 | | Journal (article/letter/editorial) | | from a granitic pegmatite, later referred to as Landsverk 3, in the Iveland-Evje district north of Kristiansand...kilograms of thortveitite from the Iveland-Evje pegmatite field were sold to the Dupont Corporation for...to as scandium ixiolite, which, in the Tørdal pegmatite in Norway, contains up to 12 wt % Sc (Bergstøl...and pyrochlore [(Na,Ca)2Nb2O6(O,OH,F)] in this pegmatite contain up to 4 wt % Sc. Titanium minerals known...ilmenorutile. For example, in the Iveland-Evje district (Norway), the scandium content of ilmenite in |  | | Book | | and structure of the Moine Schists in the Morar district, western Inverness-shire. Abstract. Proc. geol...regions; the Ebolowa-type granites have yielded biotite and zircon Pb/« ages of 2200-2500 m.y. (Lasserre...the sedimentary-volcanic sequences in the Kenema district of Sierra Leone reach the amphibolite and granulite...given a similar zircon Pb/a age of 2680 m.y. and a biotite age of c. 2000 m.y. (Bonhomme, 1962). Comparable...and discordant granites that have yielded Rb-Sr biotite ages in the 1950-2000 m.y. range suggesting that |  | | Book | | quartz at the core of the pegmatite is concerned. In comparison with other pegmatite deposits in the area...area, however, the Hagendorf-Pleystein Pegmatite Province (HPPP) is not only the largest concentration of...everything has been told about this prominent pegmatite. Professor Strunz was a generous and open-minded...(Trutzhofmühle Aploid, Pleystein New Aplite, Miesbrunn Pegmatite Aplites Swarm West and East, Reinhardsrieth Aplite)...to shed some light on the economic geology of pegmatite deposits. The current book project has been written |  | | Journal (article/letter/editorial) | | (continued) Mineral Chemical composition Line Biotite Birnessite Bischofite Bismite Bismuth native Bismuthinite...no hypersthene. Lamprophyre mainly composed of biotite or phlogopite and melilite. May also contain olivine...mafic minerals such as pyroxene, hornblende or biotite. Matrix consists of the same minerals as the phenocrysts...typical rock-forming mineral besides microcline, biotite, calcite, zircon, aegirite, pyrochlore and apatite...Accessory and alteration minerals include hornblende, biotite, chlorite, and calcite. This diabasic texture is | | | Journal (article/letter/editorial) | | (continued) Mineral Chemical composition Line Biotite Birnessite Bischofite Bismite Bismuth native Bismuthinite...no hypersthene. Lamprophyre mainly composed of biotite or phlogopite and melilite. May also contain olivine...mafic minerals such as pyroxene, hornblende or biotite. Matrix consists of the same minerals as the phenocrysts...typical rock-forming mineral besides microcline, biotite, calcite, zircon, aegirite, pyrochlore and apatite...Accessory and alteration minerals include hornblende, biotite, chlorite, and calcite. This diabasic texture is |  | | Report (issue) | | pegmatites in the Iveland-Evje district (Schetelig, 1922; Neumann, 1961); and Madagascar, where it occurs in the...the Befanamo pegmatite (Lacroix, 1920) and in the pegmatite district of Berere (Behier, 1960, p. 20)....fluorite in coarse-grained biotite granite containing xenoliths of biotite-quartz-plagioclase gneiss,...dark-purple fluorite that contains considerable biotite and subordinate sphene, quartz, oligoclase, rare-earth-bearing...thortveitite and thortveitite from the Tuftane pegmatite, Iveland, Norway, seem identical. The strongest |
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