A5068376795- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Mineralogy and Gemology Studies
- Geochemistry and Elemental Analysis
- Hydrocarbon exploration and reservoir analysis
- Clay minerals and soil interactions
- Geology and Paleoclimatology Research
- Radioactive element chemistry and processing
- Methane Hydrates and Related Phenomena
- Crystal Structures and Properties
- Mercury impact and mitigation studies
- Planetary Science and Exploration
- Geological and Geophysical Studies Worldwide
- Analytical chemistry methods development
- Extraction and Separation Processes
- Paleontology and Stratigraphy of Fossils
- Turtle Biology and Conservation
- Drilling and Well Engineering
- Radioactivity and Radon Measurements
- Laser-induced spectroscopy and plasma
- Metal Extraction and Bioleaching
McGill University
2015-2024
University of Salzburg
2020
University of Oxford
2011-2014
Planetary Science Institute
2013
Tata Steel (India)
2013
University of Bristol
2005-2009
Utrecht University
2003
Tourmaline-supergroup minerals are ubiquitous accessory in rocks of the Earth’s crust. They can adjust their composition to suit a wide variety environments, and therefore display remarkable range stability terms pressure, temperature, fluid composition, host-rock composition. Because this compositional sensitivity, tourmaline is an excellent indicator environmental conditions its host. This further enhanced by negligible diffusion up high temperatures strongly refractory character during...
Research Article| October 01, 2011 Tourmaline as a Petrologic Forensic Mineral: A Unique Recorder of Its Geologic Past Vincent J. van Hinsberg; Hinsberg 1Department Earth Sciences, University Oxford South Parks Road, Oxford, UK E-mail: V.J.vanHinsberg@gmx.net Search for other works by this author on: GSW Google Scholar Darrell Henry; Henry 2Department Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, USA Barbara L. Dutrow Author Article Information Publisher:...
Tourmaline is a ubiquitous accessory mineral in magmatic deposits, especially those of evolved compositions. It displays high compositional sensitivity to the composition its host environment, as well pressure, temperature and f (O 2 ). These characteristics make tourmaline an ideal monitor physical chemical conditions silicate melt. Of particular interest potential record trace-element signature However, read this requires knowledge partitioning behavior trace elements between Here, I...
Abstract White mica and tourmaline are the dominant hydrothermal alteration minerals at world-class Panasqueira W–Sn–Cu deposit in Portugal. Thus, understanding controls on their chemical composition helps to constrain ore formation processes this determine usefulness as pathfinder for mineralization general. We combine whole-rock geochemistry of altered unaltered metasedimentary host rocks with situ LA-ICP-MS measurements white from halo. Principal component analysis (PCA) is used better...
Abstract Clinopyroxene is a key fractionating phase in alkaline magmatic systems, but its impact on metal enrichment processes, and the formation of REE + HFSE mineralisation particular, not well understood. To constrain control clinopyroxene behaviour sodic (per)alkaline magmas, series internally heated pressure vessel experiments was performed to determine clinopyroxene–melt element partitioning systematics. Synthetic tephriphonolite phonolite compositions were run H2O-saturated at 200...
Research Article| September 01, 2014 High-Sulfidation Epithermal Pyrite-Hosted Au (Ag-Cu) Ore Formation by Condensed Magmatic Vapors on Sangihe Island, Indonesia* Julia King; King † 1Department of Earth and Planetary Sciences, McGill University, 3450 University Street, Montréal, Québec, Canada H3A 0E8 †Corresponding author: e-mail, julia.j.king@gmail.com Search for other works this author on: GSW Google Scholar A.E. Williams-Jones; Williams-Jones Vincent van Hinsberg; Hinsberg Glyn...
This paper investigates the petrogenesis of Seqi Ultramafic Complex, which covers a total area approximately 0.5 km2. The ultramafic rocks are hosted by tonalitic orthogneiss ca. 3000 Ma Akia terrane with crosscutting granitoid sheets providing an absolute minimum age 2978 ± 8 for Complex. represent broad range olivine-dominated plutonic varying modal amounts chromite, orthopyroxene and amphibole, i.e. various types dunite (s.s.), peridotite (s.l.), as well chromitite. Complex is...
We have carried out tourmaline-synthesis experiments in the system Na 2 O–CaO–MgO–Al O 3 –SiO –H O–B at 200 MPa between 500° and 700°C under various total concentrations of Ca order to investigate distribution tourmaline fluid. Starting materials were oxide–hydroxide mixtures with NaCl + CaCl solutions different concentrations. The main end-members synthetic tourmalines are dravite – uvite “oxy-uvite” (deprotonated Ca-tourmaline). dominant substitutions □AlNa −1 Mg , □Al −2 NaHCa their...
One of the best preserved Archean igneous complexes in world is located Fiskenæsset region SW Greenland and known as Anorthosite Complex (FAC). The hosts a variety high-grade rock types ranging from anorthosites (clino-orthopyroxene / amphibole bearing), metaperidotites, garnetiferous amphibolites, pyroxenites chromitites. Several studies have interpreted this to represent subduction zone setting with hydrous recycling lithosphere arc magmatism operating early Mesoarchean, leading...
Tourmaline is a ubiquitous accessory phase in rocks spanning wide range of P–T–X conditions; owing to its compositional sensitivity variations such conditions, it potentially an ideal indicator mineral. Here, we apply variety tools reconstruct the history Variscan metamorphic basement central Massif Central France using tourmaline compositions and zoning. thermometry, temperature dependence element partitioning among sectors individual grains, indicates that these grains record preserve full...
Abstract Thorium is the most abundant actinide in Earth’s crust and has universally been considered one of immobile elements natural aqueous systems. This view, however, based almost exclusively on solubility data obtained at low temperature their theoretical extrapolation to elevated temperature. The occurrence hydrothermal deposits with high concentrations Th challenges immobility paradigm strongly suggests that may be mobilized by some fluids. Here, we demonstrate experimentally Th,...
A new type of sector zoning, with an hourglass shape, has been identified in metamorphic tourmalines that formed under a wide variety physical and chemical conditions. The two sectors the c-direction are not equivalent due to asymmetry crystal structure tourmaline along c-axis. c+ is characterized by low concentrations Ti, Ca, Mg, Na, although Al high, pale (commonly blue or pale-green) color. Conversely, c. Mg Al, high Fe, Ti (the latter causing dark-brown color this sector). a-sector...