Dataset Information

Long-term preservation of Hadean protocrust in Earth's mantle.

ABSTRACT: SignificanceDue 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 Earth's mantle. This has broad implications for geochemists, geophysicists, and modelers, as it bridges contrasting ¹⁸²W isotope patterns in Archean and modern mantle-derived rocks. The data reveal the origin of seismically and isotopically anomalous domains in the deep mantle and also provide firm evidence for the operation of silicate differentiation processes during the first 60 million y of Earth's history.

SUBMITTER: Tusch J

PROVIDER: S-EPMC9170142 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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Long-term preservation of Hadean protocrust in Earth's mantle.

Tusch Jonas J Hoffmann J Elis JE Hasenstab Eric E Fischer-Gödde Mario M Marien Chris S CS Wilson Allan H AH Münker Carsten C

Proceedings of the National Academy of Sciences of the United States of America 20220422 18

SignificanceDue 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 <sup>182</sup>W dataset for rocks from the Kaapvaal Craton, southern Africa, revealing the presence of Hadean protocrustal remnants in Earth's mantle. This has broad implications for geochemists, geophysicists, and modelers, as it bridges contra ...[more]

PMID: 35452330

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Dataset Information

Long-term preservation of Hadean protocrust in Earth's mantle.

Publications

Long-term preservation of Hadean protocrust in Earth's mantle.

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