A5030284075- Geological and Geochemical Analysis
- CO2 Sequestration and Geologic Interactions
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Geochemistry and Elemental Analysis
- Groundwater flow and contamination studies
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Drilling and Well Engineering
- Carbon Dioxide Capture Technologies
- Geological and Geophysical Studies Worldwide
- Mining Techniques and Economics
- Groundwater and Isotope Geochemistry
- Extraction and Separation Processes
- Mineral Processing and Grinding
- Metal Extraction and Bioleaching
- Clay minerals and soil interactions
- Paleontology and Stratigraphy of Fossils
- Radioactive element chemistry and processing
- Microbial bioremediation and biosurfactants
- Minerals Flotation and Separation Techniques
- Mercury impact and mitigation studies
- Seismic Waves and Analysis
British Geological Survey
2013-2024
Natural Environment Research Council
2024
University of Nottingham
2016
Kingsley House
2014
Concern about security of supply critical elements used in new technologies, such as the Rare Earth Elements (REE), means that it is increasingly important to understand processes by which they are enriched crustal settings. High REE contents found syenite-dominated alkaline complexes intruded along Moine Thrust Zone, a major collisional zone north-west Scotland. The most northerly these Loch Loyal Syenite Complex, comprises three separate intrusions. One these, Cnoc nan Cuilean intrusion,...
Peridotites and serpentinites (ultramafic rocks) serve as natural reservoirs of Mg2+, which can react with carbonate ions during mineral carbonation to form Mg-carbonates permanently sequester atmospheric CO2. Whole rock analyses a large number ultramafic rocks from various environments show that Ni concentrations in these reach 10.000 mg/kg[1]. In contrast, mid-ocean ridge basalts (MORB), also recognized promising feedstock for carbonation, have an average content 200 mg/kg[2,3].The fate ex...
In situ sequestration of CO2 in mantle peridotites has been proposed as a method to alleviate the amount anthropogenic atmosphere. This study presents results eight-month long laboratory fluid-rock experiments on representative rocks from Oman-United Arab Emirates ophiolite investigate this process. Small core samples (3 cm long) were reacted wet supercritical and CO2-saturated brine at 100 bar 70°C. The extent carbonate formation, hence degree carbon sequestration, varied greatly depending...
Abstract Hydrothermal alteration is a common process in active geothermal systems and can significantly change the physiochemical properties of rocks. To improve reservoir assessment modeling high-temperature resources linked to volcanic settings, detailed understanding needed. The Los Humeros Volcanic Complex, hosting third largest exploited field Mexico, represents natural laboratory investigate impact hydrothermal processes on rock through andesitic cores outcropping analogs....
Abstract Carbon dioxide capture and storage by mineralization has been proposed as a possible technology to contribute the reduction of global CO 2 levels. A main candidate feed material, supply Mg cations for combination with form carbonate, is family ultramafic rocks, Mg‐rich silicate rocks range naturally occurring mineralogical compositions. classification scheme described diagram display full both fresh altered rock This particularly benefit technologists raise awareness variation in...
Abstract Carbon capture and storage by mineralization is a potential method for storing anthropogenic CO 2 emissions, based on the reaction between Mg silicate to form carbonate. The conglomerates of Barzaman Formation exposed in eastern United Arab Emirates represent an excellent natural analogue this process. These were deposited as series alluvial fans along western margin Hajar Mountains, part Oman-UAE Ophiolite, are composed largely ultramafic lesser-mafic clasts. clasts matrix have...
Abstract Mineralogical studies of a silicified serpentinite from the United Arab Emirates throw light on formative processes. The is residuum palaeo-weathering surface that probably developed in temperate climate with alternating wet and dry periods during middle Eocene to late Miocene times. rock textures indicate silicification occurred fluid-saturated zone. Silica precipitation favoured at near-neutral pH. In this study we infer these pH conditions mineralizing fluids could arise...
Rare earth elements (REE) are essential raw materials used in modern technology. Current production of REE is dominated by hard-rock mining, particularly China, which typically requires high energy input. In order to expand the resource base REE, it important determine what alternative sources exist. placers have been known for many years, and require less than mining hard rock, but ore minerals derived from eroded granitic rocks commonly radioactive. Other types placers, such as those...
Abstract Hexavalent chromium (Cr 6+ ) is a toxic carcinogenic pollutant that might be released by the mining and processing of ultramafic rocks nickel laterites which requires permanent removal from contaminated biosphere. Ultramafic material can also serve as feedstock for sequestration CO 2 resulting growth new minerals, raising intriguing proposition integrated both pollutants, chromium, into magnesium carbonates. Such synergistic process downstream ore recovery mineral could an elegant...
Natural analogues of Portland cement can provide insights into carbonation processes operating over timescales interest to performance assessments CO2 storage. Two such sites in Northern Ireland (Scawt Hill and Carneal Plug) have been investigated, where reactions naturally-occurring minerals be observed. Here, partially hydrated larnite-rich nodules reacting with atmospheric or dissolved bicarbonate ions at low temperatures the last 10–20 thousand years. This has produced rims carbonate...
Despite a long history of detailed study, the extensive Jurassic sandstone outcrops Colorado Plateau in Southeast Utah, USA continue to provide opportunities examine reservoir-scale processes. There are number large-scale CO2 accumulations these reservoirs and locally also natural man-induced CO2-rich springs geysers, often producing or associated with travertine deposits. These rocks have therefore been exposed and/or waters over substantial period time, as such may information on resulting...
Abstract The significance of the potential impacts microbial activity on transport properties host rocks for geological repositories is an area active research. Most recent work has focused granitic environments. This paper describes pilot studies investigating changes in that are produced by sedimentary rock environments northern Japan. For first time, these short experiments (39 days maximum) have shown denitrifying bacteria, Pseudomonas denitrificans, can survive and thrive when injected...
This study focused on the reactions between carbon dioxide (CO2), porewater and host rock during geological CO2 storage in deep reservoirs. The aim of this work was to provide a well-constrained laboratory experiment reacting known quantities minerals with CO2-rich fluids, simulate situations where is being injected into lithologies underground. undertaken using Ti-column, 100 cm long, held within large pressure vessel. column packed simplified mineral assemblage. reactant fluid equilibrated...
Abstract Landfill and radioactive waste disposal risk assessments focus on contaminant transport are principally concerned with understanding the movement of gas, water solutes through engineered barriers naturalgroundwater systems. However, microbiologicalactivity can impact processes changing chemicaland physicalcharacteristics subsurface environment. Such effects generally caused by biofilms attached to rock surfaces. This paper will present some mineralogical petrographical observations...
ABSTRACT Geochemical and related studies have been made of near-surface sediments from the River Clyde estuary adjoining areas, extending Glasgow to N, W as far Holy Loch on coast Scotland, UK. Multibeam echosounder, sidescan sonar shallow seismic data, taken with core information, indicate that a layer modern sediment, often less than metre thick, rests earlier glacial post-glacial sediments. The offshore Quaternary history can be aligned onshore sequences, recognition buried drumlins,...
"Rare earth element placer deposits and alkaline volcanics: a case study from Aksu Diamas, Çanakli, Turkey." Applied Earth Science, 125(2), pp. 79–80
Abstract In NW Scotland, several alkaline intrusive complexes of Silurian age intrude the Caledonian orogenic front. The most northerly is Loch Loyal Syenite Complex, which divided into three separate intrusions (Ben Loyal, Beinn Stumanadh and Cnoc nan Cuilean). Mapping Cuilean intrusion shows two main zones: a Mixed Zone (MZ) Massive Leucosyenite (LZ), with gradational contact. MZ forms lopolith, multiple syenitic lithologies, including early basic melasyenites later felsic leucosyenites....
A light REE (LREE)-bearing mineral called chevkinite (Ce, La, Ca, Th)4(Fe2+, Mg)2(Ti, Fe3+)3Si4O22, originating from a heavy metal placer deposit Aksu Diamas in Turkey, previously assessed for potential extraction as by-product of magnetite production, was studied using scanning electron microscopy with energy and wavelength-dispersive spectrometers (SEM EDS-WDS). This exhibits analytical challenges associated severe X-ray overlaps between the REE, titanium, barium. Here, we present an...