Search Results - "Groat, Lee A"

Iron, zinc, magnesium and uranium isotopic fractionation during continental crust differentiation: The tale from migmatites, granitoids, and pegmatites by Telus, Myriam, Dauphas, Nicolas, Moynier, Frédéric, Tissot, François L.H., Teng, Fang-Zhen, Nabelek, Peter I., Craddock, Paul R., Groat, Lee A.

“…The causes of some stable isotopic variations in felsic rocks are not well understood. In particular, the origin of the heavy Fe isotopic compositions (i.e.,…”
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Emerald Deposits: A Review and Enhanced Classification by Gaston Giuliani, Lee A. Groat, Dan Marshall, Anthony E. Fallick, Yannick Branquet

“…Although emerald deposits are relatively rare, they can be formed in several different, but specific geologic settings and the classification systems and…”
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Ruby Deposits: A Review and Geological Classification by Gaston Giuliani, Lee A. Groat, Anthony E. Fallick, Isabella Pignatelli, Vincent Pardieu

“…Corundum is not uncommon on Earth but the gem varieties of ruby and sapphire are relatively rare. Gem corundum deposits are classified as primary and secondary…”
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Significant Li isotope fractionation in geochemically evolved rare element-bearing pegmatites from the Little Nahanni Pegmatite Group, NWT, Canada by Barnes, Elspeth M., Weis, Dominique, Groat, Lee A.

“…Lithium isotope signatures of whole rock pegmatite samples and mineral separates from the rare element-bearing Little Nahanni Pegmatite Group, NWT, and whole…”
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Sedimentary and igneous phosphate deposits; formation and exploration; an invited paper by Pufahl, Peir K, Groat, Lee A

“…Phosphorus is the central ingredient in fertilizer that allows modern agriculture to feed the world's population. This element, also critical in a host of…”
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Crystal Structure of Kristiansenite from Szklarska Poręba, Southwestern Poland by R. James Evans, Bożena Gołębiowska, Lee A. Groat, Adam Pieczka

“…Kristiansenite, ideally Ca2ScSn(Si2O7)(Si2O6OH), a rare late-stage hydrothermal Sc-bearing sorosilicate mineral, was found in a gadolinite-fergusonite-type…”
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Initial exploration results of the Collins epithermal Au‐base metal prospect, Aceh, Indonesia by Mulja, Thomas, Ebert, Shane, Groat, Lee A.

“…Interpretation of various exploration data, in particular geochemical prospecting, offers a powerful and rapid assessment of grass‐root projects in a…”
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Metacarbonate-hosted spinel on Baffin Island, Nunavut, Canada; insights into the origin of gem spinel and cobalt-blue spinel by Belley, Philippe M, Groat, Lee A

“…Samples from 14 spinel occurrences in the Lake Harbour Group (LHG), Baffin Island, Nunavut, Canada, were studied using a combination of petrography, whole rock…”
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Telluride mineralogy of the Deer Horn Au-Ag-Te-(Bi-Pb-W) deposit, British Columbia; implications for the generation of tellurides by Roberts, Jordan A, Groat, Lee A, Spry, Paul G, Cempirek, Jan

“…The Deer Horn deposit, located 150 km south of Smithers in west-central British Columbia, is an Eocene polymetallic system enriched in Au-Ag-Te with lesser…”
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Crystal-chemical observations and the relation between sodium and H2O in different beryl varieties by Henry, Rhiana E, Groat, Lee A, Evans, R. James, Cempirek, Jan, Skoda, Radek

“…Beryl (Be3Al2Si6O18) is a well-known mineral, most famously in its vivid green form of emerald, but also as a range of other colors. Prominent varieties of…”
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The effect of amphibolite facies metamorphism on the U–Th–Pb geochronology of accessory minerals from meta-carbonatites and associated meta-alkaline rocks by Millonig, Leo J., Gerdes, Axel, Groat, Lee A.

“…In this study we apply laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) to the accessory minerals apatite, baddeleyite, monazite,…”
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A crystallographically supported equation for calculating water in emerald from the sodium content by Henry, Rhiana E, Groat, Lee A, Evans, R. James, Cempirek, Jan, Skoda, Radek

“…Emerald is the most well-recognized beryl (Be3Al2Si6O18) variety, and although it has been extensively studied, a satisfactory method for quantifying the water…”
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Reflectance spectroscopy and hyperspectral imaging of sapphire-bearing marble from the Beluga occurrence, Baffin Island, Nunavut by Turner, David, Groat, Lee A, Rivard, Benoit, Belley, Philippe M

“…Baffin Island (Nunavut, Canada) is located in the remote arctic where geological exposure is high, terrain is expansive, and field seasons are short…”
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Mineralogy and geochemistry of pegmatites on Mount Begbie, British Columbia by Dixon, Andrea, Cempirek, Jan, Groat, Lee A

“…The pegmatite group on the northern slope of Mount Begbie, near Revelstoke, B.C., comprises more than 50 relatively small pegmatite bodies. The pegmatites have…”
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Genesis of emerald-bearing quartz veins associated with the Lened W-skarn mineralization, Northwest Territories, Canada by Lake, Donald J, Groat, Lee A, Falck, Hendrik, Mulja, Thomas, Cempirek, Jan, Kontak, Daniel, Marshall, Daniel, Giuliani, Gaston, Fayek, Mostafa

“…Emerald at the Lened occurrence in the western Northwest Territories is hosted by quartz veins cutting skarn near the Lened granite pluton and older Selwyn…”
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Mechanical and structural properties of radiation-damaged allanite-(Ce) and the effects of thermal annealing by Reissner, Claudia E., Bismayer, Ulrich, Kern, Daniel, Reissner, Michael, Park, Sulgiye, Zhang, Jiaming, Ewing, Rodney C., Shelyug, Anna, Navrotsky, Alexandra, Paulmann, Carsten, Škoda, Radek, Groat, Lee A., Pöllmann, Herbert, Beirau, Tobias

“…The onset of thermally induced, heterogeneous structural reorganization of highly radiation-damaged allanite-(Ce) begins at temperatures below 700 K. Three…”
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Mineralogy of the Ash Mountain Sn-bearing skarn, Tuya Range, northern British Columbia, Canada by Scribner, Emily D, Groat, Lee A, Cempirek, Jan

“…The Ash Mountain Sn-bearing skarn, located in the Tuya Range of the Cassiar Mountains in northern British Columbia (59°17'50'N, 130°31'04'W), was investigated…”
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Distribution of trace and rare earth elements in titanite from tungsten and molybdenum deposits in Yukon and British Columbia, Canada by Che Xudong, Che Xudong, Linnen, Robert L, Wang Rucheng, Wang Rucheng, Groat, Lee A, Brand, Allison A

“…The chemical compositions of titanite in igneous rocks, hydrothermal veins, skarns, and hornfels from eight tungsten and molybdenum deposits in Yukon and…”
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Temperature-induced P21/c to C2/c phase transition in partially amorphous (metamict) titanite revealed by Raman spectroscopy by Beirau, Tobias, Mihailova, Boriana, Malcherek, Thomas, Paulmann, Carsten, Bismayer, Ulrich, Groat, Lee A

“…In situ temperature-dependent Raman spectroscopic measurements of two partially amorphous (metamict) titanite samples with accumulated radiation doses…”
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Origin of gem corundum in calcite marble: The Revelstoke occurrence in the Canadian Cordillera of British Columbia by Dzikowski, Tashia J., Cempírek, Jan, Groat, Lee A., Dipple, Gregory M., Giuliani, Gaston

“…The calcite marble-hosted gem corundum (ruby, sapphire) occurrence near Revelstoke, British Columbia, Canada, occurs in the Monashee Complex of the Omineca…”
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