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Articles 1 - 21 of 21
Full-Text Articles in Entire DC Network
Hydrogen, Single-Carbon Compounds, And Thermal Regime In The Oceanic Ultramafic-Dominated Lithosphere: Insights From A Deep Borehole On The Atlantis Massif, Susan Q. Lang, C. Geoffrey Wheat, Kristin L. Dickerson, Mark K. Reagan, Ivan P. Savov, Jordyn A. Robare, William J. Brazelton, Johanna Suhonen, Oscar Cavazos, Andrew Mccaig, Peter Blum, Natsue Abe, Rémi Coltat, Jeremy R. Deans, Marguerite Godard, Barbara E. John, Frieder Klein, Rebecca Kuehn, Kuan Yu Lin, C. Johan Lissenberg, Haiyang Liu, Ethan L. Lopes, Toshio Nozaka, William Osborne, Andrew J. Parsons, Vamdev Pathak, Jessica Rodgers, Jeffrey S. Seewald, Kenneth W. Sims, Gordon Southam
Hydrogen, Single-Carbon Compounds, And Thermal Regime In The Oceanic Ultramafic-Dominated Lithosphere: Insights From A Deep Borehole On The Atlantis Massif, Susan Q. Lang, C. Geoffrey Wheat, Kristin L. Dickerson, Mark K. Reagan, Ivan P. Savov, Jordyn A. Robare, William J. Brazelton, Johanna Suhonen, Oscar Cavazos, Andrew Mccaig, Peter Blum, Natsue Abe, Rémi Coltat, Jeremy R. Deans, Marguerite Godard, Barbara E. John, Frieder Klein, Rebecca Kuehn, Kuan Yu Lin, C. Johan Lissenberg, Haiyang Liu, Ethan L. Lopes, Toshio Nozaka, William Osborne, Andrew J. Parsons, Vamdev Pathak, Jessica Rodgers, Jeffrey S. Seewald, Kenneth W. Sims, Gordon Southam
School of Geography, Earth and Environmental Sciences
Water that flows through permeable ultramafic rocks produces high abundances of molecular hydrogen (H2), methane (CH4), and other small organic molecules. Such products can fuel life in the rocky subseafloor, be extracted for energy, and may have played a role in pre-biological chemical synthesis on early Earth or other planetary bodies. The International Ocean Discovery Program drilled a new 1268-m-deep borehole (U1601C) into serpentinized mantle with minor gabbroic rocks on the Atlantis Massif, ∼800-m north of the Lost City hydrothermal field (30°N, Mid-Atlantic Ridge). Measured temperatures of the disturbed borehole reached 91.3 °C, and equilibrated temperatures …
Techno-Economic Analysis For Floating Offshore Wind And Offshore Green Hydrogen, David Pegler, Deborah Greaves, Robert Rawlinson-Smith, Simone Michele, Daniel Conley, James Benhin
Techno-Economic Analysis For Floating Offshore Wind And Offshore Green Hydrogen, David Pegler, Deborah Greaves, Robert Rawlinson-Smith, Simone Michele, Daniel Conley, James Benhin
School of Engineering, Computing and Mathematics
This paper describes a techno-economic model for exploiting the Celtic Sea wind resource through direct productionof hydrogen offshore. The model conceives a modular approach with eight 510 MW floating windfarms,each with an electrolyser system and export compressor mounted on a jacket. The model ensures an uninterruptedhydrogen supply to an industrial cluster (16.4 te.H2/h) by incorporating salt cavern hydrogen storage.During periods of no power generation, baseload power is provided from hydrogen fuel cells. The base-casemodel with a Discount Rate of 6% returned an Levelised Cost of Hydrogen (LCoH) of £7.25 per kg of hydrogen in2023. The LCoH shows strong sensitivity to …
Climate Adaptation For A Natural Atoll Island In The Maldives - Predicting The Long-Term Morphological Response Of Coral Islands To Sea Level Rise And The Effect Of Hazard Mitigation Strategies, F. E. Roelvink, G. Masselink, C. Stokes, R. T. Mccall
Climate Adaptation For A Natural Atoll Island In The Maldives - Predicting The Long-Term Morphological Response Of Coral Islands To Sea Level Rise And The Effect Of Hazard Mitigation Strategies, F. E. Roelvink, G. Masselink, C. Stokes, R. T. Mccall
School of Biological and Marine Sciences
Coral atoll islands, common in (sub)tropical oceans, consist of low-lying accumulations of carbonate sediment produced by fringing coral reef systems and are of great socio-economic and ecological importance. Previous studies have predicted that many atoll islands will become uninhabitable before the end of this century due to sea level rise exacerbating wave-driven flooding. However, the assumption that such islands are morphologically static has been challenged by observations and modeling that show the potential for overwashing and sediment deposition to maintain island freeboard. Reliable long-term predictions of island change and future flood risk, essential for adaptation planning, are, however, lacking. Here, …
Structural And Geomorphological Constraints On The Activity Of The Sparta Fault (Greece), Çal Çağatay, Sarah Boulton, Zoe Mildon
Structural And Geomorphological Constraints On The Activity Of The Sparta Fault (Greece), Çal Çağatay, Sarah Boulton, Zoe Mildon
School of Geography, Earth and Environmental Sciences
The ancient city of Sparti (Greece) suffered extensive damage from an estimated Mw 7.2 earthquake in 464 BCE, resulting in c. 20 000 fatalities, but questions remain about the short-(c. 104 years) and long-term (105–106 years) activity of this important structure. This paper presents new structural data and fluvial geomorphological analysis from the Sparta Fault and, in particular, considers the less well-known northern fault segment. A new topographic profile on the well-developed post-glacial fault scarp from the northern strand indicates a 7.53 m offset over the last c. 15 ka, suggesting a throw-rate of c. …
Three Horizons For Future Geoscience, S Iain, Angela C Maria, M Hassina, M Kombada, R Munira, M Raji
Three Horizons For Future Geoscience, S Iain, Angela C Maria, M Hassina, M Kombada, R Munira, M Raji
More Faculty of Science and Engineering Research
Geoscience, along with other scientific disciplines, is being increasingly challenged on how it can best confront key global challenges, such as climate change, food insecurity, biodiversity loss, human conflict and migration, and persistent poverty. But its traditional association with exploitation of the planet’s natural resources for energy and materials links it with contemporary concerns around unsustainable human practices, arguably fueling a growing disenchantment that is most evident in declining enrollment in university geoscience courses in many countries. Therefore, a fresh re-framing of the geoscience’s relationship to society would seem to be urgently needed. In response to this need, we introduce …
Paleoseismological Findings At A New Trench Indicate The 1714 M8.1 Earthquake Ruptured The Main Frontal Thrust Over All The Bhutan Himalaya, Yuqiu Zhao, Djordje Grujic, Santanu Baruah, Dawchu Drukpa, Joanne Elkadi, György Hetényi, Georgina E. King, Zoë K. Mildon, Nityam Nepal, Caroline Welte
Paleoseismological Findings At A New Trench Indicate The 1714 M8.1 Earthquake Ruptured The Main Frontal Thrust Over All The Bhutan Himalaya, Yuqiu Zhao, Djordje Grujic, Santanu Baruah, Dawchu Drukpa, Joanne Elkadi, György Hetényi, Georgina E. King, Zoë K. Mildon, Nityam Nepal, Caroline Welte
School of Geography, Earth and Environmental Sciences
The 1714 Bhutan earthquake was one of the largest in the Himalaya in the last millennium. We show that the surface rupture caused by this earthquake extended further to the east than previously known, it was at least 175 km long, with slip exceeding 11 m at our study site. The age of the surface rupture was constrained by a combination of radiocarbon and traditional optically stimulated luminescence dating of affected river sediments. Computations using empirical scaling relationships, fitting historical observations and paleoseismic data, yielded a plausible magnitude of Mw 8.1 ± 0.4 and placed the hypocentre of the 1714 …
Hydrothermal Alteration Of The Ocean Crust And Patterns In Mineralization With Depth As Measured By Micro‐Imaging Infrared Spectroscopy, Rebecca N. Greenberger, Michelle Harris, Bethany L. Ehlmann, Molly A. Crotteau, Peter B. Kelemen, Craig E. Manning, Damon A.H. Teagle
Hydrothermal Alteration Of The Ocean Crust And Patterns In Mineralization With Depth As Measured By Micro‐Imaging Infrared Spectroscopy, Rebecca N. Greenberger, Michelle Harris, Bethany L. Ehlmann, Molly A. Crotteau, Peter B. Kelemen, Craig E. Manning, Damon A.H. Teagle
School of Geography, Earth and Environmental Sciences
Processes for formation, cooling, and altering Earth's ocean crust are not yet completely understood due to challenges in access and sampling. Here, we use contiguous micro-imaging infrared spectroscopy to develop complete-core maps of mineral occurrence and investigate spatial patterns in the hydrothermal alteration of 1.2 km of oceanic crust recovered from Oman Drilling Project Holes GT1A, GT2A, and GT3A drilled in the Samail Ophiolite, Oman. The imaging spectrometer shortwave infrared sensor measured reflectance of light at wavelengths 1.0–2.6 μm at 250–260 μm/pixel, resulting in >1 billion independent measurements. We map distributions of nine key primary and secondary minerals/mineral groups—clinopyroxene, amphibole, …
Earthquake Nucleation In The Lower Crust By Local Stress Amplification, Lr Campbell, L Menegon, Å Fagereng, G Pennacchioni
Earthquake Nucleation In The Lower Crust By Local Stress Amplification, Lr Campbell, L Menegon, Å Fagereng, G Pennacchioni
School of Geography, Earth and Environmental Sciences
AbstractDeep intracontinental earthquakes are poorly understood, despite their potential to cause significant destruction. Although lower crustal strength is currently a topic of debate, dry lower continental crust may be strong under high-grade conditions. Such strength could enable earthquake slip at high differential stress within a predominantly viscous regime, but requires further documentation in nature. Here, we analyse geological observations of seismic structures in exhumed lower crustal rocks. A granulite facies shear zone network dissects an anorthosite intrusion in Lofoten, northern Norway, and separates relatively undeformed, microcracked blocks of anorthosite. In these blocks, pristine pseudotachylytes decorate fault sets that link adjacent …
Ecological Studies Of An Abyssal Nodule Province To Inform The Management Of Deep-Sea Mining, Kirsty Alexandra Mcquaid
Ecological Studies Of An Abyssal Nodule Province To Inform The Management Of Deep-Sea Mining, Kirsty Alexandra Mcquaid
School of Biological and Marine Sciences Theses
The abyssal environment remains one of the most poorly studied parts of the planet. While predominantly an environment dominated by soft sediments, some abyssal regions are known to harbour potato-sized, rock-like formations known as polymetallic nodules. These nodule provinces are now the subject of exploration by nations and their nominated contractors keen to develop a new deep-sea mining industry. This new industry has the potential for large-scale environmental impacts, but at present these impacts are difficult to predict, and therefore mitigate, as a result of the lack of ecological data and scientific understanding of these areas. The studies carried out …
A Safer Future With Clues From Earthquakes Past, L Menegon, I Stewart
A Safer Future With Clues From Earthquakes Past, L Menegon, I Stewart
School of Geography, Earth and Environmental Sciences
Understanding the short- and long-term mechanical behaviour of the lower crust is of fundamental importance when trying to understand the earthquake cycle and related hazard along active fault zones. In some regions some 20% of intracontinental earthquakes of magnitude > 5 nucleates in the lower crust at depth of 30-40 km. For example, a significant proportion of seismicity in the Himalaya, as well as aftershocks associated with the destructive 2001 Bhuj earthquake in India, nucleated in the granulitic lower crust of the Indian shield. Earthquakes in the continental interiors are often devastating and, over the past century, have killed significantly more …
Integrating Field And Laboratory Approaches For Ripple Development In Mixed Sand–Clay–Eps, Jaco H. Baas, Megan L. Baker, Jonathan Malarkey, Sarah J. Bass, Andrew J. Manning, Julie A. Hope, Jeffrey Peakall, Ian D. Lichtman, Leiping Ye, Alan G. Davies, Daniel R. Parsons, David M. Paterson, Peter D. Thorne
Integrating Field And Laboratory Approaches For Ripple Development In Mixed Sand–Clay–Eps, Jaco H. Baas, Megan L. Baker, Jonathan Malarkey, Sarah J. Bass, Andrew J. Manning, Julie A. Hope, Jeffrey Peakall, Ian D. Lichtman, Leiping Ye, Alan G. Davies, Daniel R. Parsons, David M. Paterson, Peter D. Thorne
School of Biological and Marine Sciences
No abstract provided.
Redefining ‘Clean’ Sand By Integrating Field And Laboratory Data On Mixed Sand–Clay–Eps Rippled-Bed Transport, J Baas, M Baker, J Malarkey, S Bass, A Manning, J Hope, J Peakall, I Lichtman, L Ye, A Davies
Redefining ‘Clean’ Sand By Integrating Field And Laboratory Data On Mixed Sand–Clay–Eps Rippled-Bed Transport, J Baas, M Baker, J Malarkey, S Bass, A Manning, J Hope, J Peakall, I Lichtman, L Ye, A Davies
School of Biological and Marine Sciences
No abstract provided.
Did Sea-Level Change Cause The Switch From Fissure-Type To Central-Type Volcanism At Mount Etna, Sicily?, Iain S. Stewart
Did Sea-Level Change Cause The Switch From Fissure-Type To Central-Type Volcanism At Mount Etna, Sicily?, Iain S. Stewart
School of Geography, Earth and Environmental Sciences
One of the most intriguing aspects of the evolution of Mount Etna (eastern Sicily) is the switch from a fissure-type shield volcano coincident with the Ionian coast to an inland cluster of nested stratovolcanoes close to the currently active centre. Previous geological studies infer that the switch reflects a tectonicallydriven rearrangement of the major border faults that direct the Etnean plumbing system, loosely dated at around 125 ka BP. New offshore structural studies throw this prevailing view into question, whilst a revised chronological framework indicates that the transformation from fissure- to central-type activity was abrupt, effectively occurring 129-126 ka BP. …
Fossils, Heritage And Conservation: Managing Demands On A Precious Resource, Kn Page
Fossils, Heritage And Conservation: Managing Demands On A Precious Resource, Kn Page
School of Geography, Earth and Environmental Sciences
This book is an essential resource for geoscientists, park and geopark managers, tourism and regional planning managers, as well as university students interested in geoheritage, geosites, geomorphosites, geoconservation, and geotourism.
Did The Kyrenia Range Of Northern Cyprus Rotate With The Troodos-Hatay Microplate During The Tectonic Evolution Of The Eastern Mediterranean?, Antony Morris, Alastair H.F. Robertson, Mark W. Anderson, Emma Hodgson
Did The Kyrenia Range Of Northern Cyprus Rotate With The Troodos-Hatay Microplate During The Tectonic Evolution Of The Eastern Mediterranean?, Antony Morris, Alastair H.F. Robertson, Mark W. Anderson, Emma Hodgson
School of Geography, Earth and Environmental Sciences
No abstract provided.
Framework For Development Of Clean Coal: Consultation Response, He Huppert, Mj Golding, Ma Hallworth, Et Al
Framework For Development Of Clean Coal: Consultation Response, He Huppert, Mj Golding, Ma Hallworth, Et Al
School of Engineering, Computing and Mathematics
We welcome the broad thrust of the draft framework for the development of clean coal. We are particularly pleased to note the emphasis on a diverse range of measures for mitigating climate change, the recognition that both market-based and regulatory approaches to encouraging the deployment of CCS are valuable, and the suggestion that the proposed requirement to demonstrate CCS should apply immediately. We make several suggestions on matters of detail in response to the consultation questions. Specifically, we suggest the establishment of a process of continual review of the realistic capacity of carbon dioxide storage reservoirs. We further suggest that, …
Guidance On Carbon Capture Readiness And Applications Under Section 36 Of The Electricity Act 1989: Consultation Response, He Huppert, Mj Golding, Ma Hallworth, Et Al
Guidance On Carbon Capture Readiness And Applications Under Section 36 Of The Electricity Act 1989: Consultation Response, He Huppert, Mj Golding, Ma Hallworth, Et Al
School of Engineering, Computing and Mathematics
We welcome the broad thrust of the DECC’s draft guidance document on carbon capture readiness at new power stations, and of the Secretary of State’s proposals for additional requirements for carbon capture and storage. We suggest several clarifications that could usefully be provided, either in the guidance document, or in subsidiary documents. Specifically, we suggest the establishment of a process of continual review of the realistic capacity of carbon dioxide storage reservoirs and the criteria for introducing new carbon storage reservoirs. We further suggest that to allow for the rapid rate of generation of new scientific information, the following are …
Report Of The Working Group On Deep-Water Ecology (Wgdec), 8-11 March 2005, Jm Hall-Spencer
Report Of The Working Group On Deep-Water Ecology (Wgdec), 8-11 March 2005, Jm Hall-Spencer
School of Biological and Marine Sciences
No abstract provided.
A New Species Of Amphipod Crustacean, Pleusymtes Comitari Sp Nov, Associated With Gorgonians On Deep-Water Coral Reefs Off Ireland, A. A. Myers, J. M. Hall-Spencer
A New Species Of Amphipod Crustacean, Pleusymtes Comitari Sp Nov, Associated With Gorgonians On Deep-Water Coral Reefs Off Ireland, A. A. Myers, J. M. Hall-Spencer
School of Biological and Marine Sciences
No abstract provided.
The Palaeo-Ecology And Biostratigraphy Of The Foraminifera From The Oxfordian Of North Dorset, Andrew Scott Henderson
The Palaeo-Ecology And Biostratigraphy Of The Foraminifera From The Oxfordian Of North Dorset, Andrew Scott Henderson
School of Geography, Earth and Environmental Sciences Theses
The Oxfordian rocks of north Dorset are poorly exposed at outcrop. A drilling operation was devised and implemented and the complete sequence of strata from the Weymouth Member of the Oxford Clay Formation through to the Ringstead Waxy Clay Formation was penetrated. Three boreholes were drilled; the Hallett's Farm Borehole, covering the strata from the stratigraphically youngest Ringstead Waxy Clay Formation down to the Cucklington Oolite; the Bowden Farm Borehole, continuing the sequence from the Cucklington Oolite into the lower part of the Hazelbury Bryan Formation and the Hartmoor Hill Borehole which continues downward into the Oxford Clay Formation. A …
A Palaeomagnetic Study Of Crustal Rotations And Their Relationship To The Tectonics Of The Atacama And Domeyko Fault Systems, Northern Chile, Darren Edward Randall
A Palaeomagnetic Study Of Crustal Rotations And Their Relationship To The Tectonics Of The Atacama And Domeyko Fault Systems, Northern Chile, Darren Edward Randall
School of Geography, Earth and Environmental Sciences Theses
A total of 178 sites have been collected for palaeomagnetic analysis from within two strike-slip fault systems in northern Chile (25.4°S - 26.4°S); the Atacama Fault System in the Coastal Cordillera, and the Domeyko Fault System in the Andean pre-Cordillera. In the Coastal Cordillera, analysis of Middle Jurassic lavas (La Negra Formation) and Middle Jurassic to Early Cretaceous dyke swarms reveal a consistent clockwise rotation of approximately 42°. The remanence from the La Negra Formation passes both fold and reversal tests and is interpreted as a pre-folding remanence. Four of the five dyke swarms have mixed polarity, suggesting that they …