Maastrichtian carbon cycle changes and planktonic foraminiferal bioevents at Gebel Matulla,west-central Sinai,Egypt |
| |
Affiliation: | Exploration Department, Egyptian Petroleum Research Institute, Nasr City 11727, Egypt |
| |
Abstract: | Comparison between the planktonic foraminiferal bioevents from different palaeolatitudes suggests that the biostratigraphic criteria used to identify the Maastrichtian stage boundaries are problematic. A new high-resolution calibration of planktonic foraminiferal biostratigraphic, carbon-isotope, and sequence-stratigraphic criteria has been recorded for the first time from the Maastrichtian Sudr Formation at Gebel Matulla, west-central Sinai. The sedimentary successions allow the identification of prominent long-term carbon isotope events in the Maastrichtian, namely the negative excursion of the Campanian–Maastrichtian Boundary Event (CMBE), the positive excursion of the mid-Maastrichtian Event (MME), and the decline towards the Cretaceous-Palaeogene transition (KPgE). Termination of these well known δ13C events is associated with unconformities, created by eustatic sea-level changes, although the long duration argues for superimposed local tectonic control. |
| |
Keywords: | Campanian-Maastrichtian Planktonic foraminifera Biostratigraphy Carbon-isotope stratigraphy Sudr Formation Gebel Matulla Sinai Egypt |
本文献已被 ScienceDirect 等数据库收录! |
|