Crystals reveal magma convection and melt transport in dyke-fed eruptions

摘要

X-Ray compositional maps of magnesium (Mg), iron (Fe), phosphorous (P), and nickel (Ni) of two olivine crystals from the early tephra (sample 1537). The crystals have different core compositions and core to rim patterns, but they both have repetitive and thin zoning of the shown elements. We interpret the zoning to be the result of fast growth within a highly dynamic environment.