Mafic and ultramafic rocks that comply with the definition of
the ophiolite sequence are grouped into six major ophiolitic
belts. Four of these belts strike north while the other two
belts strike east to northeast. These ophiolite belts include:
1. The Amar-Idsas ophiolite belt
2. Jabal Humayyan–Jabal Sabhah ophiolite belt
3. The Bijadiah-Halaban ophiolite belt
4. Hulayfah-Hamdah “Nabitah” ophiolite belt
5. Bi’r Umq–Jabal Thurwah ophiolite belt
6. Jabal Wasq–Jabal Ess ophiolite belt
These rocks were among other mafic and ultramafic
rocks considered as parts of ophiolite sequences, but later
only these six belts were considered to comply with the definition
of ophiolite sequences. However, the sheeted dike complex
of the typical ophiolite sequence is not clear or absent in
some of these belts, suggesting that the dikes may have been
obscured by metamorphism, regional deformation, and alteration.
These belts are considered to represent suture zones,
where convergence between plates or island arc systems took
place, and are considered as the boundaries between different
tectonic terranes in the shield.
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