Titre
Stable isotope evidence for meter-scale sea level changes in Lower Cretaceous inner platform and pelagic carbonate successions of Turkey
Type
article
Institution
Externe
Périodique
Auteur(s)
Yilmaz, I.O.
Auteure/Auteur
Vennemann, T.W.
Auteure/Auteur
Altiner, D.
Auteure/Auteur
Satir, M.
Auteure/Auteur
Liens vers les personnes
ISSN
1335-0552
Statut éditorial
Publié
Date de publication
2004
Volume
55
Première page
19
Dernière page/numéro d’article
36
Peer-reviewed
Oui
Langue
anglais
Résumé
In this study, stable C and O isotope compositions of bulk rock samples
from Barremian-Aptian platform carbonates of the Taurides, the Pontides,
and of their pelagic counterparts of the Sakarya continent in Turkey
were measured for the first time. Platform carbonates and pelagic
successions including a prominent black shale interval are composed of
distinct sedimentary cycles in the form of meter-scale shallowing-upward
sequences and limestone-marl/ shale couplets, respectively. The
biostratigraphy and the delta(13)C values allow this black shale
interval to be correlated with the ``Selli level''. Variations in
lithofacies and delta(13)C and delta(18)O values with the magnitudes of
about 2parts per thousand within the cycles indicate high frequency
fluctuations in sea level, probably in response to alternate periods of
cooling and warming occurring on Milankovitch-cycle scales even during
the greenhouse-type Cretaceous. A good overall correlation between
sedimentary cyclicity and variations in delta(18)O values suggests
preservation of the primary isotopic signal.
from Barremian-Aptian platform carbonates of the Taurides, the Pontides,
and of their pelagic counterparts of the Sakarya continent in Turkey
were measured for the first time. Platform carbonates and pelagic
successions including a prominent black shale interval are composed of
distinct sedimentary cycles in the form of meter-scale shallowing-upward
sequences and limestone-marl/ shale couplets, respectively. The
biostratigraphy and the delta(13)C values allow this black shale
interval to be correlated with the ``Selli level''. Variations in
lithofacies and delta(13)C and delta(18)O values with the magnitudes of
about 2parts per thousand within the cycles indicate high frequency
fluctuations in sea level, probably in response to alternate periods of
cooling and warming occurring on Milankovitch-cycle scales even during
the greenhouse-type Cretaceous. A good overall correlation between
sedimentary cyclicity and variations in delta(18)O values suggests
preservation of the primary isotopic signal.
PID Serval
serval:BIB_4A9E9ED15C77
Date de création
2012-09-29T15:23:07.435Z
Date de création dans IRIS
2025-05-20T16:04:06Z