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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wrobel Daveau, Jean Christophe Ringenbach, Jean Claude Tavakoli, Saeid Ruiz, Geoffrey M. H. Masse, Pierre Frizon de Lamotte, Dominique |
| Copyright Year | 2010 |
| Abstract | The Kermanshah Crush Zone (Zagros, Iran) comprises elements from the Tethys Ocean and the former ocean–continent transition. Serpentinites and gabbros exposed in this area were formerly interpreted as originated from Tethys ocean and other residual Tethys oceanic domains all situated northeast of the Bisotoun platform. However, the structural relationships between these ultramafic units remained unclear. New field work in the Kermanshah–Harsin area led to the description of detachment faults over serpentinised mantle. “Mid-Cretaceous” carbonate “extensional allochthons” (pre-rift) and pelagic sediments (syn- to post-rift) dated from the Liassic are exposed above these detachments. Such an age mismatch can be explained by a polyphased mantle exhumation in a narrow basin along the Arabian margin with the assumption that no radiolarite nappe has been thrusted over the Bisotoun. Another detachment has been identified further to the NE on Eocene gabbro. So far, this one is considered as an intra-oceanic detachment from the residual Tethys. A first evolution model is proposed from early Jurassic to late Cretaceous obduction along with how this interpretation may be improved by future field work.تحتوي منطقة كزمنشاه بسلسلة الزاقروس بإيران على عناصر قديمة موروثة من محيط “التاتيس” ومنطقة التعدي بين القارة و المحيط. كانت تفسَّرأحجار السربانتينيت و القابرو الموجودة في المنطقة على أساس أنها راجعة الى عناصر من التاتيس وأخرى من بقايا أحواض في التاتيس، كلها في شمال شرق منطقة بيزوتوم. إلا أن العلاقات البنيوية بين هاته العناصر كانت غير مفهومة.ملاحظات و تحاليل ميدانية جديدة في منطقة كرمنشاه و حرسين مكّنت من الكشف على وجود تصدعات انزلاقية على السربانتيت المنتمية للغلاف الخارجي للأرض. احتملت هذه التصدعات رواسب كلسية من الزمن الطباشيري الأوسط و رواسب محيطية عميقة من زمن اللياس. ويعزي وجود هذه الأعمار في الرواسب إلى تعرية انزلاقية متعددة الترددات في الزمن في حوض قريب من الصفيحة العربية.من جهة أخرى تمّ التعرف أيضا على تصدع انزلاقي في شمال شرق المنطقة فوق قبروالإيوسين. والذي يمكن اعتبارة انزلاقا محيطيا في التاتيس المتبقّية القديمة.ولقد تمكنّا في هذا العمل من استنتاج مثال جيوديناميكي من زمن الجوراسيك إلى أواخر الزمن الطباشيري نناقشه في هذا العمل. |
| Starting Page | 499 |
| Ending Page | 513 |
| Page Count | 15 |
| File Format | |
| ISSN | 18667511 |
| Journal | Arabian Journal of Geosciences |
| Volume Number | 3 |
| Issue Number | 4 |
| e-ISSN | 18667538 |
| Language | Arabic |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-10-19 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Zagros (Iran) Tethys Detachment Mantle exhumation Late cretaceous Earth Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences Environmental Science |
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