Hafnium and Strontium Isotope Measurements in High-MgO Basalts from Theistareykir, Northern Iceland

Abstract

We report Hf and Sr isotope compositions from 31 samples from Theistareykir volcano, northern Iceland. The samples are high-MgO olivine tholeiites and picrites with the majority having MgO contents higher than 9 wt.%. The total range of MgO contents is from 5.5 to 22 wt.%. All samples are younger than 10,000 years and were collected from different postglacial lava flows of the Theistareykir volcano in the northern Icelandic rift zone.