Our understanding on the formation, mechanism and timing of the formation of the Earth’s earliest continents hinges on obtaining robust and accurate ages of melt depletion and lithosphere stabilisation.
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The attainment of an Eoarchean age from a metasomatic BMS suggests that the metasomatic fluid is able to entrain or nucleate on residual BMS.
As such, the obtained ages reflect a mixing between the two different Os signatures.
This provides further evidence for the metasomatic overprinting of the Kaapvaal peridotites.
Despite the high degree of metasomatism experienced by the Letlhakane peridotites (Zimbabwe craton), as evidenced by their re-enriched HSE-Se-Te systematics, single grain BMS preserve evidence of partial melting events.