Show simple item record

dc.contributor.authorClift, Peter D.  Concept link
dc.contributor.authorCarter, Andrew  Concept link
dc.contributor.authorDraut, Amy E.  Concept link
dc.contributor.authorLong, Hoang Van  Concept link
dc.contributor.authorChew, David M.  Concept link
dc.contributor.authorSchouten, Hans A.  Concept link
dc.date.accessioned2010-01-20T18:58:43Z
dc.date.available2010-01-20T18:58:43Z
dc.date.issued2008-04-15
dc.identifier.urihttps://hdl.handle.net/1912/3132
dc.descriptionAuthor Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Tectonophysics 479 (2009): 165-174, doi:10.1016/j.tecto.2008.07.018.en_US
dc.description.abstractThe Early Ordovician Grampian Orogeny in the British Isles represents a classic example of collision between an oceanic island arc and a passive continental margin, starting around 480 Ma. The South Mayo Trough in western Ireland preserves a complete and well-dated sedimentary record of arc collision. We sampled sandstones and conglomerates from the Rosroe, Maumtrasna and Derryveeny Formations in order to assess erosion rates and patterns during and after arc collision. U-Pb dating of zircons reveals a provenance dominated by erosion from the upper levels of the Dalradian Supergroup (Southern Highland and Argyll Groups), with up to 20% influx from the colliding arc into the Rosroe Formation, but only 6% in the Maumtrasna Formation (~465 Ma). The 24 dominant source regions lay to the northeast (e.g. in the vicinity of the Ox Mountains, 50 km distant, along strike). The older portions of the North Mayo Dalradian and its depositional basement (the Annagh Gneiss Complex) do not appear to have been important sources, while the Connemara Dalradian only plays a part after 460 Ma, when it supplies the Derryveeny Formation. By this time all erosion from the arc had effectively ceased and exhumation rates had slowed greatly. The Irish Grampian Orogeny parallels the modern Taiwan collision in showing little role for the colliding arc in the production of sediment. Negligible volumes of arc crust are lost because of erosion during accretion to the continental margin.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1016/j.tecto.2008.07.018
dc.subjectCollisionen_US
dc.subjectErosionen_US
dc.subjectZirconen_US
dc.subjectCaledonidesen_US
dc.subjectGrampianen_US
dc.titleDetrital U–Pb zircon dating of lower Ordovician syn-arc-continent collision conglomerates in the Irish Caledonidesen_US
dc.typePreprinten_US


Files in this item

Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record