Saudi Arabian seismic-refraction profile: A traveltime interpretation of crustal and upper mantle structure

Mooney, Walter D.; Gettings, M.E.; Blank, H.R.; Healy, J. H.

doi:10.1016/0040-1951(85)90287-2

Cited by 226 publications

(122 citation statements)

References 11 publications

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“…However a mean 0.25 Poisson's ratio for the middle and lower crusts seems reasonable. The CMT and the uppermost mantle imaged by our inversion are in excellent agreement with those inferred by Mooney et al (1985) beneath SODA, BISH and RANI, but the sharp Moho discontinuity imaged in Mooney et al (1 985) and Badri (1990) beneath HALM and RAYN contrasts with our gradational CMTs. The PpPms reverberated phase, which gives a measure of the sharpness of the CMT, is generally well matched by our models in the low-frequency receiver functions, but it is seldom modeled in the high-frequency receiver functions, partly because of the bandwidth differences in long periods.…”

Section: Inversion Results At Raynsupporting

confidence: 88%

“…These studies are based upon surfacewave dispersion measurements (Mokhtar and Al-Saeed, 1994;Ghalib, 1992;Mokhtar et al, 1988;Mokhtar et al, 2001;Rodgers et al, 1999), receiver functions (Sandvol et al, 1998) and seismic refraction surveys (Mooney et al, 1985;Prodehl, 1985;Badri, 1991). Additionally, ~itzwoller and Levshin (1 998) and Ritzwoller et al ( 1 998) produced tomographic maps from surface-wave group velocities across all of Eurasia, which are at a length scale intermediate between regional and global surface-wave studies.…”

Section: Previous ~Eophysical Studiesmentioning

confidence: 99%

“…Former studies (Sandvol et al, 1998;Mooney et al, 1985) suggested upper mantle velocity changes beneath the Arabian Shield, so we invert for structure to a 100 krn depth. In this section we will show that this poses some interesting problems in the inversion.…”

Section: Joint Linearized Inversion With Constraintsmentioning

confidence: 99%

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Lithospheric Structure of the Arabian Shield from the Joint Inversion of Receiver Function and Surface-Wave Dispersion Observations

Julià¹,

Ammon²,

Herrimann³

2006

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Section: Inversion Results At Raynsupporting

confidence: 88%

Section: Previous ~Eophysical Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Lithospheric Structure of the Arabian Shield from the Joint Inversion of Receiver Function and Surface-Wave Dispersion Observations

Julià¹,

Ammon²,

Herrimann³

2006

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“…2). The island marks the end point for the deep seismic refraction profile that was interpreted by Mooney et al [11]. We found 24 receiver functions corresponding to events east, southeast, and northwest of the station (Fig.…”

Section: Frsssupporting

confidence: 62%

“…Both of these experiments were primarily focused on the southern part of the shield and ran from near the Red Sea coast to the western portion of the platform. Results from both experiments suggest that the Arabian shield has an average crustal thickness of 40 km, thinning rapidly near the Red Sea coast and gradually increasing toward the platform [11][12][13][14]. Specifically in the Arabian platform, Al-Amri [15,16] reported a 46 km thick crust under RIYD station ( Fig.…”

Section: Introductionmentioning

confidence: 90%

Crustal structure of the Arabian plate: new constraints from the analysis of teleseismic receiver functions

Aldamegh¹,

Sandvol²,

Barazangi³

2005

Earth and Planetary Science Letters

133

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We also employed a grid search waveform modeling technique to estimate the crustal velocity structure for seven stations. A jackknife re-sampling approach was used to estimate errors in the grid search results for three stations. In addition to our results, we have also included published receiver function results from two temporary networks in the Arabian shield and Oman as well as three permanent GSN stations in the region.The average crustal thickness of the late Proterozoic Arabian shield is 39 km. The crust thins to about 23 km along the Red Sea coast and to about 25 km along the margin of the Gulf of Aqaba. In the northern part of the Arabian platform, the crust varies from 33 -37 km thick.However, the crust is thicker (41 -53 km) in the southeastern part of the platform. There is a dramatic change in crustal thickness between the topographic escarpment of the Arabian shield and the shorelines of the Red Sea. We compared our results in the Arabian shield to nine other Proterozoic and Archean shields that include reasonably well-determined Moho depths, mostly based on receiver functions. The average crustal thickness for all shields is 39 km, while the average for Proterozoic shields is 40 km, and the average for Archean shields is 38 km. We found the crustal thickness of Proterozoic shields to vary between 33 and 44 km, while Archean shields vary between 32 and 47 km. Overall, we do not observe a significant difference between Proterozoic and Archean crustal thickness. 3We observed a dramatic change in crustal thickness along the Red Sea margin that occurs over a very short distance. We projected our results over a cross section extending from the Red Sea ridge to the shield escarpment and contrasted it with a typical Atlantic margin. The transition from oceanic to continental crust of the Red Sea margin occurs over a distance of about 250 km, while the transition along a typical portion of the western Atlantic margin occurs at a distance of about 450 km. This important new observation highlights the abruptness of the breakup of Arabia. We argue that a preexisting zone of weakness coupled with anomalously hot upper mantle could have initiated and expedited the breakup.

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Abbot Ice Shelf, structure of the Amundsen Sea continental margin and the southern boundary of the Bellingshausen Plate seaward of West Antarctica

Cochran

Tinto

Bell

2015

Geochem Geophys Geosyst

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Inversion of NASA Operation IceBridge airborne gravity over the Abbot Ice Shelf in West Antarctica for subice bathymetry defines an extensional terrain made up of east-west trending rift basins formed during the early stages of Antarctica/Zealandia rifting. Extension is minor, as rifting jumped north of Thurston Island early in the rifting process. The Amundsen Sea Embayment continental shelf west of the rifted terrain is underlain by a deeper, more extensive sedimentary basin also formed during rifting between Antarctica and Zealandia. A well-defined boundary zone separates the mildly extended Abbot extensional terrain from the deeper Amundsen Embayment shelf basin. The shelf basin has an extension factor, β, of 1.5–1.7 with 80–100 km of extension occurring across an area now 250 km wide. Following this extension, rifting centered north of the present shelf edge and proceeded to continental rupture. Since then, the Amundsen Embayment continental shelf appears to have been tectonically quiescent and shaped by subsidence, sedimentation, and the advance and retreat of the West Antarctic Ice Sheet. The Bellingshausen Plate was located seaward of the Amundsen Sea margin prior to incorporation into the Antarctic Plate at about 62 Ma. During the latter part of its independent existence, Bellingshausen plate motion had a clockwise rotational component relative to Antarctica producing convergence across the north-south trending Bellingshausen Gravity Anomaly structure at 94°W and compressive deformation on the continental slope between 94°W and 102°W. Farther west, the relative motion was extensional along an east-west trending zone occupied by the Marie Byrd Seamounts.Key Points:Abbot Ice Shelf is underlain by E-W rift basins created at ∼90 Ma Amundsen shelf shaped by subsidence, sedimentation, and passage of the ice sheet Bellingshausen plate boundary is located near the base of continental slope and rise

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Saudi Arabian seismic-refraction profile: A traveltime interpretation of crustal and upper mantle structure

Cited by 226 publications

References 11 publications

Lithospheric Structure of the Arabian Shield from the Joint Inversion of Receiver Function and Surface-Wave Dispersion Observations

Lithospheric Structure of the Arabian Shield from the Joint Inversion of Receiver Function and Surface-Wave Dispersion Observations

Crustal structure of the Arabian plate: new constraints from the analysis of teleseismic receiver functions

Abbot Ice Shelf, structure of the Amundsen Sea continental margin and the southern boundary of the Bellingshausen Plate seaward of West Antarctica

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