Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-22T11:56:18.371Z Has data issue: false hasContentIssue false
  • English
  • Français

The adinoles of Dinas Head, Cornwall (With Plate XI.)

Published online by Cambridge University Press:  14 March 2018

S. O. Agrell
S. O. Agrell*
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
Get access Rights & Permissions [Opens in a new window]

Extract

Dinas Head is a small promontory adjoining Trevose Head, some five miles west of Padstow on the north coast of Cornwall. Petrographical attention was first drawn to it by Howard Fox, who in 1894, noted the development of albite-rich rocks between greenstone and slate, and he concluded that the rock was an adinole. He also noted the peculiar spherulitic development of albite giving some rocks an igneous appearance, but, on account of the fine banding preserved in these rocks, he concluded that they were metasomatized sediments. This conclusion was subsequently supported by McMahon and Hutchings. The Memoir of the Geological Survey of the Padstow and Camelford district agrees with Fox as to the origin of the adinole, and points out the exceptional thickness of its development when compared with other greenstone-slate contacts.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 25 , Issue 165 , June 1939 , pp. 305 - 337
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1939

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Publications to which Reference is Made

1. Blyth, (F. G. H.). The basic intrusive rocks associated with the Cambrian inlier near Malvern. Quart. Journ. Geol. Soc. London, 1935, vol. 91, pp. 463–478.Google Scholar
2. Clements, (J. M.). A contribution to the study of contact metamorphism. Amer. Journ. Sci., 1899, ser. 4, vol. 7, pp. 81–91.CrossRefGoogle Scholar
3. Daly, (R.A.). Igneous rocks and the depths of the earth. New York and London, 1933.Google Scholar
4. Dewey, (H.). On spilosites and adinoles from north Cornwall. Trans. Roy. Geol. Soc. Cornwall, 1915, vol. 15, pp. 71–84.Google Scholar
5. Fox, (H.). Notes on the cherts and associated rocks of Roundhole Point (Permizen Point), Cataclews Point, and Dinas Head, west of Padstow. Trans. Roy. Geol. Soc. Cornwall, 1895, vol. 11, pp. 687–724.Google Scholar
6. Fox, (H.). On a soda felspar rock at Dinas Head, north coast of Cornwall. Geol. Mag. London, 1895, dec. 4, vol. 2, pp. 13–20.Google Scholar
7. Harker, (A.). Metamorphism. London, 1932.Google Scholar
8. Hendriks, (E. M. L.). Rock succession and structure in south Cornwall, a revision. Quart. Journ. Geol. Soc. London, 1937, vol. 93, pp. 322–367.Google Scholar
9. Holmes, (A.). Petrographic methods and calculations. Second edition, London, 1930, pp. 464–67.Google Scholar
10. Kayser, (E.). Ueber die Contactmetamorphose der körnigen Diabase im Harz. Zeits. Deutsch. Geol. Gesell., 1870, vol. 22, pp. 103–172.Google Scholar
11. Kunitz, (W.). Die Mischungsreihen in der Turmalingruppe und die genetischen Beziehungen zwischen Turmalinen und Glimmern. Chemie der Erde, 1930, vol. 4, pp. 208–251.Google Scholar
12. Lossen, (K. A.). Ueber den Spilosit und Desmosit Zincken's. Zeits. Deutsch. Geol. Gesell., 1872, vol. 24, pp. 701–786.Google Scholar
13. McMahon, (C. A.) and Hutchinos, (W. M.). Note on pseudo-spherulites. Geol. Mag. London, 1895, dec. 4, vol. 2, pp. 257–259.Google Scholar
14. Milch, (L.). Über Adinolen und Adinolschiefer des Harzes. Zeits. Deutsch. Geol. Gesell., 1917, vol. 69, pp. 349–486.Google Scholar
15. Ransome, (F. L.). Geology and ore-deposits of the Breckenridge district, Colorado. Prof. Paper U.S. Geol. Surv., 1911, no. 75, pp. 96–99.Google Scholar
16. Winchell, (A. N.). Elements of optical mineralogy, Part II. Third edition, New York and London, 1933.Google Scholar
17. Mem. Geol. Surv. Great Britain, Explanation to Sheets 335 and 336, Padstow and Camelford. By Reid, C., Barrow, G., and Dewey, H., 1910.Google Scholar
18. Mem. Geol. Surv. Great Britain, Exp]anation to Sheet 339, Newton Abbot. By Ussher, W. A. E., 1913.Google Scholar