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Zonation in tourmaline from granitic pegmatites & the occurrence of tetrahedrally coordinated aluminum and boron in tourmaline

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dc.contributor.supervisor Hawthorne, Frank C. (Geological Sciences) en_US
dc.contributor.author Lussier, Aaron J.
dc.date.accessioned 2012-01-07T17:55:56Z
dc.date.available 2012-01-07T17:55:56Z
dc.date.issued 2008-06
dc.identifier.citation Lussier, A.J., Aguiar, P.M., Michaelis, V.K., Kroeker, S., Herwig, S., Abdu, Y. and Hawthorne, F.C. (2008) Mushroom elbaite from the Kat Chay mine, Momeik, near Mogok, Myanmar: I. Crystal chemistry by SREF, EMPA, MAS NMR and Mossbauer spectroscopy, Mineralogical Magazine, 72, 747-761. en_US
dc.identifier.citation Lussier, A.J., Hawthorne, F.C., Herwig, S., Abdu, Y., Aguiar, P.M., Michaelis, V.K. and Kroeker, S. (2008) Mushroom elbaite from the Kat Chay mine, Momeik, near Mogok, Myanmar: II. Zoning and crystal growth. Mineralogical Magazine, 72, 999-1010 en_US
dc.identifier.citation Lussier, A.J., Aguiar, P.M., Michaelis, V.K., Kroeker, S. and Hawthorne, F.C. (2009) The occurrence of tetrahedrally coordinated Al and B in tourmaline: an 11-B and 27-Al MAS NMR study. American Mineralogist, 94, 785-792. en_US
dc.identifier.citation Lussier, A.J., Abudu, Y., Hawthorne, F.C., Michaelis, V.K., Aguiar, P.M. and Kroeker, S. (2011) Oscillatory zoned liddicoatite from Anjanabonoina, Central Madagascar. I. Crystal chemistry and structure by SREF and 11-B and 27-Al MAS NMR spectroscopy. Canadian Mineralogist, 49, 63-88. en_US
dc.identifier.citation Lussier, A.J. and Hawthorne, F.C. (2011) Oscillatory zoned liddicoatite from Anjanabonoina, Central Madagascar. II. Compositional variation and mechanisms of substitution. Canadian Mineralogist, 49, 89-104. en_US
dc.identifier.citation Lussier, A.J., Hawthorne, F.C., Michaelis, V.K., Aguiar, P.M. and Kroeker, S. Elbaite-liddicoatite from Black Rapids glacier, Alaska. Periodico di Mineralogia, 80, 57-73 en_US
dc.identifier.citation Lussier, A.J., Hawthorne, F.C., Abdu, Y., Herwig, S., Michaelis, V.K., Aguiar, P.M. and Kroeker, S. The crystal chemistry of 'wheatsheaf' tourmaline from Magok, Myanmar. Mineralogical Magazine, 75, 65-86. en_US
dc.identifier.uri http://hdl.handle.net/1993/5043
dc.description.abstract [1] Four specimens of zoned tourmaline from granitic pegmatites are characterised in detail, each having unusual compositional and/or morphologic features: (1) a crystal from Black Rapids Glacier, Alaska, showing a central pink zone of elbaite mantled by a thin rim of green liddicoatite; (2) a large (~25 cm) slab of Madagascar liddicoatite cut along (001) showing complex patterns of oscillatory zoning; and (3) a wheatsheaf and (4) a mushroom elbaite from Mogok, Myanmar, both showing extensive bifurcation of fibrous crystals originating from a central core crystal, and showing pronounced discontinuous colour zoning. Crystal chemistry and crystal structure of these samples are characterised by SREF, EMPA, and 11B and 27Al MAS NMR and Mössbauer spectroscopies. For each sample, compositional change, as a function of crystal growth, is characterised by EMPA traverses, and the total chemical variation is reduced to a series of linear substitution mechanisms. Of particular interest are substitutions accommodating the variation in [4]B: (1) TB + YAl ↔ TSi + Y(Fe, Mn)2+, where transition metals are present, and (2) TB2 + YAl ↔ TSi2 + YLi, where transition metals are absent. Integration of all data sets delineates constraints on melt evolution and crystal growth mechanisms. [2] Uncertainty has surrounded the occurrence of [4]Al and [4]B at the T-site in tourmaline, because B is difficult to quantify by EMPA and Al is typically assigned to the octahedral Y- and Z-sites. Although both [4]Al and [4]B have been shown to occur in natural tourmalines, it is not currently known how common these substituents are. Using 11B and 27Al MAS NMR spectroscopy, the presence of [4]B and [4]Al is determined in fifty inclusion-free tourmalines of low transition-metal content with compositions corresponding to five different species. Chemical shifts of [4]B and [3]B in 11B spectra, and [4]Al and [6]Al in 27Al spectra, are well-resolved, allowing detection of very small (< ~0.1 apfu) amounts of T-site constituents. Results show that contents of 0.0 < [4]B, [4]Al < 0.5 apfu are common in tourmalines containing low amounts of paramagnetic species, and that all combinations of Si, Al and B occur in natural tourmalines. en_US
dc.publisher Mineralogical Society of Great Britan and Ireland en_US
dc.publisher Mineralogical Society of Great Britan and Ireland en_US
dc.publisher Mineraloigcal Society of America en_US
dc.publisher Mineralogical Association of Canada en_US
dc.publisher Mineralogical Association of Canada en_US
dc.publisher Edizioni Nuova Cultura en_US
dc.publisher Mineralogical Society of Great Britan and Ireland en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject tourmaline en_US
dc.subject liddicoatite en_US
dc.subject elbaite en_US
dc.subject oscillatory zoning en_US
dc.subject electron-microprobe analysis en_US
dc.subject liddicoatite-elbaite solid solution en_US
dc.subject crystal-structure en_US
dc.subject Mossbauer spectroscopy en_US
dc.subject Magic-Angle-Spinning Nuclear Magnetic Resonance spectroscopy en_US
dc.subject Anjanabonoina, Madagascar en_US
dc.subject Mogok, Myanmar en_US
dc.subject mushroom tourmaline en_US
dc.subject wheatsheaf tourmaline en_US
dc.subject tetrahedrally coordinated Al and B en_US
dc.title Zonation in tourmaline from granitic pegmatites & the occurrence of tetrahedrally coordinated aluminum and boron in tourmaline en_US
dc.type info:eu-repo/semantics/doctoralThesis
dc.degree.discipline Geological Sciences en_US
dc.contributor.examiningcommittee Halden, Norman M. (Geological Sciences) Kroeker, Scott (Chemistry) Groat, Lee (Earth and Ocean Sciences, UBC) en_US
dc.degree.level Doctor of Philosophy (Ph.D.) en_US
dc.description.note February 2012 en_US


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