Table 5.

Selected data for the British–Irish Palaeogene Igneous sub-province

LocalityUnitLithologyMethodMineralTypeAge (Ma)±2σMSWD (P)References*
RumCentral ComplexAlkaline pegmatiteU–PbZircon (SR314)Concordia age60.530.08Hamilton et al. (1998)
RumCentral ComplexAlkaline pegmatiteAr–ArPhlogopite (GP387)Inverse isochron61.051Hamilton et al. (1998)
RumEarly Felsic RhyodaciteRhyodaciteAr–ArPlagioclase (UDPNTLH and RDP)SGF Ideogram61.080.42Troll et al. (2008)
SkyeCuillinGabbro pegmatiteU–PbZircon (SC1/2)Concordia age58.910.06Hamilton et al. (1998)
SkyeTrachyte dykeAr–ArBiotite (GP382)Inverse isochron58.511.2Hamilton et al. (1998)
MullBasaltic lavaAr–ArWhole rock (S010)Plateau60.713.2Mussett (1986)
MullBasaltic lavaAr–ArWhole rock (78/5)Plateau61.832.8Mussett (1986)
MullBasaltic lavaAr–ArWhole rock (S023)Plateau62.132.8Mussett (1986)
MullBasaltic lavaAr–ArWhole rock (S007a)Plateau60.411.8Mussett (1986)
MullBasaltic lavaWhole rockWeighted mean (MSWD)61.11.20 (0.49)
MullLoch UisgGranophyreAr–ArWhole rock (S043)Plateau59.083.2Mussett (1986)
MullBeinn a' GhraigGranophyreAr–ArWhole rock (S019)Plateau57.211.6Mussett (1986)
MullLoch BàFelsite ring dykeAr–ArWhole rock (S020)Plateau56.72Mussett (1986)
MullBasalt dykeAr–ArWhole rock (S100Ea)Plateau57.712.2Mussett (1986)
MullVarious intrusivesWhole rockWeighted mean (MSWD)57.41.0 (0.58)
MullBasalt lavaAr–ArWhole rock (SO17)Inverse isochron62.870.482.02 (0.04)Chambers & Pringle (2001)
MullDykeAr–ArFelsic groundmass (MD3)Plateau59.290.41.68 (0.09)Chambers & Pringle (2001)
Isle of EiggEigg Lava FormationTephraAr–ArSanidine (Eigg96-1)Plateau62.551Storey et al. (2007)
Isle of MuckMuck TuffTuffAr–ArSanidine (MT2)Weighted mean61.950.16Chambers et al. (2005)
Isle of MuckMuck TuffTuffAr–ArSanidine (MT3)Weighted mean61.740.16Chambers et al. (2005)
Isle of MuckMuck TuffTuffU–PbZircon (Muck Tuff)Concordia age61.150.5Chambers et al. (2005)
AntrimUpper Basalt FormationBasalt lavaAr–ArWhole rock (Slimag)Plateau59.990.641.31 (0.25)Ganerød et al. (2010)
AntrimLower Basalt FormationBasalt lavaAr–ArWhole rock (BallyMcillroy 1200)Plateau62.610.70.14 (0.94)Ganerød et al. (2010)
AntrimLower Basalt FormationBasalt lavaAr–ArWhole rock (BallyMcillroy 2320)Plateau63.710.740.16 (0.96)Ganerød et al. (2010)
AntrimLower Basalt FormationBasalt lavaAr–ArWhole rock (BallyMcillroy 2510)Plateau64.120.680.08 (1.00)Ganerød et al. (2010)
AntrimLower Basalt FormationBasalt lavaAr–ArWhole rock (Whitehead 2)Plateau63.710.680.09 (1.00)Ganerød et al. (2010)
AntrimLower Basalt FormationBasalt lavaAr–ArWhole rock (Whitehead 3)Plateau63.330.660.03 (1.00)Ganerød et al. (2010)
AntrimLower Basalt FormationBasalt lavaAr–ArWhole rock (Binvore)Plateau63.010.680.04 (1.00)Ganerød et al. (2010)
AntrimLower Basalt FormationBasalt lavaAr–ArWhole rock (Keady Mt)Plateau62.30.660.03 (1.00)Ganerød et al. (2010)
AntrimLower Basalt FormationWhole rockWeighted mean (MSWD)63.240.61 (3.7)
AntrimScrabo HillSillAr–ArPlagioclase (Scrabo)Plateau50.220.860.36 (0.78)Ganerød et al. (2010)
AntrimTardree rhyolite ComplexRhyoliteAr–ArSanidine (Sandy Braes)Plateau60.90.26Ganerød et al. (2011)
AntrimTardree rhyolite ComplexRhyoliteAr–ArSanidine (Tardree Forest)Plateau61.020.370.71 (0.74)Ganerød et al. (2011)
AntrimTardree rhyolite ComplexSanidineWeighted mean (MSWD)60.940.21 (0.28)
AntrimTardree rhyolite ComplexRhyoliteU–PbZircon (Tardree Forest)206Pb/238U age61.320.05Ganerød et al. (2011)
Hebrides shelfHebrides terraceBasaltAr–ArWhole rock (POS241372DS2)Plateau620.81.80 (0.05)O'Connor et al. (2000)
Hebrides shelfHebrides terraceBasaltAr–ArWhole rock (POS241374DS4)Plateau52.240.81.60 (0.12)O'Connor et al. (2000)
Rockall Trough seamountsAnton DohrnBasaltAr–ArWhole rock (POS241377DS8)Plateau62.710.62.30 (0.01)O'Connor et al. (2000)
Rockall Trough seamountsAnton DohrnBasaltAr–ArWhole rock (POS241366DS3)Plateau48.811.70.20 (0.99)O'Connor et al. (2000)
Rockall Trough seamountsAnton DohrnBasaltAr–ArWhole rock (POS241364DS3)Plateau41.570.61.20 (0.31)O'Connor et al. (2000)
Rockall Trough seamountsRosemary bankBasaltAr–ArWhole rock (POS241360DS3)Plateau52.640.070.10 (0.99)O'Connor et al. (2000)
Rockall Trough seamountsRosemary bankBasaltAr–ArWhole rock (POS241362DS1D)Plateau53.750.91.90 (0.06)O'Connor et al. (2000)
Rockall Trough seamountsRosemary bankBasaltAr–ArWhole rock (POS241362DS10)Plateau53.341.52.20 (0.02)O'Connor et al. (2000)
Rockall Trough seamountsRosemary bankBasaltAr–ArWhole rock (VM28-5P452)Plateau42.780.41.00 (0.44)O'Connor et al. (2000)
LewisLewisDykeAr–ArPhlogopite (LR-299)Plateau45.910.22Faithfull et al. (2012)
Isle of ArranDrumadoonDyke (quartz porphyry)Ar–ArWhole rock (Drumadoon Dyke)Isochron59.491.6Mussett et al. (1987)
Isle of ArranDrumadoonPorphyritic rhyolite sillAr–ArK-Feldspar (DD-T)Plateau59.420.18Meade et al. (2009)
  • Weighted mean ages (recalculated after Mussett (1986), Ganerød et al. (2010) and Ganerød et al. (2011): ±2σ) and MSWD values (in parentheses) are shown in italicized bold type. Numbers/text in parentheses refers to sample numbers/text taken directly from the original source. Ages are corrected to Kuiper et al. (2008), and the 40K decay constant of Min et al. (2000).

  • SGF, single grain fusion.