In:
Tectonics, American Geophysical Union (AGU), Vol. 41, No. 12 ( 2022-12)
Abstract:
Northeast Arabia is famous for Late Cretaceous (∼95–75 Ma) top‐SSW obduction of the Semail Ophiolite. NNE/SSW‐shortening caused the main uplift of the Oman Mountains during the Eocene/Oligocene (∼40–30 Ma). We report on an important phase of E/W‐shortening in the Oman Mountains at ∼32.5–20 Ma. Our work is based on field survey, literature review, map interpretation, GPlates reconstruction and U‐Pb dating of carbonate. We argue that E/W‐shortening of 100 km was related to far‐field effects of the counter‐clockwise rotation of India with respect to Arabia. In response to this shortening, a NW‐striking sinistral wrench corridor with widely distributed strain formed (i.e., N/S contractional structures, E/W extensional structures, WNW‐striking sinistral Riedel faults, and SW‐striking dextral anti‐Riedel faults). We name this corridor is the “Hajar Wrench Corridor,” encompassing an area of 250 km by 50 km. Concentrated deformation within this corridor at the southwestern margin of the Saih Hatat Dome and beyond formed the Hajar Shear Zone (HSZ). Presumably NW‐striking deeply rooted pre‐existing faults facilitate shearing along the HSZ. E/W‐shortening also affected the northern Oman Mountains and is responsible for deformation at the Hagab Thrust in Musandam and the Jabal Hafit Anticline at the Oman/UAE border.
Type of Medium:
Online Resource
ISSN:
0278-7407
,
1944-9194
DOI:
10.1029/2022TC007271
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
2022
detail.hit.zdb_id:
2013221-9
detail.hit.zdb_id:
780264-X
SSG:
16,13
SSG:
13
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