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Type: Journal article
Title: Provenance and age constraints of the South Stack Group, Anglesey, UK: U-Pb SIMS detrital zircon data
Author: Collins, A.
Buchan, C.
Citation: Journal of the Geological Society, 2004; 161(5):743-746
Publisher: Geological Soc Publ House
Issue Date: 2004
ISSN: 0016-7649
Statement of
Alan S. Collins & Craig Buchan
Abstract: U–Th–Pb Secondary Ion Mass Spectrometry (SIMS) data from detrital zircons extracted from the South Stack Group, Anglesey, UK, indicate that: (1) the maximum depositional age of the Holyhead Formation (South Stack Group, Monian Supergroup) is 501 ± 10 Ma; (2) the Monian Supergroup was deposited between c. 500 and 475 Ma and is part of the Cambrian–Lower Ordovician succession found in southern Britain and Ireland; (3) Avalonia was a major sediment source (age maxima at 543–552 and 604–627 Ma); (4) Amazonia probably also provided zircons (common Neoarchaean–Mesoproterozoic grains) weakening suggestions that Avalonia had rifted off Gondwana by Cambrian times.
Keywords: Anglesey
Rights: Copyright © 2004 Geological Society of London
DOI: 10.1144/0016-764904-036
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