Abstract
Detailed isotopic and trace element analyses of a garnet clinopyroxenite layer from the Ronda ultramafic complex demonstrate the difficulty in obtaining primary mantle information from orogenic lherzolites. However, isotope systematics suggest that mafic layers at Ronda were formed 22±2 Myr ago from a reservoir with initial Nd and Sr isotope ratios of 0.51317 and 0.7025, respectively, and represent the products of interaction between normal mid-oceanic ridge tholeiite and depleted mantle peridotite.
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Zindler, A., Staudigel, H., Hart, S. et al. Nd and Sr isotopic study of a mafic layer from Ronda ultramafic complex. Nature 304, 226–230 (1983). https://doi.org/10.1038/304226a0
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DOI: https://doi.org/10.1038/304226a0
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