First Advisor

Michael L. Cummings

Date of Publication

1988

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Geology

Department

Geology

Subjects

Metasomatism (Mineralogy), Metamorphism (Geology) -- Montana -- Tobacco Root Mountains, Amphibolite -- Montana -- Tobacco Root Mountains, Ultrabasic rocks -- Montana -- Tobacco Root Mountains, Geology -- Montana -- Tobacco Root Mountains

DOI

10.15760/etd.5788

Physical Description

1 online resource (155 p.)

Abstract

The purpose of this study is to characterize the metasomatism that has taken place as a result of the chemical incompatibility between mafic and metaultramafic bulk compositions during high-grade regional metamorphism in the Tobacco Root Mountains, southwest Montana. Metasomatism of these rocks took place by both diffusionand infiltration-dominated processes. The result of these processes are characterized mineralogically and geochemically in the rocks.

Comments

If you are the rightful copyright holder of this dissertation or thesis and wish to have it removed from the Open Access Collection, please submit a request to pdxscholar@pdx.edu and include clear identification of the work, preferably with URL

This thesis includes supplemental content.

Persistent Identifier

http://archives.pdx.edu/ds/psu/21799

m38-1.JPG (2268 kB)
Plate 1. Geologic map of the Branham Lakes Cirque, Tobacco Root Mountains, Southwest Montanta

m38-2.JPG (2563 kB)
Plate 2. Plane-table map of a portion of the study area

m38-3.JPG (2364 kB)
Plate 3. Geochemical sample location map

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