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dc.contributor.advisorStockli, Daniel F
dc.contributor.authorWolfe, Melissa Renee
dc.date.accessioned2009-10-13T03:03:24Z
dc.date.available2009-10-13T03:03:24Z
dc.date.issued2009-05-12
dc.date.submitted2009
dc.identifier.otherhttp://dissertations.umi.com/ku:10387
dc.identifier.urihttp://hdl.handle.net/1808/5515
dc.description.abstractThis study empirically calibrates zircon and rutile (U-Th)/He dating by evaluating the experimentally-derived He diffusion kinetics and their extrapolation over geological time by (U-Th)/He dating a suite of borehole samples with a welldefined thermal history. Age dating is coupled with cycled step-heating diffusion experiments and thermal modeling of zircon and rutile. The German Continental Deep Drilling Project (KTB) is ideally suited for this approach given its depth and zircon- and rutile-bearing metamorphic rocks. Results from zircon (U-Th)/He analyses display a helium partial retention zone between ~140-210°C which agrees well with laboratory-derived He diffusion kinetics. While regional rutile (U-Th)/He age data confirm the feasibility of rutile (U-Th)/He thermochronometry (Tc ≈ 220°C) in eclogites and granulites, anomalous rutile (U-Th)/He ages from the KTB drill hole illustrate the implications of retrograde rutile breakdown to titanite and the importance of petrographic characterization of rutile for obtaining reliable and meaningful thermochronometric data.
dc.format.extent196 pages
dc.language.isoEN
dc.publisherUniversity of Kansas
dc.rightsThis item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
dc.subjectGeology
dc.subject(u-th)/he thermochronometry
dc.subjectBohemian massif
dc.subjectEmpirical calibration
dc.subjectKTB drill hole
dc.subjectRutile
dc.subjectZircon
dc.titleCalibration of Rutile (U-Th)/He Thermochronology: assessing the thermal evolution of the KTB drill hole, Germany and adjacent Bohemian Massif
dc.typeThesis
dc.contributor.cmtememberWalker, J. Douglas
dc.contributor.cmtememberFowle, David A.
dc.contributor.cmtememberMacpherson, Gwendolyn L.
dc.thesis.degreeDisciplineGeology
dc.thesis.degreeLevelM.S.
kusw.oastatusna
kusw.oapolicyThis item does not meet KU Open Access policy criteria.
kusw.bibid7079034
dc.rights.accessrightsopenAccess


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