#Eclogite

Have you ever wondered why there are no #Archean UHP eclogites older than c. 0.8 Ga if #plate #tectonics has operated since c. 3 Ga, and isolated #subduction complexes formed
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What's the current thinking regarding the importance of metastability for subduction zone processes?I'm pretty convinced blueschist-to-eclogite metastability is rare at large scale, unsure about antigorite metastability, and totally unsure fo
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