 | | Report (issue) | | indistinguishable from associated rossovskyite, ilmenite, and rutile. Physical Properties: Cleavage: None. Tenacity:...X-ray Powder Pattern: Befanamo, along upper Betsiboka River, Analamanga, Madagascar. 2.961 (100), 2.938...65.84 . 100.00 (1) Befanamo, along upper Betsiboka River, Analamanga, Madagascar; average electron microprobe...Occurrence: In granitic pegmatite. Association: Rossovskyite, ilmenite, rutile, thortveitite, euxenite-(Y)...From Befanamo, 80 km north of Antananarivo, along upper Betsiboka River, Analamanga, Madagascar. Name: |  | | 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)...accepted by IMA, is an intergrowth of ilmenite and rutile rife with mineral inclusions indicative of a pegmatitic |  | | Journal (article/letter/editorial) | | Romeite Roquesite Roscoelite Roselite Rustenburgite Rutile Safflorite Samarskite Samsonite Ca3V10O28·17(H2O)...phosphates , K–Ba hollandite group minerals, Nb-bearing rutile and Mn-bearing ilmenite. Komatiites are composed...biotite, perovskite, apatite, calcite, and oxides. Pegmatite is a very coarse-grained igneous rock with a grain...syenite Nephelinite Norite Novaculite Okaite Pegmatite Pelite Peridotite Phonolite Phoscretes Phosphorite...sediments but rarely in volcanic rocks e.g., Cobalt district of Ontario, Canada, Wittichen, Richelsdorf, Bieber | | | Journal (article/letter/editorial) | | Romeite Roquesite Roscoelite Roselite Rustenburgite Rutile Safflorite Samarskite Samsonite Ca3V10O28·17(H2O)...phosphates , K–Ba hollandite group minerals, Nb-bearing rutile and Mn-bearing ilmenite. Komatiites are composed...biotite, perovskite, apatite, calcite, and oxides. Pegmatite is a very coarse-grained igneous rock with a grain...syenite Nephelinite Norite Novaculite Okaite Pegmatite Pelite Peridotite Phonolite Phoscretes Phosphorite...sediments but rarely in volcanic rocks e.g., Cobalt district of Ontario, Canada, Wittichen, Richelsdorf, Bieber |  | | Book | | and structure of the Moine Schists in the Morar district, western Inverness-shire. Abstract. Proc. geol...the sedimentary-volcanic sequences in the Kenema district of Sierra Leone reach the amphibolite and granulite...ages of 1850-2050 m.y. have been obtained for pegmatite minerals (Cahen, 1961, p. 546; Cahen and Snelling...Lukoshi Formation (Fig. 2); muscovite from a pegmatite cutting a manganese member of the Lukoshi sediments...world, is dealt with by Simpson (Chapter 5). Pegmatite from this complex has given an age of about 1200 |  | | 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)....thortveitite and thortveitite from the Tuftane pegmatite, Iveland, Norway, seem identical. The strongest...thortveitite differs principally from that of Norway and Madagascar (Levinson and Borup, 1960) in its lower zirconium...Norway and Madagascar. REFERENCES Behier, Jean, 1960, Contribution a la Mineralogie de Madagascar : Ann. |
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