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Tectono-stratigraphic evolution of the intermontane Tarom Basin (NW sectors of the Arabia-Eurasia collision zone): insights into the vertical growth of the Iranian Plateau margin

Paknia, M. and Ballato, P. and Mattei, M. and Heidarzadeh, G. and Cifelli, F. and Hassanzadeh, J. and Vezzoli, G. and Mirzaie Ataabadi, M. and Ghassemi, M. R. (2020) Tectono-stratigraphic evolution of the intermontane Tarom Basin (NW sectors of the Arabia-Eurasia collision zone): insights into the vertical growth of the Iranian Plateau margin. . (Unpublished)

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The intermontane Tarom Basin of NW Iran (Arabia-Eurasia collision zone) is located at the transition between the Iranian Plateau (IP) to the SW and the Alborz Mountains to the NE. This basin was filled by Late Cenozoic synorogenic red beds that retain first-order information on the erosional history of adjacent topography, the vertical growth of the plateau margin and its lateral (orogen perpendicular) expansion. Here, we perform a multidisciplinary study including magnetostratigraphy, sedimentology, geochronology and sandstone petrography on these red beds. Our data show that widespread Eocene arc volcanism in NW Iran terminated at ~ 38-36 Ma, while intrabasinal synorogenic sedimentation occurred between ~ 16.5 and < 7.6 Ma, implying that the red beds are stratigraphically equivalent to the Upper Red Formation. After 7.6 Ma, the basin experienced intrabasinal deformation, uplift and erosion in association with the establishment of external drainage. Fluvial connectivity with the Caspian Sea, however, was interrupted by at least four episodes of basin aggradation. During endorheic conditions the basin fill did not reach the elevation of the plateau interior and hence the Tarom Basin was never integrated into the plateau realm. Furthermore, our provenance data indicate that the northern margin of the basin experienced a greater magnitude of deformation and exhumation than the southern one (IP margin). This agrees with recent Moho depth estimates, suggesting that crustal shortening and thickening cannot be responsible for the vertical growth of the northern margin of the IP, and hence surface uplift must have been driven by deep-seated processes.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Paknia, M.0000-0001-8519-4403
Ballato, P.0000-0002-3836-8199
Hassanzadeh, J.0000-0003-3477-2546
Vezzoli, G.0000-0003-2907-0283
Mirzaie Ataabadi, M.0000-0001-8414-8229
Additional Information:License: Attribution 4.0 International. Published Online: Wed, 29 Apr 2020. This study is part of the PhD thesis of MP at the University of Roma Tre (PhD program Cycle XXXII) and was supported by the PhD School of Roma Tre, the MIUR (Ministry of Education University and Research; Grant Rita Levi Montalcini to PB), the DFG (German Science Foundation; grants DFG BA 4420/2-1 and BA 4420/2-2 to PB) and the DAAD (German Academy Research Service, grant to GH). The authors declare no financial or other conflicts of interest. Software and analyzed data of paleomgantic samples used to produce the results in this work are available at The authors would like to thank Masoud Biralvand and Mahmood Fallah for helping with the logistic during the field work.
Funding AgencyGrant Number
Roma Tre UniversityUNSPECIFIED
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)BA 4420/2-1
Deutsche Forschungsgemeinschaft (DFG)BA 4420/2-2
Deutscher Akademischer Austauschdienst (DAAD)UNSPECIFIED
Subject Keywords:Iranian Plateau, plateau margin uplift, deep seated processes, magnetostratigraphy, depositional settings, intermontane sedimentation
Record Number:CaltechAUTHORS:20201027-131114260
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106302
Deposited By: Tony Diaz
Deposited On:27 Oct 2020 20:59
Last Modified:16 Nov 2021 18:52

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