 | | Journal (article/letter/editorial) | | as an essential element are found in granitic pegmatites and alkalic rocks or in hydrothermal deposits...geologic record: the oldest known is beryl in pegmatites associated with the Sinceni pluton, Swaziland...with highly fractionated rare-element granitic pegmatites and with skarns at Långban and similar deposits...Ma, which is largely attributable to granitic pegmatites (Appalachian Mountains, U.S.A., and Urals, Russia)...Mineral age, beryllium, mineral evolution, granitic pegmatites, peralkaline complexes, supercontinent cycle |  | | Journal (article/letter/editorial) | | 165 THE LATE-STAGE MINIFLOOD OF Ca IN GRANITIC PEGMATITES: AN OPEN-SYSTEM ACID-REFLUX MODEL INVOLVING PLAGIOCLASE...Abstract As Richard H. Jahns used to say, granitic pegmatites are prone to stew in their own juice. The early...country rock, mostly from the apical parts of zoned pegmatites. There, it interacts with plagioclase in any...envision a convecting fluid phase cycling around the pegmatite body, and a reaction path that brings the acidified...acidified fluid back into the heart of the pegmatite. There, it is aggressive toward the microcline perthite |  | | Journal (article/letter/editorial) | | Sciences University of Wisconsin-River Falls 410 South Third Street River Falls, Wisconsin 54022 his is Wisconsin’s... breweries, bratwurst, and Packers football, Wisconsin also has a diverse geology and a history rich...forgotten, abandoned, and overgrown. In this respect, Wisconsin represents a frontier state for the mineral collector...quarry in Racine (Scovil 1994), the pegmatites of Florence County (Koehier 1989) and the Wausau area (Falster...summarizes and highlights what has been found in Wisconsin in the past 150 years and points the way to new |  | | Journal (article/letter/editorial) | | Norman, Oklahoma 73019 dlondon@ou.edu Reading P 2 Pegmatites: ART Downloaded by [University of California...principal environment will be that of granitic pegmatites, from which many of the finest mineral specimens...Ledge dike, Little Three mine, Ramona, San Diego County, California. Varieties of elbaite: (c) rubellite...Tourmaline Queen mine (1972), Pala district, San Diego County, California, Jesse Fisher and Joan Kureczka specimen...almost exclusively in association with granitic pegmatites (see London 2008, 2015a), tourmaline is a common |  | | Journal (article/letter/editorial) | | minerals and cassiterite from the Black Mountain pegmatite, Maine MICHAEL A. WISE* and CATHLEEN D. BROWN...Smithsonian Institution, Washington, DC, 20560, USA *Corresponding author, e-mail: wisem@si.edu Abstract:...Ta-,Sn-oxide minerals from the Black Mountain pegmatite has revealed the presence of discrete crystals...fractionation as commonly observed in F-enriched granitic pegmatites. Micrograins of CGM typically show higher Ta/(Ta...Key-words: cassiterite, columbite-group minerals, pegmatite, Black Mountain, Maine. 1. Introduction and |  | Novák, Milan, Cempírek, Jan, Gadas, Petr, Škoda, Radek, Vašinová Galiová, Michaela, Pezzotta, Federico, Groat, Lee A. (2015) Boralsilite and Li, Be-bearing "Boron Mullite" Al8B2Si2O19, Breakdown products of spodumene from the Manjaka pegmatite, Sahatany valley, Madagascar. The Canadian Mineralogist, 53 (2) 357-374 doi:10.3749/canmin.1400092 | Journal (article/letter/editorial) | | BREAKDOWN PRODUCTS OF SPODUMENE FROM THE MANJAKA PEGMATITE, SAHATANY VALLEY, MADAGASCAR MILAN NOVÁK§ Department...elbaite-subtype Manjaka granitic pegmatite, Sahatany Valley, Madagascar. The pegmatite mineral assemblage is relatively...> Ap + several accessory B-rich phases). This pegmatite forms an E–W-trending elongated body emplaced...emplaced in an Mg-rich calc-silicate rock; the pegmatite exocontact locally contains thin reaction zones (Tur+Phl±Brl)...minor extent of exocontact reactions along the pegmatite, and secondary rhodochrosite, are responsible |  | | Book | | ROCKHOUNDING Wisconsin A Guide to the State’s Best Sites ROBERT BEARD To the memory of my grandmother...rockhound that I ever knew, and she loved northern Wisconsin and geology. She would have been thrilled to...Beard, Robert D., author. Title: Rockhounding Wisconsin : a guide to the state’s best sites / Robert Beard...and preservation—Wisconsin—Guidebooks. | Minerals—Collection and preservation—Wisconsin—Guidebooks. Classification:...��������������������������������4 Geology of Wisconsin��������������������������������������������� |  | | Report (issue) | | International, LLC P.O. Box 263, East Hampton, CT 06424, USA Phone 1.860.267.1512; fax 1.860.267.7225 www.lapisint...CHRISTIAN WEISE VERLAG, GERMANY AND LAPIS INTERNATIONAL, USA Tourmaline ♦ History ♦ Mineralogy • Tourmaline...is adorned at its center with a large, polished, red tourmaline. The crown is housed at the Hradschin...Tourmaline . . ......... 68 Maximilian Glas • Pegmatites - An Overview .............70 William B. Simmons...pearls. The large (39.5 x 36.5 x 14 mm), bright red stone in the center of the front of the crown was |  | | Book | | the origin of secondary phosphates in granitic pegmatites during the oxidation of primary phosphates);...magmatic or hydrothermal origins of elbaite in the pegmatite cavities; the metamorphic or hydrothermal origins...secondary origins of some phosphates in granitic pegmatites etc. With the localities for individual minerals...light pink to copper-red, it darkens and covers green to black in air; S - red; L - metallic; D opaque;...copper are in the Keweenaw Peninsular, Lake Superior, USA, the largest being I 5 x 7 x 3m (approx. 50 x 23 |  | | Book | | the origin of secondary phosphates in granitic pegmatites during the oxidation of primary phosphates);...magmatic or hydrothermal origins of elbaite in the pegmatite cavities; the mctamorphic or hydrothermal origins...secondary origins of some phosphates in granitic pegmatites etc. The origin of individual minerals is described...rocks, including granitic and alkaline syenite pegmatites and With the localities for individual minerals...light pink to copper-red, it darkens and covers green to black in air; S - red; L - metallic; D opaque; |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Montrevel-en-Bresse, Ain, France. F. John Barlow: Appleton, Wisconsin. Peter Bayliss: Mineralogy, Australian Museum...accordance with whether the indices are greater for red or violet light, but the notation — may also refer...Granite pegmatites, including their oxidized and/or hydrothermally altered phases Syenitic pegmatites Massive...SC SD TN TX UT VT VA Washington West Virginia Wisconsin Wyoming WA WV WI WY Provinces, Canada AB Alberta...Mineralogist ISM V. C. Farmer, ed. The Intfra-red Specira of Minerals, Monograph 4, Mineralogical Society |
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