 | Grew, Edward S., McGee, James J., Yates, Martin G., Peacor, Donald R., Rouse, Roland C., Huijsmanns, Joep P. P., Shearer, Charles K., Wiedenbeck, Michael, Thost, Douglas E., Su, Shu-Chun (1998) Boralsilite (Al16B6Si2O37); a new mineral related to sillimanite from pegmatites in granulite-facies rocks. American Mineralogist, 83 (5) 638-651 doi:10.2138/am-1998-5-624 | Journal (article/letter/editorial) | | eastAntarctica (type locality) and Almgjotheii in the contact aureole of the Rogaland Intrusive Complex, southwesternNorway...potassiumfeldspar-plagioclase(An,,)boralsilite-werdingite-dumortierite-grandidierite(Almgjotheii); (3) quartz-potassiumfeld*...quartz-potassiumfeld* sillimanite (Almgjotheii). Boralsilite is estimated spar-boralsilite-dumortierite-andalusite...351wt%owhere the numbersin bracketswere determined from Almgjotheii material. Howeve! the SIMS BrO. values appearto...composition of MgoorFeo,*Al,ruuBeo*Br56ssiro.ro3, for Almgjotheii appearsto result from solid solutionof boralsilite |  | | Report (issue) | | 98B6.09Si1.91O37. (2) Almgjotheii, Rogaland Intrusive Complex, southwestern Norway; average electron microprobe...potassium feldspar, plagioclase(An22), werdingite, dumortierite, grandidierite (Almgjotheii); quartz, potassium...feldspar, dumortierite, andalusite, ± sillimanite (Almgjotheii). Distribution: At Larsemann Hills, Prydz Bay...Antarctica (TL) and at Almgjotheii, Rogaland Intrusive Complex, southwestern Norway. Name: From the composition |  | Grew, E. S., Graetsch, H. A., Poter, B., Yates, M. G., Buick, I., Bernhardt, H.-J., Schreyer, W., Werding, G., Carson, C. J., Clarke, G. L. (2008) Boralsilite, Al16B6Si2O37, and "boron-mullite:" Compositional variations and associated phases in experiment and nature. American Mineralogist, 93 (2) 283-299 doi:10.2138/am.2008.2571 | Journal (article/letter/editorial) | | Prydz Bay, East Antarctica, and at Almgotheii, Rogaland, Norway. Electron-microprobe analyses (including B)...microprobe, Larsemann Hills, Antarctica, Almgjotheii, Norway Introduction The first anhydrous ternary...from Mount Stafford and in the pegmatite from Almgjotheii. Analytical methods The synthetic and natural...microcline (Fig. 11a), but also occurring in plagioclase (Figs. 12a and 12b). Seven of the nine pegmatites...in the samples collected in 2003–2004 include plagioclase, from which it is 293 commonly separated by |  | 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) | | pegmatites (Larsemann Hills, Antarctica; Almgjotheii, Norway; and Horní Bory, Czech Republic). § Corresponding...composed of diopside (Di94–100Hd0–4Jhs0–4), plagioclase (An26–32), K-feldspar (Kfs73–96Ab1–10Cls0–26)...material from Larsemann Hills, Antarctica, and Almgjotheii, Norway (Grew et al. 1998a) with Al/Si ∼8.9–6.4,...Grew et al. (1998a) in boralsilite from the Almgjotheii pegmatite; the amounts found in the Manjaka pegmatite...olenite-foitite tourmaline on contacts with plagioclase during retrograde hydration. In the granitic |  | | Journal (article/letter/editorial) | | recognized: (i) Primary igneous assemblage: plagioclase I + quartz I + muscovite + garnet III + tourmaline...Prograde metamorphic assemblage: quartz II + plagioclase II + kyanite + K-feldspar + staurolite + tourmaline...metamorphic assemblage: pyrophyllite and kaolinite. Plagioclase, quartz and muscovite are major minerals in the...pegmatites in high-grade terrains in Antarctica, Norway and Madagascar. Key words: abyssal pegmatite; dumortierite;...modifications besides major minerals quartz, plagioclase and/or K-feldspar. Abyssal pegmatites form dikes |  | | Journal (volume) | | two tourmalines from Høydalen, Tørdal, Telemark, Norway 21 Alf Olav Larsen, Radek Škoda & Arne Åsheim... Telemark, Norway 33 Tomas Husdal & Uwe Kolitsch Behoite from Høgtuva, Nordland, Norway 39 Jörgen...minerals from the Kongsberg Silver Deposit, Buskerud, Norway 53 Lars Roger Størseth Kompleks sulfidmineralisering...Universitet i Oslo, Postboks 1172 Blindern, 0318 Oslo, Norway (a.b.mueller@nhm.uio.no) 2 Natural History Museum...Universitet i Oslo, Postboks 1172 Blindern, 0318 Oslo, Norway (a.b.mueller@nhm.uio.no) 2 Natural History Museum |  | | Journal (article/letter/editorial) | | The most abundant B-rich units are biotite–plagioclase gneisses, with local enrichments of prismatine...Cambrian magmatic activity. Quartz, K-feldspar, plagioclase, apatite, tourmaline and boralsilite are found...measurement). tourmaline are paler near altered plagioclase (Fig. 5A). These tourmaline grains are tan, blue...5B), notably where adjacent to K-feldspar or plagioclase (Fig. 5C). Other overgrowths are euhedral and...mantled by thin selvages of quartz penetrating plagioclase (Fig. 7A), similar to the quartz selvages around |  | Hiroi, Yoshikuni, Grew, Edward S., Motoyoshi, Yoichi, Peacor, Donald R., Rouse, Roland C., Matsubara, Satoshi, Yokoyama, Kazumi, Miyawaki, Ritsuro, Mcgee, James J., Su, Shu-Chun, Hokada, Tomokazu, Furukawa, Noboru, Shibasaki, Hiroshi (2002) Ominelite, (Fe,Mg)Al3BSiO9 (Fe2+analogue of grandidierite), a new mineral from porphyritic granite in Japan. American Mineralogist, 87 (1) 160-170 doi:10.2138/am-2002-0117 | Journal (article/letter/editorial) | | biotite, andalusite, topaz, alkali feldspar, plagioclase, muscovite, quartz, dumortierite, schorl, zircon...Compositions with Fe2+ > Mg have been reported from Almgjotheii, Norway (XFe = 0.50–0.81, Huijsmans et al. 1982;...granodiorite composed mainly of alkali-feldspar, plagioclase, and quartz with lesser amounts of sekaninaite...partially replaced by tourmaline. Alkali-feldspar, plagioclase, quartz, and sekaninaite occur both as phenocrysts...Carlsbad twin and encloses smaller grains of plagioclase and quartz. It is occasionally intergrown with |  | Cempirek, J., Novak, M., Dolnicek, Z., Kotkova, J., Skoda, R. (2010) Crystal chemistry and origin of grandidierite, ominelite, boralsilite, and werdingite from the Bory Granulite Massif, Czech Republic. American Mineralogist, 95 (10) 1533-1547 doi:10.2138/am.2010.3480 | Journal (article/letter/editorial) | | the matrix minerals K-feldspar, quartz, and plagioclase, was found in a veinlet cutting leucocratic granulite...Precambrian terrains [e.g., Madagascar, Antarctica, Norway, Canada; see review in Grew (1996)]. On the other...2008) and in abyssal pegmatites in Madagascar, Norway, and Antarctica (Grew et al. 1998b, 2008). Boralsilite...found in two localities so far, in Antarctica and Norway (Grew et al. 1998a, 2008), whereas boromullite...felsic granulites (quartz + alkali-feldspar + plagioclase + garnet + kyanite and/or sillimanite ± biotite) |  | | Report (volume) | | Navrotsky A, Zimmermann HD (1982) Thermodynamics of plagioclase-melt equilibria in the system albite-anorthite-diopside...Switzeretal. (1965) Little ThreeMine.CA Himalaya Mine, CA Norway synthetic volume from density refinement suggests...white and dark micas, in addition to quartz and plagioclase. The tectonic environment of peraluminous magmas...dominated by white and dark micas, quartz, and plagioclase could generate melts with perhaps as much as...conditions or in quartz-mica-rich compositions low in plagioclase: London, 1995) could generate greater boron contents | | | Report (volume) | | Navrotsky A, Zimmermann HD (1982) Thermodynamics of plagioclase-melt equilibria in the system albite-anorthite-diopside...white and dark micas, in addition to quartz and plagioclase. The tectonic environment of peraluminous magmas...dominated by white and dark micas, quartz, and plagioclase could generate melts with perhaps as much as...conditions or in quartz-mica-rich compositions low in plagioclase: London, 1995) could generate greater boron contents...fluid in equilibrium with tourmaline, calcic plagioclase, hornblende, and other minor reaction products |  | | Journal (issue) | | ophicalcites. Plagioclasites consist primarily of white plagioclase (anorthite) aggregates with minor 254 GEMS...marbles. Corundum plagioclasites consist of white plagioclase (anorthite), biotite, muscovite, and single sapphire...color up to 1.5 cm in size, associated with plagioclase. Bedrock exposures of corundum-bearing rocks...needles, plagioclase, margarite, ilmenite, spinel, and pyrrhotite • Rutile needles, plagioclase, apatite...needles, zircon, biotite, monazite, xenotime, plagioclase, ilmenite, pyrite, and spinel • Primary and |  | | Journal (volume) | | Fimmvörðuháls pass. Relatively primitive olivine and plagioclase bearing basalt was produced from ca. 500 m long...(with four crystals of Fo86), and a bytownite plagioclase (An81-76). Abundant vesicules and microlites...interstratified illite-smectite was detected. Plagioclase, Ca-dominant, was detected in the raw samples...assemblages of corundum + calcite + muscovite + plagioclase + K-feldspar ± diopside. The composition of fluid...of phlogopite and variable amounts of talc, plagioclase, tremoliteactinolite, and chlorite. Accessory |  | | Book (edition) | | wolframite (ferberitehiibnerite). The members of the plagioclase series are also separately listed: andesine,...752. 8.85.5.85.Z = 4. d: 4.1(7)- 3.16(10)- 259(7) Norway, abundant at Norra Karr, Jonkoping prov., - 233(7)...Stavem, and Tvedalen, all Langesundsfjord, Vestfold, Norway, and at Narssarssuk and at Naujakasik, Ilimaussaq... Ontario, at Urstacl, Hittero Is., Vest-Agder, Norway, and in some greisens and carbonatites. At the...U-Th-REE pegmatites on Hittero Is., Vest-Agder, Norway. In the Trout Creek Pass pegmatites, Chaffee co |
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