التفاصيل البيبلوغرافية
| العنوان: |
Hydrogen Contents of the Lithospheric Mantle Beneath the Canadian Cordillera and Slave Craton |
| المؤلفون: |
Kilgore, McKensie L. 1990- |
| المساهمون: |
Brandon, Alan D., Peslier, Anne H., Copeland, Peter, Fu, Qi, Cooper, Catherine M. |
| سنة النشر: |
2019 |
| المجموعة: |
University of Houston Institutional Repository (UHIR) |
| مصطلحات موضوعية: |
Hydrogen, Water, Mantle, Lithosphere, Craton, Subduction, Mantle wedge, Melting, Metasomatism, Craton stability, Oxygen fugacity, Oxidation |
| الوصف: |
Trace levels of hydrogen in mantle minerals can significantly influence the physical properties of the mantle, and identifying the processes that affect hydrogen incorporation in the main minerals of the lithospheric mantle is vital to our understanding of geodynamics. In particular, results from this dissertation are used to investigate the role of hydrogen in the longevity of ancient cratonic lithosphere and how melting, metasomatism and oxygen fugacity conditions affect hydrogen in the lithosphere. This is accomplished by measuring hydrogen contents, as well as major and trace elements contents of peridotite minerals from mantle xenoliths derived from the lithosphere beneath Alligator Lake in the northern Canadian Cordillera and three locales from the Slave craton. The Alligator Lake lithosphere has a heterogeneous composition resulting from modification by fluids derived from a subducting slab, followed by melting and metasomatism by carbonatite-like melts initiated by the opening of a slab window. Not only is subduction lithosphere not more hydrous than lithosphere in other tectonic settings, but it is also highly heterogeneous in hydrogen content locally. Moreover, in Alligator Lake, oxidation is not correlated to subduction metasomatism. The Slave cratonic lithosphere is chemically stratified vertically, and the hydrogen contents of its peridotite minerals replicate this stratification. Xenoliths from the Slave lithosphere provide evidence of localized metasomatism unique to each region (Jericho in the north, Lac de Gras in the center and Gahcho Kue in the southeast) and each chemical stratum at depth. These metasomatic processes resulted in addition and/or removal of hydrogen in the lithosphere, including by silicate melts, hydrous fluids, kimberlite-like melts and carbonatite-like melts. High hydrogen contents in olivine near the base of cratonic lithosphere resulting from metasomatism by H-bearing melts and fluids, as observed beneath the Slave craton, do not necessarily result in cratonic root ... |
| نوع الوثيقة: |
thesis |
| وصف الملف: |
application/pdf; born digital |
| اللغة: |
English |
| العلاقة: |
Portions of this document appear in: Kilgore, McKensie L., Anne H. Peslier, Alan D. Brandon, and William M. Lamb. "Water and Oxygen Fugacity in the Lithospheric Mantle Wedge beneath the Northern Canadian Cordillera (Alligator Lake)." Geochemistry, Geophysics, Geosystems 19, no. 10 (2018): 3844-3869.; https://hdl.handle.net/10657/5609Test |
| الإتاحة: |
https://hdl.handle.net/10657/5609Test |
| حقوق: |
The author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s). |
| رقم الانضمام: |
edsbas.1F51722A |
| قاعدة البيانات: |
BASE |
