Stable carbon and oxygen isotope records in a Middle Jurassic carbonate sequence: implications for paleoenvironment, and sea-level fluctuation, central Saudi Arabia

Babalola, Lamidi; Alqubalee, Abdullah; Kaminski, Michael A.; Abdullatif, Osman; Abouelresh, Mohamed O.

doi:10.1007/s00531-022-02261-7

Cited by 3 publications

(3 citation statements)

References 118 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These values would indicate a weak diagenetic in uence that would not substantially modify the primary geochemical signal. On the other hand, the values of the Z factor > 120 indicate that the materials studied are of marine origin and, therefore, with little or no in uence of meteoric waters that have altered the primary diagenetic signal (Babalola et al, 2023). The scarce diagenetic effect on these sections is also con rmed by the microfacies where cements and radiolarians, sponge spicules and calcareous nannoplankton is generally preserved.…”

Section: Diagenetic Control In the Primary Geochemical Proxiesmentioning

confidence: 90%

“…To analyze the in uence of diagenesis in the primary geochemistry signal, the Z factor was used, calculated for each studied section according to the expression (2), given by Keith and Weber (1964) and Babalola et al (2023).…”

Section: Elemental and C-o Isotope Geochemistrymentioning

confidence: 99%

“…The value of the Z factor has also been calculated for each of the sections considered, according to the de nition of this factor given by Keith and Weber (1964) and Babalola et al (2023) and shown in the methodological section of the current paper. If Z > 120, the limestones could be classi ed as marine; if Z < 120, they are materials generated in or affected by meteoric waters.…”

Section: Diagenetic Signaturementioning

confidence: 99%

See 2 more Smart Citations

Environmental Conditions in the Pre-jenkyns Event Times (Late Pliensbachian – Early Toarcian) in the Southiberian Palaeomargin (Betic External Zones, Southern Spain)

Nieto,

Ayadi,

Fraguas

et al. 2024

Preprint

View full text Add to dashboard Cite

Three stratigraphic sections of the Betic External Zones have been studied, two from the Median Subbetic (PEL and PR) and one from the External Subbetic (CE). The upper Pliensbachian materials and the transition to the lower Toarcian have been dated with calcareous nannofossils in PEL and PR in this paper, while in the CE section, previous ammonite and nannofossil biostratigraphies have been considered. The dominant facies are alternance of marly limestone - marl, although in the CE section, the Toarcian is represented by marls, where the Jenkyns Event has been recorded. In terms of ichnofossils, in the PEL section Macaronichnus predominates. In the PR and CE sections, the ichnoassemblages are dominated by Planolites, Thalassinoides and Chondrites. Therefore, the facies and ichnofacies observed were generated in pelagic or hemipelagic marine environments. Analysis of the correlation between δ13C and δ18O and of each of them with Sr and Fe/Ca and Sr/Ca, as well as the Z-factor, indicate that the geochemical signal has not been modified by diagenesis. In the PEL and PR sections, the δ13C and δ18O ratios do not allow to clearly identify isotopic events, except in CE where the Jenkyns Event was recorded. The proxies used to study detritism (Zr/Rb, Sr/Cu, CIA and C-value) show trends opposite to those detected in other Tethys sections and even between them. These peculiarities in the geochemical data are interpreted as the result of the opening of the Hispanic Corridor, the mixing of Panthalassa and Tethys seawaters and extensional tectonics, which favoured the development of half grabens with significant differential subsidence, especially during the NJT5b Subzone (latest Pliensbachian). These half grabens could be affected by contourite currents according to the Macaronichnus assemblage in some of these sections.

show abstract

Section: Diagenetic Control In the Primary Geochemical Proxiesmentioning

confidence: 90%

Section: Elemental and C-o Isotope Geochemistrymentioning

confidence: 99%

Section: Diagenetic Signaturementioning

confidence: 99%

See 1 more Smart Citation

Environmental Conditions in the Pre-jenkyns Event Times (Late Pliensbachian – Early Toarcian) in the Southiberian Palaeomargin (Betic External Zones, Southern Spain)

Nieto,

Ayadi,

Fraguas

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Facies associations and stratigraphic sequence of the Dhruma Formation (Middle Jurassic) at its type locality, Khashm adh Dhibi, Saudi Arabia

El-Kahtany,

Farouk,

Ahmad

et al. 2024

Carbonates Evaporites

View full text Add to dashboard Cite

Environmental conditions in the pre-Jenkyns event times (late Pliensbachian—early Toarcian) in the South Iberian Palaeomargin (Betic External Zones, Southern Spain)

Nieto,

Ayadi,

Fraguas

et al. 2024

J Iber Geol

View full text Add to dashboard Cite

Three stratigraphic sections of the Betic External Zones were studied, two from the Median Subbetic (PEL and PR) and one from the External Subbetic (CE). The upper Pliensbachian materials and the transition to the lower Toarcian were dated with calcareous nannofossils in PEL and PR in this paper, while in the CE section, previous ammonite and nannofossil biostratigraphies were considered. The dominant facies are alternance of marly limestone—marl, although in the CE section, the Toarcian is represented by marls, where the Jenkyns Event has been recorded. In terms of ichnofossils, in the PEL section Macaronichnus predominates. In the PR and CE sections, the ichnoassemblages are dominated by Planolites, Thalassinoides and Chondrites. The facies and ichnofacies distinguished formed in pelagic or hemipelagic marine environments. Analysis of the correlation between δ13C and δ18O and of each of them with Sr and Fe/Ca and Sr/Ca, as well as the Z-factor, indicate that the geochemical signal has not been modified by diagenesis. In the PEL and PR sections, the δ13C and δ18O ratios do not allow to clearly identify isotopic events, except in CE where the Jenkyns Event was recorded. The proxies used to study detritism (Zr/Rb, Sr/Cu, Chemical Index Alteration, CIA, and C-value) show trends opposite to those detected in other Tethys sections and even between them. These peculiarities in the geochemical data are interpreted as the result of the opening of the Hispanic Corridor, the mixing of Panthalassa and Tethys seawaters and extensional tectonics, which favoured the development of half grabens with significant differential subsidence, especially during the NJT5b Subzone (latest Pliensbachian). These half grabens could be affected by contourite currents according to the Macaronichnus assemblage in some of these sections.

show abstract

Stable carbon and oxygen isotope records in a Middle Jurassic carbonate sequence: implications for paleoenvironment, and sea-level fluctuation, central Saudi Arabia

Cited by 3 publications

References 118 publications

Environmental Conditions in the Pre-jenkyns Event Times (Late Pliensbachian – Early Toarcian) in the Southiberian Palaeomargin (Betic External Zones, Southern Spain)

Environmental Conditions in the Pre-jenkyns Event Times (Late Pliensbachian – Early Toarcian) in the Southiberian Palaeomargin (Betic External Zones, Southern Spain)

Facies associations and stratigraphic sequence of the Dhruma Formation (Middle Jurassic) at its type locality, Khashm adh Dhibi, Saudi Arabia

Environmental conditions in the pre-Jenkyns event times (late Pliensbachian—early Toarcian) in the South Iberian Palaeomargin (Betic External Zones, Southern Spain)

Contact Info

Product

Resources

About