 | | Journal (article/letter/editorial) | | the low-sulfidation epithermal Emperor gold deposit, Vatukoula, Fiji D. W. Pals and P. G. Spry Department...The epithermal, low sulfidation Emperor gold telluride deposit in Fiji, hosted by Late Miocene-Early Pliocene...western flank of the Tavua Caldera. Gold is largely in the form of ‘‘invisible’’ gold in arsenian pyrite...pyrite but 10 to 50% of gold is in the form of precious metal tellurides. Gold mineralization occurs in steeply...where the flatmake intersects steep structures. Gold-rich tellurides preceded the formation of silver-rich |  | | Report (issue) | | Naumannite Ag2 Se c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic, pseudocubic...umangite, eucairite, argentian tetrahedrite, argentian gold, pyrite, chalcopyrite. Distribution: In Germany...Co., and in the L-D mine, Wenatchee, Chelan Co., Washington; at the De Lamar mine, Silver City district...July mine, Yankee Fork, Custer Co., Idaho; in Nevada, large crystals in the Ken Snyder mine, Gold Circle...Kidd Creek mine, near Timmins, Ontario, Canada. At Guanajuato, Mexico. From the Pacajake mine, Hiaco, 24 |  | Kuzhuget, Renat V., Ankusheva, Natalia N., Pirajno, Franco, Mongush, Andrey A., Butanaev, Yuri V., Suge-Maadyr, Nadezhda V. (2022) The Ulug-Sair Gold Occurrence (Western Tuva, Russia): Mineralogy, Ore Genesis, and S-O Isotope Systematics. Minerals, 12 (6) 712 doi:10.3390/min12060712 | Journal (article/letter/editorial) | | minerals Article The Ulug-Sair Gold Occurrence (Western Tuva, Russia): Mineralogy, Ore Genesis, and...Butanaev, Y.V.; Suge-Maadyr, N.V. The Ulug-Sair Gold Occurrence (Western Tuva, Russia): Mineralogy, Ore...origin remains debated. Mineralization consists of gold–sulfide–quartz veins in the host sedimentary rocks...early gold–sulfide–quartz with pyrite, chalcopyrite, galena, gold, and electrum; and a late gold–tell...salinity of 0.18–6.1 wt % NaCl eq. at 200–400 ◦ C. Gold-bearing mineral assemblages were formed at P ~ 0 |  | Plotinskaya, O. Yu., Kovalenker, V. A., Seltmann, R., Stanley, C. J. (2006) Te and Se mineralogy of the high-sulfidation Kochbulak and Kairagach epithermal gold telluride deposits (Kurama Ridge, Middle Tien Shan, Uzbekistan) Mineralogy and Petrology, 87 (3) 187-207 doi:10.1007/s00710-006-0130-z | Journal (article/letter/editorial) | | high-sulfidation Kochbulak and Kairagach epithermal gold telluride deposits (Kurama Ridge, Middle Tien Shan...accompanied by an increase in the Ag content of native gold that correlates with a decrease in temperature,...pH. Introduction Most volcanic-hosted epithermal gold deposits (White and Hedenquist, 1990; Bonham, 1986;...epithermal Au–Ag–Te–Se deposits (Fig. 1). The total gold resources of this region exceed 2000 tonnes (Islamov...al., 1999), which makes this region a worldclass gold province. The estimated reserves of the Kochbulak |  | | Journal (article/letter/editorial) | | minerals Article Types of Tellurium Mineralization of Gold Deposits of the Aldan Shield (Southern Yakutia,...mineralization of gold ore deposits of the Aldan Shield are systematized and generalized. The gold content is...occurred at the very late stages of the generation of gold mineralization of all existing types of metasomatic...Au-Ag-Te. Gold is not only in an invisible state in sulfides and in the form of native gold of different...calaverite, sylvanite, krennerite and petzite. In the gold deposits of the Aldan Shield, three mineral types |  | | Report (issue) | | Fluid-inclusion and geochemical studies at the Emperor gold mine, Fiji; Unpub. Ph.D. dissertation, University...Ashley, R. P., 1982, Occurrence model for enargite-gold deposits, in Erickson, R. L., ed., Characteristics... R. P., and Keith, W. J., 1976, Distribution of gold and other metals in silicified rocks of the Goldfield...general description of the setting of the McLaughlin gold deposit discovered much later.) Baas Becking,...Pleistocene high silica rhyolites of the Coso Volcanic Field, Inyo County, California; Journal of Geophysical |  | | Report (issue) | | 1986, Geology and development of the Hishikari mine: Mining Geology, v. 36 (2), no. 196, p. 117. Adams...Fluid-inclusion and geochemical studies at the Emperor gold mine, Fiji: Unpub. Ph.D. dissertation, University...Ashley, R. P., 1982, Occurrence model for enargite-gold deposits, in Erickson, R. L., ed., Characteristics... R. P., and Keith, W. J., 1976, Distribution of gold and other metals in silicified rocks of the Goldfield...general description of the setting of the McLaughlin gold deposit-discovered much later.) Baas Becking, L |  | | Journal (article/letter/editorial) | | from hundreds of localities worldwide, and unlike gold, silver is quite a reactive element, forming more...to be the third metal widely utilized by humans (gold and copper were the first). The earliest known siIver...The Iliad. In ancient times silver was rarer than gold. This probably reflects the fact that the earliest...in the ancient world, was considerably rarer than gold. Chlorargyrite appears to have been the fvst silver...King Solomon is said to have received shipments of gold and silver from “Tharshish and the Isles,” thought |  | | Journal (article/letter/editorial) | | Manuscript Invisible gold in arsenian pyrite from the high-grade Hishikari gold deposit, Japan: Significance...K. Shimada, Invisible gold in arsenian pyrite from the highgrade Hishikari gold deposit, Japan: Significance...pertain. Invisible gold in arsenian pyrite from the high-grade Hishikari gold deposit, Japan: Significance...Hishikari deposit, which has produced more than 224 t of gold since 1985 (as of March 2016), is world-famous for...Microanalyses of arsenian pyrite from the Hishikari gold deposit by SIMS and EPMA revealed that Au concentrations |  | | Journal (article/letter/editorial) | | controls on the silver content (fineness) of gold in gold-silver deposits Gregg W. Morrison, William J...controls on the silver content (fineness) of gold in gold-silver deposits. Ore Geol. Rev., 6: 333-364...that the gold fineness model of Fisher (1945) can be updated and applied to a wide range of gold-mineralised...or range of deposits averages and total range of gold fineness values as follows: Archaean 940 (780-1000)...calculations indicate that in all these environments, gold and silver form the same aqueous species with AgCI~- |  | | Book (volume) | | Jixiang Sui Geochemistry of Tourmaline from the Laodou Gold Deposit in the West Qinling Orogen, Central China:...Polufuntikova and Lyudmila Yu. Kryuchkova Disseminated Gold–Sulfide Mineralization in Metasomatites of the Khangalas...Kardashevskaia Types of Tellurium Mineralization of Gold Deposits of the Aldan Shield (Southern Yakutia,...Bukhanova, Galina A. Palyanova and Valery M. Chubarov Gold Mineralization at the Maletoyvayam Deposit (Koryak...Borovikov, Nikolay Karmanov and Sergei Kuznetsov Native Gold in the Chudnoe Au-Pd-REE Deposit (Subpolar Urals |  | | Report (issue) | | "Whatever is gold does not glitter. A gentle radiance belongs to the Friedrich Nietzsche, The Wanderer...Front cover top: 5.1 cm high from Eagle's Nest mine in Placer County, Caifornia, USA Collection Marlin...photo Left: A wall of gold bricks in the Federal Reserve Bank of New York's gold vault Photo Robert Gambee...Crystallized gold from Canada Private collection; Jeff Scovil photo extraLapis English No. 5 Gold The Noble...edition in the English language of extraLapis No. 2 Gold with permission of Christian Weise Verlag, Munich |  | Morishita, Yuichi, Hammond, Napoleon Q., Momii, Kazunori, Konagaya, Rimi, Sano, Yuji, Takahata, Naoto, Ueno, Hirotomo (2019) Invisible Gold in Pyrite from Epithermal, Banded-Iron-Formation-Hosted, and Sedimentary Gold Deposits: Evidence of Hydrothermal Influence. Minerals, 9 (7) 447 doi:10.3390/min9070447 | Journal (article/letter/editorial) | | Invisible Gold in Pyrite from Epithermal, Banded-Iron-Formation-Hosted, and Sedimentary Gold Deposits:...July 2019 Abstract: “Invisible gold” in pyrite is defined as an Au solid solution of...Kalahari Goldridge banded-iron-formation-hosted gold deposit, and Au in pyrrhotite may sometimes exist...concentrations in pyrite from the Witwatersrand gold field range from 0.02 to 1.1 ppm and from 8 to 4000...the genesis of the deposits. Keywords: invisible gold; arsenic; pyrite; epithermal; banded iron formation; |  | | Journal (issue) | | :Refugio Jlline Famous mineral localities: The Refugio mine, Municipio de Choix, Sinaloa, Mexico .............Front Cover Smithsonite, 4 cm wide, from the Refugio mine, Choix, Sinaloa, Mexico. William Dameron collection;...that were collected and stored more carefully. The mine is still being actively worked today, as the city...6) San Pedro Corralitos, Amatitlan, San Francisco mine Mexico V.· (2008, vol. 39, no. 6) History, Milpillas...minerals (under the company name Xtal). The Refugio mine may not sound familiar at first, but that's because |  | | Book | | table, surrounded by minerals from [the] Ojuela [mine].” Saturday Evening Post, 1927: George Kunz, mineral...cluster of aguilarite crystals from the San José mine, Guanajuato, Mexico, in the Terry Wallace collection...species the size of a nut than in a rich nugget of gold or various quintales [a quintal was a hundred pounds]...economically valuable metals were found, including gold, copper, zinc, and lead, and scores of mining localities...article, George Kunz described his visit to an opal mine, saying: 7 Introduction They had been working |  | | Journal (article/letter/editorial) | | of the coupled behavior of gold and silver in hydrothermal processes: Gold fineness, Au/Ag ratios and their... Rickard Keywords: Hydrothermal gold deposits Ore geochemistry Gold fineness Au(Ag)-bearing pyrite Thermodynamic...modeling Au/Ag ratios a b s t r a c t An estimation of gold fineness deposited from aqueous sulphide–chloride...of hydrothermal gold deposits of different types are summarized. Wide ranges of gold fineness and low...ore-forming solutions (types I–III). High fineness gold and high values of (Au/Ag)ore ratio of Au–Te, Au–As |  | | Book | | R. (1919) On the origin of Kuroko of the Kosaka mine. J. Geol. Soc. Japan, 26, 107-132 (in Japanese)...model ..... ............................. 1.4.6.6. Gold precipitation due to mixing of fluids in epithermal................ 1.5.1. Paleogeography and stress field ...................................... 1S.2. Volcanic........................................... 1.6.3. Gold-quartz vein-type deposits (mesothermal-hypothermal...and geochemistry ...................... 1.6.3.2. Gold-quartz vein-type deposits in Yamizo Mountains, central |  | | Journal (issue) | | Beryozovsk, Adun-Chilon, and the Zmeinogorskii mine appear to be represented the most completely and...mines), malachite (the Gumeshevskii mine), crocoite (the Beryozovskii mine), jasper (Orsk), and others. Large...the museum is that of J .K. Freiesleben, a Saxon mine broker (1774-1846). It contains minerals from classic...collected by museum staff members during their field trips. In addition to minerals from the abovementioned...from the Demidov family, the former owners o f the mine) are also present here. Jasper and rhodonite end |  | | Book | | p85 para 3, end of line 9 add “further mention of gold." _ 1 QOLD in the Counties Of Cornwall and...Geological Background 6 Gold Occurrences 15 Early Mining Methods and Analysis 17 Gold Bearing Localities...District 79 1 1 Exmoor District 82 Gold Panning 89 Gold in Museums 92 Glossary of terms 96 ...3 Gold Locations Redruth-Truro. Map 4 Gold Locations Helston-Falmouth. 38 Map 5 Placer Gold Locations...Ladock-Grampound. 43 Map 6 Gold Locations Wadebridge-Port Isaac. 54 Map 7 Gold Locations East Bodmin. |  | | Book | | ! mm A FIELD GEMS •* m a GUIDE AND TO MINERALS THE OF ; M EXICO mm mm ■..r:. _»p By PAUL...WILLARD JOHNSON V’ wj4J SbSJk? G E1ML E© ® K FIELD GUIDE to the GEMS and MINERALS of MEXICO (Exclusive...Eulalia District....... El Potosi Mine............. San Antonio Mine....... Cusihuiriachic District................................. Minerals of Ojuela Mine .... . Velardena District.........................Guanajuato District ..................... El Sanlin Mine......................... San Miguel de Allende |  | | Book | | 1umankind since prehistoric times such as quartz 1nd gold, but also ~minerals first described quite :ecently...Crystals up to 140mm (5½ in) long occurred in the Ray mine and in Bisbee, Arizona, USA. Very fine spinel-law...electronics, electrical engineering, ingredient in gold alloys. 9 Silver Ag CUBIC ••• Properties: C...100 mm (4 in) long, come also from the San Genaro Mine in Huancavelica and Uchucchaqua, Peru. New finds...electronics. Gold, 48 mm, El Dorado, California, US.A. Gold, 68 mm, Eagle's Nest Mine, California, US |  | | Book | | humankind since prehistoric times such as quartz and gold, but also minerals first described quite recently...Crystals up to 140mm (5'A in) long occurred in the Ray mine and in Bisbce, Arizona, USA. Very fine spincl-law...electronics, electrical engineering, ingredient in gold alloys. f I Silver Ag CUBIC • • • Properties:...100 mm (4 in) long, come also from the San Gcnaro Mine in Huancavclica and Uchucchaqua, Peru. New finds...electronics. Gold, 411 mm. El Dorado, California. U.S.A. Gold Au CUBIC • • Properties: C gold-yellow; |  | | Journal (issue) | | Advertising Manager Thomas P. Moore Tpmoorel@cox.net A gold specimen from the Spanish Dry Diggings, Eldorado...EUCLASE with Albite, 11.2 cm, from the La Marina mine, Muzo District, Boyaca Department, Colombia. See...mineral room wall. And in 2016 we began presenting gold medallions-large pins with a magnetic clasp--that...While other children struggled mightily to avoid field trips and family outings to the purportedly dusty...specimens. ~ How, after being inactive in this field for several years, we have accumulated a line stock |  | | Book | | pleased about the growing interest in my special field of study. I t was my idea to start the work for...were collected by the writer himself during his field trips and journeys. The Locality Index has again...form of this book will also win new friends in the field of ore-microscopy. A prerequisite is always t h...accomplished, of possible means by which problems in this field are to be handled, and of some aids to the work...Quartz alone in just one group of ore deposits (the gold-quartz deposits), and he will not expect t h a t |  | | Report (volume) | | success. An example might be the seeking of additional gold nuggets in a stream in which one nugget had already...constituting fossil geothermal systems; and (3) field and laboratory investigations clearly show that...U-Au, by Dan L. Mosier 249 Descriptive model of gold on flat faults, by Bruce A. Bouley 251 248 Deposits...Tonnages of komatiitic Ni-Cu deposits 20 Nickel and gold grades of komatiitic Ni-Cu deposits 21 PGE grades...grades of polymetallic replacement deposits 104 Gold grades of polymetallic replacement deposits 104 |
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