Next Article in Journal
Evaluating the Scale and Potential of GLOF in the Bhutan Himalayas Using a Satellite-Based Integral Glacier–Glacial Lake Inventory
Previous Article in Journal
Experimental Investigation of Debris-Induced Loading in Tsunami-Like Flood Events
Open AccessArticle

Melt Reintegration Modelling: Testing against a Subsolidus Reference Assemblage

Department of Earth Sciences, University of Adelaide, Adelaide, SA 5005, Australia
School of Natural and Built Environments, University of South Australia, GPO Box 2471, Adelaide, SA 5001, Australia
Author to whom correspondence should be addressed.
Geosciences 2017, 7(3), 75;
Received: 13 July 2017 / Revised: 16 August 2017 / Accepted: 23 August 2017 / Published: 29 August 2017
Phase 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
Keywords: P–T pseudosection; low pressure metamorphism; delamerian orogen; melt reintegration; melt loss P–T pseudosection; low pressure metamorphism; delamerian orogen; melt reintegration; melt loss
Show Figures

Figure 1

MDPI and ACS Style

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.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop