Devonian palynology of Saudi Arabia

Hemer, Darwin O.; Nygreen, Paul W.

doi:10.1016/0034-6667(67)90208-4

Cited by 19 publications

(7 citation statements)

References 3 publications

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“…in the Sakakah area. Palynological evidence by Hemer (, ) and Hemer and Nygreen () identified Middle and Upper Devonian spores. Boucot, () described brachiopods from the Jauf and gastropods, brachiopods and bivalves from the underlying Lower Devonian Tawil Sandstone.…”

Section: Geological Frameworkmentioning

confidence: 99%

Facies mosaic and diagenetic patterns of the early Devonian (Late Pragian–Early Emsian) microbialite‐dominated carbonate sequences, Qasr Member, Jauf Formation, Saudi Arabia

2015

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The Al-Jawf area of northern Saudi Arabia provides spectacular outcrops of Early Devonian carbonate bioherms in the Wadi Murayr and Dumat Al-Jandal areas. These carbonate bioherms belong to the Qasr Member of the Late Pragian-Early Emsian Jauf Formation (~405 Ma) and are surrounded by a bioclastic carbonate succession. The Qasr Member is the first major carbonate unit of the Palaeozoic succession in Saudi Arabia that mainly consists of microbialite carbonates and metazoan reefs exhibiting distinct mound features. These bioherm complexes and their associated carbonate facies are pervasively dolomitized. Stratigraphic, petrographic and geochemical analyses were conducted to determine the facies distribution and interpret their depositional and diagenetic processes. A total of 11 facies are identified from a range of depositional environments within a carbonate platform system, ranging from tidal flats, lagoon, shoal, patch reefs to reef front. The main diagenetic processes are carbonate cementation and dolomitization. Dolomitization occurred as both fabric preserved (mostly in grain-dominated facies) and fabric destructive (mud-dominated facies). The microbialites and coralline sponges facies show poor reservoir with visual porosity less than 5%, but this succession may have a potential to serve as a good source for the underlying and overlying facies. Ooid and peloidal grainstone facies show fair to good visual porosity that locally exceeds 10% with intergranular porosity as the dominant type. However, in the most studied samples, vuggy and intraparticle porosities are observed as the dominant type.

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Section: Geological Frameworkmentioning

confidence: 99%

Facies mosaic and diagenetic patterns of the early Devonian (Late Pragian–Early Emsian) microbialite‐dominated carbonate sequences, Qasr Member, Jauf Formation, Saudi Arabia

2015

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“…Their fossil content indicates that the lower unit is of Middle-Upper Devonian age, and underlies a Middle Cretaceous siliciclastic sequence (the Wasia Formation). Hemer and Nygreen (1967) recognized four palynological zones in the Middle -Upper Devonian succession underlying the Middle Cretaceous siliciclastic sequence in borehole ,9462 (Section D, Fig. 7).…”

Section: Surface-subsurface Stratigraphic Relationshipsmentioning

confidence: 99%

“…As the siliciclastic sequence overlying the Middle-Upper Devonian succession in borehole S-462 has yielded Middle Cretaceous fossils (Hemer and Nygreen, 1967), the upper unit of the exposed Sakaka Sandstone, consisting of cross-bedded clean sandstone (F-4) and sandstone with fine clastic-calcareous rocks (F-5,) may be considered to be…”

Section: Surface-subsurface Stratigraphic Relationshipsmentioning

confidence: 99%

Chronostratigraphy and Hydrocarbon Prospects of the Sakaka Formation, Northern Arabia

Sharief

Moshrif

1989

Journal of Petroleum Geology

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The age of the so-called Sakaka Sandstone exposed in the al-Jawf area, northern Saudi Arabia, has in the past been disputed. It is assigned here to the Middle -Lute Devonian and Middle Cretaceous. This age has been established from correlations of sugacesubsugace sections utilising palynological and lithological data, and also from the regional geological framework. The sequence is divided into two units. The lower unit, composed of non-marine clastic sediments. is Middle-Lute Devonian. The upper unit, consisting of clastic and mixdjinec h i c and calcareous shoreline-shallow marine deposits, is considered to be part of the Middle Cretaceous Wasia Formation.The name "Sakaka Formation" is now restricted to the lower unit of the Middle -Upper Devonian sequence. This Formation forms a well-exposed and lithologically-distinct mappable unit. The type section of the Formation can be designatedfrom a traverse in the al-Jawf area, where a thickness of 215.5 m is exposed. The Sakaka Formation conformably overlies the Lower Devonian Jauf Formation, and unconfonnably underlies the Middle Cretaceous Wasia Formation. At depth, in the subsu$ace. the Sakaka Formation underlies conformably the Lower Carboniferous Benvath Formation.Reliable relative age-dating of the Sakaka Formation has contributed to investigations of both the histoy of the Hail Arch, and the economic prospects of the area. This Arch extends throughout the al-Jawf area, and is probably of ReCambrian age; it was rejuvenated in pre-Middle Devonian and pre-Middle Cretaceous times. The Arch separates the Widyan Basin to the east from the Tabuk Basin to the west. The former basin is promising in terms of petroleum exploration owing to its great possible thickness. and the presence of favourable lateral facies changes. and potential source and reservoir rocks; moreoveE tectonic activity has resulted in the generation of many traps, including stratigraphic traps. The Sakaka Formation and the overlying Berwnth Formation could serve as potential reservoir rocks. capped unconformably by .fine, argillaceous rocks of the Upper Carboniferous -Lower F'ermian Unayzah Formation.* "al-Jawf' refers here to both the town of this name, recentb known as Dumat al-Jandal, and the surrounding region. The Jauf Formation takes its namefrom this town, despite the dagerent transliterated spelling.

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“…Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK Palynological investigations of the Paleozoic rocks of Saudi Arabia have developed in parallel with the growing need for detailed understanding of the complexities of subsurface stratigraphy, in order to meet the demands of hydrocarbon exploration activities in the Kingdom. Pioneering work of early palynologists in Saudi Aramco since the 1960s demonstrated the presence of exceptionally abundant and well preserved assemblages of fossil microplankton and spores of primitive vegetation and their huge potential for establishing reliable operational biozonations (e.g., Hemer and Nygreen, 1966). A major impetus for further development and refinement of palynological biozonations followed the important hydrocarbon discoveries from Saudi Arabian Paleozoic successions during the late 1980s and the 1990s, with an increased need for an improved understanding of the Paleozoic sediments, and their geological and paleogeographical relationships to successions in neighboring countries and adjacent plates.…”

Section: New Palynological Investigations In the Paleozoic Of Saudi Amentioning

confidence: 99%

New Palynological Investigations in the Paleozoic of Saudi Arabia and Adjoining Areas (Saudi Aramco – CIMP Joint Project)

Vecoli

Wellman

Al-Hajri

2017

Revue de Micropaléontologie

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Devonian palynology of Saudi Arabia

Cited by 19 publications

References 3 publications

Facies mosaic and diagenetic patterns of the early Devonian (Late Pragian–Early Emsian) microbialite‐dominated carbonate sequences, Qasr Member, Jauf Formation, Saudi Arabia

Facies mosaic and diagenetic patterns of the early Devonian (Late Pragian–Early Emsian) microbialite‐dominated carbonate sequences, Qasr Member, Jauf Formation, Saudi Arabia

Chronostratigraphy and Hydrocarbon Prospects of the Sakaka Formation, Northern Arabia

New Palynological Investigations in the Paleozoic of Saudi Arabia and Adjoining Areas (Saudi Aramco – CIMP Joint Project)

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