 | | Journal (article/letter/editorial) | | VARIATIONS IN COLUMBITE-GROUP MINERALS FROM GRANITIC PEGMATITES OF THE BRUNSWICK AND OXFORD FIELDS, MAINE: DIFFERENTIAL...FRANCIS Mineralogical Museum, Harvard University, 24 Oxford Street, Cambridge, Massachusetts 02138, U.S.A....field and the Central Maine Synclinorium of the Oxford pegmatite field, in Maine, are intruded by numerous...numerous rare-element granitic pegmatites that carry columbite-group minerals (CGM) as the principal (Nb,Ta)-bearing...Ta)-bearing phases. Generally, the CGM from Maine are hosted by pegmatites characterized by a LCT (Li–Cs–Ta) |  | Simmons, William, Falster, Alexander, Webber, Karen, Roda-Robles, Encarnación, Boudreaux, Andrew P., Grassi, Leah Rae, Freeman, Gary (2016) Bulk Composition of Mt. Mica Pegmatite, Maine, USA: Implications For the Origin of An Lct Type Pegmatite By Anatexis. The Canadian Mineralogist, 54 (4) 1053-1070 doi:10.3749/canmin.1600017 | Journal (article/letter/editorial) | | 1600017 BULK COMPOSITION OF MT. MICA PEGMATITE, MAINE, USA: IMPLICATIONS FOR THE ORIGIN OF AN LCT TYPE PEGMATITE...FALSTER, AND KAREN WEBBER Maine Mineral and Gem Museum, 99 Main St, Bethel, Maine 04217, U.S.A. ENCARNACIÓN...Coromoto Minerals, LLC, 48 Lovejoy Road, South Paris, Maine 04281, U.S.A. ABSTRACT The Mt. Mica pegmatite is...composition, anatexis, Sebago Migmatite Domain, Maine. § Corresponding author e-mail address: wsimmons@uno...Most of the exposed bedrock of Maine is Paleozoic in age. Western Maine has been affected by several orogenic |  | | Journal (article/letter/editorial) | | Ta-rich oxide minerals, such as those of the columbite–tantalite group, tapiolite-(Fe) and microlite...extremely Mn-rich columbite and tantalite, and microlite, the latter forming the host of columbite-(Mn) exsolution...assemblage consisting of tantalite-(Fe), tantalite-(Mn) and tapiolite-(Fe). Uranium-rich microlite (up to...Canalita pegmatite dikes. Keywords: microlite, columbite–tantalite group, tapiolite, cassiterite, granitic...riches en tantale, par exemple ceux de la série columbite–tantalite, la tapiolite-(Fe) et le microlite. |  | | Journal (article/letter/editorial) | | Article Two generations of zoned crystals of columbite-group minerals from granitic aplite–pegmatite...Mamede de Infesta, Portugal ct ed pr Abstract: Columbite-group minerals from dykes and sills composed of...area show different zonation patterns. The beryl–columbite-subtype and lepidolite-subtype pegmatites show...Ti content and Ta/ (Ta þ Nb) ratio and a lower Mn/(Mn þ Fe) ratio than the first generation. The second...Fe in the lepidolite subtype than in the beryl–columbite subtype. co 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |  | | Book (edition) | | AMSTERDAM • BOSTON • HEIDELBERG • LONDON NEW YORK • OXFORD • PARIS • SAN DIEGO SAN FRANCISCO • SINGAPORE •...Langford Lane, Kidlington, Oxford OX5 1 GB, UK 225 Wyman Street, Waltham, MA 02451, USA Copyright © 2015, 2008...space deposition. Right: Large open pore space of a black smoker wall with sphalerite (medium grey) and fine...mineral suites as seen, for instance, in hydrothermal black smokers from inside (hot) to outside (cold): • ...an extremely fine scale (2-3 cm, as observed in black smokers); telescoping is the key term for this behaviour |  | | Book | | Environmental Earth Science, Miami University, Oxford, OH, U.S.A. Franco Pirajno, Geological Survey of...account these mineralogical features, these dull black heavy mineral aggregates can successfully be used...Evolution of the Variscides Within the Alpine Mountain Range with Special Reference to Pegmatites .....The Variscan Massifs in the Alpine-Carpathian Mountain Range ..........................................Their Associated Pegmatites in the Swiss Alpine Mountain Range and the External Moldanubian Zone ..... |  | | Book | | vibrations (grey line) and its second derivative (black line). The positions of Gaussian components for...130–140 In (Hg2)3(AsO4)2 (Baran et al. 1999b) VI Mn –O *310 Octahedra with 8 edges shared per MnO6...the electric vector E ⊥ c (grey line) and E ∥ c (black line) (left) and schematic representation of the...water preferably occupies unit cells in which Fe or Mn are substituted with calcium that is present in these...(MgR2+R2+)– OH–□ and (MgMgR3+)–OH–□ where R = Fe or Mn (Ishida and Hawthorne 2001). Consequently, taking |
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Black Mountain Quarry, Rumford, Oxford County, Maine, USA