 | 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...the Antandrokomby pegmatite, Sahatany Pegmatite Field, Antananarivo Province, Madagascar. It occurs as tan...with a resinous luster, associated with quartz, tourmaline, orthoclase, Li-bearing mica, hübnerite, stibiotantalite...portions of the pegmatitic dikes in the Sahatany Pegmatite Field. Key-words: hydrokenopyrochlore; new mineral |  | | Journal (article/letter/editorial) | | AND “HYBRID” ANJANABONOINA GRANITIC PEGMATITE, CENTRAL MADAGASCAR: A RECORD OF MAGMATIC AND POSTMAGMATIC... granitic pegmatite dikes, located about 40 km southwest of Betafo, in central Madagascar, are emplaced...metamorphic grade. The subhorizontal bodies of pegmatite are strongly zoned and, in the mineralized area...The primary minerals are typical of an NYF-type pegmatite, and contrast with the LCT-type mineralogy (which... granitic pegmatite, Anjanabonoina, central Madagascar. Sommaire Les filons de pegmatite granitique |  | | Journal (article/letter/editorial) | | boron isotopic evolution of the Little Three pegmatites, Ramona, CA James L. Maner, David London PII:...boron isotopic evolution of the Little Three pegmatites, Ramona, CA. The address for the corresponding...boron isotopic evolution of the Little Three pegmatites, Ramona, CA James L. Maner IV* and David London...CR ABSTRACT Tourmaline, mica, hambergite, danburite, and axinite from three pegmatite dikes (named Main...their boron isotopic compositions (δ11B). AN Tourmaline is the sole host of B in the massive footwall |  | | Journal (article/letter/editorial) | | boron isotopes, isotope fractionation, tourmaline, pegmatites 2 ACCEPTED MANUSCRIPT 1. Introduction...abundant B-rich mineral in the continental crust is tourmaline (tur) (Grew, 1996; London et al., 1996); however...(ms), which is volumetrically more abundant than tourmaline, constitutes a large reservoir of B as well (London...materials have focused on the compositions of tourmaline and micas (Maner and London, 2017; Marschall...Marschall, 2007). The δ11B values of tourmaline from granites and pegmatites have been used to assess (1) the |  | | Journal (article/letter/editorial) | | (2005) THE PATTERNS OF ENRICHMENT IN FELSIC PEGMATITES ULTIMATELY DEPEND ON TECTONIC SETTING Robert...Abstract The classification scheme of granitic pegmatites currently in vogue is largely an offshoot of...it to pegmatites in silica-saturated and -undersaturated systems. Small-scale bodies of pegmatites are...category of corundum-bearing anatectic felsic pegmatite formed in mantle peridotite earlier subjected...overprint by a mixed H2O + CO2 fluid. The bulk of the pegmatite bodies encountered are not obviously of anatectic |  | | Journal (issue) | | Instruments and Tips on Practical Gemology in the Field Edward W. Boehm An essential guide to the use of...purchasing gems. 28 Liddicoatite Tourmaline from Anjanabonoina, Madagascar Dona M. Dirlam, Brendan M. Laurs...source of this remarkable calcium-rich lithium tourmaline, named in honor of Richard T. Liddicoat. 54...elbaite with Cu • Vesuvianite from Kenya and Madagascar • Star opal triplets • Plus: Emeralds from Hiddenite...Hiddenite, North Carolina • Star emerald from Madagascar • Tourmaline “slider” in quartz 107 109 111 114 The |
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Tetezantsio pegmatites, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar