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Populations Of Major Phases In Glacier Peak Lavas, Charlotte Wall
Populations Of Major Phases In Glacier Peak Lavas, Charlotte Wall
Geology Graduate and Undergraduate Student Scholarship
Volcanoes can be studied through minerals that are present in their eruption products. These minerals can be studied through optical microscopy and geochemistry to better understand their origins and provide insight into which processes took place prior to eruption (i.e., fractionation of crystals, assimilation of the surrounding crust, magma mixing). In this study I examine mineral populations in dacite (lava of intermediate composition) from Dahkobed/Glacier Peak volcano in the north Cascade Arc. The samples consist of a felsic (high SiO2) host component and a mafic (low SiO2) inclusion component. To establish base mineral populations, minerals from both the host and …