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Peralkaline rhyolites from the ordovician tweeddale lavas, peeblesshire, scotland
Author(s) -
Thirlwall M. F.
Publication year - 1981
Publication title -
geological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 54
eISSN - 1099-1034
pISSN - 0072-1050
DOI - 10.1002/gj.3350160104
Subject(s) - peralkaline rock , rhyolite , ordovician , geology , geochemistry , subduction , petrology , paleontology , volcanic rock , volcano , tectonics
The riebeckite‐bearing rhyolite of Winkston Hill, Peebles, is shown to be peralkaline and may be named a pantellerite. Trace element comparison with other more altered members of the Tweeddale lavas from Wrae Hill suggests that the whole suite is peralkaline. It is thought most unlikely that the suite was developed in association with an Upper Ordovician subduction zone, and it was perhaps erupted on an oceanic island.