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Tectonic relationships of the Leinster Granite, Ireland
Author(s) -
Cooper M. A.,
Brück P. M.
Publication year - 1983
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.3350180407
Subject(s) - pluton , massif , sinistral and dextral , geology , shear zone , intrusion , transpression , shear (geology) , cleavage (geology) , geochemistry , tectonics , paleozoic , clockwise , fold (higher order function) , seismology , geomorphology , petrology , paleontology , fracture (geology) , mechanical engineering , engineering
Abstract The Leinster Granite in southeast Ireland comprises five plutons, which were diapirically emplaced into the Lower Palaeozoic rocks of the Leinster Massif. The pre‐existing Caledonian cleavage was exploited during intrusion which has resulted in an en echelon development of plutons as the granite belt cuts obliquely across the regional cleavage trend. A foliation map of the Leinster Massif illustrates how the foliation trend is modified from the regional trend within a shear zone approximately coincident with the granite belt. The shear zone has a sinistral sense of shear and developed before the plutons were fully consolidated. The shear strain decreases from 5 at the northern end of the shear zone to 0·6 near its termination at the southern end of the granite.