Jökull - 01.01.2017, Page 31

Svavarsdóttir et al.
Table 2. Sr-Nd-Hf-Pb-isotopic data of Holocene lavas from the Bárðardalur region, Bárðarbunga basement
rocks and volcanic units north of Vatnajökull. – Samsætugreiningar goseininga úr Bárðardal og svæðinu
norður af Vatnajökli.
Sample 87Sr/86Sr
±2 SE
143Nd/144Nd
±2 SE
176Hf/177Hf
±2 SE
206Pb/204Pb
±2 SE
207Pb/204Pb
±2 SE
208Pb/204Pb
±2 SE
Basement rocks of Bárðarbunga
SAL301 0.703080±18 0.283227±5 18.305±15 15.470±16 37.994±30
SAL304 0.703100±15 0.513052±10 0.283234±5 18.379±11 15.457±10 38.057±27
SAL307 0.703154±14 0.513096±16 0.283211±4 18.466±7 15.462±7 38.151±17
SAL309 0.703081±18 0.513055±18 0.283203±7 18.282±18 15.500±30 38.045±65
SAL312 0.70307*±16 0.513074*±15 0.283207±5 18.457±8 15.472±11 38.164±25
Dyngjuháls
NAL484a 0.703141±14 0.513043±10 18.395±13 15.464±15 38.085±38
NAL484b 0.703112±20
NAL485 0.703134±15
NAL486 0.703221±18 0.513051±12 18.469±20 15.485±39 38.207±70
NAL490 0.703139±15 0.513048±17 0.283225±5 18.413±13 15.467±20 38.122±50
NAL491 0.703061±19 0.513127±11 0.283222±5 18.341±12 15.449±10 38.017±28
NAL495 0.703099±15 0.513100±13 0.283218±5 18.406±16 15.459±16 38.106±41
NAL499 0.703141±17 0.513064±16 0.283211±6 18.428±18 15.457±9 38.111±24
Gígöldur
NAL451 0.703201±14 0.513061±10 0.283219±4 18.3948±8 15.4737±7 38.117±22
NAL450 0.703203±11 0.513049±11 0.283218±4 18.3993±7 15.4737±8 38.124±19
NAL308 0.703196±12 0.513081±6 18.3982±10 15.4843±9 38.155±30
Bárðardalur
B15-01wr 0.703200±9 0.513085±8 0.283212±4 18.4118±30 15.4871±43 38.1753±119
B15-02wr 0.703094±15 0.513087±11 0.283214±4 18.4285±26 15.4711±25 38.1487±70
B15-02gr 0.703253±14 0.283237±4 18.3880±13 15.4606±12 38.0969±29
B15-04gr 0.703062±18 0.283234±5 18.3471±13 15.4583±13 38.0436±35
B15-05wr 0.703078±10 0.513097±18 0.283254±5 18.3371±35 15.4764±34 38.0768±101
B15-09gr 0.703090±9 0.513100±13 0.283211±5 18.4072±31 15.4929±37 38.1997±138
B15-10gr 0.703497±14 0.283244±5 18.3226±12 15.4690±10 38.0429±29
B15-12wr 0.703055±18 0.513122±9 0.283223±7 18.3039±43 15.4630±32 38.0094±82
B15-16gr 0.703077±17 0.513085±11 0.283206±4 18.3968±40 15.4917±30 38.2070±101
NAL664 0.703089*±14 0.513058*±10 0.283222±5 18.3632±38 15.4616±32 38.0679±79
Reference material
Internal
SRM987 n=38** 0.710259±15
La Jolla n=26 0.511866±22
JMC-475 n=19 0.282162±28
SRM981 n=38 16.9399±20 15.4949±14 36.7203±44
Rock Standards
JB-3 0.703420±20
(n=5)
0.513064±21
(n=3)
0.283256±7
(n=3)
18.2897±60
(n=3)
15.5391±67 38.2561±188
*data from Sigmarsson and Halldórsson (2015). **number of analyses run with samples
Internal errors (standard error: ±2SE) for Sr-, Nd-, Hf-and Pb-isotopic ratios are given on the last significant digits.
External errors (standard deviation: ±2SD) is given for the international rock standard JB-3.
Number of JB-3 analyses run with samples is given after each standard deviation value.
26 JÖKULL No. 67, 2017