Introduction and characterization of Neogene volcanic eruptions in Pariz area (Kerman province) and their petrological features using pyroclastic deposits

In the Pariz area, (Kerman province), there are deposits that have been identified in the geological maps as detrital unconsolidated Neogene Conglomerates (Ng) units. Studies on these deposits reveal that they are pyroclastic deposits from Neogene explosive eruptions. The units overlie the Eocene igneous rocks and their fragments are dacite and rhyolite .These deposits are pyroclastic surges and flow deposits in association with the laharic units. The types of pyroclastics, absence of dacitic or rhyolitic lava flows and large dispersal of these deposits, show that their eruptions were explosive and that water was involved in the eruptions. Slight variations in the amounts of major oxides such as SiO2 and MgO (64.5-68.2 and 0.43-1.1 wt%, respectively) in these rocks indicate a little crystal differentiation and the lack of compositional variations of their parent magmas. Negative Nb, Ti, and P, along with the positive Sr and Cs anomalies in the spider diagrams can indicate that these rocks are belong to calc-alkaline magmatic series. Enrichment of LREE to HREE (average LaN/LuN = 20) is characteristic of these rocks. The studied rocks belong to the post-collision environment and reflect the nature of continental magmatic arc associations.