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An Investigation Of Fluid Inclusions And Geochemistry Of Ore Formation In The Cedar Creek Breccia Pipe, North Santiam Mining District, Oregon, Mark B. Winters
An Investigation Of Fluid Inclusions And Geochemistry Of Ore Formation In The Cedar Creek Breccia Pipe, North Santiam Mining District, Oregon, Mark B. Winters
WWU Graduate School Collection
The Cedar Creek breccia pipe is located in the North Santiam Mining District, Oregon, approximately 50 km. east of Salem. It was emplaced in the Sardine Formation, a series of andesitic flows, breccias, tuffs, and small intrusives of Middle to Late Miocene age.
The breccia pipe was discovered by Amoco Minerals Co. through soil sampling, a ground magnetic survey, and drilling. It is elliptical in plan view with maximum axes of approximately 110 and 145 m. and extends vertically downward over 350 m. The contacts between the pipe and the surrounding country rock are sharp and characterized by sheeted fault …