 | Selby, David, Creaser, Robert A., Stein, Holly J., Markey, Richard J., Hannah, Judith L. (2007) Assessment of the 187Re decay constant by cross calibration of Re–Os molybdenite and U–Pb zircon chronometers in magmatic ore systems. Geochimica et Cosmochimica Acta, 71 (8) 1999-2013 doi:10.1016/j.gca.2007.01.008 | Journal (article/letter/editorial) | | Norges geologiske undersøkelse, 7491 Trondheim, Norway Received 28 February 2006; accepted in revised...Canadag Tepasto, Finlandh Øvre Myssa, Norwayi Antoinette, Norwayj Ragunda, Swedenk Salobo, Brazill,m ...Øvre Myssa, Gursli district, Rogaland, Norway Southern Norway is characterized by widespread veinstyle...for nearly a century (Bugge, 1963). The Øvre Myssa mine in the Gursli district is a few hundred meters from...(Table 2). A.7. ca. 1735 Ma, Antoinette, SE Norway The mylonite–hosted Antoinette Cu–Mo–(Au) prospect is located |  | | Journal (article/letter/editorial) | | crustal rocks in southwest Sweden and southern Norway and is host to the deposits in this study (Fig...complex and Western Fennoscandian Shield CN Antoinette 0 Eidsvoll Segme nt VK Lake Vänern tter...km High pressure granulite-facies and garnet amphibolite-facies rocks Mesoproterozoic sandstone Undifferentiated...comprising southern Sweden and extreme southeastern Norway. Lake Mjøsa, mentioned in the text, is just off...segments, which are primarily at greenschist-amphibolite grade. In fact, the southern part of the Eastern |  | | Journal (issue) | | high-profile sale of items that once belonged to Marie Antoinette. 380 Unique Raindrop Pattern of Turquoise from...in which 10 of the lots once belonged to Marie Antoinette. Next, Ling Liu and colleagues from the Gemmological...(figure 2). Mingora, Pakistan’s earliest emerald mine, was discovered in 1958 (Khan, 2018). Initially...to the present, these four mines and the Shamozai mine have been taken over by different private companies...emerald crystal specimen in matrix from the Mingora mine in Swat Valley. The emerald crystal measures about |  | | Book (volume) | | Where & How to Djg, Pan and Mine Your Own Gen1s & Minerals Where & I-low to 1-Iunt for Treasure From...yourself. Happy digging!" -from the Prefaceby Antoinette L. Mat/ins, P.G. This book is for: • Rockhounds...vacation stops at a roadside "dig your own" gem mine. Junior finds a sapphire the size of a p ach and...) Many an unsuspecting tourist has stopped at a mine to try his or her luck and become a rockhound for...GUIDES TO THE U.S.A. W11ere & How to Dig, Pan, and Mine Your Ow11 Gems & Minerals VOLUME 3: SOUTHEAST STATES |  | | Journal (issue) | | 12"H Ships in two boxes (motor separately) from Norway, MI. Free Catalogs • 1 HP motor • Integrated...ME Kingsley North, Inc. P.O. Box 216: Dept 3, Norway, MI 49870-0216 Phone: 800-338-9280 www.kingsleynorth...Parting Shot.................................82 By Antoinette Rahn Rock&Gem (ISSN 0048-8453, USPS 486290)...play-of-colors sitting atop a quartz matrix, West Colusa Mine, Butter Mining District, Silver Bow County, Montana...courtesy of Jim Brace-Thompson; thunderegg from Oregon mine, courtesy Lori Coleman, owner of Spanish Stirrup |  | | Journal (article/letter/editorial) | | Hyperlte j""",,-:.l Skarn and calcareous rocks. Amphibolite. ~ QUilrlzll«. o 3 4 I I , 5km 4~ Skar...st0rste og viktigste omradet. Hovedfeltet ligger 500 m nord for S0rsvann og dekker 600 x 600 meter. Litt over...drev i 1906-1907 pnilvedrift i Gyldenl0we og Antoinette gruver. AS Braastad gruver drev de samme gruver...v ed Naturhistorie-Selskabet, "da min Handel og mine Forrettninger fornrervrerende Tid saa ti/tager,...datolitt i botryoidal form Bucklandite NeskieJ Mine (en av = synonym for allanitt Neskilgruvene (Ml2lrefjcer |  | Leclerc, F., Harris, L. B., Bedard, J. H., van Breemen, O., Goulet, N. (2012) Structural and Stratigraphic Controls on Magmatic, Volcanogenic, and Shear Zone-Hosted Mineralization in the Chapais-Chibougamau Mining Camp, Northeastern Abitibi, Canada(,) Economic Geology, 107 (5) 963-989 doi:10.2113/econgeo.107.5.963 | Journal (article/letter/editorial) | | grams per metric ton, — = no data 1 The Lemoine Mine also produced 72,066 t of Zn at an average grade...(Anorthosite, gabbro, pyroxenite) Shear Zones A: Antoinette C: Croteau Plutons F: Faribault CB: Chibougamau...Regional E-W deformation corridors (e.g., Faribault, Antoinette, Lac Sauvage, Kapunapotagen, and Guercheville...age of 2680 Ma for mineralization at the Norbeau Mine (Thorpe et al., 1984) that is controlled by D2 structures...structures (Dubé, 1990) and 2680 to 2690 Ma ages for amphibolite facies metamorphism of mafic enclaves in a tonalite |  | | Journal (issue) | | Bench Tips ...........................18 By Antoinette Rahn R&G Kids ................................ounce lots $600.00. Darlene and I with our guides, mine foreman and guards at the Welo opal mines in Ethiopia...ROCKNGEM.COM BOB JONES Senior Consulting Editor ANTOINETTE RAHN Managing Editor SHAWN STIGSELL Graphic Design...to share. — John Carver EDITORIAL SUBMISSIONS ANTOINETTE RAHN (715) 721-0532 arahn@beckett.com ADVERTISING...without notice. C MARCH 2020 3 ROYAL PEACOCK OPAL MINE Dig your own Virgin Valley Fire Opals ALL YOU FIND |  | | Journal (issue) | | Monte Bianco Domenico Pass Libiola Hill Gallinaria Mine (Casarza Ligure) Casa di Bonelli (Monte Tregin)...subjected to several phases of folding and suffered amphibolite to granulite facies metamorphism, with localized...Samples of gem rubies were collected in situ from mine workings. The selected rubies were deep to fresh-blood-red...Meth. B, 150, 628-34 Game, P.M., 1954. Zoisite-amphibolite with corundum from Tanganyika. Mineralog. Magazine...techniques for gemstone exploration at the Rockland Ruby Mine, Mangare area, SE Kenya. J. Geochem. Exploration |  | | Journal (issue) | | the U.S.A. 05 0 74470 02033 2 UNM’s HARDING MINE Exploring Plentiful Pegmatite 2 ROCKNGEM.COM ...(motor separately) shipping weight 66 lbs, from Norway, MI. • 3/4" stainless steel shafts and ball bearings...Catalogs Kingsley North, Inc. P.O. Box 216: Dept 3, Norway, MI 49870-0216 Phone: 800-338-9280 www.kingsleynorth...With WorldWide Popularity 20 NEW MEXICO’S HARDING MINE The Must-See Pegmatite of the West Steve Voynick...are hopeful in a brighter tomorrow. Be well. Antoinette, Managing Editor arahn@beckett.com 715-721-0532 |  | | Book | | Poland Guyana Nephrite Peridot Thulite Quartz Norway Ruby Fluorite Sapphire Great Britain Sunstone...the Superpit is Australia’s largest open pit gold mine and is one of the largest open pit mines in the...greatest single producer; also Peru, US, Canada, Norway, Australia, Russia, Kazakhstan Rough Settings...Marie Antoinette’s diamond earrings △ Marie Antoinette pictured wearing the earrings R eigning as...alongside King Louis XVI from 1774 to 1792, Marie Antoinette was the most glamorous woman in Europe in the |  | | Journal (issue) | | Other types of corundum occurrences are found in amphibolite, pegmatite, gneiss and metasomatite. The gemmological...1990, there was a collapse in the Ho Ty mine (Billion hill mine, Figure 5a). Figure 4: (a) Tan Huong ruby...Vietnam), (b) Ruby boulder from Tan Huong placer mine. Photographed in 1998 by Gaston Giuliani. Nghiem...material has been very low. From 1992 to 1995, the mine was exploited by local peasants and hundreds of...company carried out a detailed investigation and the mine opened in 1997. Although thousands of kilograms |  | | Journal (issue) | | only one location in the world, the Benitoite Gem mine, in San Benito County, California. This historic...issue looks at the history of the Benitoite Gem mine, the geology of the New Idria district and current...date, a 15.42 carat stone from the Benitoite Gem mine. An artistic rendering, by GIA designer Lainie Mann...single location in the world, the Benitoite Gem mine in the New Idria district of San Benito County,...extension of the historic deposit at the Benitoite Gem mine was discovered in the spring of 1997, which should |  | | Journal (issue) | | Henning led a U.S. government delegation to tour its mine in southwest Greenland in May 2019. Left to right:...Ruby geologist Aaju Simonsen at Greenland Ruby’s mine in Aappaluttoq. Greenland Ruby is First Colored...way for Greenland Ruby to join. Greenland Ruby’s mine produces both ruby and pink sapphire. “We’re delighted...sapphire project in Australia is already a producing mine, we intend to more clearly delineate the deposit...spinels (Pardieu and Hughes, 2008). The historical mine of Kuh-i-Lal, exploited since the 7th century and |  | | Report (volume) | | locality: Exposure on south wall of Lynn Griffin no. 1 mine, west side of County Highway 29, 5.2 mi southwest...large hydraulic cut near the inactive Barlow gold mine near Dahlonega, Dawsonville and Campbell Mountain...horizon and is sharply bounded by undifferentiated amphibolite of the Pumpkinvine Creek. Age is Late Proterozoic...tan, calcareous, crossbedded, contorted medium sands containing coarse cobbles and boulders. As the glacier... ed., Geology and paleontology of the Lee Creek Mine, North Carolina, I: Smithsonian Contributions to |  | | Journal (issue) | | and chalcedonic concretions in anhydrite, Sandwith Mine, St. Bees, Cumbria. Bull. Geol. Surv. Gt Britain...visits to Johannesburg to visit a personal friend of mine, Michael Sutherland, F.G.A. (who is also a practising...the probable source. Three emeralds from the Maria Mine (approximately 17 miles north-west of MarvS—in the...been obtained to date in South Africa as virtually 'mine-run' material. It has apparently been from these...material from six mines, (1) the emerald-alexandrite mine near Lake Manyara in Tanzania, (2) the Merelani |  | | Report (issue) | | the San Juan Basin, New Mexico Carol L. Molnia, Antoinette L. Medlin, Kathleen K. Krohn, Joseph T. O'Connor...area, south-central Alaska: Site of a proposed coal mine Gary D. Stricker, Ronald H. Affolter, arul Michael...Group, such as the finegrained lenticular turbidite sands, may have some limited reservoir potential, but...Grenville-age metamorphic rocks, typical of the upper amphibolite-lower granulite facies of regional metamorphism...calcsilicate gneiss, consisting of a basal hornblende amphibolite and pyroxene gneiss with minor quartz-feldspar |  | | Journal (issue) | | diamonds traditionally associated with the Wesselton mine, “Cape” for pale yellow COLOR GRADING “D-TO-Z”...those typically recovered from the “Jagersfontein” mine in South Africa (Shipley, 1950b; Liddicoat, 1993)...With the influx of stones from Australia’s Argyle mine since the mid-1980s, there has been greater industry...learned about Winza rubies and came to the area to mine. Local reports aside, we do know that mining activities...one of the authors [VP] in Tanzania); it showed mine symbols near the location of the present corundum |  | | Report (issue) | | geochemistry of wall-rock alteration, ThompsonTemperly mine, southwest Wisconsin. . . .Joseph R. 33 Hatch, Allen...assessments by region and commodity .......... .Antoinette L. Medlin, David M Sutphin, and John H. De Young...Syndicate in Elko County, Nevada, is the northernmost mine in the Carlin gold belt. Soil samples were collected... North wall of the Old Main and East pit, Carlin gold mine, Nevada Phase equilibria in the H 20-NaCl system...folding and faulting. Metamorphism to lower amphibolite facies occurred before 1700 Ma The main ore bodies |  | | Report (issue) | | detailed information is generally available for a major mine than for a small prospect or mineral occurrence...the following regional MRDS representatives: Antoinette A. Medlin Eastern Region Representative U.S....conglomerates occur in the southeastern corner. Amphibolite-grade Precambrian schist and minor metaplutonic...Paleozoic age; and minor Proterozoic schist of amphibolite grade. Scattered minor pyrite, Fe-oxides, and...pelitic schist with interlayered amphibolite of epidoteamphibolite to amphibolite facies. A common mineralogy |  | | Journal (issue) | | found in the more famous emeralds from the Chivor mine. The next two papers reflect the growing importance...blue sapphire (filled square) in the Andranondambo mine. © Gemmological Association and Gem Testing Laboratory...1990). Vohibory group: 1-Vohibory formation (amphibolite gneisses, amphibolites, marbles); Graphite group:...Metamorphic grade increases from greenschist and amphibolite-facies in the Vohibory formation to intermediate...compositions of three sapphires from the Andranondambo mine Sapphire 1 Weight % Range (3 anals) Sapphire |  | | Journal (issue) | | In rock specimens of the rubybearing zoisite-amphibolite from Longido, Tanzania, pargasitic amphiboles...Republic of Laos, were purchased from, or donated by, mine operators at the localities shown in Figure 1. They...of hercynite and found in alluvium of a corundum mine in Bo Phloi is believed to be derived from the same...New Jersey, 325 pp Game, P.M., 1954. Zoisite-amphibolite with corundum from Tanganyika. Mineralogical...come from J. Gemm., 2003,28, 7,417-429 the Deva mine, Paroon Valley (Konar, Nuristan) in Afghanistan |  | | Journal (issue) | | Jersey on November 13, 1946, the son of Mary Antoinette Fiamingo and Andrew William Kosnar, a construction...1979 with an article on the Sweet Home mine. He mined the Dixie mine in Idaho Springs for leaf gold and crystallized...including Huanuni, Viloco, Llallagua, the San Jose mine in Oruro, Tasna, Morococala, Chicote Grande, and...reopened the now-famous Sweet Home mine in Alma, Colorado to mine specimen rhodochrosite, h bnerite,...Other localities mined include the Calumet Iron mine; Italian Mountain; and Mt. Antero. In July 1979 |  | | Report (issue) | | Van Gosen, B. S., and Modreski, P. J., The Apex Mine, Utah-A Colorado Plateau-type solution-collapse...mineral-deposit type. The criteria for each category are 1. A mine (with or without production); significant stream...(26,000 oz) of gold was produced at the Big Hurrah Mine, primarily between 1903 and and 1907. Fluid inclusions...low-pressure granulite facies; 2515 km, upper amphibolite facies migmatites and granitic rocks, many of...Interdisciplinary geophysical studies from regional to mine scale have been conducted along the Getchell trend |  | | Journal (issue) | | Cordillera in the Guavio-Macanal formation (Muzo mine and Cosquez mine). Banks et al. (2000) discovered that although...Sub-Saharan Africa, the emeralds of the Chantete mine have also been shown to have resulted from the magmatic...shifts due to secondary chromophores. The Chantete mine is located in the Ndola Rural Protected Area of...Britain Figure 1: Spinels from the new Lang Chap mine in Vietnam, varying in colour from orangey-red to...and represent typical colours of spinels from this mine. Some orangey-red to orangey-pink spinels (Figure |
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