Melt Reintegration Modelling: Testing against a Subsolidus Reference Assemblage
AbstractPhase equilibria modelling incorporating melt reintegration offers a methodology to create hypothetical rock compositions that may have existed prior to melt loss, allowing the potential prograde evolution of rocks to be explored. However, melt reintegration modelling relies on assumptions concerning the volume of melt that was lost and is generally restricted by the absence of direct constraints on the pre-anatectic mineral assemblages. Mg-rich granulite in the 514–490 Ma Delamerian Orogen in southern Australia contains spinel–cordierite symplectic intergrowths that surround rare, coarse blocky domains of sillimanite. These sillimanite cores, as well as the widespread presence of andalusite in lower grade areas of the southern Delamerian Orogen, suggest that the subsolidus precursor to the granulite contained andalusite. This provides the opportunity to test if melt reintegration modelling of the granulite predicts subsolidus andalusite. Stepwise down-temperature melt reintegration modelling produces a water-saturated solidus after the addition of 12 mol% melt. When modelled at subsolidus conditions, the resulting rock composition produces andalusite-bearing assemblages with andalusite modes similar to the abundance of the sillimanite-cored spinel–cordierite intergrowths. The modelling results from this case study suggest that melt reintegration modelling is a valid method to recreate prograde subsolidus bulk rock compositions. View Full-Text
- Supplementary File 1:
Supplementary (ZIP, 17 KB)
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Alessio, K.L.; Hand, M.; Morrissey, L.J.; Kelsey, D.E.; Payne, J.L. Melt Reintegration Modelling: Testing against a Subsolidus Reference Assemblage. Geosciences 2017, 7, 75.
Alessio KL, Hand M, Morrissey LJ, Kelsey DE, Payne JL. Melt Reintegration Modelling: Testing against a Subsolidus Reference Assemblage. Geosciences. 2017; 7(3):75.Chicago/Turabian Style
Alessio, Kiara L.; Hand, Martin; Morrissey, Laura J.; Kelsey, David E.; Payne, Justin L. 2017. "Melt Reintegration Modelling: Testing against a Subsolidus Reference Assemblage." Geosciences 7, no. 3: 75.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.