کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6444944 | 1640525 | 2013 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Paleomagnetic and inner diapiric structural constraints on the kinematic evolution of a salt-wall: The Bicorb-Quesa and northern Navarrés salt-wall segments case (Prebetic Zone, SE Iberia)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Paleomagnetism together with an analysis of the internal structure of the Bicorb-Quesa and northern Navarrés salt-wall segments (Prebetic Zone in SE Iberia) were used to constrain their kinematics and driving mechanisms. Paleomagnetic data from Upper Triassic red beds of the selected salt-related structures and from the Miocene rocks belonging to adjacent syn-diapiric half-grabens reveal 15-30° counter-clockwise vertical-axis rotations of the salt-wall rocks and a 20° clockwise rotation of the Jurassic-Miocene cover block located south of the salt-wall. This, together with the salt-wall structure, indicates that the origin of the salt-wall was linked to the motion of a late Miocene thin-skinned extensional fault system, which detached on the Upper Triassic evaporites. Specifically, the salt-wall formed by the south-southwest displacement with a 20° clockwise rotation component of a cover block bounded northwards by the detachment disruptions generated by the motion of pre-existent basement faults. The Upper Triassic detachment level was first affected by a counter-clockwise vertical axis rotation and, during the Paleogene-earliest Miocene building of the Iberian Chain, by tight WNW-trending folds and SSE-directed minor thrusts. This study also shows that Paleomagnetism together with the analysis of the internal structure can successfully depict the geometry and kinematic evolution of complex salt-wall structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Geology - Volume 52, July 2013, Pages 80-95
Journal: Journal of Structural Geology - Volume 52, July 2013, Pages 80-95
نویسندگان
E. Roca, E. Beamud, M. Rubinat, R. Soto, O. Ferrer,