Nd, Pb, Sr, and O isotopic characterization of Saudi Arabian Shield terranes

Stoeser, Douglas B.; Frost, Carol D.

doi:10.1016/j.chemgeo.2005.09.019

Cited by 244 publications

(130 citation statements)

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“…Stoeser and Frost (2006) divided the Arabian segment of the shield into several allochthonous terranes based on distinct Nd, Sr, Pb, and O isotope signatures. Importantly, the eastern arc terrane is characterized by more continentallike isotope compositions compared to the western arc terrane of oceanic affinity.…”

Section: Introductionmentioning

confidence: 99%

Nd–Sr–Hf–O isotope provinciality in the northernmost Arabian–Nubian Shield: implications for crustal evolution

Be’eri-Shlevin

Katzir

Blichert‐Toft

et al. 2009

Contrib Mineral Petrol

103

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Multi-isotope study including whole-rock NdSr, single zircon Hf, and SIMS d 18 O analyses of zircons sheds light on magma sources in the northernmost Arabian-Nubian Shield (ANS) during *820-570 Ma. Reconnaissance initial Nd and Sr isotope data for the older rocks (*820-740 Ma) reaffirms previous estimates that early crustal evolution in this part of the shield involved some crustal contamination by pre-ANS material. Prominent isotope provinciality is displayed by post-collisional calc-alkaline and alkaline igneous rocks of *635-570 Ma across a NW-SE transect across basement of the Sinai Peninsula (Egypt) and southern Israel. Silicic rocks of the NW-region are characterized by lower eNd(T)-eHf(T) and higher Sr i and d 18 O compared with rocks of the SE-region, and the transition between the regions is gradual. Within each region isotope ratios are independent of the extent of magma fractionation, and zircon cores and rims yield similar d 18 O values. Comparison with southern segments of the ANS shows that the source for most *635-570 Ma rocks can be modeled as the isotopically aged lowerintermediate crust in the ANS core (SE-region) and its northern, more contaminated ANS margins (NW-region). Nevertheless, Nd-Sr isotope enrichment of the lithospheric mantle is indicated by some basic magmas of the NWregion displaying the most enriched Nd-Sr isotope compositions. Comparison of Nd and Hf depleted mantle model ages for rocks of the SE-region may indicate that crustal formation events in the ANS geographical core took place at 1.1-1.2 Ga and were followed by crustal differentiation starting at *0.9 Ga.

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Section: Introductionmentioning

confidence: 99%

Nd–Sr–Hf–O isotope provinciality in the northernmost Arabian–Nubian Shield: implications for crustal evolution

Be’eri-Shlevin

Katzir

Blichert‐Toft

et al. 2009

Contrib Mineral Petrol

103

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“…The latter is characterized by juvenile material from Pan-African magmatic arcs and accretion of island-arcs (e.g. Küster and Liégois 1998;Stern and Abdelsalam 1998;Teklay et al 2001;Bailo et al 2003;Stoeser and Frost 2006). Beyond this large scale subdivision, local occurrences of juvenile basement are known west of the Pan-African suture (e.g.…”

Section: Isotope Signature Of the Pan-african Basementmentioning

confidence: 99%

“…6c; Pallister et al 1988;Brueckner et al 1995;Zimmer et al 1995;Stern and Abdelsalam 1998;Bailo et al 2003). The widespread juvenile Pan-African magmatic crust of the Arabian Plate shows a similar isotope composition (Stacey and Stoeser 1984; new data and compilation in Stoeser and Frost 2006). …”

Section: Isotope Signature Of the Pan-african Basementmentioning

confidence: 99%

“…1). The Proterozoic basement of the Arabian plate consists of PanAfrican arc assemblages and comprises numerous crustal blocks (terranes) with abundant juvenile material from island arcs, which were accreted to the continental margin (e.g., Stern 1994;Teklay et al 2001;Bailo et al 2003;Stoeser and Frost 2006). The lithospheric mantle beneath island arcs is expected to represent depleted oceanic mantle and the former mantle wedge.…”

Section: Origin Of the Radiogenic Pb In The Lithospheric Mantle And Imentioning

confidence: 99%

“…Kröner et al 1987;Stern 1994;Küster and Harms 1998;Küster and Liégeois 2001;Stoeser and Frost 2006). The basement comprises reworked older crust of the cratons and juvenile crust.…”

Section: Geological Setting and Age Relationsmentioning

confidence: 99%

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Nd, Pb, and Sr isotope composition of Late Mesozoic to Quaternary intra-plate magmatism in NE-Africa (Sudan, Egypt): high-μ signatures from the mantle lithosphere

Lucassen

Franz

Romer

et al. 2008

Contrib Mineral Petrol

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The isotopic composition of mafic small-volume intra-plate magmatism constrains the compositions of the sub-continental mantle sources. The Nd, Pb, and Sr isotope signatures of widespread late Mesozoic to Quaternary intra-plate magmatism in NE Africa (Sudan, South Egypt) are surprisingly uniform and indicate the presence of a high-µ (µ= 238 U/ 204 Pb) source in the mantle. The rocks are characterized by small ranges in the initial isotopic composition of Nd, Pb, and Sr and most samples fall within ε Nd ca 3 to 6, 206 Sr/ 86 Sr ca. 0.7028 to 0.7034. We interpret this reservoir as lithospheric mantle that formed beneath the Pan-African orogens and magmatic arcs from asthenospheric mantle, which was enriched in trace elements (U, Th, and light REE). Combining our new data set with published data of intra-plate magmatic rocks from the Arabian plate indicates two compositionally different domains of lithospheric mantle in NE-Africa -Arabia. The two domains are spatially related to the subdivision of the Pan-African orogen into a western section dominated by reworked cratonic basement (NEAfrica; high-µ lithospheric mantle) and an eastern section dominated by juvenile Pan-African basement (easternmost NE-Africa and Arabia; moderate µ lithospheric mantle). The compositions of the Pan-African lithospheric mantle and the MORB-type mantle of the Red Sea and Gulf of Aden spreading centers could explain the Nd-Pb-Sr isotopic compositions of the most pristine Afar flood basalts in Yemen and Ethiopia by mixtures of the isotopic composition of regional lithospheric and asthenospheric sources.

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Tectonic paleostress fields in the southwestern part of Jordan: New insights from the fault slip data in the southeastern flank of the Dead Sea Fault Zone

Radaideh

Melichar

2015

Tectonics

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A new approach for paleostress analysis, using the nine-dimensional space fault slip inversion method, was performed in the southeastern flank of the Jordan-Dead Sea Fault. Five major tectonic episodes with different kinematics were successfully detected from the inversion of a new fault slip data, which thereby caused reactivation of inherited crustal structures and established new ones. These episodes prevailed since Late Cretaceous times, and their chronological constraints were established essentially from the stratigraphic ages of the affected rocks and the crosscutting relationships of successive striae locally observed on the fault planes. During the Late Cretaceous to late Eocene, the area was under a compressional/strike-slip stress regime with a~E-W trending σ 1 . At Oligocene, a strike-slip stress regime with NW-SE striking σ 1 occurred. Both compression regimes correspond to the so-called Syrian Arc Deformation that gave rise to distinctive folds in Jordan and its surrounding areas. An extension with~N-S to NE-SW trending σ 3 followed the late Oligocene compression event and took place during Miocene time, most probably linked to the opening of the Red Sea-Suez Rift. Late Cenozoic tectonics show the occurrence of two successive compressions, NW-SE then both NE-SW and~N-S, which generally reflect a continental collisional setting between the Arabian and Eurasian plates.

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Nd, Pb, Sr, and O isotopic characterization of Saudi Arabian Shield terranes

Cited by 244 publications

References 60 publications

Nd–Sr–Hf–O isotope provinciality in the northernmost Arabian–Nubian Shield: implications for crustal evolution

Nd–Sr–Hf–O isotope provinciality in the northernmost Arabian–Nubian Shield: implications for crustal evolution

Nd, Pb, and Sr isotope composition of Late Mesozoic to Quaternary intra-plate magmatism in NE-Africa (Sudan, Egypt): high-μ signatures from the mantle lithosphere

Tectonic paleostress fields in the southwestern part of Jordan: New insights from the fault slip data in the southeastern flank of the Dead Sea Fault Zone

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