Hostname: page-component-848d4c4894-4hhp2 Total loading time: 0 Render date: 2024-05-17T14:28:16.350Z Has data issue: false hasContentIssue false
  • English
  • Français

On the Age Relations of the Connemara Migmatites and the Galway Granite, West of Ireland

Published online by Cambridge University Press:  01 May 2009

B. E. Leake  and
P. J. Leggo
B. E. Leake
Affiliation:
Geology Department, University, Bristol 8.
P. J. Leggo
Affiliation:
Geology Department, University, Bristol 8.
Get access Rights & Permissions [Opens in a new window]

Abstract

Contrary to a previously published view, evidence is given to show that the Galway Granite is entirely later than both the quartzandesine migmatization and the potash-felspar migmatization in Connemara, and that the Oughterard Granite is probably earlier than the Galway Granite, not later. There is also strong evidence against regarding the foliated marginal granite of the north and north-east border of the Galway Granite as being different in origin from the marginal granite often found in the southern, western, and north-western borders. These results agree with the radio-chemical date of 365 m.y. determined for part of the Galway Granite.

Type
Articles
Information
Geological Magazine , Volume 100 , Issue 3 , June 1963 , pp. 193 - 204
Copyright
Copyright © Cambridge University Press 1963

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

REFERENCES

Barth, T. F. W., 1956. Studies in gneiss and granite. Skr. Norske Vid.-Akad. Oslo, Nat. Nat. Kl. I, 3–16.Google Scholar
Burke, K., 1957. An outline of the structure of the Galway Granite. Geol. Mag., 94, 452–464.CrossRefGoogle Scholar
Dewey, J. F., 1961. A note concerning the age of the metamorphism of the Dalradian rocks of Western Ireland. Geol. Mag. 98, 399–405.CrossRefGoogle Scholar
Farah, , 1960. Gravity observations on the north-western border of the Galway Granite. Unpublished M.Sc. thesis, Birmingham University.Google Scholar
Giletti, B. J., Moorbath, S., and Lambert, R. S. J., 1961. A Geochronological study of the metamorphic complexes of the Scottish Highlands. Quart. J. geol. Soc. Lond., 117, 233–272.CrossRefGoogle Scholar
Leake, B. E., 1958. The Cashel-Lough Wheelaun Intrusion, Co. Galway. Proc. roy. Irish Acad., 59B, 155–203.Google Scholar
McKie, D. and Burke, K., 1955. The Geology of the islands of South Connemara. Geol. Mag., 92, 487–498.CrossRefGoogle Scholar
Murphy, T., 1952. Measurements of Gravity in Ireland. Gravity Survey of Central Ireland. Dublin Inst. Adv. Stud. Geophys. Mem., 2, Part 3.Google Scholar
Rothstein, A. T. V., 1957. The Dawros Peridotite, Connemara, Eire. Quart. J. geol. Soc. Lond., 113, 1–25.CrossRefGoogle Scholar
Wager, L. R. and Andrew, G., 1930. The age of the Connemara schists and their metamorphism. Geol. Mag., 67, 271–5.CrossRefGoogle Scholar
Wager, L. R. and Andrew, G., 1932. The Geology of the Roundstone District, County Galway. Proc. roy. Irish Acad., 41B, 46–72.Google Scholar
Winkler, H. G. F., 1961. On coexisting felspars and their temperatures of crystallization. Instit. “Lucas Mallada” C.S.I.C. (Spain) Cursillos y Conferen Fasc., 8, 9–13.Google Scholar
Wright, P. C., 1961. The Petrology and geochemistry of the Galway Granite of the Carna district, Connemara, Eire. Unpub. Ph.D. thesis, Bristol.Google Scholar