Sr, Nd and Pb Isotopic Constraints in the Genesis of a Calc-Alkaline Plutonic Suite in Oman Ophiolite Related to the Obduction Process

K-mineral bearing felsic intrusions in the Oman ophiolite have been studied for incompatible elements, and Pb, Sr, Nd isotopes. The magmatic bodies (mainly from the Khawr Fakkan massif) represent differentiated tens of meter sized intrusions or metric dikes cross-cutting the ophiolite at mantle level. Metamorphic schists and quartzites having reached anatexis, belonging to the sole of the same massif are also studied for comparison.