Petrographic, geochemical and determination of magmatic series and tectonic environment (case study: NiazGholi-Moshiran, Meshginshahr, Ardabil, Iran)

NiazGholi-Moshiran exploration area is located in the ۱: ۱۰۰,۰۰۰ Lahroud sheet in the northwest of Ardabil province and in the West Alborz-Azerbaijan tectonic zone. Geologically, most of the area is covered with Paleocene-Eocene rocks, which are composed of volcanic sections with andesite, tephrite and trachyandesite fragments, which are observed along with andesitic-tephritic pillow lava. Results from rare earth elements show LREE enrichment relative to HREE, subduction tectonic position based on Zr versus Y bivariate diagram, magma fertility and plagioclase subtraction according to Sr / Y ratio and geochemical data, satellite data, magmatic tectonics and the composition of this Shushonite rocks in this zone can be attributed to the subduction of the oceanic crust of Neotethys during the Mesozoic or early Cenozoic and the release of fluids from the subducted crust, which is followed by magmatic activity due to metasomatism of the mantle and in appropriate conditions by melting of this metasomatized mantle.

کلیدواژه ها:

Petrography ، Geochemistry ، Magmatic series ، Tectonic environment ، NiazGholi-Moshiran