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The geology and mineralogy of the W. Wilson mine near Clancey, Jefferson County, Montana

Trace Elements Investigations 256
Prepared in cooperation with the U.S. commission on Atomic Energy
By:
https://doi.org/10.3133/tei256

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Abstract

The W. Wilson mine, near Clancey, Mont., explores a siliceous vein in quartz monzonite of the Boulder batholith. The vein is a composite structure that consists of several closely spaced veinlets of quartz and chalcedony separated by silicified quartz monzonite. The vein has been recurrently brecciated and silicified. Typically, the quartz monzonite has been hydrothermally altered in zones of decreasing intensity outward from the vein. Pitchblende was deposited in and along the vein during one stage of the silicification that is characterized by fine-grained disseminated pyrite in black chalcedony. Subsequently most of the pitchblende was oxidized and hydrated to form a series of brightly colored secondary uranium minerals that exhibit a zonal relationship. Most of the known uranium minerals are localized in two small elongate ore bodies.

Suggested Citation

Meschter, D., 1953, The geology and mineralogy of the W. Wilson mine near Clancey, Jefferson County, Montana: U.S. Geological Survey Trace Elements Investigations 256, Report: 35 p.; Plate 2: 14.23 inches x 10.39 inches; Plate 3: 28.49 inches x 26.73 inches, https://doi.org/10.3133/tei256.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title The geology and mineralogy of the W. Wilson mine near Clancey, Jefferson County, Montana
Series title Trace Elements Investigations
Series number 256
DOI 10.3133/tei256
Year Published 1953
Language English
Publisher U.S. Government Printing Office
Publisher location Washington D.C.
Description Report: 35 p.; Plate 2: 14.23 inches x 10.39 inches; Plate 3: 28.49 inches x 26.73 inches
Country United States
State Montana
Additional Online Files (Y/N) Y
Additional publication details