Conference
Strain partitioning during oblique convergence: the Aghdarband case-study, NE Iran
| العنوان: | Strain partitioning during oblique convergence: the Aghdarband case-study, NE Iran |
|---|---|
| المؤلفون: | ZANCHI, ANDREA MARCO, ZANCHETTA, STEFANO, Diaz Azpiroz, M, Fernandez, C, Balini, M, Reza Ghassemi, M. |
| المساهمون: | Calcaterra, D, Mazzoli, S, Petti, FM, Carmina, B, Zuccari, A, Zanchi, A, Zanchetta, S, Diaz Azpiroz, M, Fernandez, C, Balini, M, Reza Ghassemi, M |
| بيانات النشر: | Società Geologica Italiana IT Roma |
| سنة النشر: | 2016 |
| المجموعة: | Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
| مصطلحات موضوعية: | NE Iran, Kopeh Dagh, transpression, oblique convergence, Triassic, Cimmerian orogeny, structural, GEO/03 - GEOLOGIA STRUTTURALE |
| الوصف: | The Aghdarband Basin, consisting of a strongly deformed arc-related Triassic marine succession, is a key-area for the study of the Cimmerian events, as the Cimmerian deformational structures are sealed by the Middle Jurassic to Cenozoic poorly deformed units of Kopeh Dagh, NE Iran. Aghdarband is located to the north of the Palaeotethys suture zone, which records a Devonian to early Mesozoic convergence. The integrated stratigraphic and structural analyses of the Triassic successions of Aghdarband give new insights on the Cimmerian collision. Based on detailed fieldwork, we refined the previous stratigraphic framework and we performed meso- to megascopic structural analyses of the upper Palaeozoic to Triassic units of the area. Our data suggest that the Triassic sedimentation occurred in an extensional/transtensional basin characterized by important synsedimentary faulting activity. During the latest stages of the Cimmerian deformation, the Triassic successions, including the Upper Triassic Miankuhi Fm. were severely deformed into a N- to NNE-verging imbricate thrust fan, interacting with an ESE-WSW left-lateral wrench fault zone, the Northern Fault, producing positive flower structures with high angle reverse faults. The thrust stack, occurring to the south, extends for some tens of kilometres, involving Upper Permian conglomerates. It can be interpreted as a compressional retro-wedge formed in an arc/back-arc position with an opposite vergence with respect to the main collisional zone deriving from N-directed subduction of the Palaeotethys. One of the most peculiar characters of the area, given by the occurrence of megascopic plunging to vertical folds, is closely associated with the transpressional regime due to the activity of the left-lateral shear zone occurring in the northern part of the area. Curvilinear vertical fold axes result from hinges rotation during progressive deformation and to dragging occurring along the main strike-slip faults. Preliminary results from kinematic modelling of passive hinge ... |
| نوع الوثيقة: | conference object |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| Relation: | ispartofbook:Geosciences on a changing planet: learning from the past, exploring the future 88° Congresso della Società Geologica Italiana Napoli 7-9 Settembre 2016; Congresso della Società Geologica Italiana; volume:40; issue:Suppl. n. 1; firstpage:207; lastpage:207; numberofpages:1; alleditors:Calcaterra, D; Mazzoli, S; Petti, FM; Carmina, B; Zuccari, A; http://hdl.handle.net/10281/131457; http://rendiconti.socgeol.it/ |
| الاتاحة: | http://hdl.handle.net/10281/131457 http://rendiconti.socgeol.it/ |
| Rights: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.988095D5 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |