Transgressive sequence of basal Permian System: An evidence to the Hercynian vertical movements in different studied sections of Iran

During the Late Paleozoic, as a result of the north Gondwana continental collision of the Europe, Hercynian Mountains have created (Berberian & King, 1981; Haq & Al-Qahtani, 2005). Most geologists and researchers e.g.: Stöcklin (1974), Nabavi (1976), Berberian (1976) and Stampfli (1978), believed Hercynian phase has influenced the Iranian platform on the type of epeirogenesis, but new studies has proved evidence of Hercynian orogenic movements in Iran. Furon (1941), Gansser (1955), and Gansser et al. (1965) for the first time studied the geology of the Shotori range in the frame of the general geology, sedimentology and the mapping geology.
Stöcklin et al. (1965) assigned the Ozbak -Koh Group deposits to the Late Paleozoic (Devonian and Carboniferous) in the Central Iran which includes the Bahram, Shishtu and Sardar formations to the pre-Permian and the Jamal Formation with Permian age. This study conducts the effects of the Hercynian movements and the related evidences in the north, west and central Iran on the base of sedimentology and geochemistry of the basal Permian siliceous sandstone and the fossils (fauna and flora).
Yazdi et al (1989) compared the “top quartzite of the Sardar Formation” with many other sections of Iran to identify the sources of sands with detailed geochemical study and its economic uses of this horizon which has been named ''transgressive basal Permian sandstone'' (Yazdi, 1999).
Yazdi et al. (2004), Parvaneh et al. (2004), Rabiey & Yazdi (2001), Yazdi & Archbold (2002) and Yazdi (2001) also studied the Paleo-events in Upper Carboniferous - Early Permian with emphasizing on the plants fossils at the topmost Carboniferous which were the markers to the epirogenetic movements and the sea level fall at the Carboniferous – Permian boundary. Several siliceous sandstone samples were collected from eight sections for this research include: Stabragh Sirjan destructive sand granitic, silica sand base of the Permian Zagros in sections Gahkom, Faraghon, Surmeh, Zardkuh and Dashtak (Zard kuh-e-Zagros), Chiruk-e- Tabas and DJam Semnan. Samples studied using semi industrial and industrial analysis for percentage, weight, volume, granulometry and melting point, based on the obtained results this siliceous sandstone has the same source and paleoenvironment condition. According to plant fossil remains, conglomerate unit, crinoidal beds and the siliceous sandstone at the transition zone of the C/P boundary, also lack of Carboniferous and different thickness and age of the pre-Permian deposits in Tabas, Zagros, Isfahan and Alborz areas reveal the act of Hercinan movements in Iranian platform. Presence of Permian marine deposits show the privilege of the deeper marine condition at beginning of Permian in comparison to the Late Carboniferous time interval (Bahrami et al., 2015a; Bahrami et al., 2015b; Yazdi, 1999; Webster et al., 2011; Rabiey & Yazdi, 2011; Yazdi & Archbold, 2002; Leven & Gorgij, 2004). This research undertaken at Department of Geology, Faculty of Sciences, University of Isfahan. Financially and logistically supported by the Vice chancellor for Research and Technology office at University of Isfahan which deeply appreciated.