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The tholeiite dikes of the north of England1

Published online by Cambridge University Press:  14 March 2018

Arthur Holmes  and
H. F. Harwood
Arthur Holmes
Affiliation:
The University, Durham
H. F. Harwood
Affiliation:
The University, Durham
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Extract

The suite of dikes that forms the subject of this paper is bounded on the south from Sleights Moor (south of Whitby) to Dalston (south of Carlisle) by the well-known series of dikes known collectively as the Cleveland-Cockfield-Armathwaite dike, and on the north by the nearly parallel and more continuous Acklington dike which stretchesfrom Bondicarr near Coquet Island across the southern margin of the Cheviots into Scotland.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 22 , Issue 124 , March 1929 , pp. 1 - 52
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1929

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Footnotes

1

The eight new chemical analyses (and calculations of norms) presented in this paper have been made by Dr. Harwood. The field work and petrological investigations have been carried out by Professor Holmes, who is also responsible for the writing of the paper.

References

page 8 note 1 J. Steininger, Geognostische Beschreibung des Landes zwischen der untern Saar und dem Rheine (Trier, 1840). Naehträge (Trier, 1841), p. 26. The rock to which the name was given occurs on the Schaumberg at Tholey in the Saar district. A chemical analysis of this rock was given by C. Bergemann in Karsten's Arkiv Min., 1847, vol. 21, p. 12.

page 8 note 2 H. Rosenbusch, 2nd edition, 1887, vol. 2, p. 504.

page 8 note 3 Mem. Geol. Survey, Scotland. The geology of Arran, 1928, p. 240.

page 12 note 1 Tyrrell, for example, has indicated this departure from the normal appearance by the expression ‘cf. Brunton’. The analysis of a ‘cf. Brunton’ rock (Arran Memoir, p. 254, no. 21) shows 54.52 per cent. of silica, corresponding with the Acklington type.

page 12 note 2 Campbell, R. and Lunn, J. W., The tholeiites and dolerites of the Dalmahoy syncline. Trans. Roy. Soc. Edinburgh, 1927, vol. 55, pt. ii, no. 21, pp. 489–505.Google Scholar

page 15 note 1 The Deadwater south dike appears to be an exception to this rule.

page 16 note 1 For data of the distribution of orthoclase in plagioclase see J. H. L. Vogt, The physical chemistry of the magmatic differentiation of igneous rocks. II. On the felspar diagram. Oslo, 1926, p. 48.

page 34 note 1 G. W. Tyrrell, Arran Memoir, 1928, p. 205.

page 40 note 1 Mem. Geol. Surv. Scotland. The geology of Cowal, 1897, pp. 130 et seq. See also, The geology of mid-Argyll, 1905, p. 119.

page 40 note 2 The geology of the seaboard of mid-Argyll, 1909, p. 87, and pl. 8, fig. 2.

page 41 note 1 The ratio for the measured specimen of the Barrington dike (p. 20) is 52, but is not typical, as the rock is transitional to the Acklington type.

page 41 note 2 F. Loewinson-Lessing, On the delimitation of the families of basalts and andesites. Bull. Com. Geol. U.R.S.S., 1925, p. 411 (English abstract, p. 420).

page 41 note 3 The Whin Sill type of quartz-dolerite has a = 1.72.

page 43 note 1 A. Harker, Tertiary igneous rocks of Skye, 1904, p. 362.

page 43 note 2 O. B. Bøggild, Mineralogia Groeniandica, Kjøbenhavn, 1905.

page 43 note 3 Thomas, H. H., Certain xenohthic Tertiary minor intrusions in the Island of Mull. Quart. Journ. Geol. Soe. London, 1922, vol. 78, p. 229.Google Scholar

page 43 note 4 Judd, J. W., Quart. Journ. Geol. Soe. London, 1886, vol. 62, p. 71, and pl. 7, fig. 3.Google Scholar

page 44 note 1 A. Laeroix, La Montagne Pelée et ses éruptions, Paris, 1904, p. 505; see also J. Stansfield, Assimilation and petrogenesis, Urbana, III., U.S.A., 1928, pp. 80-81.

page 44 note 2 Tsuboi, S., Notes on miharaite. Journ. Geol. Soc. Tokyo, 1918, vol. 25, p. 47. [Min. Abstr., vol. 1, p. 209.]Google Scholar

page 44 note 3 Morey, G. W., The development of pressure in magmas as a result of crystallization. Journ. Washington Acad. Sci., 1922, vol. 12, p. 219.Google Scholar

page 46 note 1 Vogt, J. H. L., Journ. Geol. Chicago, 1921, vol. 28, p. 339, table IV.Google Scholar

page 46 note 2 J. H. L. Vogt, The physical chemistry of the magmatic differentiation of igneous rocks. II. On the felspar diagram Or: Ab : An. Skrifter Norske Vidensk. Akad. I. Mat.-Nat. Kl. Oslo, 1926, no. 4, pp. 84 and 101.

page 47 note 1 Holmes, A., The Tertiary volcanic rocks of the district of Mozambique. Quart. Journ. Geol. Soc. London, 1917, vol. 72, p. 243.Google Scholar

page 48 note 1 Fenner, C. N., The Katmai magmatic province. Journ. Geol. Chicago, 1926, vol. 34, pp. 765 et seq.Google Scholar

page 48 note 2 See Footnote 3 on pp. 49-50.

page 48 note 3 J. H. L., Vogt, Journ. Geol. Chicago, 1921, vol. 29, p. 427.Google Scholar

page 49 note 1 For a recently described case of this kind, see D. R. Grantham, Proc. Geol. Assoc. London, 1928, vol. 39, pp. 327 et seq.

page 49 note 2 Guppy, E. M. and Hawkes, L., Quart. Journ. Geol. Soc. London, 1925, vol. 81, p. 325 Google Scholar; and H. K. Cargill, L. Hawkes, and J. A. Ledeboer, ibid., 1928, vol. 84, p. 505.

page 49 note 3 In the second of the papers referred to above a ‘quartz-diorite’ from the Vestur Horn intrusion in south-east Iceland is described (p. 513). It contains both potash-felspar and plagioclase, and hypersthene is present. The authors remark, ‘The patchy distribution of the dark minerals in this rock is strongly suggestive of admixture.’ On p. 533, however, they assume the extreme magmas to be products of differentiation operating during the igneous cycle.

page 50 note 1 R. W. Bunsen, Ann. Phys. Chem. (Poggendorff), 1851, vol. 83, pp. 197-272.