ORCID Profile
0000-0001-9404-5944
Current Organisation
University College Dublin
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Publisher: Springer Science and Business Media LLC
Date: 10-11-2021
Publisher: Springer Science and Business Media LLC
Date: 03-2020
Publisher: Elsevier BV
Date: 08-2020
Publisher: Elsevier BV
Date: 03-2019
Publisher: Geological Society of London
Date: 07-02-2023
DOI: 10.1144/JGS2022-039
Abstract: The Limerick Igneous Suite (LIS) in County Limerick, SW Ireland, contains two distinct basaltic igneous units: the Knockroe and Knockseefin, which are expressed as hypabyssal intrusions, porphyritic dykes, diatremes, lava flows, agglomerates and tuffs. These units make up two distinct evolutionary trends: the Knockroe igneous units which range from alkaline basalts to trachyandesites, and the Knockseefin igneous units which range from alkaline basalts to basanites. U‒Pb dating of apatite establishes a primary crystallization age of c. 350 Ma for the Knockroe units. Strontium and Nd isotopes from the least-altered Knockroe bulk rock s les range over 0.70301–0.70454 and 0.512457–0.512493, respectively. The Sr isotopes for the least-altered Knockseefin s les are similar, ranging over 0.70325–0.70386, but the Nd values are slightly more radiogenic, spanning 0.512431–0.512437. Altered s les are buffered against changes in Nd, but some show excursions towards radiogenic Sr, suggesting contamination from Carboniferous seawater and/or introduction of Rb. Rb–Sr calculations conducted on altered Knockroe s les returned ages within uncertainty of the U‒Pb dates. The bulk rock isotope values, normalized trace element plots as well as Zr/Sm, Ce/Pb and Nb/U values demonstrate the LIS is comparable to ocean island basalts and Ce/Y and Zr/Nb values suggest the units likely originated from low degrees of partial melting likely caused by extension related to the amalgamation of Laurussia and Gondwana. Supplementary material: ESM 1, whole rock geochemistry data ESM 2, apatite chemistry and geochronology data and ESM 3, supplementary figures are available at 0.6084/m9.figshare.c.6297395
Publisher: Mineralogical Association of Canada
Date: 09-2018
Publisher: Elsevier BV
Date: 2014
Publisher: Informa UK Limited
Date: 12-03-2020
Location: United States of America
No related grants have been discovered for Paul Slezak.