| Garrison, Jennifer M., Sims, Kenneth W. W., Yogodzinski, Gene M., Escobar, Ricardo D., Scott, Sean, Mothes, Patricia, Hall, Minard L., Ramon, Patricio (2018) Shallow-level differentiation of phonolitic lavas from Sumaco Volcano, Ecuador. Contributions to Mineralogy and Petrology, 173 (1) doi:10.1007/s00410-017-1431-4 | Journal (article/letter/editorial) | differentiation of phonolitic lavas from Sumaco Volcano, Ecuador Jennifer M. Garrison1 · Kenneth W. W. Sims2...Springer Nature 2018 Abstract Sumaco Volcano is located in the rear-arc of Ecuador and produces phonolitic...shallow depths in highly oxidizing conditions. The Sumaco mineral assemblages and geochemistry indicate that...that its unique magma source is confined to this volcano. The high temperature and sulfate-saturated conditions...An important conclusion of this research is that Sumaco does not represent typical rear-arc subduction | | | Book | minerals expressed in combined norms Spinel Pleonast Hercynite Uivospinel Perovskite Sphene (Titanite) Cossyrite...following calculations, magnetite, ilmenite and hercynite will be given separately. They may be added, if...melilite and co-existent minerals (perovskite, hercynite, kalsilite, new olivine, etc.) was developed....completely into melilite, olivine, perovskite and hercynite, the amount of silica (L Qm) that becomes available...the top of the magma column within the vent of a volcano by gravitative or complex differentiation of the |
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