The Geldingadal lava field is dilated and contains the following minerals (sorted by quantity): plagioclase> olivine> clinopyroxene> spinel (Figure 1). The lava has a combination of olivine tholeiite with Mg # = 60.1. The chemical composition of the rock approaches the composition of the most primitive magma that has erupted on the peninsula in Modern times.
Preliminary results from calculations with geological thermometers indicate that the temperature of the magma is 1180-1190 ° C when it comes to the surface. Plagioclase, agitate and olivine small particles crystallize in equilibrium with prey in the basic magma chamber, which is in accordance with geophysical observations. However, the magma itself originates from a much greater depth (probably from the boundary of the crust and mantle), which indicates that the corridor draws magma from a much deeper magma reservoir.
A more detailed report with the main composition of rock and minerals can be found here
Trace element and isotope analyzes are coming soon!
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