Discussion on Palaeozoic discontinuities in the Kuh-e Surmeh area (Zagros, Iran).

Abstract : Evidence of several major unconformities in the Lower Palaeozoic succession in Iran lead to question the role of tectonic/eustatism/climate in terms of their formation. The studied Palaeozoic succession in the Kuh-e Surmeh Anticline is characterized by the preservation of two thin Ordovician and Lower Permian Formations separated by a large hiatus encompassing the Upper Ordovician up to the lowermost Permian. The Ordovician sequences were deposited in shallow shoreface to lower offshore environments and the Lower Permian corresponds to a wave-dominated estuarine system evolving to a delta system. These mainly clastic successions represent good reservoirs in the regional Palaeozoic petroleum system of the Iranian plate separated by a major unconformity. The local erosion of the Zakeen Fm., observed in the neighbouring areas close to the Kuh-e Surmeh anticline, can be used to specify the role of the different controlling factors. We show that the influence of regional tectonics (Hercynian Orogeny/extensional deformation) and climate (Hirnantian and Carboniferous glaciations) related to the late Ordovician and Late Carboniferous/Early Permian succession cannot be ruled out from the possible candidates participating in erosion, but local diapir doming seems to better explain part of this local intense erosion.
Document type :
Journal articles
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01231788
Contributor : Rémi Laffont <>
Submitted on : Friday, November 20, 2015 - 4:45:17 PM
Last modification on : Friday, June 8, 2018 - 2:50:18 PM

Identifiers

Collections

Citation

Emmanuelle Vennin, Christophe Kolodka, Afshin Asghari, Christophe Thomazo, Jean-François Buoncristiani, et al.. Discussion on Palaeozoic discontinuities in the Kuh-e Surmeh area (Zagros, Iran).. Marine and Petroleum Geology, Elsevier, 2015, 66 (4), pp.1073-1092. ⟨10.1016/j.marpetgeo.2015.05.019⟩. ⟨hal-01231788⟩

Share

Metrics

Record views

194