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Long-term preservation of Hadean protocrust in Earth’s mantle

Due to active plate tectonics, there are no direct rock archives covering the first ca. 500 million y of Earth’s history. Therefore, insights into Hadean geodynamics rely on indirect observations from geochemistry. We present a high-precision 182W dataset for rocks from the Kaapvaal Craton, southern Africa, revealing the presence of Hadean protocrustal remnants in the Earth’s mantle. See full publication here . Summary in German  here .

Apr 29, 2022 | Geochemistry