Metadolerite age relationships in the Dalradian of northwest Donegal, Ireland and their orogenic significance

Autor: D. H. W. Hutton
Rok vydání: 2007
Předmět:
Zdroj: Geological Journal. 14:171-178
ISSN: 1099-1034
0072-1050
DOI: 10.1002/gj.3350140113
Popis: The structural relationships of several intrusive sheets belonging to the extensive metadolerite suite of the Appin (lower) Dalradian rocks of the Creeslough area, northwest Donegal, Ireland have been examined. It is concluded that, relative to the regional chronology of deformation of the enclosing metasediments, sheet emplacement has occurred: pre-D2; syn-D2; between D2 and D3; and syn-D3. The height of activity came in the post-D2, pre-D3 interval and coincided with the peak of regional metamorphism in the area. These relationships in Donegal are compared with those of the pretectonic basic rocks of the southwest Highlands and models are discussed.
Databáze: OpenAIRE
Externí odkaz: