Search Results - "Gaston Giuliani"

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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Advances in 3D imaging and volumetric reconstruction of fluid and melt inclusions by high resolution X-ray computed tomography by Richard, Antonin, Morlot, Christophe, Créon, Laura, Beaudoin, Nicolas, Balistky, Vladimir S., Pentelei, Svetlana, Dyja-Person, Vanessa, Giuliani, Gaston, Pignatelli, Isabella, Legros, Hélène, Sterpenich, Jérôme, Pironon, Jacques

“…Fluid and melt inclusions are tiny pockets of fluid and melt trapped in natural and synthetic minerals. Characterizing the 3D distribution of fluid and melt…”
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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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Gemstones of Greece: Geology and Crystallizing Environments by Panagiotis Voudouris, Constantinos Mavrogonatos, Ian Graham, Gaston Giuliani, Alexandre Tarantola, Vasilios Melfos, Stefanos Karampelas, Athanasios Katerinopoulos, Andreas Magganas

“…In the Hellenides Orogen, minerals of various gem quality occur in various rock types from mainly four tectono-metamorphic units, the Rhodope, Pelagonian, and…”
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Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis by Panagiotis Voudouris, Constantinos Mavrogonatos, Ian Graham, Gaston Giuliani, Vasilios Melfos, Stefanos Karampelas, Vilelmini Karantoni, Kandy Wang, Alexandre Tarantola, Khin Zaw, Sebastien Meffre, Stephan Klemme, Jasper Berndt, Stefanie Heidrich, Federica Zaccarini, Anthony Fallick, Maria Tsortanidis, Andreas Lampridis

“…Greece contains several gem corundum deposits set within diverse geological settings, mostly within the Rhodope (Xanthi and Drama areas) and Attico-Cycladic…”
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Fingerprinting Paranesti Rubies through Oxygen Isotopes by Kandy K. Wang, Ian T. Graham, Laure Martin, Panagiotis Voudouris, Gaston Giuliani, Angela Lay, Stephen J. Harris, Anthony Fallick

“…In this study, the oxygen isotope (δ18O) composition of pink to red gem-quality rubies from Paranesti, Greece was investigated using in-situ secondary…”
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Incipient charnockitisation due to carbonic fluid transfer related to late Pan-African transcurrent tectonics in Madagascar; implications for mobility of Fe, Ti, REE and other elements by Nédélec, Anne, Guillaume, Damien, Cournède, Cécile, Duran, Charley, Macouin, Mélina, Rakotondrazafy, Michel, Giuliani, Gaston

“…•Incipient charnockite after A-type granite.•Secondary magnetite in charnockite is responsible for higher magnetic susceptibility.•Fluid inclusions contain a…”
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Incipient charnockitisation triggered by structurally-controlled CO2 influx in central Madagascar and magnetic implications by Rakotondrazafy, Michel A.F., Nédélec, Anne, Giuliani, Gaston

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Preface by Giuliani, Gaston, Marshall, Dan

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Basal twinning of Greenland corundum by Pignatelli, Isabella, Nespolo, Massimo, Pardieu, Vincent, Giuliani, Gaston, Morlot, Christophe

“…Natural corundum shows two types of twins: “basal twin”, by reflection on (0003) pinacoid, very rare, and “rhombohedral twin”, by reflection on ( 10 1 ¯ 1 ),…”
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Oxygen Isotopes and Emerald Trade Routes since Antiquity by Giuliani, Gaston, Chaussidon, Marc, Schubnel, Henri-Jean, Piat, Daniel H., Rollion-Bard, Claire, France-Lanord, Christian, Giard, Didier, de Narvaez, Daniel, Rondeau, Benjamin

“…Oxygen isotopic compositions of historical emerald artifacts from the Gallo-Roman period to the 18th century indicate that during historical times, artisans…”
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Pressure, temperature and fluid conditions during emerald precipitation, southeastern Yukon, Canada: fluid inclusion and stable isotope evidence by Marshall, Dan, Groat, Lee, Giuliani, Gaston, Murphy, Don, Mattey, Dave, Ercit, T.Scott, Wise, Michael A, Wengzynowski, William, Eaton, W.Douglas

“…The Crown emerald veins are somewhat enigmatic, displaying characteristics that are common to emerald deposits of tectonic–hydrothermal origin and of igneous…”
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Fluid inclusions study of trapiche and non-trapiche rubies from the Mong Hsu Deposit, Myanmar by Giuliani, Gaston, Dubessy, Jean, Pignatelli, Isabella, Schwarz, Dietmar

“…The Mong Hsu ruby deposit in Myanmar is a marble-type deposit. It is well-known for attractive crystals with dark violet/blue to black cores and ruby rims, as…”
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Pink and red spinels in marble; trace elements, oxygen isotopes, and sources by Giuliani, Gaston, Fallick, Anthony E, Boyce, Adrian J, Pardieu, Vincent, Van Long Pham, Van Long Pham

“…The oxygen isotopic composition of pink to red and other colored spinels hosted by marbles worldwide have been combined with trace elements investigated by…”
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The role of evaporites in the formation of gems during metamorphism of carbonate platforms: a review by Giuliani, Gaston, Dubessy, Jean, Ohnenstetter, Daniel, Banks, David, Branquet, Yannick, Feneyrol, Julien, Fallick, Anthony E., Martelat, Jean-Emmanuel

“…The mineral and fluid inclusions trapped by gemstones during the metamorphism of carbonate platform successions are precious markers for the understanding of…”
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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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Recent advances in understanding the similarities and differences of Colombian euclases by Pignatelli, Isabella, Giuliani, Gaston, Morlot, Christophe, Rouer, Olivier, Claiser, Nicolas, Chatagnier, Pierre-Yves, Goubert, David

“…Colombian euclase is rare and associated with emerald in medium-temperature hydrothermal veins hosted by Lower Cretaceous black shales (BS). The original…”
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Age and origin of the tsavorite and tanzanite mineralizing fluids in the Neoproterozoic Mozambique metamorphic belt by Feneyrol, Julien, Giuliani, Gaston, Demaiffe, Daniel, Ohnenstetter, Daniel, Fallick, Anthony E, Dubessy, Jean, Martelat, Jean-Emmanuel, Rakotondrazafy, Amos Fety Michel, Omito, Edward, Ichang'i, Daniel, Nyamai, Christopher, Wamunyu, Abigail Wambui

“…The genetic model previously proposed for tsavorite- (and tanzanite-) bearing mineralization hosted in the Neoproterozoic Metamorphic Mozambique Belt…”
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Major zircon megacryst suites of the Indo-Pacific lithospheric margin (ZIP) and their petrogenetic and regional implications by Sutherland, Lin, Graham, Ian, Yaxley, Gregory, Armstrong, Richard, Giuliani, Gaston, Hoskin, Paul, Nechaev, Victor, Woodhead, Jon

“…Zircon megacrysts (± gem corundum) appear in basalt fields of Indo-Pacific origin over a 12,000 km zone (ZIP) along West Pacific continental margins…”
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Oxygen isotopes composition of sapphires from the French Massif Central: implications for the origin of gem corundum in basaltic fields by Giuliani, Gaston, Fallick, Anthony, Ohnenstetter, Daniel, Pegere, Guy

“…Alluvial and colluvial gem sapphires are common in the basaltic fields of the French Massif Central (FMC) but sapphire-bearing xenoliths are very rare, found…”
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