Abstract The Greater Caucasus mountains (Cavcasioni) mark the northern margin of Arabia–Eurasia collision zone. Magmatism in central part began Pleistocene, up to ~25 Myr after initial collision. This paper presents bulk-rock and Sr–Nd–Pb isotope geochemistry from 39 Quaternary volcanic rock samples (<450 Ka) recovered Mt. Kazbek (Kasbegui) region Caucasus, Georgia, assess sources magmat...

In the Central Andes, large (> 500 km2) and long-lived (1–5 Ma) volcanic clusters (LVCs) are less explored their eruptive history magmatic regimes understood than smaller, short-lived (<0.5 Ma), individual stratocones. The Chachani-large cluster (C-LVC) sizeable volume (c. 290 km3) consists of twelve edifices forming 1.06–0.64 Ma group stratovolcanoes 0.46–0.05 domes coulees block-lava flow fie...

Abstract Great quantities of stone by-products are stored alongside different exploiting mines in south Brazil, which becoming an unsustainable environmental issue. Powder materials andesite and dacite rocks were obtained from two mining companies Southern Brazil. The particle size classification the was determined by sieving. X-ray diffraction (XRD) technique used to identify mineral phases fl...

The post-collisional Syunik and Vardenis volcanic highlands, located in the southern Lesser Caucasus mountains (part of Arabia-Eurasia collision zone) are host to over 200 monogenetic volcanoes, as well 2 large Quaternary polygenetic volcanoes highland. latter overlain by lavas from suggesting there was a transition style activity large-volume central vent eruptions dispersed small-volume erupt...

The Baghuo gold mine (Kuhzar) is located about 100 km S-SE of Damghan. The area is part of Torud- Chahshirin volcano- plutonic belt. The hosts of quartz – tourmaline veins are mainly granite, granodiorite and volcanic rocks such as andesite and dacite.  Mineralization occurs as a copper- gold bearing silica vein. Quartz, pyrite, chalcopyrite, gold, hematite, malachite, azurite, covellite and Fe...

The Eocene-Oligocene Sarbisheh volcanic complex is a part of the Lut-Sistan Zone that outcrops in eastern Iran. In the east of this complex, three groups of volcanic rocks (i.e., andesite, dacite, and rhyolite) exist. Plagioclase as the main mineral of these rocks is found with varying micro-textures. Based on a changing trend in the concentration of anorthite, the developed micro-textures (coa...