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International Geology Review, vol.50, no.9, pp.810-825, 2008 (SCI-Expanded, Scopus)
Ophiolites, formed during closure of the Neo-Tethyan ocean, are widespread in Turkey and have been extensively studied. In addition to ophiolites showing recognizable stratigraphic sequences, numerous massive and layered gabbroic masses occur as isolated outcrops in the Central Anatolian Crystalline Complex. An example from the Akcakent region ranges from gabbro to diorite; another, from the Kustepe area, is characterized by dunite, wehrlite, troctolite, olivine gabbro, clinopyroxene gabbro, clinopyroxene hornblende gabbro, uralite gabbro, and fine-grained gabbro. Samples from both regions display adcumulate and orthocumulate textures and show low-K and subalkaline characters; they axe enriched in some LILE (e.g., Sr, Rb, K, Ba) and depleted in HFSE (e.g., Ta, Nb, Zr, Ti) relative to N-MORB. Petrological data, negative Ta, Nb, Zr, Ti anomalies, and ratios of elements such as Ba/Nb and La/Nb indicate a suprasubduction setting for the central Anatolian ultramaficmafic rocks, suggesting that both rock types may have formed in a backarc setting. Copyright © 2008 by Bellwether Publishing, Ltd. All rights reserved.