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| MINERALOGY OF AN EVOLVED DICKINSON COUNTY, MICHIGAN, PEGMATITE. T. W. Buchholz1, A. U. Falster 2, W. B. Simmons2...(1961) documented approximately ninety known pegmatite occurrences in central Dickinson County in the...Upper Peninsula of Michigan. A small beryl-rich pegmatite was investigated to describe its mineralogy and...determine its degree of geochemical evolution. The pegmatite is emplaced in Lower Proterozoic metamorphic rocks...probable that the pegmatite is late- to post-Penokean in age. Local control for pegmatite emplacement appears |
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| report of euhedral serendi bite crystals from this region. Most of the serendibite is massive, occurring...species at this locality is currently under way. ZIRCON F R O M T H E WAUSAU C O M P L E X , MARA THON...Rib Mountain pluton, and the Nine Mile pluton. Zircon is an accessory mineral throughout the complex...deep purple fluorite in lenses up to 20 cm across. Zircon also occurs in the massive zones of pegmatites...throughout the Wausau complex. I n the massive pegmatite, it commonly forms brown prismatic crystals surrounded |
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| William "Skip" Simmons and Alexander Falster, pegmatite specialists from the University of New Orleans...pegmatites. Most ore beryl occurs in massive pegmatite zones where crystals may reach considerable size...can be found adjacent to the core margin of the pegmatite and in Suggested Chromophores for Beryl Color-generating...the world's largest known beryl crystal is a pegmatite at Malakialina, Madagascar, which produced one...the giant-sized crystals found in the massive pegmatite portions. Morphology Beryl crystals are hexagonal |
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| Hampton submitted several samples from an unnamed pegmatite feldspar mine in Middleton. Two of the specimens...smokey quartz, lepi dolite, pink elbaite, altered zircon, uraninite, and what has proved to be fluorapatite...quarry at Glendale has produced a large variety of pegmatite phosphate minerals. Among these is the species |
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| CONTENTS Page Feature Articles: The Coolgardie pegmatite field, Western Australia Mark I. Jacobson ......minerals associated with ironstones in the Olary region, South Australia P.M. Ashley, B.G. Lottermoser...geological settings for diamonds, sapphires, rubies, zircon, topaz, tourmaline, garnets, quartz and many other...Mineralogy Vol 3, No 2, December 1997 %e Coo(gardie Pegmatite :fie[� 'Western .9Lustrafia Mark I. Jacobson Chevron...70593 California, USA This n otable Australian pegmatite locality has produced a range of lithium minerals |
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| Roland Bouhelier in 1973 from the "Bouhelier pegmatite", and shortly thereafter acquired by the Canadian...Organic compounds 491 Partially studied and unnamed MSH minerals 494 Gemstones 514 Pseudomorphs...an accumulated repository of partially studied (unnamed) minerals. This is likely to continue for many...and partially studied and unnamed (UK) minerals. For the unresolved unnamed minerals, all available technical...named Monteregie is now the current name of the region. he name Mont Saint-Hilaire is used interchangeably |
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| .. 42 ?. Muscovite in the vail zone of the pegmatite in tha Meadow mine, Avery Co. ..................area in the northeastern part of the Spruce Pine pegmatite district* on the Blue Ridge upland in western...which make the mining district accessible* The region is drained by the Toe River and its numerous tributaries...Geological Sorvey Professional Paper describing pegmatite* in the Blue Iddge Province* In 1948, the general...eastern and southeastern border of the Spruce Pine pegmatite district. A detailed discussion of the scarp |
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| California, is arguably the most important gem-pegmatite district in North America. Its wealth of tourmalines...rule is usually true only for special items from a region. The common minerals are not usually thus affected...specimens sell for a premium is that visitors to a region seldom arrive when the supply of minerals is being...Mine in Topsham: both are small open pits in pegmatite. Morrill et al. (l 958) relieves the problem by...standard labeling procedures when they collect at unnamed sites. Locality data should be referred to nearby |
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| danburite, forsterite, fluorapatite, topaz, quartz and zircon, plus rare species like hibonite, johachidolite...crystals of red spinel, topaz, aquamarine, peridot, zircon, fluorapatite and enstatite, and among its other...or even a group of discrete mines but rather a region where, most commonly, crystals are taken from thousands... of the British conquest in the 1880s, the Mogok region, controlled in turns by Shan and Burmese, traded...Kathé, and King Nandabayin sought to reclaim the region, preferably without further warfare. Somehow it |
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| e r a lo j g ic a l Volume Eight/Number Two PEGMATITE ISSUE #1 p u b lis h e r ls * h n Q n i. • ;...83 by R. Lasmanis The Clear Creek Pegmatite: A Rare Earth Pegmatite in Burnet County, Texas............. Iores K IO i DITOR Here it is: our first Pegmatite Issue! Actually this accumulation is a happy accident;...our file of articles I realized we had enough pegmatite-related papers to fill an issue. One advantage...a certain article. The article on the Harding pegmatite, for instance, may not cause “Vol. 8, no. 2!” |
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| but Espenshade (1954) identifies it as a short unnamed inclined adit accompanied by a small dump about...Argentina. Ahlfeld surveyed the mineral deposits of the region and published a book on the mineralogy of Argentina...man in this very steep and remote sub-tropical region. Figure 1. Friedrich Ahlfeld as a young man. Photo...Kempff National Park in eastern Bolivia. This remote region was discovered by the legendary British explorer...new sulphostannate]. (1926) Los minerales de la region metalifera de la cordillera del norte, Bolivia |
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| localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during...crystals from 2 to 5 cm across occur with good brown zircon crystals (Britvin, Ivanyuk andYakovenchuk, 1995;...is the source of the large, lustrous, rich brown zircon crystals which arguably are world's best for the |
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| INSIDE THIS ISSUE: • The geology of Double Rock pegmatite • The Kemble family, long-term Franklin mineral...Photos From the Field 11 Geology of Double Rock Pegmatite From the Buckwheat Open Cut, Richard A.Volkert...crystals, epidote crystal druses, stromatolites, pegmatite with a pink scapolite/ diopside mix, and sparkly...International License. Geology of Double Rock Pegmatite From the Buckwheat Open Cut Richard A. Volkert...preserved in the geologic literature. This notable pegmatite is, of course, Double Rock. Pegmatites are an |
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| perovskite, pyrite, pyrochlore, quartz, weloganite and zircon (Jambor et al., 1976; Simpson, 1980). The phenocrysts...Thorbastnäsite Viitaniemiite Voggite Weloganite Wurtzite Zircon “Bitumen” Dikes* Sill Lime Quarry Upper Lower...Phlogopite Saponite Serpentine series Talc Thaumasite Zircon Organic minerals “Bitumen” Humboldtine CAPITALIZED...baddeleyite is intimately intergrown with grains of zircon (Sabina, 1979). Baddeleyite is an intermediate...potential presence of baddeleyite, thorbastnäsite and zircon (Sabina, 1979). Other associated minerals include |
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| Helpful suggestions on field occurrences and pegmatite mineralogy were received horn Dr. James J. Norton...Topographic maps are available for all of the Black Hills region and may be purchased from the United States Geological...(Andradite) (Grossu.larite) (Pyrope) (Spessartite) Zircon (Cyrtolite) Olivine (Forsterite) Topaz Nesosilicates...north side of the tunnel entrance to the Greene pegmatite three miles east-northeast of Pringle has been...southeast part of the Gayle (Dubuque)-Royal Flush pegmatite 5.9 miles southwest of Custer by Redden (5) p |
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| Rare-earth minerals in the Alpine ar,d Subalpine region [Switzerland,Austria and Iti:Jy](by C. M. Gramaccioli)...Strontian crandallite from the Alto Benedeto pegmatite, Parai'ba, Brazil (by J.P. Cassedanne & L. Barreto)...21:409-412 --with J. P. Cassedanne: The Jaguara~u pegmatite, Minas Gerais, Brazil 25:165-170 9 AUTHOR/TITLE...Cassedanne) 8:382-387 Amethyst from the Thunder Bay region, Ontario (by D. G. Ellion) 13:67-70 New data on...23:209-225. 23:228 Al 'JAJ\ABO~OINA The Anjanabonoina pegmatite. Madagascar (by W. E. Wilson) 20:191-200 A.'\ |
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| with tourmaline, have sustained the Golconda pegmatite field’s reputation as among the most important...districts in all of Brazil. INTRODUCTION The Golconda Pegmatite Field is a familiar name to mineral collectors...Consequently the authors (CC and AB) traveled to the region in June 2017 and March 2018 to tour the various...for mica produced in Minas Gerais. A rich, new pegmatite deposit in the Brazilian Golconda area, best known...Bellin (1755), including the region now known as the Eastern Pegmatite Province. Just below the center |
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| - Photograph of monazite pocket in the Nambe pegmatite, Rio Arriba County . . . . . . 1 6 0 Figure 40...sandstone, vein-type, hydrothermal-vein, and pegmatite deposits scattered throughout the state (Fig....Triassic rocks of New Mexico.In the Great Plains region tke Chinle consists of three informal members;...Poleo Sandstone Lentil, Petrified Forest, and an unnamed siltstone member (O'Sullivan, 1974, 1977). These...RioGrandevalleyandinthe Mogollon unknown Plateau for region; most of the uranium content or radioactivity |
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| been invented only 17 years earlier by Bartolome Medina at Pachuca, Mexico. The process involves the cold... (1968) Geologia y yacimientos minerales de la region de Potosf. Tomo II, Parte Minera. Geoboletin (Bolivia... (1968) Geologia y yacimientos minerales de la region de Potosf. Tomo I, Parte geologica, Geoboletin...brochantite inclusions recently mined in the Huancavelica region, Peru. The specimens consist of large gypsum crystals...Argentina has come up with a surprise: a granite pegmatite locality. Xavier du Gromont is the geologist working |
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| Pegmatite Investigations 1942-1945 Black Hills, South Dakota By LINCOLN R. PAGE and OTHERS GEOLOGICAL...pocket] PLATE 1. Index map showing locations of pegmatite mines and prospects. 2. 3. 4. 5. 6. 7. 8. 9....Dakota. Geologic map and sections Beecher Lode pegmatite, Ouster County, South Dakota. Geologic map and...Geologic map and sections,' Elkhorn and Hot Shot pegmatite mines, Custer County, South Dakota. Geology of...of U. S. Bureau of Mines sample cuts, Elkhorn pegmatite, Custer County, South Dakota. Geologic map and |
