Structure of the sheeted dike complex of the Samail Ophiolite near Ibra, Oman
- 10 April 1981
- journal article
- Published by American Geophysical Union (AGU) in Journal of Geophysical Research
- Vol. 86 (B4) , 2661-2672
- https://doi.org/10.1029/jb086ib04p02661
Abstract
The sheeted dike complex is a regionally mappable geologic unit with a consistent position in the Samail ophiolite stratigraphy. Discontinuous exposures of the complex in the Ibra area of the southeast Oman Mountains provide structural data that allow reconstruction of a paleo‐spreading ridge axis of 347° for the region and suggests a maximum spreading width of 275 km for the ophiolite. Contact relations within the well‐exposed Al Ahmadi section indicate that the complex was formed by multiple parallel intrusion over a narrow zone at the paleo‐ridge axis. Split dikes are abundant; facing directions indicate a spreading ridge southwest of the present outcrop area, in conflict with other spreading axis direction indicators.Keywords
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