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Petrology and contact relationships, SW portion PC Mullen Creek mafic complex, Medicine Bow Mts., Wy.

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dc.contributor.authorEdwards, Jeffrey Scott, author
dc.contributor.authorMcCallum, M. E. (Malcolm E.), 1934-, advisor
dc.contributor.authorBurns, L. K., committee member
dc.contributor.authorWarren, C. Gerry, committee member
dc.coverage.spatialMedicine Bow Mountains (Colo. and Wyo.)
dc.coverage.spatialColorado
dc.coverage.spatialWyoming
dc.date.accessioned2007-01-03T05:56:13Z
dc.date.available2007-01-03T05:56:13Z
dc.date.issued1983
dc.descriptionZip file contains supplementary plates 1 and 2.
dc.description.abstractGeologic mapping and thin section petrography of rock units in and adjacent to the southwestern portion of the Mullen Creek mafic complex reveals the presence of a roof zone of a Precambrian layered basic intrusion that invaded a metavolcanic sequence (predominantly hornblende gneiss). This portion of the mafic complex consists of variably metamorphosed interlayered rocks that originally ranged from pyroxenite to anorthosite but were dominantly gabbro and leucogabbro. Most of these rocks underwent regional medium-grade metamorphism to form amphibolite facies assemblages in which hornblende has replaced pyroxene, labradorite has remained stable and relict igneous textures are preserved. A later episode of retrogressive low-grade metamorphism has produced locally abundant fractures, veinlets and minerals typical of the greenschist facies such as chlorite, epidote, talc, serpentine and saussurite.
dc.format.mediummasters theses
dc.format.mediumZIP
dc.format.mediumPDF
dc.identifier1983_spring_Edwards_GEOS.pdf
dc.identifier1983_spring_Edwards_GEOS_suppl.pdf
dc.identifierETDF1983100001GEOS
dc.identifier.urihttp://hdl.handle.net/10217/88345
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991004697369703361
dc.relationQE445.W8.E38 1983
dc.relation.ispartof1980-1999
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectsouthern Wyoming
dc.subjectMedicine Bow Mountains
dc.subjectProspect Mountain granite
dc.subjectBig Creek shear zone
dc.subjectlayered mafic intrusion
dc.subjectMullen Creek-Nash Fork shear zone
dc.subjectMullen Creek mafic complex
dc.subjectnorthern Colorado
dc.subjecthornblende gneiss
dc.subjectPetrology -- Medicine Bow Mountains (Colo. and Wyo.)
dc.titlePetrology and contact relationships, SW portion PC Mullen Creek mafic complex, Medicine Bow Mts., Wy.
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineEarth Resources
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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