Table 3.

Selected data for the East Greenland sub-province

LocalityUnitLithologyMethodMineralTypeAge (Ma)±2σMSWD (P)References
Blosseville KystRømer Fjord FormationBasaltAr–ArPlagioclase (436056)Plateau55.770.5Storey et al. (2007)
Blosseville KystRømer Fjord FormationBasaltAr–ArPlagioclase (421522)Plateau56.080.9Storey et al. (2007)
Blosseville KystRømer Fjord FormationBasaltPlagioclaseWeighted mean (MSWD)55.840.43 (0.35)
Blosseville KystMilne Land FormationBasaltAr–ArPlagioclase (404107)Plateau56.790.5Storey et al. (2007)
Blosseville KystSkraenterne Formation (Top)BasaltAr–ArWhole rock (412251)Plateau55.770.5Storey et al. (2007)
Blosseville KystSkraenterne FormationBasaltAr–ArPlagioclase (436194)Plateau55.570.9Storey et al. (2007)
Blosseville KystSkraenterne FormationTephraAr–ArSanidine (421564)Plateau55.670.4Storey et al. (2007)
Blosseville KystSkraenterne FormationPlagioclase+whole rock+SanidineWeighted mean (MSWD)55.690.30 (0.1)
Blosseville KystNansen Fjord FormationBasaltAr–ArPlagioclase (426296)Plateau58.40.5Storey et al. (2007)
Blosseville KystNansen Fjord FormationBasaltAr–ArPlagioclase (194021)Inverse isochron57.492.3Storey et al. (2007)
Blosseville KystNansen Fjord FormationPlagioclaseWeighted mean (MSWD)58.360.48 (0.6)
Vindtop FormationBasaltAr–ArPlagioclase (436144)Plateau13.560.4Storey et al. (2004)
KangerdlugssuaqSkærgaardGranophyreAr–ArBiotite (SG-61 Biotite)Inverse isochron55.741.44Hirschmann et al. (1997)
KangerdlugssuaqSkærgaardGranophyreAr–ArHornblende (SG-61 Hornblende)Inverse isochron55.821.52Hirschmann et al. (1997)
KangerdlugssuaqSkærgaardAr–ArWeighted mean (MSWD)55.81.00 (0.01)
IgtutarajikGabbroic pegmatiteAr–ArBiotite (I-7)Plateau47.90.4Tegner et al. (1998)
Sorgenfri GletscherDiabase sillAr–ArPlagioclase (413907)Plateau57.070.8Tegner et al. (1998)
SkjoldungenBasaltic dykeAr–ArPlagioclase (940211)Plateau62.151Storey et al. (2007)
TugtilikDyke (silico-carbonatite)Ar–ArBiotite (417150)Plateau59.010.9Storey et al. (2007)
TugtilikDyke (silico-carbonatite)Ar–ArBiotite (417151)Inverse isochron58.21.2Storey et al. (2007)
TugtilikDyke (silico-carbonatite)Weighted mean (MSWD)58.74.90 (1.17)
KangerlussuaqBiotite graniteAr–ArBiotite (333132)Inverse isochron47.190.92.40 (0.05)Tegner et al. (2008)
KangerlussuaqKangerlussuaqSyenite intrusionAr–ArBiotite (EG4583)Inverse isochron51.441.10.50 (0.81)Tegner et al. (2008)
KærvenGabbroAr–ArBiotite (85659)Inverse isochron55.791.40.80 (0.52)Tegner et al. (2008)
KærvenAlkali graniteAr–ArAmphibole (40160)Inverse isochron53.461.32.30 (0.08)Tegner et al. (2008)
Kap DaltonIgtertivâ FormationBasaltAr–ArGroundmass (116344)Plateau49.090.480.95 (0.45)Larsen et al. (2013)
Kap DaltonIgtertivâ FormationBasaltAr–ArPlagioclase (475269)Plateau43.771.080.12 (0.99)Larsen et al. (2013)
Lille PendulumLower Plateau Lava SeriesBasaltAr–ArPlagioclase (194233)Plateau55.420.920.07 (1.00)Larsen et al. (2014)
Blasedal (WF)Lower Plateau Lava SeriesBasaltAr–ArPlagioclase (194187)Plateau53.80.760.43 (0.86)Larsen et al. (2014)
Blæsedal (WF)Lower Plateau Lava SeriesBasaltAr–ArGroundmass (194194)Plateau55.020.490.17 (0.98)Larsen et al. (2014)
Kap Stosch (HWH)Lower Plateau Lava SeriesBasaltAr–ArPlagioclase (95346)Plateau54.160.720.53 (0.83)Larsen et al. (2014)
Tværelv (HWH)Lower Plateau Lava SeriesBasaltAr–ArGroundmass (517303)Plateau55.520.680.12 (1.00)Larsen et al. (2014)
Kap Mackenzie (GSØ)Lower Plateau Lava SeriesBasaltAr–ArPlagioclase (239531)Plateau53.540.670.04 (1.00)Larsen et al. (2014)
Tobias Dal (HWH)Upper Plateau Lava SeriesBasaltAr–ArPlagioclase (194150)Plateau56.510.490.39 (0.94)Larsen et al. (2014)
Bontekoe ØUpper Plateau Lava SeriesHawaiiteAr–ArGroundmass (1980.274)Plateau55.170.350.18 (0.99)Larsen et al. (2014)
Louise Boyd LandInland nunatak zoneAlkaline lavaAr–ArWhole rock (421302)Inverse isochron49.81.381.83 (0.08)Larsen et al. (2014)
Hobbs LandInland nunatak zoneAlkaline lavaAr–ArGlass (452434)Inverse isochron53.41.832.20 (0.05)Larsen et al. (2014)
ShannonBasalt sillAr–ArPlagioclase (194196)Plateau51.850.550.15 (1.00)Larsen et al. (2014)
Bass Rock (LP)Basalt sillAr–ArPlagioclase (194207)Plateau53.710.620.19 (1.00)Larsen et al. (2014)
Kefersteinberg (SØ)sillAr–ArPlagioclase (517355)Plateau53.980.390.10 (1.00)Larsen et al. (2014)
HvalrosøPegmatiteAr–ArK-Feldspar (475286)Plateau20.310.120.27 (0.99)Larsen et al. (2014)
Freycinet Bjerg (GSØ)Basalt sillAr–ArPlagioclase (239539)Plateau52.580.660.95 (0.48)Larsen et al. (2014)
Traill Ø south coastBasalt sillAr–ArPlagioclase (239578)Plateau55.140.370.74 (0.67)Larsen et al. (2014)
Dronning Augusta Dal (WF)Basalt dykeAr–ArPlagioclase (475289)Plateau53.681.590.19 (0.94)Larsen et al. (2014)
Bontekoe ØBasalt dykeAr–ArPlagioclase (517310)Plateau51.271.210.05 (1.00)Larsen et al. (2014)
Kap Broer Ruys felsiteFelsiteAr–ArK-Feldspar (228078)Plateau48.710.510.68 (0.82)Larsen et al. (2014)
  • Weighted mean ages (recalculated after Hirschmann et al. (1997) and Storey et al. (2007): ±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).