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Showing 1 to 9 of 9 for “"ore fluid"”.
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Prediction of Mississippi-Valley type ore fluid metal concentrations from solid solution metal concentrations in ore-stage minerals
… is knowledge of their concentrations in the ore fluids. Recent research aimed at determining the concentrations of Pb, Zn, and Ba in the ore fluids that formed the MVT deposits of the U.S. midcontinent, the type examples for the MVT deposit class, has focused on using LA-ICPMS to analyze …
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Silicification across the Betze-Post Carlin-type gold deposit: Clues to ore fluid properties and sources, Northern Carlin Trend, Nevada
Ore fluid properties and sources at the Betze-Post deposit, the largest Carlin-type gold system in the world (∼49 million ounces Au), are not well understood. To improve knowledge of ore fluids, the geochemical, textural, and fluid inclusion characteristics of ore, late-ore, and post-ore quartz …
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Structural geology and geochemistry of sedimentary rock-hosted gold in the eastern Nadaleen Trend, Yukon Territory, Canada
… to have acted as an aquitard below which ore fluid migrated updip. Within the eastern Nadaleen Trend, ore fluid migration was concentrated into hinge zones of SSW-plunging anticlines, which may have acted as local fluid conduits. One of the Au zones, the Conrad zone, is situated in the …
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Fluid Inclusion Evidence for Ore-Forming Solutions: Phoenixville, Audubon and New Galena Mine Districts, PA
… investigated by microthermometric analysis of fluid inclusions in sphelerite, dolomite and quartz. The results obtained from primary and pseudosecondary inclusions in spherelite indicate that the ore was deposited by a sodium rich brine of moderate salinity (11-14 equivalent wt. % NaCl) at …
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Fluid evolution during metamorphism and uplift of the massive sulfide deposits at Ducktown, Tennessee, U.S.A.
… and underwent little retrograde exchange. Fluid inclusion and petrologic data do not support the previous interpretation that low δ¹⁸O zones near orebodies are synmetamorphic, rather, a premetamorphic origin is indicated. Integrated fluid/rock ratios were low enough during and after …
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Time-Space Relationships between Sediment-Hosted Gold Mineralization and Intrusion-Related Polymetallic Mineralization at Kinsley Mountain, NV
… by diagenetic or hydrothermal pyrite cores surrounded by euhedral, oscillatory zoned Au-bearing arsenian-pyrite rims. Locally, pyrite cores are surrounded by stibnite or tennantite-tetrahedrite, which are enveloped by arsenian-pyrite rims. Gold strongly correlates (correlation …
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Gold mineralization in the Um El Tuyor area, South Eastern Desert, Egypt
… and advanced) is proposed for the Um El Tuyor ore-forming hydrothermal system, on basis of the field and microscopic observations and the electron microprobe data. The initial stage involved hydrolysis of the wallrocks in presence of a near acid fluid, whose pH was buffered by the wallrock …
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Petrography, geochemistry and stable isotope characteristics of the Navachab gold deposit, Namibia
… eine Act-Qtz-Alteration während in Marmoren und Kalksilikaten eine Grt-Cpx-Kfs-Qtz-Alteration ausgebildet sein kann. Das Auftreten von nebengesteinsspezifischen sowie negengesteinsunabhängigen Alterationsparagenesen kann durch unterschiedliche Fluid/Gesteinsverhältnisse erklärt werden. …
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Rb-Sr Alter und Sr-Pb Isotopencharakteristik von Gangmineralisationen in paläozoischen Gesteinen am Nordrand des linksrheinischen Schiefergebirges (Raum Stolberg-Aachen-Kelmis) und Vergleich mit den rezenten Thermalwässern von Aachen-Burtscheid
… were studied in the northern Eifel area and its foreland. The focus was put on microstructure, geochemistry and isotopic composition to characterize discrete fluid flow events and to date their generations. Samples from the geothermal well RWTH – 1 representing Variscan vein mineralizations, from …