Basement structure of the United Arab Emirates derived from an analysis of regional gravity and aeromagnetic database

Ali, Mohammed Y.; Fairhead, J.D.; Green, Christopher M.; Noufal, Abdelwahab

doi:10.1016/j.tecto.2017.06.006

Cited by 61 publications

(20 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bouguer anomalies increase from near zero values at the western limit of the onshore mantle ophiolite to maximum values of~170 mGal over the crust ophiolite at the coast. Magnetic anomalies are subdued over the onshore mantle ophiolite outcrop, but increase towards the coast, and offshore there is a~12 km wide belt of high amplitude short wavelength magnetic anomalies 16 that we believe reflects the seaward extension of the crust ophiolite.…”

Section: Resultsmentioning

confidence: 63%

“…Well data (e.g. from the Shah field), together with gravity and aeromagnetic modelling 16 , suggest a Proterozoic basement that was deformed during a Carboniferous-early Permian orogenic event. The lower crust is interpreted here as comprising Late Cretaceous high-temperature granulite facies meta-carbonate and meta-quartzite rocks, similar to rocks exposed in the Bani Hamid thrust sheet in the UAE 11 .…”

Section: Discussionmentioning

confidence: 99%

“…Offshore the magnetic data were corrected for diurnal and secular variation. Onshore we used an aeromagnetic database 16 .…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Geophysical imaging of ophiolite structure in the United Arab Emirates

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Geophysical imaging of ophiolite structure in the United Arab Emirates

et al. 2020

View full text Add to dashboard Cite

show abstract

“…This may support the notion of a major episode of thermal uplift in the Early Carboniferous. In agreement with this interpretation, Ali et al () mapped possible Late Paleozoic NW‐trending volcanic/magmatic bodies in the central and northwestern UAE using aeromagnetic data.…”

Section: Geological Settingmentioning

confidence: 65%

Subsidence History and Seismic Stratigraphy of the Western Musandam Peninsula, Oman–United Arab Emirates Mountains

Ali¹,

Aidarbayev

Searle

et al. 2018

Tectonics

View full text Add to dashboard Cite

Seismic reflection profiles, exploratory well, and outcrop data are used to determine the stratigraphy and tectonic subsidence and uplift history of the western Musandam peninsula. Five major regional megasequences have been recognized: (1) Permian to Late Cretaceous rifted margin sequence, (2) Late Cretaceous Aruma foreland basin sequence that evolved in response to the obduction of the Semail Ophiolite, (3) early–mid‐Cenozoic Pabdeh foreland basin sequence that formed due to orogenic loading associated with the early continent–continent collision of the Arabian and Eurasian plates in the Zagros mountains of central Iran, (4) a sequence above the mid‐Miocene unconformity that marks the final stage of continent–continent collision, and (5) a sequence above the late Pliocene unconformity interpreted as tilting due to the latest stage of continent–continent collision. In addition, seismic and outcrop data captured multiple west‐verging and east‐dipping thrust faults associated with the deformation of the Hagab thrust, which causes repetition of the Permian–Mesozoic shelf sequence and the early–mid Cenozoic foreland basin sequence. The tectonic subsidence and uplift derived from backstripping can be explained by a model in which the margin developed by uniform depth extension with an initial age of rifting of 260 Ma and a final age of rifting of 185 Ma. Moreover, the tectonic subsidence indicates two compressional events that commenced at ~94 Ma and ~25 Ma, respectively. These events are attributed to the obduction of the Semail Ophiolite and the culmination of the Musandam peninsula, respectively.

show abstract

“…Aeromagnetic data are a valuable source of geological information. Regional datasets have been commonly used to (1) establish the depth to the Curie Point and hence the thermal structure of large areas (Andres et al., 2018; Lawal & Nwankwo, 2017; Salem et al., 2014), (2) to unravel the basement structure and depth (Ali et al., 2017; Baptiste et al., 2016; Bascou et al., 2013), (3) to map mineral deposits (Dufréchou et al., 2015) and fractures (Grauch et al., 2001), (iv) to establish relationships with certain types of mineralizations (Sant'Ovaia et al., 2013, pp. 33–39), (v) to contribute to the knowledge of crustal structure and evolution (Calvín et al., 2014; Pedreira et al., 2007), etc.…”

Section: Introductionmentioning

confidence: 99%

Characterizing the Source of the Eastern Galicia Magnetic Anomaly (NW Spain): The Role of Extension in the Origin of Magnetization at the Central Iberian Arc

et al. 2021

View full text Add to dashboard Cite

show abstract

Basement structure of the United Arab Emirates derived from an analysis of regional gravity and aeromagnetic database

Abstract: This is a repository copy of Basement structure of the United Arab Emirates derived from an analysis of regional gravity and aeromagnetic database.

Cited by 61 publications

References 45 publications

Geophysical imaging of ophiolite structure in the United Arab Emirates

Geophysical imaging of ophiolite structure in the United Arab Emirates

Subsidence History and Seismic Stratigraphy of the Western Musandam Peninsula, Oman–United Arab Emirates Mountains

Characterizing the Source of the Eastern Galicia Magnetic Anomaly (NW Spain): The Role of Extension in the Origin of Magnetization at the Central Iberian Arc

Contact Info

Product

Resources

About