Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Estrada, Solveig; Höhndorf, Axel; Henjes-Kunst, Friedhelm (2001): Tab. 1: Geochemical analysis and age dating of Kap Washington Group volcanites and related dykes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.107284, Supplement to: Estrada, S et al. (2001): Cretaceous/Tertiary volcanism in North Greenland: the Kap Washington Group. Polarforschung, 69, 17-23, hdl:10013/epic.29823.d001

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
The bimodal, alkaline volcanic suite of the Kap Washington Group (KWG) at the northern coast of Greenland was investigated during the BGR CASE 2 expedition in 1994. Geochemical and Nd and Sr isotopic data are presented for basalts to rhyolites of the KWG and of related basaltic dykes cutting Lower Paleozoic sediments. In the evd(t) vs. (87Sr/86Sr)t diagram, the KWG basalts and rhyolites follow a common mixing trend with increasing crustal contamination from basic to acid volcanites. Assimilation of pre-existing crustal rocks during formation of the rhyolitic melt is documented by Nd model ages of 0.9-1.2 Ga and by different fractionation trends for the basalts and the rhyolites in the Y vs. Zr diagram. Petrographical and geochemical features indicate intra-plate volcanism which was active most probably during a continental rifting phase. A new Rb/Sr whole rock age on rhyolites of 64 ±3 Ma, corresponding to the result of LARSEN (1982), confirms that the volcanic activity lasted until the Cretaceous-Tertiary boundary. 40Ar139Ar dating on amphibol separates from a comendite yielded strongly disturbed age spectra with a minimum age of 37.7 ±0.3 Ma. This age is interpreted to date a hydrothermal overprint of the volcanic rocks related to compressive tectonics which led to the overthrust of basement rocks over the Kap Washington Group.
Coverage:
Latitude: 83.000000 * Longitude: -40.000000
Minimum Elevation: 0.0 m * Maximum Elevation: 0.0 m
Event(s):
kap_washington_group * Latitude: 83.000000 * Longitude: -40.000000 * Elevation: 0.0 m * Method/Device: Geological sample (GEOS)
Comment:
Sr and Nd were seperated from 50-100 mg of powder using standard ion exchange techniques and analysed as metal species on a MAT261 multicollector mass spectrometer in static mode.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Sample code/labelSample labelEstrada, Solveig
2 Lithology/composition/faciesLithologyEstrada, SolveigSmear slide analysis
3 Area/localityAreaEstrada, Solveig
4 RubidiumRbmg/kgEstrada, SolveigX-ray fluorescence (XRF)
5 StrontiumSrmg/kgEstrada, SolveigInductively coupled plasma atomic emission spectroscope (ICP-AES)
6 Rubidium-87/Strontium-86 ratio87Rb/86SrEstrada, Solveig95% confidence level is +-2%
7 Strontium-87/Strontium-86 ratio87Sr/86SrEstrada, Solveig95% confidence level is +-0.06%
8 Strontium-87/Strontium-86 ratio87Sr/86SrEstrada, Solveig87Sr/86Sr - 64Ma
9 SamariumSmmg/kgEstrada, Solveig
10 NeodymiumNdmg/kgEstrada, Solveig
11 Samarium-147/Neodymium-144 ratio147Sm/144NdEstrada, SolveigCalculated
12 Neodymium-143/Neodymium-144 ratio143Nd/144NdEstrada, Solveig95% confidence level is +-0.014%
13 ε-Neodymiumε-NdEstrada, SolveigCalculatedeNd - 64 Ma
14 Age, datedAge datedkaEstrada, SolveigAge, 87Rb/87Sr Rubidium-StrontiumT DM calc. according to 2-stage model of DePaolo et al. 1991
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
454 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Sample label		2 
Lithology
(Smear slide analysis)		3 
Area		4 
Rb [mg/kg]
(X-ray fluorescence (XRF))		5 
Sr [mg/kg]
(Inductively coupled plasma at...)		6 
87Rb/86Sr
(95% confidence level is +-2%)		7 
87Sr/86Sr
(95% confidence level is +-0.06%)		8 
87Sr/86Sr
(87Sr/86Sr - 64Ma)		9 
Sm [mg/kg]		10 
Nd [mg/kg]		11 
147Sm/144Nd
(Calculated)		12 
143Nd/144Nd
(95% confidence level is +-0.014%)		13 
ε-Nd
(eNd - 64 Ma, Calculated)		14 
Age dated [ka]
(T DM calc. according to 2-sta...)
SE94/43KWG acid volcanites/rhyoliteLockwood159.922.8320.320.725060.706599.055.60.09740.515760-0.4950000
SE94/46KWG acid volcanites/rhyoliteLockwood166.721.6522.340.726270.7059617.9105.70.09850.5126090.3890000
SE94/48KWG acid volcanites/rhyoliteLockwood85.555.764.440.710550.706518.546.20.11100.512494-2.11090000
SE94/49KWG acid volcanites/rhyoliteLockwood217.218.2734.530.736920.7055315.494.30.09850.512570-0.5960000
SE94/81KWG acid volcanites/rhyolite (dyke)Lockwood150.3106.404.090.709230.705514.832.20.08990.5125990.2900000
SE94/79KWG acid volcanites/rhyolite (dyke)Lockwood155.192.824.840.709840.705445.134.00.09050.5126040.2900000
SE94/80KWG acid volcanites/rhyolite (dyke)Lockwood175.230.5316.630.719150.7046312.563.50.11900.5126170.3890000
SE94/91KWG acid volcanites/quartz-trachyteLockwood168.7256.831.900.707190.705464.931.50.09400.512536-1.11010000
SE94/93KWG acid volcanites/quartz-trachyte (dyke)Lockwood155.2194.062.320.707950.705845.534.50.09580.512419-3.41190000
SE94/68AKWG acid volcanites/trachyandesite (dyke)Lockwood15.3331.840.130.705310.705197.950.90.09350.5126170.5870000
GM94/145KWG acid volcanites/trachyteKap Kane141.6315.561.300.707450.706277.343.90.10070.512397-3.91230000
GM94/147KWG acid volcanites/comenditeKap Kane219.652.0212.240.718740.7076116.1108.20.08970.5128004.1540000
SE94/98KWG acid volcanites/comenditeKap Washington312.08.56106.430.788740.6920033.2181.20.11040.5128484.8460000
SE94/100KWG acid volcanites/comenditeKap Washington96.513.9320.120.732380.7140915.173.10.12460.5128745.2430000
SE94/108KWG acid volcanites/comenditeKap Washington115.96.4052.640.750830.7029713.575.50.10780.5128274.5500000
SE94/45KWG basic volcanites/basaltLockwood74.0391.400.550.706170.705673.721.60.10340.5126701.4800000
SE94/78KWG basic volcanites/trachybasaltLockwood104.1638.200.470.705240.704817.642.90.10640.5127042.1730000
SE94/83KWG basic volcanites/tephriteLockwood34.21152.900.090.704610.7045337.40.512723
SE94/97KWG basic volcanites/basaltLockwood36.7570.200.190.704620.704456.527.60.14220.5129135.8360000
SE94/94KWG basic volcanites/basaltLockwood51.2820.500.180.705140.7049811.453.10.12960.5128154.0540000
FTG17KWG basic volcanites/trachybasaltLockwood60.61068.400.160.705390.705246.537.60.10450.5127112.2720000
SE94/110KWG basic volcanites/basaltKap Kane13.3711.900.050.703940.703894.621.00.13320.5128785.2420000
SE94/102KWG basic volcanites/basaltKap Washington79.5487.100.470.703970.703546.029.20.12310.5128845.4400000
SE2/94BDykes in Early Paleozoic sediments/doleriteNW of Frigg Fjord30.5469.740.190.706090.705938.838.50.13730.5129246.1330000
SE28/94Dykes in Early Paleozoic sediments/olivine-doleriteW of Frigg Fjord14.7451.230.090.705750.7056633.20.512837
SE29/94Dykes in Early Paleozoic sediments/doleriteW of Frigg Fjord9.6728.360.040.708370.708348.438.10.13330.5128093.9560000
SE31/94Dykes in Early Paleozoic sediments/doleriteW of Frigg Fjord7.2747.910.030.709040.709018.740.70.12820.5128053.9570000
SE94/122Dykes in Early Paleozoic sediments/proph. basaltic dykeLuigi Amadeo20.5559.320.110.706260.706168.740.70.12820.5128995.7380000
SE11/94Greenstones/doleriteNW of Frigg Fjord6.3411.710.040.704990.704958.033.90.14260.5128845.3420000
SE13/94Greenstones/doleriteNW of Frigg Fjord22.8528.550.130.710490.710388.033.90.14210.5128725.1450000
SE14/94Greenstones/doleriteNW of Frigg Fjord4.6476.610.030.705400.705377.631.80.14320.5128765.1440000
SE15/94Greenstones/doleriteNW of Frigg Fjord19.5529.740.110.709640.7095411.249.70.13540.5128524.7480000
SE21/94Greenstones/doleriteNW of Frigg Fjord5.7621.710.030.709310.709295.823.80.14520.5128985.5400000