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Figure 10. U-Pb geochronology of metagabbro OM-2 from the Mérida Ophiolite. a) Concordia age plot for a consistent group of 8 zircons considered to represent the crystallization age of the protolith (LA-ICP-MS U-Pb zircon analyses). b) Weighted average of 206 Pb/ 238 U ages for the same consistent group of 8 zircons. U-Pb geochronology of metatonalite OM-1 from the Mérida Ophiolite: c) Conventional Concordia diagram showing LA-ICP-MS U-Pb zircon analyses (projection of all concordant zircons). d) Frequency and probability density age distribution. e) Concordia age plot for a consistent group of 16 zircons considered to represent the crystallization age of the protolith. f) Weighted average of 206 Pb/ 238 U ages for the consistent group of 16 zircons. INTERNATIONAL GEOLOGY REVIEW 17 Mérida Ophiolite (SW Iberia)