Geography, Geology and the Environment
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Mineral inclusions provide clues on Earth’s deep secrets
Dr Guido Meinhold co-authored a study published in Scientific Reports which presents the first findings of coesite (high-pressure polymorph of silica) inclusions in detrital mineral grains. The grains were originally derived from crystalline rocks which have once experienced ultrahigh-pressure (UHP) metamorphic conditions in Earth’s deep mantle before they were transported to the Earth’s surface. The study introduces a novel approach for tracing UHP metamorphic rocks and their erosional products at the catchment scale instead of being limited to outcrops of crystalline rocks. It opens new avenues for the prospective exploration of UHP metamorphism in Earth’s geological record.