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Some relations between common acid–basic associations

Published online by Cambridge University Press:  01 May 2009

M. J. Roobol
M. J. Roobol
Affiliation:
Department of Geology and Geography, University of West Indies, Kingston 7, Jamaica
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Summary

Net veined complexes and basic dykes with lobate or planar margins are commonly contained in granophyre and felsite. A study of three Tertiary centres reveals that the associations do not occur as distinct types but show gradational relations. Examples are used to illustrate a gradational morphological series. The interpretation of this series is best accounted for in terms of a basic magma invading an acid host. The factors considered capable of producing the described variations are (a) the volume of basic magma (and therefore amount of heat introduced), and (b) the degree of consolidation (ratio of crystals to melt) of the acid host.

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Type
Articles
Information
Geological Magazine , Volume 108 , Issue 6 , November 1971 , pp. 525 - 531
Copyright
Copyright © Cambridge University Press 1971

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References

Bailey, E. B. & McCallien, W. J. 1956. Composite minor intrusions and the Slieve Gullion Complex, Ireland. Lpool Mnchr geol. J. 1, 466–501.CrossRefGoogle Scholar
Blake, D. H. 1966. The net veined complex of the Austurhorn Intrusion, S. E. Iceland. J. Geol. 74, 891–907.CrossRefGoogle Scholar
Chapman, C. A. 1955. Granite replacement in basic dykes, Mt. Desert Island, Maine. Trans. Ill. St. Acad. Sci. 57, 117–25.Google Scholar
Chapman, C. A. 1962. Diabase—granite composite dykesw ith pillow-like structure, Mt. Desert Island, Maine. J. Geol. 70, 539–64.CrossRefGoogle Scholar
Elwell, R. W. D. 1958. Granophyre and hybrid pipes in a dolerite layer at Slieve Gullion. J. Geol. 66, 57–71.CrossRefGoogle Scholar
Reynolds, D. L. 1954. Fluidisation as a geological process and its bearing on the problem of intrusive granites. Am. J. Sci. 252, 577–614.CrossRefGoogle Scholar
Wager, L. R. & Bailey, E. B. 1953. Basic magma chilled against acid magma. Nature, Lond. 172, 68–9.CrossRefGoogle Scholar
Walker, G. P. L. 1969. The breaking of magma. Geol. Mag. 106, 166–73.CrossRefGoogle Scholar