Consequences of a crystal mush-dominated magma plumbing system: a mid-ocean ridge perspective.

ABSTRACT: Crystal mush is rapidly emerging as a new paradigm for the evolution of igneous systems. Mid-ocean ridges provide a unique opportunity to study mush processes: geophysical data indicate that, even at the most magmatically robust fast-spreading ridges, the magma plumbing system typically comprises crystal mush. In this paper, we describe some of the consequences of crystal mush for the evolution of the mid-ocean ridge magmatic system. One of these is that melt migration by porous flow plays an important role, in addition to rapid, channelized flow. Facilitated by both buoyancy and (deformation-enhanced) compaction, porous flow leads to reactions between the mush and migrating melts. Reactions between melt and the surrounding crystal framework are also likely to occur upon emplacement of pri

SUBMITTER: Lissenberg CJ 

PROVIDER: S-EPMC6335481 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature