 | | Journal (article/letter/editorial) | | deposits: constraints from the Broken Hills deposit, Hauraki Goldfield, New Zealand Helen A. Cocker & Jeffrey...# Springer-Verlag 2012 Abstract The 7.1 Ma Broken Hills adularia-sericite Au–Ag deposit is currently...epithermal deposit in the Hauraki Goldfield of New Zealand. The opaque minerals include pyrite, electrum...the Hauraki Goldfield and elsewhere worldwide. Broken Hills ores also contain the less common minerals aguilarite...aguilarite (Ag4SeS), naumannite (Ag2Se), petrovskaite (AuAgS), uytenbogaardtite (Ag3AuS2), fischesserite |  | | Journal (article/letter/editorial) | | native gold are uytenbogaardtite (Ag3AuS2) or petrovskaite (AgAuS), or a mixture of acanthite (Ag2S) with...with uytenbogaardtite or uytenbogaardtite with petrovskaite. In the ore samples from the Khopto and Ulakhan...forms after gold of fineness above 380‰, whereas petrovskaite, above 650‰. We propose that the fineness of...forecasting presence of uytenbogaardtite or petrovskaite, or a mixture of acanthite with uytenbogaardtite...uytenbogaardtite or uytenbogaardtite with petrovskaite in sulfide ores at Au-Ag epithermal, Au-skarn, Au-Cu volcanic-hosted |  | | Journal (article/letter/editorial) | | compositions of Au-Ag alloys and compositions of new phases formed at the contact Au-Ag alloys and pyrite...pyrite at 500 °C Initial Au-Ag Compositions of new phases alloys (NAu ‰) Au-Ag alloys (NAu ‰) Au-Ag sulfides...and Ag concentrations along the reaction zones and new phases found between pyrite and Au-Ag alloys in each...and uytenbogaardtite or uytenbogaardtite and petrovskaite, according to Ag2S–Au2S phase diagram (Folmer...Au-Ag sulfides (acanthite, uytenbogaardtite, and petrovskaite) and higher fineness Au-Ag alloys. The presence |  | Tauson, Vladimir, Kravtsova, Raisa, Makshakov, Artem, Lipko, Sergey, Arsent’ev, Kirill (2017) Contrasting Surficial Composition of Native Gold from Two Different Types of Gold Ore Deposits. Minerals, 7 (8) 142 doi:10.3390/min7080142 | Journal (article/letter/editorial) | | gold sulfides—uytenbogaardtite (Ag3 AuS2 ), petrovskaite (AgAuS), their conglomerates, as well as a mixture...conditions—Kvartsevaya Sopka (Northern Okhotsk Region, Russia and differing in in formation conditions—Kvartsevaya...Okhotsk SeaSea Region, Magadan Oblast) and Amurskie Daiki (Eastern Trans-Baikal Region, Zabaykalsky Krai)...Oblast) and Amurskie Daiki (Eastern Trans-Baikal Region, Zabaykalsky Krai) (Figure 1).1). Figure 1. Location...the adularia-sericite epithermal Broken Hills deposit in New Zealand. The authors concluded that uytenbogaardtite |  | | Report (issue) | | white areas). Sample is from the Buckskin National Mine, Humboldt County, Nevada. Photograph by Peter Vikre...............................................Q26 Mine Waste Characteristics.............................showing selenium concentrations in coal samples, by region of the United States.............................earth may lead to new (or unconventional) sources of selenium, the discovery of new methods of extraction...extraction, and new technologies for minimizing the transfer of selenium from rock to biota, so to protect |  | | Book (edition) | | completely revised and updated with a wealth of new information and features. The second edition of the...alphabetical entries, 1000 of which are entirely new e 240 new color photographs, mostly of large specimens...specimens, as well as 104 black-and-white photographs 45 new crystal drawings of rare species the most complete...distinguished group of authors in the light of new research and important new technological developments. The second...Morocco; (center, left) wulfenite, San Francisco mine, Sonora, Mexico; (center) ameihyst, Veracruz, Mexico; | | | Book (edition) | | completely revised and updated with a wealth of new information and features. The second edition of the...alphabetical entries, 1000 of which are entirely new • 240 new color photographs, mostly of large specimens...as well as 104 black-and-white photographs • 45 new crystal drawings of rare species • the most complete...distinguished group of authors in the light of new research and important new technological developments. The second...Morocco; (center, left) wulfen ite San Francisco mine, Sonora, Mexico; (center) amethyst, Veracruz, Mexico; |  | | Report (issue) | | were being used by society. Today, discovery of new uses for an increasing number of elements is enabling...systems have all been possible through the use of new mineral materials. As the importance and dependence....B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agency’s...production, U.S. apparent consumption, and U.S. mine production of antimony from 1900 to 2012............................F2 Graph showing world cobalt mine and refinery production and apparent consumption |
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