Portland State University. Department of Geology
Michael L. Cummings
Date of Award
Master of Science (M.S.) in Geology
1 online resource (112 p.)
Hydrothermal deposits -- Oregon -- North Santiam Region, Geology -- Oregon -- North Santiam Region, Geochemistry -- Oregon -- North Santiam Region, Geology, Stratigraphic -- Oligocene
The Ruth Mine is a base-metal vein deposit near the eastern margin of a reported porphyry copper deposit in the Western Cascade Range in Oregon. Uplift of the Western Cascade Range has resulted in a deeply dissected terrain in which more than a kilometer of the stratigraphy overlying the porphyry-style mineralization is preserved and exposed. The stratigraphic units, which are middle Tertiary in age, have been given arbitrary letter designations beginning with the lowest unit (Unit A) through the uppermost unit (Unit D).
Pollock, J. Michael, "Geology and geochemistry of hydrothermal alteration, eastern portion of the North Santiam mining area" (1985). Dissertations and Theses. Paper 3582.