A5018600577- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- High-pressure geophysics and materials
- CO2 Sequestration and Geologic Interactions
- Phase Equilibria and Thermodynamics
- Methane Hydrates and Related Phenomena
- Chemical and Physical Properties in Aqueous Solutions
- Calcium Carbonate Crystallization and Inhibition
- Geology and Paleoclimatology Research
- Hydraulic Fracturing and Reservoir Analysis
- Geomagnetism and Paleomagnetism Studies
- Mineralogy and Gemology Studies
- Glass properties and applications
- Thermodynamic properties of mixtures
- Spectroscopy and Laser Applications
- Geological Studies and Exploration
- Geochemistry and Elemental Analysis
- Spectroscopy and Quantum Chemical Studies
- Material Dynamics and Properties
- Crystallization and Solubility Studies
- Enhanced Oil Recovery Techniques
- Minerals Flotation and Separation Techniques
- Paleontology and Stratigraphy of Fossils
University of Alberta
2017-2025
University of British Columbia
2023
Simon Fraser University
2023
University of Arizona
2015-2019
University of Massachusetts Lowell
2017
ETH Zurich
2014-2016
Institute of Geochemistry
2015
Virginia Tech
2010-2014
Melt inclusions (MI) are considered the best tool available for determining pre-eruptive volatile contents of magmas. H2O and CO2 concentrations glass phase in MI commonly used both as a barometer to track magma degassing behavior during ascent due strong pressure dependence solubilities silicate melts. The often unstated sometimes overlooked requirement this method be valid is that must represent composition melt was trapped at depth volcanic plumbing system. However, contain vapor bubble...
Melt inclusions (MI) represent the best source of information concerning pre-eruptive volatile contents magmas. If trapped melt is enriched in species, following trapping MI may generate a vapor bubble containing volatiles that have exsolved from melt. Thermodynamic modeling vapor-saturated albitic composition (NaAlSi3O8) shows CO2 content phase sensitive to small amounts post-entrapment crystallization (PEC), whereas H2O less PEC. During PEC, transferred and contain significant amount, if...
Burial histories of subduction zone rocks are often difficult to accurately constrain, owing a lack robust mineral geobarometers applicable high pressure assemblages. Knowledge the depth‐histories is, however, required for our understanding global geochemical cycles, subduction‐related seismicity, and evolution destructive tectonic boundaries. The spatial resolution quartz inclusion geobarometry can be used determine during metamorphic growth individual garnet crystals. Quartz inclusions in...
Abstract Fluid overpressures are widely expected during hydrocarbon generation and expulsion from source rocks, yet direct evidence for this phenomenon is lacking in the case of organic-rich shales. Here we show that formation bed-parallel fibrous calcite veins mature laminated shales Eocene Dongying depression, Bohai Bay Basin, east China, occurred response to fluid overpressure due generation. The recorded by coexisting primary aqueous petroleum inclusions fibers. Our results all analyzed...
Constraining the volatile content of magmas is critical to our understanding eruptive processes and their deep Earth cycling essential planetary habitability [R. Dasgupta, M. Hirschmann,
Abstract The origins of magnetite-apatite deposits are controversial, and the crux debate is what types fluids form these rocks. We present evidence from 20 worldwide showing ubiquitous involvement molten salts. studied distributed globally, various tectonic settings, Precambrian to Quaternary in age. In every case, water-poor polycrystalline melt inclusions ore-stage minerals dominated by sulfate, chloride, carbonate components plus variable proportions calc-silicates, phosphates, iron ±...
The shifts in wavenumber of the ν3(SiO4) (~1008 cm-1) Raman band fully crystalline synthetic zircon with changing pressure (P) and temperature (T) were calibrated for application as a spectroscopic sensor optical cells to about 1000 °C 10 GPa. relationship between (ν) this T from 22 950 is described by equation ν (cm-1) = 7.54·10−9·T3 - 1.61·10−5·T2 2.89·10−2·T + 1008.9, where given °C.
Vibrational spectroscopy techniques are commonly used to probe the atomic-scale structure of silica species in aqueous solution and hydrous glasses. However, unequivocal assignment individual spectroscopic features specific vibrational modes is challenging. In this contribution, we establish a connection between experimentally observed bands ab initio molecular dynamics (MD) glass. Using mode-projection approach, decompose vibrations into subspectra resulting from several fundamental...
Research Article| December 01, 2015 Salt precipitation in magmatic-hydrothermal systems associated with upper crustal plutons Pilar Lecumberri-Sanchez; Lecumberri-Sanchez * 1Institute of Geochemistry and Petrology, ETH Zurich, Clausiusstrasse 25, CH-8092 Switzerland *E-mail: pilar@erdw.ethz.ch Search for other works by this author on: GSW Google Scholar Matthew Steele-MacInnis; Steele-MacInnis Switzerland2Department Geosciences, University Arizona, 1040 E 4th Street, Tucson, Arizona 85721,...
Abstract The origins of Kiruna-type magnetite(-apatite) [Mt(-Ap)] deposits are contentious, with existing models ranging from purely hydrothermal to orthomagmatic end members. Here, we evaluate the compositions fluids that formed classic yet enigmatic Mt(-Ap) deposit at El Laco, northern Chile. We report evidence ore-stage minerals crystallized an Fe-rich (6–17 wt% Fe) sulfate melt. suggest a major component liquid was derived assimilation evaporite-bearing sedimentary rocks during...
Abstract Structurally controlled dolomitization typically involves the interaction of high‐pressure (P), high‐temperature (T) fluids with surrounding host rock. Such reactions are often accompanied by cementation and recrystallization, resulting hydrothermal dolomite (HTD) bodies including several ‘diagnostic’ rock textures. Zebra textures, associated boxwork textures breccias, widely considered to reflect these elevated P/T conditions. Although a range conceptual models have been proposed...
Abstract Magnetite-(apatite) ore deposits are interpreted as being formed by the crystallization of iron-rich ultrabasic melts, dominantly generated interaction silicate melts with oxidized P-F-SO 4 -bearing sedimentary rocks. This hypothesis is supported geologic evidence, experimental studies, numerical modeling, stable and radiogenic isotope geochemistry, mineralogy, melt- mineral-inclusion data. Assimilation crustal rocks during ascent promotes separation from a magma Fe-rich, Si-Al-poor...
Abstract Chemical exchange between silicate magmas and carbonate rocks has major implications for igneous fractionation, atmospheric CO2 flux, formation of mineral deposits. However, this process is only partly understood, long-standing questions whether, where, how can be digested by melts remain controversial. We describe evidence pervasive chemical melt rock in a shallow porphyry setting driven limestone assimilation. Melt inclusions endoskarn from the Chating Cu-Au deposit eastern China...