Abstract
Abstract Melt extraction in migmatites occurs via melt channels of increasing width from source areas (often recognizable by the location of incongruent phases) via concordant leucosomes to discordant melt conduits. To test the contribution of migmatites to granite genesis, melt production and melt loss need to be quantified at specimen and outcrop scale. Melt production during dehydration melting can be modelled by calculating the volume ratio of melt and incongruent phases from balanced melting reactions. Melt loss can be quantified by (i) comparing these predicted volume ratios with ratios derived in outcrop; and (ii) modelling strain patterns near melt loss structures. A field test in SW Finland shows a reasonable correspondence between melt loss estimates from leucosome/garnet volume ratios and from melt loss structures, if the original shape of the melt patch is assumed to have been linear.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
