Computer Science
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979e%26psl..43..397h&link_type=abstract
Earth and Planetary Science Letters, Volume 43, Issue 3, p. 397-405.
Computer Science
Scientific paper
Deformed pillow structures are described in greenstones from the Tauern Window, Austria, confirming the presence of submarine basalts within this part of the Pennine Zone. The pillows have been subjected to a large constrictional strain, so that their shapes are still easily recognisable in sections perpendicular to the stretching direction. The pillow rims are highly enriched in epidote, whereas the cores are of more typical spilitic composition. The nature of the alteration is unlike that described from pillow basalts altered on the sea floor, and is therefore assigned to alteration during regional metamorphism. Recalculation of the analyses of rim and core suggests that additional calcium in the rim was derived by spilitisation of the core rather than by massive calcium metasomatism from outside. Intense flattening of the differentiated pillows, as is usual over most of the area studied, produced an epidote-banded greenstone in which recognisable pillow structures are largely absent.
Holland Tim J. B.
Norris James R.
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