1- Department of Mineral Resource and Groundwater, Faculty of Earth Sciences
2- Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences
2- Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences
Abstract: (335 Views)
The Dalampar ophiolitic- metamorphic complex is is an unknown part of the Neo-Tethys ophiolite and is located NW of Iran in the south of Urmia city within the Sanandaj-Sirjan metamorphic belt. This complex consists of a variety of schist, gneiss, amphibolite rocks with serpentinite and tectonic slices including gabbro, dunite, marble and diabase. Tectonically, the Dalampar ophiolite is severely mingled and the boundary of different units in this complex is indistinguishable. The amphibolites show a discontinuous outcrops as pods and lenses. Sometimes have lineation and foliation. Amphibole and plagioclase are main mineral constituents in the rocks. Study of whole rock chemistry of the amphibolites indicates that they are originated from an a igneous protolith with basaltic (or gabbroic) and tholoitic to calk-alkaline nature. Chondrite normalized-REE diagram show LREE enrichment relative to HREE. Primitive mantle- normalized trace elements diagram show depletion of HFSE and HREE. According to the discrimination diagrams of tectonomagmatic setting, the protolith of investigated metabasites has been islands arc and somewhat mid ocean ridge.
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