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Continuous eclogite melting and variable refertilisation in upwelling heterogeneous mantle
Citation
Rosenthal, A and Yaxley, GM and Green, DH and Hermann, J and Kovacs, I and Spandler, C, Continuous eclogite melting and variable refertilisation in upwelling heterogeneous mantle, Scientific Reports, 4 Article 6099. ISSN 2045-2322 (2014) [Refereed Article]
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Copyright Statement
Copyright 2014 The Authors Licensed under a Creative Commons Attribution-NonCommercial- NoDerivatives 4.0 International(CC BY-NC-ND 4.0) http://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract
Large-scale tectonic processes introduce a range of crustal lithologies into the Earth’s mantle. These
lithologies have been implicated as sources of compositional heterogeneity in mantle-derived magmas. The
model being explored here assumes the presence of widely dispersed fragments of residual eclogite (derived
from recycled oceanic crust), stretched and stirred by convection in the mantle. Here we show with an
experimental study that these residual eclogites continuously melt during upwelling of such heterogeneous
mantle and we characterize the melting reactions and compositional changes in the residue minerals. The
chemical exchange between these partial melts and more refractory peridotite leads to a variably
metasomatised mantle. Re-melting of these metasomatised peridotite lithologies at given pressures and
temperatures results in diverse melt compositions, which may contribute to the observed heterogeneity of
oceanic basalt suites. We also show that heterogeneous upwelling mantle is subject to diverse local freezing,
hybridization and carbonate-carbon-silicate redox reactions along a mantle adiabat.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Earth Sciences |
| Research Group: | Geology |
| Research Field: | Igneous and Metamorphic Petrology |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding Knowledge |
| Objective Field: | Expanding Knowledge in the Earth Sciences |
| UTAS Author: | Green, DH (Professor David Green) |
| ID Code: | 98576 |
| Year Published: | 2014 |
| Web of Science® Times Cited: | 27 |
| Deposited By: | Earth Sciences |
| Deposited On: | 2015-02-19 |
| Last Modified: | 2017-10-30 |
| Downloads: | 386 View Download Statistics |
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