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Filtering by: Subject Dikes (Geology) -- Oregon -- Wallowa Mountains

Partial melting of tonalite at the margins of a Columbia River Basalt Group dike, Wallowa Mountains, northeastern Oregon

Creator:

Petcovic, Heather L.

Abstract:

Columbia River Basalt Group dikes cut the tonalite-granodiorite Wallowa Batholith in northeastern Oregon, providing a natural setting in which to examine partial melting. Many dikes have up to 5 m-wide zones of quenched partially melted wallrock at their margins. This paper examines the progressive partial melting reactions in biotite-and hornblende-bearing...

Resource Type:

Masters Thesis

Full Text:

Margins of a Columbia River Basalt Group Dike, Wallowa Mountains, Northeastern Oregon. Abstract approved
Geology of part of the southeastern Wallowa Mountains, northeastern Oregon

Creator:

Wetherell, Clyde Elbert

Abstract:

Within 40 square miles of the southeastern Wallowa Mountains, Oregon, eugeosynclinal Permian and Triassic formations comprising a section about 25,000 feet thick have been exposed by uplift and erosion of overlying Miocene Columbia River basalt. Deposition appears to have been continuous from Permian into Upper Triassic, but an apparent angular...

Resource Type:

Masters Thesis