Investigation on the generation of primitive basalts in the southern Washington Cascades

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dc.contributor.advisorLeeman, William P.en_US
dc.creatorLewis, Jared Fairhursten_US
dc.date.accessioned2009-06-04T06:27:56Zen_US
dc.date.available2009-06-04T06:27:56Zen_US
dc.date.issued2004en_US
dc.description.abstractAn 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.en_US
dc.format.extent127 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS GEOL. 2004 LEWISen_US
dc.identifier.citationLewis, Jared Fairhurst. "Investigation on the generation of primitive basalts in the southern Washington Cascades." (2004) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17700">https://hdl.handle.net/1911/17700</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/17700en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectGeologyen_US
dc.subjectMineralogyen_US
dc.subjectGeochemistryen_US
dc.titleInvestigation on the generation of primitive basalts in the southern Washington Cascadesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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