RT Journal Article
T1 New Evidence for an Episode of Accelerated Environmental Change in the Late Barremian: Geochemical and Paleontological Records from the Subbetic Basin (Western Tethys)
A1 Gea Guillén, Ginés Alfonso
A1 Castro Jiménez, Jose Manuel
A1 Company Sempere, Miguel
A1 O’Dogherty, Luis
A1 Sandoval Gabarrón, José
A1 Quijano López, María Luisa
A1 Sequero López, Cristina
A1 Froehner, Sandro
A1 Aguado Merlo, Roque
AB We investigate a new event of accelerated environmental change that was recorded during the late Barremian in the pelagic Subbetic Basin (Western Tethys). Two pelagic sections have been studied using a multi-proxy approach based on C-isotope stratigraphy and a high-resolution quantitative study of nannofossil assemblages, along with major and trace elements and biomarkers. Our results provide a detailed biostratigraphy and C-isotope stratigraphy, and outline the paleoenvironmental conditions recorded during the early stages of the Taxy Episode. A disturbance has been identified in the C-isotope record, called the IFeNE (Intra-Feradianus negative C-excursion), which is coeval with environmental and biotic changes that predate the well-known ISNE (Intra-Sarasini negative C-excursion). The combined analysis of nannofossil associations, C-isotopes, major and trace elements, and biomarker distributions indicates a separate episode of warming heralding the ISNE, resulting in the acceleration of the hydrological cycle and a consequent increase in continental inputs and the fertilization of surface waters. The origin of the Taxy Episode (the IFeNE and ISNE) has been related to orbital factors (high-eccentricity cycles), and to a global increase in volcanism, probably related to the early phases of the Ontong Java Plateau.
PB MDPI
YR 2024
FD 2024-07-11
LK https://hdl.handle.net/20.500.14352/114815
UL https://hdl.handle.net/20.500.14352/114815
LA eng
NO de Gea, G. A., Castro, J. M., Company, M., O’Dogherty, L., Sandoval, J., Quijano, M. L., Sequero, C., Froehner, S., & Aguado, R. (2024). New Evidence for an Episode of Accelerated Environmental Change in the Late Barremian: Geochemical and Paleontological Records from the Subbetic Basin (Western Tethys). Geosciences, 14(7), 187. https://doi.org/10.3390/geosciences14070187
NO Consejería de Transformación Económica, Industria, Conocimento y Universidades
NO Junta de Andalucía
NO Universidad de Jaén
DS Docta Complutense
RD 7 abr 2025