Crustal melting and suprasolidus phase equilibria: From first principles to the state-of-the-art

T Johnson, C Yakymchuk, M Brown - Earth-Science Reviews, 2021 - Elsevier
Partial melting is the fundamental process by which juvenile crust was produced from the
mantle and subsequently reworked to become the stable, compositionally-differentiated …

Ferrous/ferric (Fe2+/Fe3+) partitioning among silicates in metapelites

JB Forshaw, DRM Pattison - Contributions to Mineralogy and Petrology, 2021 - Springer
Abstract Fe3+ and XFe3+, defined as Fe3+/(Fe2++ Fe3+) on a molar basis, are now
recognised as key parameters in phase equilibrium modelling. A hindrance is that it is only …

Self‐induced incipient 'eclogitization'of metagranitoids at closed‐system conditions

S Schorn - Journal of Metamorphic Geology, 2022 - Wiley Online Library
The incipient development of diagnostic high‐pressure assemblages—the 'eclogitization'—
of granitoids, such as plagioclase breakdown and small‐scale formation of garnet and …

Evidence of an Archean-Paleoproterozoic micro-continent remobilized during the Neoproterozoic from the western Hoggar (Tuareg Shield, Algeria): Geodynamic …

A Bendaoud, R Caby, S Djemaï, O Bruguier, DE Aissa… - Geochemistry, 2024 - Elsevier
The western boundary of the Tirek terrane in the Hoggar contains the two largest gold
deposits in Algeria, namely the Amesmessa and Tirek gold fields. New geological map** …

Petrological study of an eclogite-facies metagranite from the Champtoceaux Complex (La Picherais, Armorican Massif, France)

T Gyomlai, P Yamato, G Godard - European Journal of …, 2023 - ejm.copernicus.org
The high-pressure metagranite of La Picherais belongs to the Cellier Unit (part of the lower
allochthon of the Champtoceaux Complex; Armorican Massif, western France), where it …

Neoproterozoic evolution and Cambrian reworking of ultrahigh temperature granulites in the Eastern Ghats Province, India

RJ Mitchell, TE Johnson, C Clark… - Journal of …, 2019 - Wiley Online Library
The time‐scales and P–T conditions recorded by granulite facies metamorphic rocks permit
inferences about the geodynamic regime in which they formed. Two compositionally …

Ultrahigh‐temperature Palaeoproterozoic rocks in the Neoproterozoic Borborema Province, implications for São Francisco Craton dispersion in NE Brazil

LR Tesser, CE Ganade, RF Weinberg… - Journal of …, 2022 - Wiley Online Library
This work reports on the first identification of sapphirine‐bearing ultrahigh‐temperature
(UHT) metamorphic rocks within the Borborema Province, in NE Brazil. The investigated …

The truth and beauty of chemical potentials

R Powell, KA Evans, ECR Green… - Journal of Metamorphic …, 2019 - Wiley Online Library
This essay in honour of Mike Brown addresses aspects of chemical equilibrium and
equilibration in rocks, with a focus on the role that chemical potentials play. Chemical …

The contribution of charnockite magmatism to achieve near-ultrahigh temperatures in the Namaqua–Natal Metamorphic Province, South Africa

S Schorn, JFA Diener, D Sorger, C Clark - Lithos, 2020 - Elsevier
Aluminous metapelitic granulites from the central Namaqua Sector of the Namaqua–Natal
Metamorphic Province, South Africa, host partly retrogressed hercynite–quartz …

Early Jurassic accretion of retrograde eclogites and granulites in the Amdo complex, Bangong–Nujiang suture zone, central Tibet

Z Tian, Z Zhang, PM Piccoli, X Dong - Gondwana Research, 2022 - Elsevier
The timing of ocean closure and thermal evolution of the crust in the Bangong–Nujiang
suture zone (BNSZ) in central Tibet, which separates the Qiangtang terrane to the north and …