Mid-Eocene renewal of magmatism in NW Scotland the Loch Roag Dyke, outer hebrides
- Amonchquite dyke, in the vicinity of Loch Roag, Lewis, Outer Hebrides has an unusually enriched chemistry, and contains a unique assemblage of megacrysts and xenoliths from the lithosphere of the Hebridean craton. A Ar-40/Ar-39 plateau age of 45.2 +/- 0.2 Ma (2 sigma) of a phlogopite megacryst from the dyke overlaps an earlier reported K-Ar age, and confirms that the British Palaeogene Igneous Province extended into the Eocene. Similar late low-volume melts were erupted in the Eocene and Oligocene in West and East Greenland, suggesting that such late-stage magmatic rejuvenescence is a widespread feature across the North Atlantic Igneous Province.
| Author details: | J. W. Faithfull, Martin Jan TimmermanORCiD, B. G. J. Upton, M. S. Rumsey |
|---|---|
| DOI: | https://doi.org/10.1144/0016-76492011-117 |
| ISSN: | 0016-7649 |
| Title of parent work (English): | Journal of the Geological Society |
| Publisher: | Geological Soc. Publ. House |
| Place of publishing: | Bath |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2012 |
| Publication year: | 2012 |
| Release date: | 2017/03/26 |
| Volume: | 169 |
| Issue: | 2 |
| Number of pages: | 4 |
| First page: | 115 |
| Last Page: | 118 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
| Peer review: | Referiert |
| Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |
