Multiphase Structural Evolution of a Continental Margin During Obduction Orogeny: Insights From the Jebel Akhdar Dome, Oman Mountains

Tectonics ◽  
2018 ◽  
Vol 37 (3) ◽  
pp. 888-913 ◽  
Author(s):  
A. Grobe ◽  
S. Virgo ◽  
C. von Hagke ◽  
J. L. Urai ◽  
R. Littke
Keyword(s):  
Continental Margin ◽  
Structural Evolution ◽  
Oman Mountains

Structure of the Hawasina Window culmination, central Oman Mountains

1986 ◽  
Vol 77 (2) ◽  
pp. 143-156 ◽  
Author(s):  
M. P. Searle ◽  
D. J. W. Cooper
Keyword(s):  
Structural Analysis ◽  
Continental Margin ◽  
Cross Sections ◽  
Structural Evolution ◽  
Complex Model ◽  
Shelf Edge ◽  
Oman Mountains ◽  
Stacking Order ◽  
Structural History ◽  
Semail Ophiolite

ABSTRACTDetailed mapping, stratigraphic logging and structural analysis of the Hawasina Window culmination in the central Oman Mountains of Arabia reveals an extremely complex thrust geometry and structural history. The initial thrust sequence involved a southwestward propagating stacking during telescoping of the Arabian continental margin slope (Sumeini complex), and time-equivalent, more distal Tethyan basin (Hawasina and Haybi complexes) facies rocks. The Semail thrust, carrying the 12 km-thick ophiolite sequence, progressively overlaps Haybi and Hawasina duplexes towards the SW. Late stage “leap-frog” thrusts have punched Sumeini duplexes higher up into the earlier thrust stack locally reversing the normal stacking order. SW-directed thrusts and SW-facing folds in the SW and NE-directed backthrusts and NE-facing backfolds in the NE have created a fan structure cored by the Jebel Rais “pop-up” composed of Sumeini slope facies rocks.The palaeogeographic presence of a large NE-facing promontory in the Cretaceous shelf edge is inferred beneath the Window. The frontal ramp of this promontory was sufficiently large to inhibit the overthrusting of large volumes of Hawasina and Haybi complex rocks. The whole central part of the Window shows NE-facing and verging backfolds and backthrusts affecting all duplexes from the lowest Sumeini up to the Semail ophiolite. The promontory is bounded by major lateral ramps to the NW (Wadi Shafan area) and SE (Jebel Milh area). A map and four balanced cross-sections are presented here to promote a complex model for the structural evolution of the Hawasina Window.

scholarly journals Supporting Information Grobe et al. 2018 Tectonics - Multiphase structural evolution of a continental margin during obduction orogeny Insights from the Jebel Akhdar Dome, Oman Mountains

2018 ◽  
Author(s):  
Arne Grobe
Keyword(s):  
Continental Margin ◽  
Structural Evolution ◽  
Oman Mountains

Supporting Information Grobe et al. 2018 Tectonics - Multiphase structural evolution of a continental margin during obduction orogeny Insights from the Jebel Akhdar Dome

The Hawasina Nappes: stratigraphy, palaeogeography and structural evolution of a fragment of the south-Tethyan passive continental margin

1990 ◽  
Vol 49 (1) ◽  
pp. 213-223 ◽  
Author(s):  
F. Bechennec ◽  
J. Le Metour ◽  
D. Rabu ◽  
Ch. Bourdillon-de-Grissac ◽  
P. de Wever ◽  
...  
Keyword(s):  
Continental Margin ◽  
Structural Evolution ◽  
Passive Continental Margin ◽  
The South

Evolution of the Arabian continental margin in the Dibba Zone, Northern Oman Mountains

1990 ◽  
Vol 49 (1) ◽  
pp. 251-284 ◽  
Author(s):  
A. H. F. Robertson ◽  
C. D. Blome ◽  
D. W. J. Cooper ◽  
A. E. S. Kemp ◽  
P. Searle
Keyword(s):  
Continental Margin ◽  
Oman Mountains

Mid-crustal deformation in a continental margin orogen: structural evolution and timing of the Famatinian Orogeny, NW Argentina

2019 ◽  
Vol 177 (2) ◽  
pp. 233-257 ◽  
Author(s):  
Mariano A. Larrovere ◽  
Camilo R. de los Hoyos ◽  
Arne P. Willner ◽  
Sebastián O. Verdecchia ◽  
Edgardo G. Baldo ◽  
...  
Keyword(s):  
Continental Margin ◽  
Crustal Deformation ◽  
Structural Evolution
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