Geological Magazine; January 2008; v. 145; no. 1;
p. 37-54; DOI: 10.1017/S0016756807003986
© Cambridge University Press (CUP)
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Figure 8. Plot La v. La/Sm showing melt curves (or lines) obtained using the parameters described in the caption of Figure 7. The straight line array represents a mixing line between melts from enriched (e.g. enriched mantle, EM) and depleted (e.g. depleted MORB mantle) components. The numbers in italic denote the mixing proportion of the depleted component in the final melt produced. The inset diagram compares the variations of highly versus moderately incompatible elements (La v. Nd) for the MORB- and OIB-type lavas from the ophiolitic suites of western Turkey with model partial melting curves (or lines) for both depleted and enriched mantle components obtained assuming the non-modal batch melting model. Continuous partial melting of any single source predicts curved trends for moderately versus highly incompatible elements. In contrast, highly and moderately incompatible trace elements from the MORB and OIB lavas from western Turkey generally exhibit individual quasi-linear trends suggesting a mixing between melts derived from sources with different compositions. Descriptions of geochemical reservoirs are as given in Figure 7.
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