Geophysical imaging of ophiolite structure in the United Arab Emirates

Ali, M. Y. and Watts, A. B. and Searle, M. P. and Keats, B. and Pilia, S. and Ambrose, T. (2020) Geophysical imaging of ophiolite structure in the United Arab Emirates. Nature Communications, 11 (1). ISSN 2041-1723 DOI https://doi.org/10.1038/s41467-020-16521-0

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Official URL: https://doi.org/10.1038/s41467-020-16521-0

Abstract

The Oman-United Arab Emirates ophiolite has been used extensively to document the geological processes that form oceanic crust. The geometry of the ophiolite, its extension into the Gulf of Oman, and the nature of the crust that underlies it are, however, unknown. Here, we show the ophiolite forms a high velocity, high density, >15 km thick east-dipping body that during emplacement flexed down a previously rifted continental margin thereby contributing to subsidence of flanking sedimentary basins. The western limit of the ophiolite is defined onshore by the Semail thrust while the eastern limit extends several km offshore, where it is defined seismically by a ~40–45°, east-dipping, normal fault. The fault is interpreted as the southwestern margin of an incipient suture zone that separates the Arabian plate from in situ Gulf of Oman oceanic crust and mantle presently subducting northwards beneath the Eurasian plate along the Makran trench.

Item Type: Article
Uncontrolled Keywords: 2020AREP; IA76
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
07 - Gold Open Access
Journal or Publication Title: Nature Communications
Volume: 11
Identification Number: https://doi.org/10.1038/s41467-020-16521-0
Depositing User: Sarah Humbert
Date Deposited: 30 Jun 2020 00:57
Last Modified: 30 Jun 2020 00:57
URI: http://eprints.esc.cam.ac.uk/id/eprint/4773

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