Coniacian-maastrichtian calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy in the Zagros Basin (Iran): consequences for the correlation of late cretaceous stage boundaries between the Tethyan and Boreal realms

Mohammad Javad Razmjooei; Nicolas Thibault; Anoshiravan Kani; Azam Mahanipour; Myriam Boussaha; Christoph Korte

doi:10.1127/0078-0421/2014/0045

Coniacian-maastrichtian calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy in the Zagros Basin (Iran): consequences for the correlation of late cretaceous stage boundaries between the Tethyan and Boreal realms

Mohammad Javad Razmjooei, Nicolas Thibault^*, Anoshiravan Kani, Azam Mahanipour, Myriam Boussaha, Christoph Korte

^*Corresponding author for this work

Geology

19 Citations (Scopus)

Abstract

Calcareous nannofossil biostratigraphy and stable isotope stratigraphy have been investigated in the Shahneshin section of the Gurpi Formation from the Zagros Basin (Iran). The results show that the Gurpi Formation spans the late early Coniacian to late Thanetian. The age-model shows that the Shahneshin section spans the Coniacian to mid-Campanian with a good continuity whereas condensation is highlighted in the late Campanian, across the Campanian/Maastrichtian boundary and in the late Maastrichtian. Extreme condensation is recorded after the Cretaceous-Paleogene boundary with the complete absence of the Danian, and the Selandian and lower Thanetian being comprised in only 6 m at the top of the Gurpi Formation. Correlation of the carbon-isotope profile with other reference curves allows the recognition of several Late Cretaceous excursions at the Shahneshin section such as the Beeding, White Fall, Kingsdown, Michel Dean, Haven Brow, Horseshoe Bay, Buckle, Hawks Brow, Santonian/Campanian boundary (SCBE) and Campanian/Maastrichtian boundary (CMBE) events. Correlation to a recently proposed global δ¹³C stack for the Late Cretaceous points to a major mismatch of this compilation with magnetostratigraphy in the Santonian-early Campanian interval. The δ¹³C correlation, supported by calcareous nannofossil biostratigraphy, brings insights into: (1) the position of the Coniacian/Santonian, Santonian/Campanian and Campanian/Maastrichtian boundaries with respect to carbon-isotope stratigraphy and calcareous nannofossil bio-horizons, and (2) their correlation between the Tethyan and Boreal realms.

Original language	English
Journal	Newsletters on Stratigraphy
Volume	47
Issue number	2
Pages (from-to)	183-209
Number of pages	27
ISSN	0078-0421
DOIs	https://doi.org/10.1127/0078-0421/2014/0045
Publication status	Published - 2014

Keywords

Calcareous nannofossil biostratigraphy
Carbon-isotope stratigraphy
Late cretaceous
Zagros

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Razmjooei, M. J., Thibault, N., Kani, A., Mahanipour, A., Boussaha, M., & Korte, C. (2014). Coniacian-maastrichtian calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy in the Zagros Basin (Iran): consequences for the correlation of late cretaceous stage boundaries between the Tethyan and Boreal realms. Newsletters on Stratigraphy, 47(2), 183-209. https://doi.org/10.1127/0078-0421/2014/0045

Coniacian-maastrichtian calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy in the Zagros Basin (Iran): consequences for the correlation of late cretaceous stage boundaries between the Tethyan and Boreal realms. / Razmjooei, Mohammad Javad; Thibault, Nicolas; Kani, Anoshiravan et al.
In: Newsletters on Stratigraphy, Vol. 47, No. 2, 2014, p. 183-209.

Research output: Contribution to journal › Journal article › Research › peer-review

Razmjooei, MJ, Thibault, N, Kani, A, Mahanipour, A, Boussaha, M & Korte, C 2014, 'Coniacian-maastrichtian calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy in the Zagros Basin (Iran): consequences for the correlation of late cretaceous stage boundaries between the Tethyan and Boreal realms', Newsletters on Stratigraphy, vol. 47, no. 2, pp. 183-209. https://doi.org/10.1127/0078-0421/2014/0045

Razmjooei MJ, Thibault N, Kani A, Mahanipour A, Boussaha M, Korte C. Coniacian-maastrichtian calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy in the Zagros Basin (Iran): consequences for the correlation of late cretaceous stage boundaries between the Tethyan and Boreal realms. Newsletters on Stratigraphy. 2014;47(2):183-209. doi: 10.1127/0078-0421/2014/0045

Razmjooei, Mohammad Javad ; Thibault, Nicolas ; Kani, Anoshiravan et al. / Coniacian-maastrichtian calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy in the Zagros Basin (Iran) : consequences for the correlation of late cretaceous stage boundaries between the Tethyan and Boreal realms. In: Newsletters on Stratigraphy. 2014 ; Vol. 47, No. 2. pp. 183-209.

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