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Geological Society, London, Special Publications; 1990; v. 49; p. 39-47;
DOI: 10.1144/GSL.SP.1992.049.01.04
© 1990 Geological Society of London

Evolution of the Oman Tethyan Continental Margin

A review of platform sedimentation in the Early and Late Permian of Oman, with particular reference to the Oman Mountains

C. W. Lee

Department of Science, Polytechnic of Wales, Treforest, S. Wales, UK

The Permian of Oman consists of two distinct portions. An early Permian sequence of clastics and carbonates, that are conformable with the Carboniferous, and a late Permian sequence of carbonates that may rest with strong unconformity on the underlying sequence. Lower Permian clastic rocks crop out in S and E Central Oman and they also occur extensively in the subcrop of South and Central Oman. They show a glacial affinity and are correlated with the Dwyka glaciogenic deposits of Gondwanaland. Lower Permian marine carbonates are also found in the Haushi region of E Central Oman and from the Batain coast where they are known as the Lusaba Limestone and Qarari Limestone, respectively. The Upper Permian carbonates are found extensively throughout the Oman Mountains where they constitute the Bih, Hagil and Saiq Formations, the Khuff Formation in the subcrop and as blocks in the Batain Melange of NE Oman. Permian carbonates are also found as ‘exotics’ masses in the higher thrust slices (Haybi Complex) beneath the Semail Ophiolite. These carbonates were deposited on block faulted crust by a major transgression (enhanced by a post-glacial rise in sea level) caused by the onset of continental rifting. The rocks which characterize the autochthonous (parautochthonous) portion of Oman show affinities with Gondwanaland or the southern side of Tethys, while the faunas collected from the Batain coast area of NE Oman have affinities with Timor and possibly the northern side of Tethys in Early Permian times.





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[Abstract] [PDF]