Geochronology of anorogenic igneous complexes in the Sudan: isotopic investigations in North Kordofan, the Nubian Desert and the Red Sea Hills

Höhndorf, A.; Meinhold, Klaus-Dieter; Vail, J. R.

doi:10.1016/0899-5362(94)90032-9

Cited by 13 publications

(9 citation statements)

References 16 publications

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“…Faulting and local uplifting of basin shoulders favored terrigenous sedimentation in these basins. Also noticeable is the strong rejuvenation of alkaline magmatic activity registered during Middle Triassic times in the Nubia and Kordofan provinces of southern Egypt-central Sudan (Vail, 1989;Hö hndorf et al, 1994).…”

Section: Triassicmentioning

confidence: 96%

Phanerozoic geological evolution of Northern and Central Africa: An overview

Guiraud

Bosworth

Thierry

et al. 2005

Journal of African Earth Sciences

689

432

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Section: Triassicmentioning

confidence: 96%

Phanerozoic geological evolution of Northern and Central Africa: An overview

Guiraud

Bosworth

Thierry

et al. 2005

Journal of African Earth Sciences

689

432

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“…Cambrian post-orogenic plutonic rocks are known from the Arabian-Nubian Shield and SE Africa and Madagascar (Fritz et al 2013). Cambrian and Ordovician alkaline and peralkaline plutonic rocks occur in Egypt and Sudan (Höhndorf et al 1994;Woolley, 2001;Veevers, 2007). In addition, early Palaeozoic post-orogenic plutonic rocks, volcanic rocks and related products, such as volcanic ash beds (K-bentonites), as described from the Middle Ordovician of Libya (Ramos et al 2003), and ascribed to volcanic activity along the northern margin of Gondwana during that time, could be an additional or alternative source (Meinhold et al 2011;Lewin et al 2020a).…”

Section: A Possible Source Areasmentioning

confidence: 99%

Detrital zircon provenance of north Gondwana Palaeozoic sandstones from Saudi Arabia

et al. 2020

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We present the first comprehensive detrital zircon U–Pb age dataset from Palaeozoic sandstones of Saudi Arabia, which provides new insights into the erosion history of the East African Orogen and sediment recycling in northern Gondwana. Five main age populations are present in varying amounts in the zircon age spectra, with age peaks at ~625 Ma, ~775 Ma, ~980 Ma, ~1840 Ma and ~2480 Ma. Mainly igneous rocks of the Arabian–Nubian Shield are suggested to be the most prominent sources for the Ediacaran to middle Tonian zircon grains. Palaeoproterozoic and Archaean grains may be xenocrystic zircons or they have been recycled from older terrigenous sediment. A primary derivation from Palaeoproterozoic and Archaean basement is also possible, as rocks of such age occur in the vicinity. Approximately 4 % of the detrital zircons show Palaeozoic (340–541 Ma) ages. These grains are likely derived from Palaeozoic post-orogenic and anorogenic igneous rocks of NE Africa and Arabia. A few single grains gave up to Eoarchaean (3.6–4.0 Ga) ages, which are the oldest zircons yet described from Arabia and its vicinity. Their origin, however, is yet unknown. Detrital zircons with U–Pb ages of ~1.0 Ga are present in varying amounts in all of the samples and are a feature of terrigenous sediment belonging to the Gondwana super-fan system with an East African – Arabian zircon province.

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“…The Ordovician section in Jordan also contains 530-440 Ma post-Neoproterozoic grains, implying their possible derivation from sources such as the peralkaline granites of Ras Gharib in the eastern desert of Egypt (Abdel-Rahaman & Doig, 1987) or intrusions in the Red Sea Hills of Sudan (Hohndorf, Meinhold & Vail, 1994) where Cambrian-Ordovician igneous activity occurred.…”

Section: Provenance Of the Cambrian-ordovician Successionmentioning

confidence: 99%

Provenance of north Gondwana Cambrian–Ordovician sandstone: U–Pb SHRIMP dating of detrital zircons from Israel and Jordan

et al. 2006

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-A vast sequence of quartz-rich sandstone was deposited over North Africa and Arabia during Early Palaeozoic times, in the aftermath of Neoproterozoic Pan-African orogeny and the amalgamation of Gondwana. This rock sequence forms a relatively thin sheet (1-3 km thick) that was transported over a very gentle slope and deposited over a huge area. The sense of transport indicates unroofing of Gondwana terranes but the exact provenance of the siliciclastic deposit remains unclear. Detrital zircons from Cambrian arkoses that immediately overlie the Neoproterozoic Arabian-Nubian Shield in Israel and Jordan yielded Neoproterozoic U-Pb ages (900-530 Ma), suggesting derivation from a proximal source such as the Arabian-Nubian Shield. A minor fraction of earliest Neoproterozoic and older age zircons was also detected. Upward in the section, the proportion of old zircons increases and reaches a maximum (40 %) in the Ordovician strata of Jordan. The major earliest Neoproterozoic and older age groups detected are 0.95-1.1, 1.8-1.9 and 2.65-2.7 Ga, among which the 0.95-1.1 Ga group is ubiquitous and makes up as much as 27 % in the Ordovician of Jordan, indicating it is a prominent component of the detrital zircon age spectra of northeast Gondwana. The pattern of zircon ages obtained in the present work reflects progressive blanketing of the northern Arabian-Nubian Shield by Cambrian-Ordovician sediments and an increasing contribution from a more distal source, possibly south of the Arabian-Nubian Shield. The significant changes in the zircon age signal reflect many hundreds of kilometres of southward migration of the provenance.

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Geochronology of anorogenic igneous complexes in the Sudan: isotopic investigations in North Kordofan, the Nubian Desert and the Red Sea Hills

Cited by 13 publications

References 16 publications

Phanerozoic geological evolution of Northern and Central Africa: An overview

Phanerozoic geological evolution of Northern and Central Africa: An overview

Detrital zircon provenance of north Gondwana Palaeozoic sandstones from Saudi Arabia

Provenance of north Gondwana Cambrian–Ordovician sandstone: U–Pb SHRIMP dating of detrital zircons from Israel and Jordan

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