Figure 2
From: Marine Carbonates in the Mantle Source of Oceanic Basalts: Pb Isotopic Constraints
206Pb/204Pb versus 87Sr/86Sr for Archaean limestones. Symbols as in Fig. 1. Shown for reference are the carbonate fractions of the few Mushandike limestones that have 87Sr/86Sr data (gray arrows point to the approximate location of other samples), the field for oceanic basalts and locations of proposed mantle end-components.
