{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T12:12:22Z","timestamp":1773231142094,"version":"3.50.1"},"reference-count":81,"publisher":"Geological Society of London","issue":"5","license":[{"start":{"date-parts":[[2010,8,23]],"date-time":"2010-08-23T00:00:00Z","timestamp":1282521600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JGS"],"published-print":{"date-parts":[[2010,9]]},"abstract":"<jats:title>Abstract:<\/jats:title>\n          <jats:p>\n            Metasediments of the early Dalradian Grampian Group (Erris Group) and probable equivalents (Inishkea Division) structurally overlie Palaeoproterozoic to Neoproterozoic Annagh Gneiss Complex orthogneisses in NW Mayo, Ireland. Sm\u2013Nd isotopic data suggest a Palaeoproterozoic source for the metasediments. K-feldspar and granitoid clasts from the Doonamo Formation, Erris Group, record U\u2013Pb zircon ages of\n            <jats:italic>c<\/jats:italic>\n            . 1740 Ma and\n            <jats:italic>c<\/jats:italic>\n            . 980 Ma, respectively. These ages are within error of the\n            <jats:italic>c<\/jats:italic>\n            . 1730\u20131750 Ma Mullet gneisses and\n            <jats:italic>c<\/jats:italic>\n            . 990 Ma Grenvillian migmatitic leucosomes in the underlying Annagh Gneiss Complex. U\u2013Pb detrital zircon data reveal that the Erris Group was deposited after\n            <jats:italic>c<\/jats:italic>\n            . 955 Ma, with predominant input from\n            <jats:italic>c<\/jats:italic>\n            . 1640,\n            <jats:italic>c<\/jats:italic>\n            . 1500 and\n            <jats:italic>c<\/jats:italic>\n            . 990 Ma interpreted Laurentian sources (Labradorian, Pinwarian and Grenvillian terranes, respectively). Limited detrital zircon data from the Inishkea Division yield similarly aged detritus and a tentative maximum depositional age of\n            <jats:italic>c<\/jats:italic>\n            . 1005 Ma. Correlation of both sequences with the Scottish Dalradian Grampian Group is considered valid based on detrital zircon U\u2013Pb and whole-rock Sm\u2013Nd data. The clast ages support the hypothesis that the Dalradian unconformably overlies the Annagh Gneiss Complex in north Mayo, whereas the detrital zircon data imply more distal Laurentian sources. Dalradian deposition is thereby tied to the margins of Laurentia.\n          <\/jats:p>\n          <jats:sec>\n            <jats:title>Supplementary material:<\/jats:title>\n            <jats:p>\n              U\u2013Pb zircon (secondary ion mass spectrometry) data and descriptions of dated zircon grains are available at\n              <jats:uri xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"http:\/\/www.geolsoc.org.uk\/SUP18414\" xlink:type=\"simple\">http:\/\/www.geolsoc.org.uk\/SUP18414<\/jats:uri>\n              .\n            <\/jats:p>\n          <\/jats:sec>","DOI":"10.1144\/0016-76492009-147","type":"journal-article","created":{"date-parts":[[2010,8,23]],"date-time":"2010-08-23T15:58:05Z","timestamp":1282579085000},"page":"1033-1048","source":"Crossref","is-referenced-by-count":22,"title":["A Laurentian provenance for the Dalradian rocks of north Mayo, Ireland, and evidence for an original basement\u2013cover contact with the underlying Annagh Gneiss Complex"],"prefix":"10.1144","volume":"167","author":[{"given":"Claire A.","family":"McAteer","sequence":"first","affiliation":[{"name":"UCD School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland"}]},{"given":"J.Stephen","family":"Daly","sequence":"additional","affiliation":[{"name":"UCD School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland"}]},{"given":"Michael J.","family":"Flowerdew","sequence":"additional","affiliation":[{"name":"British Antarctic Survey, High Cross, Madingley Road, Camfbridge CB3 0ET, UK"}]},{"given":"Martin J.","family":"Whitehouse","sequence":"additional","affiliation":[{"name":"Laboratory for Isotope Geology, Swedish Museum of Natural History, S-104 05, Stockholm, Sweden"}]},{"given":"Chris L.","family":"Kirkland","sequence":"additional","affiliation":[{"name":"Laboratory for Isotope Geology, Swedish Museum of Natural History, S-104 05, Stockholm, 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