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This study analyzes the geochemical compositions of Precambrian shales from the Canadian Shield, focusing on 406 Archean and 396 Aphebian samples. The findings indicate that Archean shales are primarily derived from volcanic sources, while Aphebian shales show greater maturity and are linked to granitic origins. The research highlights significant differences in elemental compositions, particularly in sulfur isotopes and trace metals, reflecting the environmental conditions during their deposition.

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1296560988

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EN