Did the formation of Dʺ; cause the Archaean-Proterozoic transition?
The MgO content of the highest MgO plume-related komatiites and picrites remained constant at 32 ± 2.5% between 3.5 and 2.7 Ga, then fell to 21 ± 3% by ca. 2.0 Ga, a value similar to the present day value. Because there is a linear relationship between
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|Source:||Earth and Planetary Science Letters|
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