 | | Journal (article/letter/editorial) | | post-kinematic Palaeoproterozoic pegmatites in Sweden R o l f L. Romer a,,, Sten-Anders Smeds b a Department...Applied Geology, Luled University, S-971 87 Luled, Sweden b Institue of Earth Sciences, Mineralogy-Petrolrology...Uppsala University, Norbyv. 18B, S-752 36 Uppsala, Sweden Received 6 June 1996; accepted 13 September 1996...the Palaeoproterozoic Bothnian Basin of central Sweden formed during the short age interval between 1803...pegmatites from a much smaller area in south-central Sweden seem to encompass a much larger age range between |  | | Journal (article/letter/editorial) | | Italy. A deep azure-blue beryl was reported from quartz veins in conglomerate from southeast Ireland (Sanders...Alpine veins in Tessin, Switzerland (Weiß, 1994). In quartz veins in syenite from the southern Yukon Territory...Other minerals in the paragenesis are biotite, quartz, plagioclase and muscovite. 28 Five samples...beryl obtained in the separation process. Finally, quartz and then plagioclase followed in the last fractions...focussing camera with 22.9 cm effective diameter, quartz monochromator and FeKα1 radiation (λ = 1.93728 |  | | Journal (article/letter/editorial) | | 1b). Zone I is mainly composed of medium-grained quartz, muscovite and fine albite. In this zone, beryl...beryl is abundant and occurs in muscovite and quartz. The beryl forms euhedral to subhedral crystals varying...and facies IIb (greenish muscovite with 10 vol.% quartz and 30 vol.% albite). Euhedral white beryl crystals...mainly contains platy crystals of albite, coarse quartz, and spodumene. Beryl forms subhedral crystals...cassiterite. Zone IV is mainly composed of coarsegrained quartz, massive spodumene and amblygonite crystals. Beryl |  | | Journal (volume) | | the industrial minerals K-feldspar, Nafeldspar, quartz and mica (e.g. Glover et al. 2012). For these reasons...pegmatite bodies, the occurrence of massive, monophase quartz cores in the centre of pegmatites and the extreme...Madagascar (Schaller 1916, Rickwood 1981). Massive quartz cores in pegmatites can reach dimensions of more...pegmatite-forming minerals, including feldspar, mica, and quartz, has potential for a chemical classification, even...(3) the common occurrence of massive, monophase quartz cores in the centre of pegmatites, and (4) the |  | | Journal (volume) | | Dan Topa Eclarite from Bleka, Svartdal, Telemark county, Norway 65 Alf Olav Larsen (red.) Bleka grube...Italy. A deep azure-blue beryl was reported from quartz veins in conglomerate from southeast Ireland (Sanders...Alpine veins in Tessin, Switzerland (Weiß, 1994). In quartz veins in syenite from the southern Yukon Territory...Other minerals in the paragenesis are biotite, quartz, plagioclase and muscovite. 28 Five samples...beryl obtained in the separation process. Finally, quartz and then plagioclase followed in the last fractions |  | | Book | | . . . . . . . . . . . . . . . . . . . . . . . Kramfors . . . . . . . . . . . 18 I NV . . . . . . . ..... . . . . . . . Kramfors . . . . . . . . . . . 18 I NV . . . . . . . . 1 06 Der Sels-Vilberget·Pegmatit.... . . . . . . . . . . . . . . . . . . . . . . Kramfors . . . . . . . . . . . 1 8H NO. . . . . . . . 1...der R 334 ca. 2 km in Richtung LAGE UND ZUGANG Kramfors/Bollstabruk, biegt bei Edsbacken nach rechts (=...man den Wagen abstellen. Alie AufschlOsse von Kramfors. Im NO des Ortes erhebt sich der Snodasberget |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Steven R. Morehead... 191 by W. E. Wilson U n u su a lly sh a p e d quartz aggregates from T irniauz, R u ssia ........................ 233 COVER: BOURNON1TE crystals on quartz, 8 cm, from the Herodsfoot mine, Liskeard, Cornwall...future. INTRODUCTION Boulby mine is situated in the county o f Cleveland on the northeast coast of England...Stewart (1965) and by Woods and Powell (1979), quartz is a widespread but minor constituent o f the Boulby |
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