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| Aqaba Transform Fault | |
|---|---|
| Name | Aqaba Transform Fault |
| Other names | Gulf of Aqaba Fault |
| Type | Strike-slip fault |
| Location | Red Sea Rift, Dead Sea Transform region, Gulf of Aqaba |
| Length km | ~160 |
| Plate boundary | African Plate–Arabian Plate |
| Coordinates | 29°N 34°E |
Aqaba Transform Fault is a major right-lateral strike-slip structure linking the Red Sea Rift with the Dead Sea Transform and influencing tectonics across the Levant, Arabian Peninsula, and northeastern Africa. The fault traverses the Gulf of Aqaba and shapes the tectonic framework between the African Plate and the Arabian Plate, with implications for seismic hazard in Jordan, Israel, Egypt, and Saudi Arabia. It interacts with multiple rift and transform segments and has been studied by geologists, seismologists, and geophysicists from institutions such as the United States Geological Survey, King Abdullah University of Science and Technology, and the Geological Survey of Israel.
The fault lies within the broader plate boundary system that includes the Red Sea Rift, Dead Sea Transform, East African Rift, and the Sinai Peninsula. It accommodates relative motion between the African Plate and the Arabian Plate and connects spreading at the Gulf of Suez Rift to transform displacement toward the Dead Sea Basin and the Levantine Corridor. Regional geology incorporates Neogene volcanics, Pleistocene sediments, and Mesozoic carbonate platforms such as the Nubian Sandstone and Aqaba Complex. The tectonic mosaic also comprises thrusts and normal faults associated with the Suez Rift and transtensional features near the Red Sea and the Gulf of Aden.
The fault system consists of en echelon strike-slip segments, pull-apart basins, and transtensional depressions including the Elat (Aqaba) Basin and the Gulf of Aqaba basin. Structural elements include steeply dipping fault planes, strike-slip duplexes, bookshelf faulting, and short-scale relay ramps similar to features mapped along the San Andreas Fault and the North Anatolian Fault. Fault geometry displays stepovers, oblique-slip zones, and linkage to oblique spreading centers comparable to the Dead Sea Transform’s segment boundaries. Mapping by the Geological Survey of Jordan and marine seismic reflection studies by the National Oceanography Centre have resolved strike lengths, fault throws, and segmentation patterns.
Seismicity along the transform has produced historic and instrumental earthquakes affecting Aqaba (Elat), Gulf of Aqaba, Eilat, Jerusalem, and adjacent regions. Notable events include the 1995 Nuweiba earthquake sequence and earlier historical shocks reported in chronicles associated with the Ottoman Empire and Mamluk Sultanate periods. Modern seismic networks operated by the Israel Geological Survey, Jordan Seismological Observatory, and the International Seismological Centre record microseismicity, aftershock sequences, and rupture propagation along mapped segments. Paleoseismology trenches near the Dead Sea and coastal uplift indicators in Sinai have been used to estimate recurrence intervals, slip rates, and moment release compared with global transform systems like the Queen Charlotte Fault.
Surface expressions include linear escarpments, shutter ridges, sag ponds, and lake basins aligned with the fault trace near Taba, Aqaba, and southern Sinai Governorate. Coastal morphology around Gulf of Aqaba shows fault-controlled submarine canyons, fault scarps exposed in Trachytic and Basalt outcrops, and stepped marine terraces correlated with uplift episodes recorded in the Levantine Basin. Wadi systems such as Wadi Araba and alluvial fans reveal offset channels and deflected drainages analogous to features along the Dead Sea Transform and Garlock Fault.
Kinematic models integrate GPS data from campaigns by Scripps Institution of Oceanography, King Abdulaziz City for Science and Technology, and regional continuous stations managed by EUROCONTROL partners, constraining right-lateral rates of a few millimeters per year. The transform facilitates accommodation of oblique divergence from the Red Sea and rotational motion of the Arabian Plate relative to the Eurasian Plate and the African Plate. Plate reconstructions linking Mesozoic rifting, Neogene opening of the Red Sea, and Quaternary faulting use marine magnetic anomalies, coral terraces, and paleomagnetic studies from institutions like the British Geological Survey.
Hydrothermal circulation along fault conduits has produced seawater-driven fluid flow, carbonate precipitation, and authigenic mineral deposits observed in the Aqaba margin and submarine springs mapped by the Woods Hole Oceanographic Institution. Mineralization includes authigenic manganese, sulfide enrichments, and alteration halos within basaltic and carbonate sequences similar to hydrothermal fields near the Mid-Atlantic Ridge and Gakkel Ridge. Fault-controlled upwelling supports chemosynthetic communities and influences marine biodiversity documented by teams from the Israel Oceanographic and Limnological Research institute and the Red Sea Research Center.
Research combines geological mapping by the Geological Survey of Egypt and the Geological Survey of Israel, marine geophysical surveys by the Lamont–Doherty Earth Observatory, and paleoseismic trenching led by universities such as Hebrew University of Jerusalem and Jordan University of Science and Technology. Methods include multichannel seismic reflection, bathymetric mapping with ROVs used by the Royal Netherlands Institute for Sea Research, GPS geodesy, seismic tomography by the Global Seismographic Network, and radiometric dating (U-Th, OSL) performed at laboratories like the Max Planck Institute for Chemistry. Collaborative projects involving the United Nations Educational, Scientific and Cultural Organization and regional ministries have advanced hazard assessment, tectonic modeling, and resource appraisal.
Category:Seismic faults Category:Plate tectonics Category:Red Sea