Abstract

Two ophiolite outcrops at Oramar and Karadađ, SE Turkey, of possible Upper Cretaceous age, occupy the same tectonic position on the northern margin of the African-Arabian continental crust as the Troodos, Kizildađ, Baer Bassit, and Oman ophiolites. Field relationships suggest that they were generated in a marginal basin. Southward subduction under the northern extension of the Arabian plate probably resulted in island are volcanism and metamorphism, as well as development of a marginal basin to the S in the Late Cretaceous. Continental convergence caused displacement of the marginal basin ophiolites as well as the northern are-trench complex southward onto the Arabian shelf towards the end of the Cretaceous and Tertiary. Another possibility is that the ophiolites are products of a leaky trans-tensional faults activated by changes in relative plate motions during the Upper Cretaceous.

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