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The Dusky Apatites of the Eskdale (Cumberland) Granite

Published online by Cambridge University Press:  01 May 2009

Brian Simpson
Brian Simpson
Affiliation:
University College, Swansea
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Extract

A Patite was first recorded from the Eskdale granite by R. H. Rastall and W. H. Wilcockson in 1915 (I).1 Recently, the author, in carrying out work on the granite, has noticed the peculiar character of the apatites, in that they are mostly of a dusky type occasioned by the presence of large amounts of finely-divided inclusions. Similar apatites have been recorded from the Leinster granite (2), Gault Clay, Thanet Sands, Chausey Islands (3), Jersey (4), the Old Red Sandstone of the Cardiff District (5), and the Dublin district (6), but nearly all show a sharply defined core. The Eskdale ones, although presenting a dense centre, show no clear-cut division between the core and the outer zone of the apatite. Invariably the outer zone of the apatite carries some inclusions.

Type
Original Articles
Information
Geological Magazine , Volume 70 , Issue 8 , August 1933 , pp. 375 - 378
Copyright
Copyright © Cambridge University Press 1933

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References

BIBLIOGRAPHY

(1)Rastall, R. H. and Wilcockson, W. H., Quart. Jour. Geol. Soc., lxxi, 1915, 607–8.Google Scholar
(2)Flett, W. F. and Smithson, F., Geol. Mag., LXV, 1928, 14–19.Google Scholar
(3)Groves, A. W. and Mourant, A. E., Min. Mag., xxii, 1929, 92–99.Google Scholar
(4)Groves, A. W., Geol. Mag., LXIV, 1927, 244–9.Google Scholar
(5)Heard, H. and Davies, R., Quart. Jour. Geol. Soc., lxxx, 1924, 505.Google Scholar
(6)Smithson, F. G., Geol. Mag., LXV, 1928, 14–19.Google Scholar
(7)op. cit. 3.Google Scholar