Stable isotope evidence for meter-scale sea level changes in Lower Cretaceous inner platform and pelagic carbonate successions of Turkey

Détails

ID Serval
serval:BIB_4A9E9ED15C77
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Stable isotope evidence for meter-scale sea level changes in Lower Cretaceous inner platform and pelagic carbonate successions of Turkey
Périodique
Geologica Carpathica
Auteur(s)
Yilmaz I.O., Vennemann T.W., Altiner D., Satir M.
ISSN-L
1335-0552
Statut éditorial
Publié
Date de publication
2004
Peer-reviewed
Oui
Volume
55
Pages
19-36
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.
Création de la notice
29/09/2012 16:23
Dernière modification de la notice
20/08/2019 13:58
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