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Showing 1 - 20 results of 39 for search '"Archean"', query time: 0.45s Refine Results
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    ...International audience Graphite, interpreted as altered bioorganic matter in an early Archean, ca...
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    ...-gneiss and schists 2200-700 Ma of the Congo Basin; Archean granitoid/gneisses and sedimentary greenstone...
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    ... for sulfur seen in early Earth samples (Archean). In recent volcanogenic sulfate, the Δ 33 S versus δ 34...
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    .... The low εNd-values indicate involvement of ancient (Archean-to-early Proterozoic) continental crust...
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