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The composition and paragenesis of the biotites of the Carsphairn igneous complex

Published online by Cambridge University Press:  14 March 2018

W. A. Deer
W. A. Deer*
Affiliation:
Department of Mineralogy and Petrology, Cambridge
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Extract

The Cairnsmore of Carsphalrn igneous complex (1) is the smallest of the larger Caledonian intrusions of the Southern Uplands of Scotland. The intrusion is composite, consisting of a central granite, followed by successive zones of granite-tonalite hybrid, tonalite, and basic hybrids. The complex began with the intrusion of a gabbro. When this was crystallized, but still at a high temperature, the tonalite was emplaced. This intrusion of tonalite produced a series of hornblende-hybrids. The hybridization of the original gabbro attendant on the injection of the tonalite is the result of a 'partial magma' of potash-felspar, quartz, and volatiles. The final intrusion of granite took place while the tonalite was still incompletely crystallized, and resulted in the formation of a zone of acid hybrid rocks. The three biotites that have been analysed occur in the granite, tonalite, and hornblende-hybrid respectively.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 24 , Issue 156 , March 1937 , pp. 495 - 502
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1937

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References

1. Deer, W. A., The Cairnsmore of Carsphairn igneous complex. Quart. Journ. Geol. Soc. London, 1935, vol. 91, pp. 47-76.Google Scholar
2. Chapman, R. W. and Williams, C. R., Evolution of the White Mountain magma series. Amer. Min., 1935, vol. 20, pp. 502-530: [Min. Abstr., 6-215.]Google Scholar
3. Hurlbut, C. S., Dark inclusions in a tonalite of southern California. Amer. Min., 1935, vol. 20, pp. 609-630. [M.A. 6-223.]Google Scholar
4. Hallimond, A. F., On the chemical classification of the mica group. II. The basic micas. Min. Mag., 1926, vol. 21, pp. 25-33.Google Scholar
5. Brammall, A. and Harwood, H. F., The Dartmoor granites : their genetic relationships. Quart. Journ. Geol. Soc. London, 1932, vol. 88, pp. 171-237.CrossRefGoogle Scholar
6. Pauling, L. The structure of the micas and related minerals. Proc. Nat. Acad. Sci. U.S.A., 1930, vol. 16, pp. 123-129. [M.A. 4-368.]Google Scholar
7. Mauguin, C., Étude des micas (non-fluorés) au moyen des rayons X. Compt. Rend. Acad. Sci. Paris, 1928, vol. 186, pp. 879-881. [M.A. 4-32.] Étude des micas fluorés au moyen des rayons X. Ibid., 1928, vol. 186, pp. 1131-1133. [M.A. 4-33.]Google Scholar
8. Jackon, W. W. and West, J., The structure of muscovite... Zeits. Krist., 1930, vol. 76, pp. 211-227 ; 1933, vol. 85, pp. 160-164. [M.A. 4-467, 5-325.]Google Scholar
9. Gruner, J. W., The crystal structures of talc and pyrophyllite. Zeits. Krist., 1934, vol. 88, pp. 412-419. [M.A. 6-45.]Google Scholar
10. McMurchy, R.C., The crystal structure of the chlorite minerals. Zeits. Krist., 1934, vol. 88, pp. 420-432. [M.A. 6-45.]Google Scholar
11. Koch, G., Chemische und physikalisch-optische Zusammenhänge innerhalb der Sprödglimmergruppe. Chem. der Erde, 1935, vol. 9, pp. 453-463. [M.A. 6-238.]Google Scholar
12. Machatschki, F., Die Formel des Astrophyllites und seine Beziehungen zu den Glimmern. Centr. Min., Abt. A. 1930, pp. 255-267. Die Calcium-Sprödglimmer. Ibid., 1932, pp. 65-68. [M.A. 5-215.]Google Scholar
13. Winchell, A. N., Further studies in the mica group. Amer. Min., 1927, vol. 12, pp. 267-279. [M.A. 3-374.]Google Scholar
14. Warren, B. E., The crystal structure and chemical composition of the monoclinic amphiboles. Zeits. Krist., 1930, vol. 72, pp. 493-517. [M.A. 4-278.]Google Scholar
15. Vernadsky, W., Quelques considérations sur l'étude chimique des alumosilicates. Zeits. Krist., 1933, vol. 84, pp. 337-373. [M.A. 6-61.]Google Scholar
16. Kunitz, W., Die Beziehungen zwischen der chemischen Zusammensetzung und den physikalisch-optischen Eigenschaften innerhalb der Glimmergruppe. Neues Jahrb. Min., Abt. A, 1934, Beil.-Bd. 50, pp. 365-413.Google Scholar
17. Winchell, A. N., The biotite system. Amer. Min., 1935, vol. 20, p. 778. [M.A. 6-294.]Google Scholar