Mafic glass compositions: a record of magma storage conditions, mixing and ascent.

ABSTRACT: The trans-crustal magma system paradigm is forcing us to re-think processes responsible for magma evolution and eruption. A key concept in petrology is the liquid line of descent (LLD), which relates a series of liquids derived from a single parent, and therefore tracks the inverse of the crystallization path. It is common practice to attribute multiple magma compositions, and/or multiple melt compositions (from melt inclusions and matrix glass), to a single LLD. However, growing evidence for rapid, and often syn-eruptive, assembly of multiple magma components (crystals and melts) from different parts of a magmatic system suggests that erupted magma and melt compositions will not necessarily represent a single LLD, but instead may reflect the multiple paths in pressure-temperature space. H

SUBMITTER: Cashman KV 

PROVIDER: S-EPMC6335480 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature