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V.—On the Origin of Certain Pegmatite Veins
Published online by Cambridge University Press: 01 May 2009
Extract
During a visit to the South of Sweden in the Summer of 1902 I noticed the frequent occurrence in granite of pegmatite veins showing a succession of small but very regular foldings, which, however, did not affect the parent rock. In sett quarries where these folded veins existed the rift of the rock was perfectly regular on each side of the pegmatite, proving conclusively to my mind that the contortion of the veins took place prior to the consolidation of the main mass. The granite of this district occupies a wide area, and possesses a very uniform mineralogical constitution, although it varies much in texture between a rather coarse-grained granitite and a fine-grained, compact, gneissose rock possessing well-marked foliation. The pegmatite veins are fairly numerous, but are generally rather insignificant in width, occasionally thinning out to mere streaks not more than a few inches in thickness.
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References
page 309 note 1 See Zirkel, “Lehrbuch der Petrographie,” vol. i, p. 787 et seq.
page 309 note 2 Mikroskopische Physiographie d. Mass. Gesteine, ii, p. 39.
page 309 note 3 “British Petrography,” p. 291.
page 309 note 4 “Die Mineralien der Syenit pegmatitgäuge,” etc., Leipzig, 1890.
page 309 note 5 Zeit., D. D. geol. Ges., vol. xxxiii (1881), p. 653.Google Scholar
page 309 note 6 See “Summary of Progress,” 1899, 1900, 1901, 1902.
page 313 note 1 See Frosterus, , “Über ein neues Vorkomniss von Kugelgranit,” etc.:Tschermak's Min. und Pet. Mittheilungen, xiii (1892), p. 177.Google Scholar
page 313 note 2 See Findlay, , “The Phase Rule,” chap, xiv (1904).Google Scholar
page 313 note 3 Cf. Morozewicz, “Experimentelle Untersuchungen Über die Bildung der Minerale im Magma”: Tschermak's Min. und Pet. Mittheilungen, xviii, pp. 232–3.
page 314 note 1 “Vergleichende Experimente über Verfestigung geschmolzener Gesteinsmassen unter Erhöhtem und normalem Druck”: Tschermak's Min. und Pet. Mittheilungen, xvii, p. 331.
page 314 note 2 Zeit, . fur physikalische Chemie, xxvi (1898), p. 307.Google Scholar