The Kuhshah ultramafic complex is located in the south-east of Sanandaj-Sirjan metamorphic zone, near the probable remnants of Neotethys plate in Iran. It consists of highly depleted harzburgites, dunites, chromitite bands and altered gabbros. The ultramafic parts have been intruded by numerous clinopyroxenite dykes and veins. In the harzburgites, there are different generations of olivine, ort...

Abstract Back-arc spreading is a non-steady-state process exemplified by the repeated cycles of South Fiji and Lau Basins behind Tonga arc, Parece Vela Basin Mariana Trough arc. Spreading in these regions starts with rifting within volcanic arc before shifting to back-arc region where it develops into phase well-defined spreading. 2D thermo-mechanical subduction modeling incorporating transitio...

Abstract The South Banda back-arc basin is a morphotectonic environment that part of the Basin, characterized by flat morphology with depths ranging from 5000m to 6000m. purpose this paper analyze and relate morphometric aspects Quaternary seabed sediment deposits deposited in an active tectonic Sea area, including information on type its distribution as well relation volcanic hosted-massive su...

Volcanic rocks along the Panama Canal present a world-class opportunity to examine the relationship between arc magmatism, tectonic forcing, wet and dry magmas, and volcanic structures. Major and trace element geochemistry of Canal volcanic rocks indicate a significant petrologic transition at 21-25 Ma. Oligocene Bas Obispo Fm. rocks have large negative Nb-Ta anomalies, low HREE, fluid mobile e...

Abstract The “Rinkian belt” of West Greenland is a metamorphic terrain Paleoproterozoic age comprising: (1) the north Rinkian fold-thrust belt (FTB)—a pro- or fore-arc domain, highly deformed and metamorphosed with widespread anatexis; (2) Prøven Igneous Complex—a magmatic arc characterized by hypersthene granitic rocks (“charnockites”); (3) south FTB—an inverted back-arc basin; 4) continental ...