the known ore, is developed by four levels to a depth of 293 feet. It contains ore shoots from a few inches to 4 feet wide and up to 130 feet long, carrying about 1 percent MoS2, 1 percent Cu, and 0.15 percent W03.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Western Molybdenum Company mine, Chewelah district, Stevens County, Washington |
| Series title | Open-File Report |
| Series number | 50-20 |
| DOI | 10.3133/ofr5020 |
| Edition | Superceded by: WA Div. of Mines and Geology, Report RI-18, 1954 |
| Year Published | 1950 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | Report: 13 p.; 7 Plates: 28.96 x 10.94 inches or smaller |
| Country | United States |
| State | Washington |
| County | Stevens County |
| Other Geospatial | Chewelah district |
| Google Analytic Metrics | Metrics page |