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The Palaeoarchean supracrustal rocks of the Barberton Greenstone Belt (BGB) consist of hydrothermally altered volcanic and silicified sedimentary rocks that form the dramatic topography in the Barberton Mountain Land of Mphumalanga Province in South Africa and Swaziland. Previous metamorphic studies are limited and used mainly empirical chlorite geothermometry in the BGB sequence regionally, or Raman thermometry, both proposing a narrow range in metamorphic conditions of around 320°C regional for the BGB. This study demonstrates that a range of petrological and thermodynamic modelling techniques are required in an integrated approach to unravel the very low- to medium-grade metamorphic conditions preserved...

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