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dc.contributor.advisor Leeman, William P.
dc.creatorLewis, Jared Fairhurst
dc.date.accessioned 2009-06-04T06:27:56Z
dc.date.available 2009-06-04T06:27:56Z
dc.date.issued 2004
dc.identifier.urihttps://hdl.handle.net/1911/17700
dc.description.abstract An investigation of the petrography, mineralogy and chemistry of primitive basalts found in a E-W transect of southern Washington and northern Oregon provides constraints concerning the thermal structure and composition of the mantle wedge beneath the Cascadia subduction zone. The Cascades represents a warm, slowly subducting end-member of subduction zone types. Chemical and petrographical characteristics of basalts from a transect across southern Washington representing at least six variants of primitive melts can be recognized. Estimates of magma temperature and depth based on mineral and whole-rock chemistry provide estimations on the Cascadia subduction zone's thermal structure. Mineral chemistry and whole-rock trace element chemistry are further used to interpret the mantle chemistry and the processes involved in producing subduction zone basalts. The results can be explained by multiple sources found within the subduction zone mantle, melting at various depths and temperatures.
dc.format.extent 127 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectGeology
Mineralogy
Geochemistry
dc.title Investigation on the generation of primitive basalts in the southern Washington Cascades
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Earth Science
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Arts
dc.identifier.citation Lewis, Jared Fairhurst. "Investigation on the generation of primitive basalts in the southern Washington Cascades." (2004) Master’s Thesis, Rice University. https://hdl.handle.net/1911/17700.


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