The depositional age of the Dalradian Supergroup; U-Pb and Sm-Nd isotopic studies of the Tayvallich Volcanics, Scotland

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doi: 10.1144/gsjgs.146.1.0003
Authors:Halliday, A. N.; Graham, C. M.; Aftalion, M.; Dymoke, P.
Author Affiliations:Primary:
Scott. Univ. Res. and Reactor Cent., Glasgow, United Kingdom
Other:
Univ. Edinburgh, United Kingdom
Univ. Mich., United States
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, 146(1), p.3-6. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1989
Note:In English. 35 refs.; illus. incl. 2 tables, geol. sketch map
Summary:Zircons from a keratophyre associated with the Tayvallich volcanic rocks in the Dalradian of the SW Scottish Highlands gave a U/Pb age of 595 +- 4 m.y. This is taken to indicate that most or all of the Dalradian is of Precambrian age and that Dalradian sedimentation may have lasted for approx 200 m.y. The age also constrains the time interval between cessation of Dalradian sedimentation and subsequent crustal thickening and regional metamorphism during the Grampian orogeny. Sm-Nd isotopic data give epsilonnd values of +2 to +4, which are thought to reflect the effects of melting of lithospheric mantle. [R.A.H.]
Subjects:Absolute age; Actinides; Dalradian; Dates; Geochronology; Grampian Orogeny; Lead; Metals; Neodymium; Nesosilicates; Ordovician; Orthosilicates; Paleozoic; Precambrian; Rare earths; Samarium; Silicates; Sm/Nd; U/Pb; Uranium; Zircon; Zircon group; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Appin Group; Argyll Group; Southern Highland Group; Tayvallich Volcanics
Abstract Numbers:89M/2685
Record ID:1989062417
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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