Search Results - "Hanchar, John M"

Dating the India–Eurasia collision through arc magmatic records by Bouilhol, Pierre, Jagoutz, Oliver, Hanchar, John M., Dudas, Francis O.

“…The Himalayan orogeny, a result of the collision of India and Eurasia, provides direct evidence of strain accommodation and large-scale rheological behavior of…”
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Genetic model of the El Laco magnetite-apatite deposits by extrusion of iron-rich melt by Keller, Tobias, Tornos, Fernando, Hanchar, John M., Pietruszka, Dorota K., Soldati, Arianna, Dingwell, Donald B., Suckale, Jenny

“…Magnetite-apatite deposits are important sources of iron and other metals. A prominent example are the magnetite lavas at the El Laco volcano, Northern Chile…”
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Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits by Pietruszka, Dorota K., Hanchar, John M., Tornos, Fernando, Wirth, Richard, Graham, Nathan A., Severin, Kenneth P., Velasco, Francisco, Steele-MacInnis, Matthew, Bain, Wyatt M.

“…The origin of magnetite-(apatite) iron deposits (MtAp) is one of the most contentious issues in ore geology with competing models that range from hydrothermal…”
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Retention of uranium in complexly altered zircon: An example from Bancroft, Ontario by Nasdala, Lutz, Hanchar, John M., Rhede, Dieter, Kennedy, Allen K., Váczi, Tamás

“…Mesoproterozoic (~ 1050 Ma; Stenian) zircon crystals from the Saranac Prospect, Bancroft, Ontario, contain up to ~ 1 wt.% U and ~ 0.15 wt.% Th and,…”
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Sm–Nd isotope systematics by laser ablation-multicollector-inductively coupled plasma mass spectrometry: Methods and potential natural and synthetic reference materials by Fisher, Christopher M., McFarlane, Christopher R.M., Hanchar, John M., Schmitz, Mark D., Sylvester, Paul J., Lam, Rebecca, Longerich, Henry P.

“…An improved method for precise and accurate in situ determination of Sm–Nd isotopes, with high spatial resolution, and high sample throughput, in light rare…”
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Magmatic Processes at Snæfell Volcano, Iceland, Constrained by Zircon Ages, Isotopes, and Trace Elements by Tenley J. Banik, Tamara L. Carley, Matthew A. Coble, John M. Hanchar, Justin P. Dodd, Gabriele M. Casale, Sean P. McGuire

“…Abstract We present the first zircon‐based U‐Pb geochronology, trace element concentrations, and O and Hf isotope compositions for Snæfell, an off‐rift volcano…”
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Partitioning behavior of trace elements between dacitic melt and plagioclase, orthopyroxene, and clinopyroxene based on laser ablation ICPMS analysis of silicate melt inclusions by Severs, Matthew J., Beard, James S., Fedele, Luca, Hanchar, John M., Mutchler, Scott R., Bodnar, Robert J.

“…Partitioning behavior of Sc, Ti, V, Mn, Sr, Y, Zr, Nb, Ba, La, Nd, Sm, Eu, Gd, Dy, Ho, Yb, Hf, and Pb between dacitic silicate melt and clinopyroxene,…”
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The magmatic to magmatic-hydrothermal evolution of the El Laco Deposit (Chile) and its implications for the genesis of magnetite-apatite deposits by Tornos, Fernando, Velasco, Francisco, Hanchar, John M

“…The geology and geochemistry of the El Laco iron oxide deposit (Central Andes, Chile) support a genesis related to the ascent, degassing, and subvolcanic…”
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Guidelines for reporting zircon Hf isotopic data by LA-MC-ICPMS and potential pitfalls in the interpretation of these data by Fisher, Christopher M., Vervoort, Jeffery D., Hanchar, John M.

“…High quality analytical data are essential for the development of sound scientific interpretations. To ensure the quality of the data published in Chemical…”
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Mineral chemistry of magnetite from magnetite-apatite mineralization and their host rocks: examples from Kiruna, Sweden, and El Laco, Chile by Broughm, Shannon G., Hanchar, John M., Tornos, Fernando, Westhues, Anne, Attersley, Samuel

“…Interpretation of the mineralizing environment of magnetite-apatite deposits remains controversial with theories that include a hydrothermal or magmatic origin…”
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Formation of magnetite-(apatite) systems by crystallizing ultrabasic iron-rich melts and slag separation by Tornos, Fernando, Hanchar, John M., Steele-MacInnis, Matthew, Crespo, Elena, Kamenetsky, Vadim S., Casquet, Cesar

“…Magnetite-(apatite) ore deposits are interpreted as being formed by the crystallization of iron-rich ultrabasic melts, dominantly generated by the interaction…”
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The role of the subducting slab and melt crystallization in the formation of magnetite-(apatite) systems, Coastal Cordillera of Chile by Tornos, Fernando, Hanchar, John M., Munizaga, Rodrigo, Velasco, Francisco, Galindo, Carmen

“…The Mesozoic magnetite-(apatite) deposits of the Coastal Cordillera of Chile are interpreted as the product of the crystallization of oxidized iron-rich melts…”
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The Montecristo mining district, northern Chile: the relationship between vein-like magnetite-(apatite) and iron oxide-copper–gold deposits by Mateo, Laura, Tornos, Fernando, Hanchar, John M., Villa, Igor M., Stein, Holly J., Delgado, Antonio

“…The Montecristo district, northern Chile, is one of the few places worldwide where there is a direct relationship between magnetite-(apatite) (MtAp)…”
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Differentiating tourmaline species via chemistry and reflectance spectroscopy at the Giant copper porphyry deposit and associated tourmaline breccia pipes; testing tourmaline as a mineral vector by Fischer, Bill T, Marshall, Daniel D, Hanchar, John M, Riley, Dean, Hiebert, Scott

“…The A.M. breccia is part of the Giant Copper porphyry deposit in southern British Columbia. It is the only well-defined zoned tourmaline breccia pipe in the…”
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Rutile solubility in NaF–NaCl–KCl-bearing aqueous fluids at 0.5–2.79 GPa and 250–650 °C by Tanis, Elizabeth A., Simon, Adam, Zhang, Youxue, Chow, Paul, Xiao, Yuming, Hanchar, John M., Tschauner, Oliver, Shen, Guoyin

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Plešovice zircon — A new natural reference material for U–Pb and Hf isotopic microanalysis by Sláma, Jiří, Košler, Jan, Condon, Daniel J., Crowley, James L., Gerdes, Axel, Hanchar, John M., Horstwood, Matthew S.A., Morris, George A., Nasdala, Lutz, Norberg, Nicholas, Schaltegger, Urs, Schoene, Blair, Tubrett, Michael N., Whitehouse, Martin J.

“…Matrix-matched calibration by natural zircon standards and analysis of natural materials as a reference are the principle methods for achieving accurate…”
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New constraints on the timing of host-rock emplacement, hydrothermal alteration, and iron oxide-apatite mineralization in the Kiruna District, Norrbotten, Sweden by Westhues, Anne, Hanchar, John M, Whitehouse, Martin J, Martinsson, Olof

“…High spatial resolution zircon U-Pb geochronological data obtained directly on the Kiirunavaara iron oxide-apatite (IOA) deposit, related orebodies, and host…”
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K-feldspar hygrochronology by Villa, Igor M., Hanchar, John M.

“…The significance of the multi-isotopic record preserved in K-feldspars is assessed on samples from the Aar metagranite, Central Alps, Switzerland having very…”
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Solubility of manganotantalite, zircon and hafnon in highly fluxed peralkaline to peraluminous pegmatitic melts by Van Lichtervelde, Marieke, Holtz, Francois, Hanchar, John M.

“…The behavior of tantalum and zirconium in pegmatitic systems has been investigated through the determination of Ta and Zr solubilities at manganotantalite and…”
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Tracking trachyte on the Roman routes: Provenance study of Roman infrastructure and insights into ancient trades in northern Italy by Germinario, Luigi, Zara, Arturo, Maritan, Lara, Bonetto, Jacopo, Hanchar, John M., Sassi, Raffaele, Siegesmund, Siegfried, Mazzoli, Claudio

“…Roman colonization of northern Italy during the late Republican Age brought about significant building activity in the newly acquired territories, involving…”
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