Taylor, Benjamin (2023) Carbon sequestration in ultramafic rocks from The Tablelands and White Hills, Newfoundland, Canada. Masters thesis, Memorial University of Newfoundland.
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Abstract
With the rising concentration of atmospheric CO₂ and a better understanding of its effect on global climate, there is increasing interest in developing methods of removing CO₂ from the atmosphere and its long-term storage. CO₂ mineralization is a naturally occurring process within igneous and ultramafic rocks that converts gaseous CO₂ into carbonate minerals. While a promising method, the many factors that affect CO₂ mineralization are not fully understood and require further investigation. This study focused on two ultramafic ophiolites located in Newfoundland, the Tablelands and the White Hills. In this study, field-based CO₂ sequestration experiments were conducted along with laboratory-based CO₂ sequestration experiments using rock samples from the two ophiolites. The field-based experiments recorded the CO₂ sequestration rates of naturally occurring ultra-basic springs with a pH of 11-12. The laboratory experiments varied parameters such as water chemistry, surface area, CO₂ supply, and sampling locations. This study found that the higher pH waters sequestered the most CO₂ and also had the greatest amount of carbonate mineral precipitation. Additionally, it was found that increasing CO₂ supply increased the amount of precipitated carbonate minerals in almost all experiments.
| Item Type: | Thesis (Masters) |
|---|---|
| URI: | http://research.library.mun.ca/id/eprint/15997 |
| Item ID: | 15997 |
| Additional Information: | Includes bibliographical references (pages 118-120) -- Restricted until May 4, 2024 |
| Keywords: | carbon dioxide, ultramafic, sequestration, geology, Tablelands, White Hills |
| Department(s): | Science, Faculty of > Earth Sciences |
| Date: | May 2023 |
| Date Type: | Submission |
| Digital Object Identifier (DOI): | https://doi.org/10.48336/FSBX-0872 |
| Library of Congress Subject Heading: | Geological carbon sequestration--Newfoundland and Labrador--Gros Morne National Park; Ultrabasic rocks--Newfoundland and Labrador--Gros Morne National Park; Geological carbon sequestration--Newfoundland and Labrador--White Hills; Ultrabasic rocks-- Newfoundland and Labrador--White Hills |
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