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Showing 1 to 15 of 15 for “"Geological Materials"”.
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High Strain Rate Properties of Geological Materials
The dynamic response of various geological materials has been investigated through a series of plate impact experiments. The materials involved were supplied from various mines by De Beers and Rio Tinto and were generically termed: sandstone, scilified siltstone, kimberlite, quartz/feldspathic …
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Shock compression and dynamic fragmentation of geological materials
… compression and fragmentation of ge- ological materials with application to blast mining. Two geological materi- als were investigated; Lake Quarry Granite and Gosford Sandstone. Lake Quarry Granite was fully dense, while Gosford Sandstone was porous. The composition and microstructure of the …
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Synthesis of zeolites from geological materials and industrial wastes for potential application in environmental problems
… are seeking cheaper aluminosilicate bearing raw materials, such as clay minerals, to produce synthetic zeolites. This research concerns the synthesis of zeolites and zeotypes derived from low-cost materials like kaolinite (KAO), natural clinker (NC) and fly ash (FA). The motivation for using …
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Multiphysics algorithms for the simulation of geological materials under extreme conditions: the evolution and transport of ablated material
One of the biggest challenges to deep geothermal is the ability to drill sufficiently deep into very hot bedrock. The state of the art in conventional, mechanical drilling falls short at this task due to severe wearing effects. Millimetre wave (MMW) drilling is a non-contact technology that uses …
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Analyzing geological materials under martian conditions using laser-induced breakdown spectroscopy : plasma fundamentals, sample classification, and trace element quanitification
… for the study of solids, liquids and gases. Geological applications for LIBS are a particularly exciting area of research, in part due to the capabilities of the technique to quickly and simultaneously detect nearly all major, minor and trace elements on unprepared samples either in a …
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Adapting a Cryogen-Free Measurement System for Geological Materials: Method Development for Thermal Conductivity Measurements Below 300 K with Applications to Planetary Science
… Measurement System (CFMS) that was adapted for geological applications. Measurements were first collected for single-crystal minerals and obsidian to refine sample preparation and measurement procedures. This included developing techniques for handling friable samples, establishing thermal …
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The Helium-Ion-Microscope Secondary-Ion-Mass-Spectrometer: A New Tool for Earth and Materials Science
… A New Tool for Earth and Materials Science - Matthew Ball Geological materials are exceptionally complex, with heterogeneity across all lengthscales. Likewise, the history of these materials is complex, experiencing extremes of pressure and temperature from nanosecond shock …
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Separation, preconcentration and determination of rare earth elements by inductively coupled plasma emission spectroscopy
… used for studies of petrogenisis of different geological materials. For these studies, the REE must be determined precisely. An analytical program was established using an IL 200 Inductively Coupled Plasma, (ICP), spectrometer for the determination of the REE in various matrices, taking into …
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Developing archaeomagnetic dating in the British Iron Age.
… the magnetic properties of archaeological materials to date past human activity. This research aimed to use the evidence of past geomagnetism, as recorded by archaeological and geological materials, to identify and characterise short timescale changes in the Earth¿s magnetic field. This …
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Characteristics and modeling of the fracture properties of polymer-silica microparticulate composites via macroscopic scratch tests
The advantages of multi-phase materials are exploited in many industries, such as reinforced concrete in bridge construction, heterogeneous geological materials in petroleum engineering, advanced carbon fiber composites in aerospace engineering, and novel corrosion resistant coatings in the …
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The Development of Chemical and Biological Profiling for the Forensic Provenancing of Norfolk Soils
… when asserting their similarity; this applies to geological materials. Equally, soil profiling methods can be used to exclude soil samples from each other or an area. This research involves a number of chemical and biological profiling methods that have been used to build up a unique signature for …
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Hydrogen Interactions in the Subsurface Geological Formations: Molecular and Biogeochemical Perspectives
… to support a sustainable energy transition. Geological formations, such as depleted hydrocarbon reservoirs and saline aquifers, offer promising solutions for long-term storage, while naturally occurring hydrogen provides a potential continuous supply. However, a limited understanding of …
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Modelling of Subsidence in Geothermal Fields
… It can handle 3-D problems for heterogeneous geological materials together with simple or complex constitutive modelling laws such as those applied in the study carried out here. Pressure and temperature information from the reservoir model over 50 years of production history are interpolated …
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Cross-border risk assessment of earthquake-induced landslides in Central Asia
… human facilities. The large variability of local geological materials, together with the difficulties in forecasting heavy precipitation locally and in quantifying the level of ground shaking, call for harmonized procedures to better quantify the hazard and the negative impact of slope failures …
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Detection and Quantification of Single-walled Carbon Nanotubes in Environmental and Biological Samples for Evaluation of Fate, Transport and Bioaccumulation
… and making environmental regulations for nanomaterials. Currently the lack of standardized sensitive characterization and quantitative analytical methods for SWCNT determination at the current levels in the environment is one major barrier for evaluation of their real impact to the …