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Petrochemistry of Paleozoic spilites of the eastern Alps (Austria)

Published online by Cambridge University Press:  01 May 2009

J. Loeschke
J. Loeschke
Affiliation:
Geologisches Institut, D-74 Tubingen, Germany
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Summary

In the Karawanken Mountains (SE Austria) spilites (pillow lavas and sills) are found intercalated in a sequence of Paleozoic slates and graywackes. The petrogenesis of these spilites is interpreted as follows: The pillow lavas and sills consolidated as mugearites and hawaiites, which were derived from an alkali olivine-basaltic magma by fractional crystallization. Under low temperature metamorphic conditions water entered into the rocks predominantly from external sources. The primary minerals (Na-Ca plagioclase, pyroxene and glass) were thus replaced either partially or completely by minerals characteristic of spilites (albite, chlorite, epidote and others). The spilites analysed are of secondary origin. They are compared with spilites and basalts of other (continental and oceanic) areas.

Type
Articles
Information
Geological Magazine , Volume 110 , Issue 1 , January 1973 , pp. 19 - 28
Copyright
Copyright © Cambridge University Press 1973

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