 | Simmons, W. B., Pezzotta, F., Falster, A. U., Webber, K. L. (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. The Canadian Mineralogist, 39 (3) 747-755 doi:10.2113/gscanmin.39.3.747 | Journal (article/letter/editorial) | | ANALOGUE OF RHODIZITE FROM THE ANTANDROKOMBY GRANITIC PEGMATITE, MADAGASCAR WILLIAM B. SIMMONS§ Department...with rhodizite at Antandrokomby, a dike of granitic pegmatite in the Manandona valley, Antsirabe region...in the Betafo region south of Mahaiza, all in Madagascar. Londonite occurs in the inner zones and in miarolitic...quartz, albite, tourmaline (elbaite – liddicoatite – schorl series), Cs-rich beryl, spodumene, danburite, Mn-rich...calculated from an average of five analyses from Antandrokomby is: (Cs0.48K0.38Rb0.09Na0.03Ca0.02Mn0.01)⌺1 |  | | Journal (article/letter/editorial) | | bones. ..- RECENT MINING AT THE ANTANDROKOMBY PEGMATITE, MADAGASCAR J. W Nizamofl’ A. U.FalsteG’ F. Pezzotu...Earth Science Dept., Adrian, MI 49221. The Antandrokomby pegmatite is a steeply dipping dike located about...kilometers south of Antsirabe, in the Manandona Valley, Madagascar. The dike strikes approximately northeast...observed dimensions of the pegmatite are 350 x 1.2 meters. Geochemically, the pegmatite is classified within...pale green masses up to 10 cm across in massive pegmatite, but it was not found in the miarolitic cavities |  | Biagioni, Cristian, Meisser, Nicolas, Nestola, Fabrizio, Pasero, Marco, Robyr, Martin, Roth, Philippe, Schnyder, Cédric, Gieré, Reto (2018) Hydrokenopyrochlore, (□,#)2Nb2O6·H2O, a new species of the pyrochlore supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar. European Journal of Mineralogy, 30 (4) 869-876 doi:10.1127/ejm/2018/0030-2761 | Journal (article/letter/editorial) | | supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar Article in European Journal...supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar CRISTIAN BIAGIONI1,*, NICOLAS...discovered in the Antandrokomby pegmatite, Sahatany Pegmatite Field, Antananarivo Province, Madagascar. It occurs...portions of the pegmatitic dikes in the Sahatany Pegmatite Field. Key-words: hydrokenopyrochlore; new mineral...niobium; crystal structure; Sahatany Pegmatite Field; Madagascar. 1. Introduction The pyrochlore supergroup |  | | Report (issue) | | The Natural History Museum of Milan and its Madagascar Collection The Museo Civico di Storia Naturale... the museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous...fieldwork in Madagascar in 1996 in collaboration with other institu tions in Madagascar, Italy, and the...Pezzotta has spent a total of twenty nine months in Madagascar making geological-mineralogical surveys. In collaboration...both classic and new minerals and gemstones from Madagascar opened at the Natural History Museum in Milan |  | Pekov, I. V., Yakubovich, O. V., Massa, W., Chukanov, N. V., Kononkova, N. N., Agakhanov, A. A., Karpenko, V. Y. (2010) Londonite from the Urals, and new aspects of the crystal chemistry of the rhodozite-londonite series. The Canadian Mineralogist, 48 (2) 241-254 doi:10.3749/canmin.48.2.241 | Journal (article/letter/editorial) | | (both cotype localities) and Alabashka granitic pegmatite fields, Central Urals, Russia. All are Cs-dominant...structure-type, infrared spectrum, granitic pegmatite, Urals, Russia, Madagascar. Sommaire Ce travail porte sur...sodalite, spectre infrarouge, pegmatite granitique, Ourales, Russie, Madagascar. Introduction Rhodizite and...years of 20th century, rhodizite was found in Madagascar, where it is a relatively common mineral of many...localities in Madagascar. Both K- and Cs-dominant samples have been found in Madagascar pegmatites. Until |  | | Journal (article/letter/editorial) | | Antlerite, Utah, 244 Apatite, Bahia, Brazil, 38; Madagascar, 256; Michigan, 96; Ohio, 255 Aquamarine, Minas... Miguel Arrojado Ribeiro Listoa, 47 Arsenic, Madagascar, 256 Arsenopyrite, Colorado, 337; Maine, 412...Part 1,52-53 Dadsonite, Nevada, 128 Danburite, Madagascar, 256 Daniel Bonanza mine, Colorado, 3 11 Datolite...Estes Quarry, Cumberland County, Maine: A New Pegmatite Locality, W. B. Thompson, A. U. Falster, W. B...Estes Quarry, Cumberland County, Maine: A New Pegmatite Locality, 408-18; Minerals of the Brufnado Magnesite |  | | Journal (issue) | | west. Butte is situated in the Summit Valley, an intermontane valley at an elevation of 1,800 meters (5...Marcosson, 1957). By the winter of 1864 the Summit Valley district (Butte’s original name) had been organized...Co. Unita Unrepresented Valdemere Valley East Valley Queen Valley West Venus Vesuvius Virginius Volunteer...mentioning here. By the mid-1890’s, the Summit Valley had been more or less denuded of vegetation by...Bow Creek provided the sole drainage within the valley watershed, it became a de facto sewage system for |  | | Book | | northwest of the first, he collected good specimens of schorl and of ilmenite, the latter as unaltered and partially...rutile and iron oxides, and they are associated with schorl, quartz and cassiterite (Cairncross and Bahmann...acicular crystals of rutile (Weerth, 2004). Tonniq Valley, Skardu district, Gilgit-Baltistan [Northern Areas]...region of Alpine-type clefts along the Torrniq Valley produced small numbers of ilmenite specimens reminiscent...The thin-tabular ilmenite crystals of the Torrniq Valley also form spherical aggregates ("closed roses") |  | | Journal (issue) | | across, and more. Exploitation of this remarkable pegmatite continued intermittently until 1937, when the...bed. lt proved to be topaz from a Precambrian pegmatite cutting coarse-grained reddish granites of the...photo. Spodumene, 9.5 cm, from Resplendor, Doce Valley, Minas Gerais, Brazil. Don and Laura Aaron photo...this in mind, I prefer gern crystals, mostly pegmatite specimens in a few farnilies ... but not always...PAUL BORDOVSKY Schorl with aquamarine ("The Tuning Fork"), 5.2 cm, from the Shigar Valley, Gilgit-Baltistan |  | | Journal (issue) | | Museum Toronto, Ontario Steven R. Morehead Green Valley, AZ Donald R. Peacor University of Michigan Ann...Regularly! Alpine Mineral Company Fine Alpine and Gem Pegmatite Minerals www.alpineminerals.com e-mail: kevin@alpineminerals...colored by copper. Cuprian elbaite from the Batalha pegmatite veins, unrecognized until the 1980’s, has become...though not of such high quality; and the Khan pegmatite near Rössing, Namibia, is also high in copper...local mining industry has focused on industrial pegmatite minerals, especially tantalite. Access is via |  | | Journal (issue) | | Rhodizite-Londonite from the Antsongombato Pegmatite, Central Madagascar Brendan M. Laurs, Federico Pezzotta...Process ratified • Alexandrite from Mananjary, Madagascar • Colorchange apatite from Kazakhstan • New emerald...68); and Steve Ulatowski of New Era Gems, Grass Valley, California, for the before-and-after sample of... RHODIZITE-LONDONITE FROM THE ANTSONGOMBATO PEGMATITE, CENTRAL MADAGASCAR By Brendan M. Laurs, Federico Pezzotta...gem-quality londonite is the Antsongombato pegmatite in central Madagascar, from which at least 300 carats of |  | | Report (volume) | | Significance 317 Breccias and veins within granite or pegmatite 318 Occurrence and composition 318 Significance...assemblages 376 Tourmaline stability in magmas: Schorl-dravite 377 Acknowledgments 379 References 379...Spositio, George H. Swihart, John A. Tossell, John W. Valley, David J. Waters. Assistance from John Jambor,...Kramer H (1957) Ginorite and sassolite from Death Valley, California. Am Mineral 42:56-61 Anthony JW, Bideaux...Gowerite, a new hydrous calcium borate, from the Death Valley region, California. Am Mineral 44:911-919 Erd RC | | | Report (volume) | | MATHEMATICAL CRYSTALLOGRAPHY 16 1986 570 J.W. Valley H.P. Taylor, Jr. J.R. O'Neil STABLE ISOTOPES IN...ememeenae es 317 Breccias and veins within granite or pegmatite.................c.sceceeeeee eeeeee318 OCCUEPENCE...assemblages...... Tourmaline stability in magmas: Schorl-dravite ..................2..0008 Bare MOW COPIES...Spositio, George H. Swihart, John A. Tossell, John W. Valley, David J. Waters. Assistance from John Jambor,...Kramer H (1957) Ginorite and sassolite from Death Valley, California. Am Mineral 42:56-61 Anthony JW, Bideaux |  | | Book (volume) | | yegorovite Na4[Si2O4(OH)2]2·7H2O from the Palitra pegmatite, Lovozero massif, Kola peninsula hydrated proton)...MgB6O7(OH)6·2H2O Locality: Chelkar salt dome, Aksai Valley, Aktobe region, Kazakhstan (type locality). Description:...MgB6O7(OH)6·2H2O Locality: Chelkar salt dome, Aksai Valley, Aktobe region, Kazakhstan (type locality). Description:...Locality: Ampanodiana North pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa Commune...Vakinankaratra Region, Antananarivo Province, Madagascar. Description: Grey grains from the association |  | | Book | | SHAPE program available from Eric Dowty, 521 Hidden Valley Road, Kingsport, Tennessee, 37663, USA. The authors...Al)802o(OH)4*4H20, 0 Syst=? Monte Chiaro, Taro Valley, Italy. H=?, Dvv,=?, Dp=?, VHIE 08c. Veniale &...E Mon. Porcelanous white. Furnace Creek, Death Valley, Inyo Co., California, USA. H=4.5, Djj4= 2.88,...brown. Balangero serpentinite, Lanzo massif, Lanzo Valley, Piemonte, Italy. H=?, Djjj= 2.98, D(;= 3.098,...Translucent dark blue-green, green. Sapucaia Pegmatite, Galileia, Minas Gerais, Brazil. H=6, Djjj=3.60 |  | 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) | | Mineralogical Magazine A. LaCroix, Mineralogie de Madagascar, 1922 P. Embry and Fuller Manual of New Mineral...Mohave and Cochise Cos., AZ; Elmore, Idaho, and Valley Cos., ID; Goldfield, Esmer- 444.2 Silver 3...Wallaroo and Burra-Burra, SA, Australia; Aniseed Valley, near Nelson, New Zealand. Shaba, Zaire; Broken...Brazil, and Czech Republic; minor deposits in Madagascar, Turkey, Romania, Germany, Austria, and Sri Lanka...mines in Keweenaw Co., MI; Cashin mine, Paradox Valley, CO; Michipicoten Is., Lake Superior, ON, Canada; |
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