A 1,800-million-year-old Proterozoic gneiss terrane in Islay with implications for the crustal structure and evolution of Britain

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doi: 10.1038/335062a0
Authors:Marcantonio, Franco; Dickin, A. P.; McNutt, Robert H.; Heaman, L. M.
Author Affiliations:Primary:
McMaster Univ., Dep. Geol., Hamilton, ON, Canada
Other:
R. Ont. Mus., Canada
Volume Title:Nature (London)
Source:Nature (London), 335(6185), p.62-64. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:1988
Note:In English. 24 refs.; illus. incl. 1 table, sketch map
Summary:Isotopic, whole-rock data (Rb-Sr, Sm-Nd, Pb-Pb, U-Pb) and U-Pb data on separated zircons, are presented on Islay gneiss samples to determine their crystallization and crustal extraction ages. The results show that the Islay terrain is early Proterozoic and juvenile mantle-derived material rather than reworked Archaean crust. Implications discussed are that the Grampian terrain is probably underlain by Proterozoic basement and that N Britain can be included in the reconstruction of the Laurentian Shield. [R.K.H.]
Subjects:Absolute age; Crust; Dates; Geochronology; Gneisses; Metamorphic rocks; Nesosilicates; Orthosilicates; Paleoproterozoic; Pb/Pb; Precambrian; Proterozoic; Silicates; Sm/Nd; Tectonophysics; Terranes; U/Pb; Upper Precambrian; Zircon; Zircon group; Argyllshire Scotland; Europe; Great Britain; Hebrides; Inner Hebrides; Islay; Scotland; United Kingdom; Western Europe; Strathclyde region Scotland
Coordinates:N553500 N555500 W0060000 W0063000
Abstract Numbers:89M/0969
Record ID:1988071152
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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