A5103028248- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Geochemistry and Elemental Analysis
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Hydrocarbon exploration and reservoir analysis
- Radioactive element chemistry and processing
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Clay minerals and soil interactions
- Arctic and Antarctic ice dynamics
- Groundwater flow and contamination studies
- Geophysical and Geoelectrical Methods
- Geological formations and processes
- Geological and Geophysical Studies
- Hydraulic Fracturing and Reservoir Analysis
- Groundwater and Isotope Geochemistry
- Paleontology and Stratigraphy of Fossils
- Geomagnetism and Paleomagnetism Studies
- Cryospheric studies and observations
- Semantic Web and Ontologies
- Metal Extraction and Bioleaching
- Protein purification and stability
- Geological Studies and Exploration
- Reservoir Engineering and Simulation Methods
University of Brighton
2015-2024
Quest Diagnostics (United States)
2024
British Geological Survey
1994-2024
NSW Department of Planning and Environment
2021
University of Minnesota
2020
Geoscience Australia
2018
Primetals Technologies (United Kingdom)
2015-2017
University of Wisconsin–Madison
2014-2016
Arizona State University
2014-2015
Lonza (United Kingdom)
2009-2012
We describe the design, manufacture, and performance of bare-fiber integral field units (IFUs) for SDSS-IV survey MaNGA (Mapping Nearby Galaxies at APO) on Sloan 2.5 m telescope Apache Point Observatory (APO). is a luminosity-selected integral-field spectroscopic 10,000 local galaxies covering 360-1030 nm R ~ 2200. The IFUs have hexagonal dense packing fibers with regularity 3 um (RMS), throughput 96+/-0.5% from 350 to 1 in lab. Their sizes range 19 127 (3-7 layers) using Polymicro FBP...
Global resources of heavy Rare Earth Elements (REE) are dominantly sourced from Chinese regolith-hosted ion-adsorption deposits in which the REE inferred to be weakly adsorbed onto clay minerals. Similar elsewhere might provide alternative supply for these high-tech metals, but adsorption mechanisms remain unclear and state clays has never been demonstrated situ. This study compares mineralogy speciation economic weathering profiles China prospective regoliths developed on peralkaline rocks...
Research Article| October 01, 2012 Diversity of Rare Earth Deposits: The Key Example China Jindrich Kynicky; Kynicky 1Department Geology and Pedology, Mendel University in Brno, Zemedelska 3, 613 00 Czech RepublicE-mail: jindrak@email.cz Search for other works by this author on: GSW Google Scholar Martin P. Smith; Smith 2School the Environment Technology, Brighton, BN2 4GJ, UKE-mail: martin.smith@brighton.ac.uk Cheng Xu 3Laboratory Orogenic Belts Crustal Evolution, School Space Sciences,...
GPS and low-cost INS sensors are widely used for positioning attitude determination applications. Low-cost inertial exhibit large errors that can be compensated using position velocity updates from GPS. Combining both a Kalman filter provides high-accuracy, real-time navigation. A conventional relies on the correct definition of measurement process noise matrices, which generally defined priori remain fixed throughout processing run. Adaptive filtering techniques use residual sequences to...
Structural and metamorphic studies within the exposed Precambrian basement in Kenya indicate that a number of heterogeneities exist lithosphere beneath line Rift. Of these, most important is mechanical thermal contrast between thick, cold, rigid Archean thinner anisotropic Proterozoic mobile belt crust/lithosphere. Structural, geophysical, heat flow data during late collisional event margin Tanzanian craton was reworked, overthrust, effectively buried by tectonically emplaced “Mozambique...
Garnets from skarns in the Beinn an Dubhaich granite aureole, Isle of Skye, Scotland, have a large range concentrations uranium (0·2–358 ppm) and rare earth elements (REE) (23–4724 ppm). Variations these correlate with major element zonation within garnets, changes shape REE patterns. Typical patterns most garnets display light (LREE) enrichment, flat heavy (HREE) distribution negative Eu anomaly. These are interpreted to represent equilibrium trace exchange between pre-existing pyroxene,...
Abstract Heavy rare earth elements (HREE) are dominantly mined from the weathering crusts of granites in South China. Although processes occur globally, no economic HREE resources this type have yet been found outside Here, we report occurrence unidentified REE minerals Chinese deposits. They contain high levels both and light REE, but strongly depleted Ce, implying oxidation state. These show higher initial Nd isotope than primary REE-rich ( ɛ Nd( t )=0.9±0.8 versus −11.5±0.5). The...
Research Article| February 09, 2018 Genesis of the world’s largest rare earth element deposit, Bayan Obo, China: Protracted mineralization evolution over ∼1 b.y. Wenlei Song; Song 1Key Laboratory Orogenic Belts and Crustal Evolution, School Earth Space Sciences, Peking University, Beijing 100871, China Search for other works by this author on: GSW Google Scholar Cheng Xu; Xu * *E-mail: xucheng1999@pku.edu.cn Martin P. Smith; Smith 2School Environment Technology, University Brighton, Brighton...
Abstract This study examines the impact of spatial landscape configuration (e.g., clustered, dispersed) on land‐surface temperatures (LST) over Phoenix, Arizona, and Las Vegas, Nevada, USA. We classified detailed land‐cover types via object‐based image analysis (OBIA) using Geoeye‐1 at 3‐m resolution (Las Vegas) QuickBird 2.4‐m (Phoenix). Spatial autocorrelation (local Moran's I ) was then used to test for dependence determine how clustered or dispersed points were arranged. Next, we...
The relative criticality of mineral commodities is evaluated using a wide range parameters and in different contexts (e.g., from the standpoint their importance to national security, or specific industrial application), which explains multiplicity classification schemes variations terminology applied these literature, media government reports. core group critical metals, listed alphabetically, includes: antimony, beryllium, chromium, cobalt, gallium, germanium, indium, lithium, niobium,...
We validated seasonal RayMan and ENVI-met mean radiant temperature (TMRT) simulations to assess model performance in a sensitivity analysis from cold extremely hot conditions. Human-biometeorological validation data were collected Tempe, Arizona via transects during five field campaigns between 2014 2017. Transects conducted across seven locations two three-hour intervals 6:00 23:00 LST with Kestrel meter thermal camera (2014–2015) the mobile instrument platform MaRTy (2017). Observations...
Detrital zircons in siliciclastic units of the Dalradian Supergroup yield U–Pb ages ranging from 3.2 to 0.5 Ga. sub-Grampian Group basement and Grampian are predominantly Palaeoproterozoic Mesoproterozoic with Archaean grains absent or rare. In contrast, overlying Appin, Argyll Southern Highland groups contain a significant contribution detrital zircon grains, some which locally preserve evidence for late overgrowths dated at c . 1.8 addition, on concordia plots slightly discordant lower...
Northern Norrbotten, Sweden is a key part of Baltic Shield and provides record magmatic, tectonic related, superimposed, Fe oxide–apatite iron oxide–copper–gold (IOCG) mineralization, during the Svecokarelian orogeny. Titanite allanite from range mineral deposits in area have been analysed for U–Pb isotope systematics trace element chemistry using laser ablation quadrupole inductively coupled plasma-mass spectrometry (LA-ICP-MS). Analyses single sample regional scapolite–albite alteration...
Abstract Carbonatites, usually occurring within intra-continental rift-related settings, have strong light rare earth element (LREE) enrichment; they rarely contain economic heavy REE (HREE). Here, we report the identification of Late Triassic HREE-Mo-rich carbonatites in northernmost Qinling orogen. The rocks abundant primary HREE minerals and molybdenite. Calcite-hosted fluid inclusions, inferred to represent a magmatic-derived aqueous phase, significant concentrations Mo (~17 ppm),...
Ion adsorption deposits, in which the rare earth elements (REE) occur adsorbed onto clay mineral surfaces, currently provide world's dominant supply of heavy REE (Gd-Lu). Concentration within ion deposits has been proposed to be a dominantly supergene process, where easily degradable REE-minerals (e.g. REE-fluorcarbonates) break down and release that are then surfaces weathered material. Here we present data from Cenozoic Ambohimirahavavy alkaline complex Madagascar, with aim further...
The silico‑carbonatite dykes of the Huanglongpu area, Lesser Qinling, China, are unusual in that they quartz-bearing, Mo-mineralised and enriched heavy rare earth elements (HREE) relative to typical carbonatites. textures REE minerals indicate crystallisation monazite-(Ce), bastnäsite-(Ce), parisite-(Ce) aeschynite-(Ce) as magmatic phases. Burbankite was also potentially an early crystallising phase. Monazite-(Ce) subsequently altered produce a second generation apatite, which turn replaced...
Rare earth elements (REEs + Y) play an important role in modern industry. Heavy REEs (HREEs) are particularly critical because of their relative scarcity nature. Global HREE resources predominantly present granitoid weathering crusts southern China. Although it is well known that generally enriched alkaline rocks, contrast, the parental granitoids most Chinese deposits peraluminous. Here, we examined different REE mineral compositions, distribution patterns, and Nd isotope ratios complex...
The Bayan Obo Fe-REE-Nb deposit, Inner Mongolia, China, is the world’s largest REE resource and also exploited as a major Fe oxide deposit. deposit consists of replacement bodies hosted in dolomite marble magnetite, hematite, minerals associated with apatite, aegirine, amphibole, fluorite, calcite, barite. Fluid inclusions from monazite-(Ce), bastnasite-(Ce), apatite, barite were studied from eight samples to provide new constraints on ore genesis. During early disseminated monazite...