dc.contributor.advisor | Stockli, Daniel F | |
dc.contributor.author | Wolfe, Melissa Renee | |
dc.date.accessioned | 2009-10-13T03:03:24Z | |
dc.date.available | 2009-10-13T03:03:24Z | |
dc.date.issued | 2009-05-12 | |
dc.date.submitted | 2009 | |
dc.identifier.other | http://dissertations.umi.com/ku:10387 | |
dc.identifier.uri | http://hdl.handle.net/1808/5515 | |
dc.description.abstract | This 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.extent | 196 pages | |
dc.language.iso | EN | |
dc.publisher | University of Kansas | |
dc.rights | This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author. | |
dc.subject | Geology | |
dc.subject | (u-th)/he thermochronometry | |
dc.subject | Bohemian massif | |
dc.subject | Empirical calibration | |
dc.subject | KTB drill hole | |
dc.subject | Rutile | |
dc.subject | Zircon | |
dc.title | Calibration of Rutile (U-Th)/He Thermochronology: assessing the thermal evolution of the KTB drill hole, Germany and adjacent Bohemian Massif | |
dc.type | Thesis | |
dc.contributor.cmtemember | Walker, J. Douglas | |
dc.contributor.cmtemember | Fowle, David A. | |
dc.contributor.cmtemember | Macpherson, Gwendolyn L. | |
dc.thesis.degreeDiscipline | Geology | |
dc.thesis.degreeLevel | M.S. | |
kusw.oastatus | na | |
kusw.oapolicy | This item does not meet KU Open Access policy criteria. | |
kusw.bibid | 7079034 | |
dc.rights.accessrights | openAccess | |