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Understanding Stability and Cycling of Volatiles in the Mantle with High Pressure Experiments
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Understanding Stability and Cycling of Volatiles in the Mantle with High Pressure Experiments. |
| 개인저자 | Vennari, Cara Elizabeth. |
| 단체저자명 | University of California, Santa Cruz. Earth Science. |
| 발행사항 | [S.l.]: University of California, Santa Cruz., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 184 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-02B. Dissertation Abstract International |
| ISBN | 9781085590860 |
| 학위논문주기 | Thesis (Ph.D.)--University of California, Santa Cruz, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-02, Section: B.
Advisor: Williams, Quentin. |
| 이용제한사항 | This item must not be sold to any third party vendors.This item must not be added to any third party search indexes. |
| 요약 | Our understanding of the chemical and physical structure of the mantle is driven by connections between seismologic observations and experimental results. The mantle, which makes up the largest portion of the planet by volume, is heterogeneous, as suggested by seismic discontinuities. Sources of heterogeneity are largely from the surface of the Earth: both the basalt that forms subducted slabs and the volatiles within (and on) the slab provide chemical and thermal heterogeneity to the deep Earth. Four of the chapters in this dissertation concern volatile stability (carbon and nitrogen) and the last chapter is focused on the physical and chemical differences in slab strength and deformation.To understand the properties of materials in the deep Earth, we need to simulate high pressure conditions that occur at depth. The technique used to generate ultra-high pressures is a diamond anvil cell (where a sample is placed between two diamonds). These cells operate due to the relation of pressure = force/area, such that with a small area (from the tip of the diamonds) large pressures can be generated with relatively little force. Since the diamonds are optically transparent, we are able to probe spectroscopically with light (Raman and infrared spectroscopy) to detect changes in local bonding environments. Additionally, we are able to conduct X-ray diffraction in situ to measure density changes to the crystals and interatomic distances within the high pressure crystal structures. We can reliably generate pressures above transition zone pressures (25 GPa) all the way up to the core mantle boundary pressure (135 GPa).Nitrogen and carbon are ubiquitous on the surface of the Earth and are essential for life |
| 일반주제명 | Mineralogy. |
| 언어 | 영어 |
| 바로가기 | 
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