Large-scale, linked drainage systems in the NW European Triassic: insights from the Pb isotopic composition of detrital K-feldspar

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Show simple item record Tyrrell, Shane Souders, A. Kate Daly, J. Stephen Shannon, Patrick M. Haughton, Peter D. W. 2012-09-05T15:19:26Z 2012-09-05T15:19:26Z 2012 The Geological Society of London en 2012-05
dc.identifier.citation Journal of the Geological Society of London en
dc.description.abstract Pb isotopic data from K-feldspars in Middle Triassic (Anisian) sandstones in the Wessex Basin, onshore southwest UK, and the East Irish Sea Basin, some to the north, show that the same grain populations are present. This indicates that the drainage system (the “Budleighensis” River) feeding these basins originated from the same source/s, most probably the remnant Variscan Uplands to the south. Fluvial and aeolian sandstones have the same provenance, suggesting that if water- and wind-driven sands were originally derived from different sources, this has been obscured through reworking prior to final deposition. Significant recycling of feldspar from arkosic sandstones in earlier sedimentary basins can be ruled out. The provenance data agree with previous depositional models, indicating transport distances in excess of , with a drainage pattern that linked separate basins. This supports the idea that the regional fluvial system was driven by topography and episodic flooding events of sufficient magnitude to overcome evaporation and infiltration over hundred’s of kilometres. Importantly, this drainage system appears to have been isolated and independent from those operating contemporaneously to the northwest of the Irish and Scottish massifs, where the remnant Variscan Uplands apparently exerted no influence on drainage or sand supply. en
dc.description.sponsorship Science Foundation Ireland en
dc.language.iso en en
dc.publisher The Geological Society en
dc.subject Triassic en
dc.subject Provenance en
dc.subject Feldspar en
dc.subject Fluvial en
dc.subject.lcsh Fluvial geomorphology en
dc.subject.lcsh Geology, Stratigraphic--Triassic en
dc.subject.lcsh Feldspar en
dc.title Large-scale, linked drainage systems in the NW European Triassic: insights from the Pb isotopic composition of detrital K-feldspar en
dc.title.alternative Palaeodrainage in the NW European Triassic en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.status Peer reviewed en
dc.identifier.volume 169 en
dc.identifier.issue 3 en
dc.identifier.startpage 279 en
dc.identifier.endpage 295 en
dc.identifier.doi 10.1144/0016-76492011-104
dc.neeo.contributor Tyrrell|Shane|aut|
dc.neeo.contributor Souders|A. Kate|aut|
dc.neeo.contributor Daly|J. Stephen|aut|
dc.neeo.contributor Shannon|Patrick M.|aut|
dc.neeo.contributor Haughton|Peter D. W.|aut|
dc.description.othersponsorship Griffiths Geoscience Award en

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