Hostname: page-component-8448b6f56d-42gr6 Total loading time: 0 Render date: 2024-04-24T20:10:06.385Z Has data issue: false hasContentIssue false
  • English
  • Français

Metasomatic reaction between acid pegmatite and orthopyroxenite at Currywongaun, Connemara, Ireland

Published online by Cambridge University Press:  05 July 2018

R. Kanaris-Sotiriou  and
N. S. Angus
R. Kanaris-Sotiriou
Affiliation:
Department of Geology, The University, Sheffield S1 3JD
N. S. Angus
Affiliation:
Department of Geology, The University, Hull HU6 7RX
Get access Rights & Permissions [Opens in a new window]

Summary

Late-stage acid pegmatites veining the predominantly ultrabasic Currywongaun-Doughruagh intrusion are frequently associated with amphibole-rich reaction borders in the adjacent wall-rocks. The chemical and mineralogical changes resulting from reaction between an acid pegmatite vein and the orthopyroxenite wall-rock are assessed from chemical analyses of rocks and microprobe analyses of the amphiboles forming the zoned reaction border. The main chemical change was the addition of H2O to the wall-rock; otherwise the formation of the anthophyllite and hornblende of the reaction border from pyroxene was virtually isochemical. Enrichment in other chemical species, notably Ca and AI, was restricted to the region close to the interface between the reactants. This inhibited style of reaction is attributed to the initial marginal crystallization of the acid pegmatite melt acting as a barrier to subsequent metasomatic interchange.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 328 , December 1979 , pp. 473 - 478
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

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

Carswell, (D. A.), Curtis, (C. D.), and Kanaris-Sotiriou, (R.), 1974. J. Petrol. 15, 383-402.CrossRefGoogle Scholar
Curtis, (C. D.) and Brown, (P. E.), 1969. Contrib. Mineral. Petrol. 24, 275-92.CrossRefGoogle Scholar
Curtis, (C. D.) and Brown, (P. E.) 1971. Contrib. Mineral. Petrol. 31, 87-93.CrossRefGoogle Scholar
Kanaris-Sotiriou, (R.) and Angus, (N. S.), 1976. J. Geol. Soc. Lond. 132, 485-508.CrossRefGoogle Scholar
Kanaris-Sotiriou, (R.) and Angus, (N. S.) Gibb, (F. G. F.), Carswell, (D. A.), and Curtis, (C. D.), 1978. Contrib. Mineral. Petrol. 67, 289-95.CrossRefGoogle Scholar