Palaeoenvironmental and climatic changes during the Palaeocene–Eocene Thermal Maximum (PETM) at the Wadi Nukhul Section, Sinai, Egypt

Khozyem, Hassan; Adatte, Thierry; Spangenberg, Jorge E.; Tantawy, Abdel Aziz; Keller, Gerta

doi:10.1144/jgs2012-046

Cited by 52 publications

(38 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The P-E boundary is placed in the present study and other previous studies (Bolle et al, 2000;Speijer and Wagner, 2002;Khozyem et al, 2013) at the base of a dark gray clay layer that defines the contact between the Hanadi and Dababiya Quarry members. The onset of organic-rich Ouda and Aubry, 2003;Aubry et al, 2007).…”

Section: P-e Calcareous Nannofossil Record In West Central Sinaimentioning

confidence: 86%

“…Aubry and Salem (2013) introduced a comprehensive review of the previous studies and the depositional history of the P-E boundary in Egypt. In West Central Sinai, most studies displayed discrepancies and mismatching; some defined a continuous sedimentation with complete bioevents across the P-E boundary and others recorded gaps and incomplete records (Speijer and Wagner, 2002;Khozyem et al, 2013). The present study introduces high-resolution calcareous nannofossil biostratigraphy for the P-E boundary interval in West Central Sinai, highlighting the main bioevents that are commonly used to delineate the P-E boundary.…”

Section: Introductionmentioning

confidence: 83%

“…The cooccurrence of T. bramlettei with RD taxa and C. dela suggested the lack of the NP9b subzone, and therefore the NP10 zone rests unconformably above the NP9a subzone. In the earlier studies in West Central Sinai, sporadic and discontinuous occurrence of C. dela that characterizes shallow water was recognized from the NP9b subzone at G. Matulla and W. Nukhul (Abu Faris and Salem, 2007;Khozyem et al, 2013). Mandur and Bayoumi (2010), on the other hand, recorded C. dela from the upper part of the NP10 zone at G. Qabeliat, West Central Sinai.…”

Section: P-e Calcareous Nannofossil Record In West Central Sinaimentioning

confidence: 92%

“…These species were not recorded in the study of Mandur and Bayoumi (2010). In the sediments of W. Nukhul, Khozyem et al (2013) identified T. pertusus in the NP9a subzone with rare to frequent relative abundance. The relative abundance of T. eminens changed from common in the NP9a subzone to sporadically rare in the NP9b subzone and abruptly increased to common in the NP10 zone.…”

Section: Paleoecologymentioning

confidence: 96%

“…The identified calcareous nannofossils enabled the identification of two biozones, the Discoaster multiradiatus (NP9) and the Tribrachiatus bramlettei (NP10), following the standard zonal scheme of Martini (1971 Khozyem et al, 2013).…”

Section: Biostratigraphymentioning

confidence: 99%

See 4 more Smart Citations

Calcareous nannoplankton changes during the Paleocene-Eocene Thermal Maximum in West Central Sinai, Egypt

Faris¹,

Ghandour²,

Zahran³

et al. 2015

Turkish J Earth Sci

View full text Add to dashboard Cite

The Upper Paleocene-Lower Eocene Hanadi and Dababiya Quarry members in West Central Sinai, Egypt, contain nannofossil taxa assigned to the NP9 and NP10 zones. The Hanadi Member displays lateral variation in thickness and is sharply overlain by a dark gray clay layer that defines the base of the Dababiya Quarry Member. The strata immediately overlying this layer contain nannofossil species assigned to the earliest Eocene. The lateral variation in thickness of the Hanadi Member and the abrupt lithological changes between the Hanadi and the Dababiya members probably suggest active syndepositional tectonism and possibly discontinuous sedimentation. The onset of the Eocene brought oceanic anoxic to dysoxic bottom water conditions as revealed by the dark gray and probably organic rich clay and the common occurrence of Chondrites trace fossils. The earliest Eocene calcareous nannofossil NP9b subzone is missing in the area of study and therefore the incoming of the Eocene is placed at the base of the NP10 zone at the first occurrences of Tribrachiatus bramlettei. The dominant nannofossil taxa around this boundary (Rhomboaster intermedia, R. bitrifida, and R. calcitrapa) in addition to Ericsonia subpertusa are interpreted as proxies for warm surface water. The abundance and diversity of Fasciculithus spp. decreased abruptly in the uppermost part of the NP9a subzone and they became fully extinct shortly above the Paleocene/Eocene interval (base of NP10 zone).

show abstract

Section: P-e Calcareous Nannofossil Record In West Central Sinaimentioning

confidence: 86%

Section: Introductionmentioning

confidence: 83%

Section: P-e Calcareous Nannofossil Record In West Central Sinaimentioning

confidence: 92%

Section: Paleoecologymentioning

confidence: 96%

Section: Biostratigraphymentioning

confidence: 99%

See 3 more Smart Citations

Calcareous nannoplankton changes during the Paleocene-Eocene Thermal Maximum in West Central Sinai, Egypt

Faris¹,

Ghandour²,

Zahran³

et al. 2015

Turkish J Earth Sci

View full text Add to dashboard Cite

show abstract

The spread of marine anoxia on the northern Tethys margin during the Paleocene-Eocene Thermal Maximum

et al. 2014

View full text Add to dashboard Cite

Records of the paleoenvironmental changes that occurred during the Paleocene-Eocene Thermal Maximum (PETM) are preserved in sedimentary rocks along the margins of the former Tethys Ocean and Peri-Tethys. This paper presents new geochemical data that constrain paleoproductivity, sediment delivery, and seawater redox conditions, from three sites that were located in the Peri-Tethys region. Trace and major element, iron speciation, and biomarker data indicate that water column anoxia was established during episodes when inputs of land-derived higher plant organic carbon and highly weathered detrital clays and silts became relatively higher. Anoxic conditions are likely to have been initially caused by two primary processes: (i) oxygen consumption by high rates of marine productivity, initially stimulated by the rapid delivery of terrestrially derived organic matter and nutrients, and (ii) phosphorus regeneration from seafloor sediments. The role of the latter process requires further investigation before its influence on the spread of deoxygenated seawater during the PETM can be properly discerned. Other oxygen-forcing processes, such as temperature/salinity-driven water column stratification and/or methane oxidation, are considered to have been relatively less important in the study region. Organic carbon enrichments occur only during the initial stages of the PETM as defined by the negative carbon isotope excursions at each site. The lack of observed terminal stage organic carbon enrichment does not support a link between PETM climate recovery and the sequestration of excess atmospheric CO 2 as organic carbon in this region; such a feedback may, however, have been important in the early stages of the PETM.

show abstract

Biostratigraphy and depositional environments of thePalaeocene–Eocenesuccession at Um El Huwaitat area, Eastern Desert, Egypt

Anan

Shahin

2020

Geological Journal

View full text Add to dashboard Cite

The Palaeocene-Eocene succession in southwest Safaga, Eastern Desert, Egypt has been studied to determine its lithostratigraphic units, biostratigraphic zonation, microfacies association, and depositional environments. The variation in lithofacies allows the subdivision of the Danian-Ypresian interval into four lithostratigraphic units that are arranged, from base to top, as the Dakhla Shale (only its upper part), Tarawan Chalk, Esna Shale, and Thebes Formation (only its lower part). Moreover, the Esna Shale is further subdivided into four members, arranged from base to top, as El Hanadi, Dababiya Quarry, El Mahmiya, and Abu Had. The depositional setting is interpreted to primarily reflect the relative sea-level changes. The planktonic/benthic (P/B) foraminiferal ratio is indicative of oscillations of depositional settings in normal open marine conditions, ranging from shallow inner to outer neritic environments. Biostratigraphically, the Palaeocene-Eocene succession in the studied area is subdivided into 12 biozones and subbiozones. These are correlated with the standard biozonation of the Palaeocene-Eocene. Deposition of the Palaeocene-Eocene succession in the studied area took place on a relatively stable shelf. Three lithofacies were recognized: shale, marl, and limestone. The shale lithofacies is differentiated into two sub-lithofacies; pure shale and calcareous foraminiferal shale, whereas marl lithofacies contains abundant planktonic foraminifera. The encountered carbonate rocks comprise eight microfacies types. In addition, the studied interval is correlated with the Global Standard Stratotype Section and Point in the Dababiya section, south of Luxor, Egypt.

show abstract

Palaeoenvironmental and climatic changes during the Palaeocene–Eocene Thermal Maximum (PETM) at the Wadi Nukhul Section, Sinai, Egypt

Cited by 52 publications

References 65 publications

Calcareous nannoplankton changes during the Paleocene-Eocene Thermal Maximum in West Central Sinai, Egypt

Calcareous nannoplankton changes during the Paleocene-Eocene Thermal Maximum in West Central Sinai, Egypt

The spread of marine anoxia on the northern Tethys margin during the Paleocene-Eocene Thermal Maximum

Biostratigraphy and depositional environments of thePalaeocene–Eocenesuccession at Um El Huwaitat area, Eastern Desert, Egypt

Contact Info

Product

Resources

About