Porosity evolution of mafic crystal mush during reactive flow.

Autor: Gleeson MLM; School of Earth and Environmental Sciences, Cardiff University, Main Building, Park Place, CF10 3AT, Cardiff, UK. gleesonm@berkeley.edu.; Department of Earth and Planetary Science, University of California Berkeley, McCone Hall, Berkeley, CA, USA. gleesonm@berkeley.edu., Lissenberg CJ; School of Earth and Environmental Sciences, Cardiff University, Main Building, Park Place, CF10 3AT, Cardiff, UK., Antoshechkina PM; Division of Geological and Planetary Sciences, Caltech, Pasadena, CA, 91125, USA.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 May 29; Vol. 14 (1), pp. 3088. Date of Electronic Publication: 2023 May 29.
DOI: 10.1038/s41467-023-38136-x
Abstrakt: The emergence of the "mush paradigm" has raised several questions for conventional models of magma storage and extraction: how are melts extracted to form eruptible liquid-rich domains? What mechanism controls melt transport in mush-rich systems? Recently, reactive flow has been proposed as a major contributing factor in the formation of high porosity, melt-rich regions. Yet, owing to the absence of accurate geochemical simulations, the influence of reactive flow on the porosity of natural mush systems remains under-constrained. Here, we use a thermodynamically constrained model of melt-mush reaction to simulate the chemical, mineralogical, and physical consequences of reactive flow in a multi-component mush system. Our results demonstrate that reactive flow within troctolitic to gabbroic mushes can drive large changes in mush porosity. For example, primitive magma recharge causes an increase in the system porosity and could trigger melt channelization or mush destabilization, aiding rapid melt transfer through low-porosity mush reservoirs.
(© 2023. The Author(s).)
Databáze: MEDLINE
Externí odkaz: