000165755 001__ 165755
000165755 005__ 20260113234335.0
000165755 0247_ $$2doi$$a10.5194/jm-44-713-2025
000165755 0248_ $$2sideral$$a147325
000165755 037__ $$aART-2025-147325
000165755 041__ $$aeng
000165755 100__ $$aPeñalver-Clavel, Irene$$uUniversidad de Zaragoza
000165755 245__ $$aDeep-sea benthic foraminiferal response to the Late Lutetian Thermal Maximum at Demerara Rise (ODP Site 1260, equatorial western Atlantic)
000165755 260__ $$c2025
000165755 5060_ $$aAccess copy available to the general public$$fUnrestricted
000165755 5203_ $$aThe Late Lutetian Thermal Maximum (LLTM) was a short-lived warming event recorded in the middle Eocene, at ∼ 41.52 Ma. It has been linked to the highest insolation values of the last 45 million years on Earth's surface. In order to understand the effects of the LLTM warming in deep-sea ecosystems, the benthic foraminiferal response to the LLTM is documented at Ocean Drilling Program (ODP) Site 1260 in Demerara Rise, equatorial western Atlantic. Previous studies at this site reveal the LLTM is defined by a negative excursion in carbon and oxygen stable isotopes, minimal %CaCO3, elevated X-ray fluorescence (XRF) Fe, and a dark clay-rich layer, indicating CaCO3 dissolution. Our analyses reveal changes in the benthic foraminiferal assemblages and in the sediment components across the LLTM. Carbonate dissolution during the LLTM is supported by the decrease in planktic foraminifera, an increase in siliceous components and in the number of fish teeth, poor preservation of the benthic foraminiferal tests, and increased relative abundance of CaCO3 corrosion-resistant taxa (e.g. Nuttallides truempyi, Oridorsalis umbonatus). The lowest benthic foraminiferal accumulation rates and diversity of the assemblages during the peak LLTM warming may be indicative of lower export productivity and environmental stress; alternatively, they may result from a taphonomic bias due to CaCO3 dissolution. The comparison of these results with the available benthic foraminiferal studies in the Atlantic and Pacific oceans leads to the conclusion that the environmental response to the LLTM was strongly influenced by the palaeogeographic and palaeoceanographic setting.
000165755 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E33-23R$$9info:eu-repo/grantAgreement/ES/MICINN PID2023-149894OB-I00/AEI/10.13039/501100011033$$9info:eu-repo/grantAgreement/ES/MICINN PRE2020-092638
000165755 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000165755 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000165755 700__ $$aWesterhold, Thomas
000165755 700__ $$0(orcid)0000-0002-8801-9544$$aAlegret, Laia$$uUniversidad de Zaragoza
000165755 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000165755 773__ $$g44, 2 (2025), 713-731$$tJournal of Micropalaeontology$$x2041-4978
000165755 8564_ $$s5314398$$uhttps://zaguan.unizar.es/record/165755/files/texto_completo.pdf$$yVersión publicada
000165755 8564_ $$s2734782$$uhttps://zaguan.unizar.es/record/165755/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000165755 909CO $$ooai:zaguan.unizar.es:165755$$particulos$$pdriver
000165755 951__ $$a2026-01-13-22:07:39
000165755 980__ $$aARTICLE