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Evidence for an Intrabasinal Source and Multiple Concentration Processes in the Formation of the Carbon Leader Reef, Witwatersrand Supergroup, South A... 14 Aug 2013 | 12:27 am
Laser ablation-inductively coupled plasma-mass spectrometer (LA-ICP-MS) trace element maps of pyrite and gold from the Carbon Leader Reef in the Witwatersrand basin provide new evidence that a signifi...
Pyrite Zoning as a Record of Mineralization in the Ventersdorp Contact Reef, Witwatersrand Basin, South Africa 14 Aug 2013 | 12:27 am
The Archean metasedimentary succession of the Witwatersrand basin, South Africa, hosts the largest Au deposit in the world. Gold mineralization is mostly concentrated in conglomerate horizons, or "ree...
Arsenopyrite-Pyrite Association in an Orogenic Gold Ore: Tracing Mineralization History from Textures and Trace Elements 14 Aug 2013 | 12:27 am
Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) spot analysis and element mapping coupled with high-resolution focused ion beam-scanning electron microscopy (FIB-SEM) imaging h...
Mapping the Chemical Composition of Nickel Laterites with Reflectance Spectroscopy at Koniambo, New Caledonia 14 Aug 2013 | 12:27 am
Reflectance spectroscopy was applied as a sampling tool for deriving compositional data of nickel laterites in the Koniambo deposits of New Caledonia. The aim of the work was to test the feasibility o...
The Kamoa Copper Deposit, Democratic Republic of Congo: Stratigraphy, Diagenetic and Hydrothermal Alteration, and Mineralization 14 Aug 2013 | 12:27 am
The Kamoa copper deposit is located in the Katanga Province of the southern Democratic Republic of Congo outside of the area previously considered prospective for large copper deposits. With a 1% Cu c...
The Mesoproterozoic Copperwood Sedimentary Rock-Hosted Stratiform Copper Deposit, Upper Peninsula, Michigan 14 Aug 2013 | 12:27 am
Copperwood is located in Gogebic County, Upper Peninsula, Michigan, within the Porcupine Mountains copper district. It was discovered in 1956 and, in 2008, Orvana Minerals Corp began exploration and d...
Porphyry Cu-Mo Stockwork Formation by Dynamic, Transient Hydrothermal Pulses: Mineralogic Insights from the Deposit at Butte, Montana 14 Aug 2013 | 12:27 am
The systematic distribution of vein and alteration mineral assemblages in porphyry Cu deposits largely arises from changes in the temperature and pressure of fluids that traversed fractures throughout...
The Butte Magmatic-Hydrothermal System: One Fluid Yields All Alteration and Veins 14 Aug 2013 | 12:27 am
Mine exposures and deep drilling reveal that the Butte porphyry Cu-Mo ores occur in two, internally zoned domes with alteration assemblages containing biotite, K-feldspar, sericite, and chlorite. A th...
Structural Geologic Evolution of the Butte District, Montana 14 Aug 2013 | 12:27 am
The Butte district contains two porphyry Cu-Mo deposits and the younger zoned Main stage base metal lode deposits that formed in the period from 66 to 62 Ma, synchronous with Laramide compressional th...
The Oued Belif Hematite-Rich Breccia: A Miocene Iron Oxide Cu-Au-(U-REE) Deposit in the Nefza Mining District, Tunisia 14 Aug 2013 | 12:27 am
The upper Miocene Oued Belif ring-shaped breccia is located in the Nefza mining district of northern Tunisia, within the internal zone of the collisional Alpine Maghrebide belt. It encloses chaotic Tr...
