Jökull


Jökull - 01.01.2017, Page 38

Jökull - 01.01.2017, Page 38
Holocene lavas in Bárðardalur, NE-Iceland Figure 8. (a) MgO vs. K2O (wt%) and (b) Y vs. Ba (ppm) of lava samples from the Bárðardalur region compared to whole rock analyses of basaltic products associated with the Askja volcanic system (Hartley, 2012), (c) and (d) tephra analyses from subglacial eruptions associated with the Bárðarbunga volcanic system, and (e) and (f) whole rock analyses from Veiðivötn and the Þjórsárhraun lava. Error bars are smaller than or identical to the the size of the symbols. GR: groundmass; WR: whole rock. – (a) MgO – K2O (þunga%) og (b) Y – Ba (ppm) breytileiki hrauna Bárðardals í samanburði við goseiningar Öskju. (c) og (d) gjósku úr Bárðarbungu-kerfinu. (e) og (f) sýni frá Veiðivötnum og Þjórsárhrauni. JÖKULL No. 67, 2017 33

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Jökull

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