Table 1.

Selected electron microprobe analyses for olivine found in lavas and tephra of the 2002–2003 Stromboli eruption

TypeRecent lavasScoriasPumices
SampleSt55St55St61St61St51St51St59St59St64St64St62St62
Sitecorerimcorerimcorerimcorerimcorerimcorerim
Analysis no.1234678910111213
DateJanuary 2003January 2003February 2003February 2003January 2002January 2002December 2002December 2002April 2003April 2003April 2003April 2003
SiO237.637.436.937.537.136.737.037.337.141.837.339.5
FeOT26.326.226.426.025.525.126.226.526.39.827.615.4
MnO0.450.460.550.520.670.600.580.64bd0.790.590.50
MgO36.436.635.135.237.036.535.535.236.147.835.544.7
CaO0.440.390.380.340.460.400.500.420.360.330.34bd
Total101.2101.099.399.5100.799.299.8100.099.9100.6101.3100.1
Fo0.700.700.690.700.710.710.690.690.700.880.690.83
Fa0.290.290.290.290.270.270.290.290.290.100.300.16
  • T=Total iron as FeO.