Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN
This study investigates the geochemistry and habitability of spring fluids associated with active continental serpentinization at The Cedars, California, USA and the Tablelands, Newfoundland, CAN. These ophiolite complexes were host to several springs discharging ultra-basic (>11) and highly redu...
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Memorial University of Newfoundland
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ftmemorialuniv:oai:research.library.mun.ca:8354 2023-10-01T03:57:33+02:00 Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN Rietze, Amanda 2015-05 application/pdf https://research.library.mun.ca/8354/ https://research.library.mun.ca/8354/1/thesis.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/8354/1/thesis.pdf Rietze, Amanda <https://research.library.mun.ca/view/creator_az/Rietze=3AAmanda=3A=3A.html> (2015) Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 2015 ftmemorialuniv 2023-09-03T06:46:51Z This study investigates the geochemistry and habitability of spring fluids associated with active continental serpentinization at The Cedars, California, USA and the Tablelands, Newfoundland, CAN. These ophiolite complexes were host to several springs discharging ultra-basic (>11) and highly reducing (<-400 mV) fluids rich in H2 gas that were geochemically distinct from the surrounding groundwater. C2+ hydrocarbons at both ophiolite complexes suggest hydrocarbons were thermogenic in origin; however, an abiogenic contribution could not be ruled out. Methane at The Cedars was dominated by a microbial origin with a contribution of non-microbial sources, while methane at the Tablelands was dominated by a non-microbial source (i.e. thermogenic or abiogenic or mixture of the two). Spring fluids lacked electron acceptors and nutrients which adds further complications to the already unusually high pH and limited carbon fixation possibilities in this extreme environment. Thesis Newfoundland Memorial University of Newfoundland: Research Repository |
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Memorial University of Newfoundland: Research Repository |
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ftmemorialuniv |
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English |
description |
This study investigates the geochemistry and habitability of spring fluids associated with active continental serpentinization at The Cedars, California, USA and the Tablelands, Newfoundland, CAN. These ophiolite complexes were host to several springs discharging ultra-basic (>11) and highly reducing (<-400 mV) fluids rich in H2 gas that were geochemically distinct from the surrounding groundwater. C2+ hydrocarbons at both ophiolite complexes suggest hydrocarbons were thermogenic in origin; however, an abiogenic contribution could not be ruled out. Methane at The Cedars was dominated by a microbial origin with a contribution of non-microbial sources, while methane at the Tablelands was dominated by a non-microbial source (i.e. thermogenic or abiogenic or mixture of the two). Spring fluids lacked electron acceptors and nutrients which adds further complications to the already unusually high pH and limited carbon fixation possibilities in this extreme environment. |
format |
Thesis |
author |
Rietze, Amanda |
spellingShingle |
Rietze, Amanda Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN |
author_facet |
Rietze, Amanda |
author_sort |
Rietze, Amanda |
title |
Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN |
title_short |
Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN |
title_full |
Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN |
title_fullStr |
Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN |
title_full_unstemmed |
Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN |
title_sort |
investigating geochemistry and habitability of continental sites of serpentinization: the cedars, california, usa and the tablelands, newfoundland, can |
publisher |
Memorial University of Newfoundland |
publishDate |
2015 |
url |
https://research.library.mun.ca/8354/ https://research.library.mun.ca/8354/1/thesis.pdf |
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Newfoundland |
genre_facet |
Newfoundland |
op_relation |
https://research.library.mun.ca/8354/1/thesis.pdf Rietze, Amanda <https://research.library.mun.ca/view/creator_az/Rietze=3AAmanda=3A=3A.html> (2015) Investigating geochemistry and habitability of continental sites of serpentinization: the Cedars, California, USA and the Tablelands, Newfoundland, CAN. Masters thesis, Memorial University of Newfoundland. |
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_version_ |
1778529038744158208 |