{"title":"A reliable age for the Louisburgh-Clare Island succession and its significance in the stabilisation of the Laurentian margin in Ireland","authors":"J. R. Graham, N. Riggs, B. McConnell","doi":"10.3318/ijes.2020.38.2","DOIUrl":null,"url":null,"abstract":"Abstract:The Louisburgh-Clare Island succession is a sequence of non-marine sedimentary rocks that forms one element of the complex geology along the Fair Head-Clew Bay Line in western Ireland. A first reliable age for the succession is provided by U-Pb dating of zircon from a tuff within the Strake Banded Formation by LA-ICP-MS, giving an age of 423 ± 4Ma (Silurian: Ludfordian or Pridoli). This age indicates that the Louisburgh-Clare Island succession is younger than the other Silurian successions in the west of Ireland. It also better places the succession in a geological history of terrane accretion and basin evolution along the southeast Laurentian margin. The Strake Banded Formation displays a post-Ludfordian cleavage whereas mainly brittle deformation is seen in early to mid-Devonian sedimentary basins along strike.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":"38 1","pages":"14 - 5"},"PeriodicalIF":0.0000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Irish Journal of Earth Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3318/ijes.2020.38.2","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}
引用次数: 1
Abstract
Abstract:The Louisburgh-Clare Island succession is a sequence of non-marine sedimentary rocks that forms one element of the complex geology along the Fair Head-Clew Bay Line in western Ireland. A first reliable age for the succession is provided by U-Pb dating of zircon from a tuff within the Strake Banded Formation by LA-ICP-MS, giving an age of 423 ± 4Ma (Silurian: Ludfordian or Pridoli). This age indicates that the Louisburgh-Clare Island succession is younger than the other Silurian successions in the west of Ireland. It also better places the succession in a geological history of terrane accretion and basin evolution along the southeast Laurentian margin. The Strake Banded Formation displays a post-Ludfordian cleavage whereas mainly brittle deformation is seen in early to mid-Devonian sedimentary basins along strike.
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