Integrated record of the Late Lutetian Thermal Maximum at IODP site U1508, Tasman Sea: The deep-sea response

Irene Peñalver-Clavel; Claudia Agnini; Thomas Westerhold; Marlow J. Cramwinckel; Edoardo Dallanave; Joyeeta Bhattacharya; Rupert Sutherland; Laia Alegret

doi:10.1016/j.marmicro.2024.102390

Integrated record of the Late Lutetian Thermal Maximum at IODP site U1508, Tasman Sea: The deep-sea response

Irene Peñalver-Clavel^*
, Claudia Agnini
, Thomas Westerhold
, Marlow J. Cramwinckel
, Edoardo Dallanave
, Joyeeta Bhattacharya
, Rupert Sutherland
, Laia Alegret

^*Corresponding author for this work

University of Zaragoza
University of Padova
University of Bremen
University of Bremen
University of Milan
Picarro Inc.
Victoria University of Wellington

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The Late Lutetian Thermal Maximum (LLTM) was a transient and brief global warming event recorded in the middle Eocene, at 41.52 Ma. The biotic response to the LLTM has been documented at only a few marine sites so far. Here, we present the first record of deep-sea benthic foraminiferal assemblage changes during the LLTM in the southwest Pacific at International Ocean Discovery Program Hole U1508C (1609 m water depth) in the Tasman Sea. The LLTM coincides with a negative excursion in bulk sediment δ¹³C (0.47‰) and benthic foraminifera δ¹³C (0.36‰), with changes in the relative abundance of benthic foraminiferal species and in the deep-water organic geochemistry. The decrease in diversity of the assemblages indicates environmental stress during the event, potentially linked to oxygen deficiency, as evidenced by the occurrence of dysoxic taxa (e.g. Lenticulina spp., Turrillina brevispira). Although calcareous taxa dominate, the presence of corrosion-resistant species and poorly preserved foraminiferal tests suggest slightly CaCO₃-corrosive bottom waters, but no dissolution was evident. We suggest the shallowing of the thermocline and enhanced water column stratification at this site during the LLTM.

Original language	English
Article number	102390
Number of pages	19
Journal	Marine Micropaleontology
Volume	191
DOIs	https://doi.org/10.1016/j.marmicro.2024.102390
Publication status	Published - Aug 2024

Bibliographical note

Publisher Copyright:
© 2024 The Authors

Funding

Project PID2019-105537RB-I00, funded by MCIN/AEI/10.13039/501100011033 and by \u201CERDF A way of making Europe.\u201D IP was supported by the Spanish Ministry of Science and Innovation (MCIN) (FPI grant PRE2020-092638). Additional funding was provided by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy \u2013 EXC-2077\u2013390741603 to TW, by DFG grants 408178503 and 465492305 to ED, and by PRIN20222 project cod. MUR 2022T4XEBP and RETURN Extended Partnership, financed by the National Recovery and Resilience Plan \u2013 NRRP, Mission 4, Component 2, Investment 1.3 \u2013 D.D. 1243 2/8/2022, PE0000005 to CA. We acknowledge the use of Servicio General de Apoyo a la Investigaci\u00F3n-SAI, Universidad de Zaragoza. This research used samples and data provided by the International Ocean Discovery Program (IODP).

Funders	Funder number
Universidad de Zaragoza
International Ocean Discovery Program
European Regional Development Fund
NRRP	PE0000005, 1243 2/8/2022
Deutsche Forschungsgemeinschaft	408178503, 465492305, EXC-2077–390741603, MUR 2022T4XEBP
Ministerio de Ciencia e Innovación	PRE2020-092638

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 14 Life Below Water

Keywords

Benthic foraminifera
C19r event
Eocene
Geochemistry
Hyperthermal
SW Pacific

Access to Document

10.1016/j.marmicro.2024.102390Licence: CC BY

1-s2.0-S0377839824000604-mainFinal published version, 17.7 MBLicence: CC BY

Cite this

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title = "Integrated record of the Late Lutetian Thermal Maximum at IODP site U1508, Tasman Sea: The deep-sea response",

abstract = "The Late Lutetian Thermal Maximum (LLTM) was a transient and brief global warming event recorded in the middle Eocene, at 41.52 Ma. The biotic response to the LLTM has been documented at only a few marine sites so far. Here, we present the first record of deep-sea benthic foraminiferal assemblage changes during the LLTM in the southwest Pacific at International Ocean Discovery Program Hole U1508C (1609 m water depth) in the Tasman Sea. The LLTM coincides with a negative excursion in bulk sediment δ13C (0.47‰) and benthic foraminifera δ13C (0.36‰), with changes in the relative abundance of benthic foraminiferal species and in the deep-water organic geochemistry. The decrease in diversity of the assemblages indicates environmental stress during the event, potentially linked to oxygen deficiency, as evidenced by the occurrence of dysoxic taxa (e.g. Lenticulina spp., Turrillina brevispira). Although calcareous taxa dominate, the presence of corrosion-resistant species and poorly preserved foraminiferal tests suggest slightly CaCO3-corrosive bottom waters, but no dissolution was evident. We suggest the shallowing of the thermocline and enhanced water column stratification at this site during the LLTM.",

keywords = "Benthic foraminifera, C19r event, Eocene, Geochemistry, Hyperthermal, SW Pacific",

author = "Irene Pe{\~n}alver-Clavel and Claudia Agnini and Thomas Westerhold and Cramwinckel, \{Marlow J.\} and Edoardo Dallanave and Joyeeta Bhattacharya and Rupert Sutherland and Laia Alegret",

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year = "2024",

month = aug,

doi = "10.1016/j.marmicro.2024.102390",

language = "English",

volume = "191",

journal = "Marine Micropaleontology",

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T1 - Integrated record of the Late Lutetian Thermal Maximum at IODP site U1508, Tasman Sea

T2 - The deep-sea response

AU - Peñalver-Clavel, Irene

AU - Agnini, Claudia

AU - Westerhold, Thomas

AU - Cramwinckel, Marlow J.

AU - Dallanave, Edoardo

AU - Bhattacharya, Joyeeta

AU - Sutherland, Rupert

AU - Alegret, Laia

PY - 2024/8

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N2 - The Late Lutetian Thermal Maximum (LLTM) was a transient and brief global warming event recorded in the middle Eocene, at 41.52 Ma. The biotic response to the LLTM has been documented at only a few marine sites so far. Here, we present the first record of deep-sea benthic foraminiferal assemblage changes during the LLTM in the southwest Pacific at International Ocean Discovery Program Hole U1508C (1609 m water depth) in the Tasman Sea. The LLTM coincides with a negative excursion in bulk sediment δ13C (0.47‰) and benthic foraminifera δ13C (0.36‰), with changes in the relative abundance of benthic foraminiferal species and in the deep-water organic geochemistry. The decrease in diversity of the assemblages indicates environmental stress during the event, potentially linked to oxygen deficiency, as evidenced by the occurrence of dysoxic taxa (e.g. Lenticulina spp., Turrillina brevispira). Although calcareous taxa dominate, the presence of corrosion-resistant species and poorly preserved foraminiferal tests suggest slightly CaCO3-corrosive bottom waters, but no dissolution was evident. We suggest the shallowing of the thermocline and enhanced water column stratification at this site during the LLTM.

AB - The Late Lutetian Thermal Maximum (LLTM) was a transient and brief global warming event recorded in the middle Eocene, at 41.52 Ma. The biotic response to the LLTM has been documented at only a few marine sites so far. Here, we present the first record of deep-sea benthic foraminiferal assemblage changes during the LLTM in the southwest Pacific at International Ocean Discovery Program Hole U1508C (1609 m water depth) in the Tasman Sea. The LLTM coincides with a negative excursion in bulk sediment δ13C (0.47‰) and benthic foraminifera δ13C (0.36‰), with changes in the relative abundance of benthic foraminiferal species and in the deep-water organic geochemistry. The decrease in diversity of the assemblages indicates environmental stress during the event, potentially linked to oxygen deficiency, as evidenced by the occurrence of dysoxic taxa (e.g. Lenticulina spp., Turrillina brevispira). Although calcareous taxa dominate, the presence of corrosion-resistant species and poorly preserved foraminiferal tests suggest slightly CaCO3-corrosive bottom waters, but no dissolution was evident. We suggest the shallowing of the thermocline and enhanced water column stratification at this site during the LLTM.

KW - Benthic foraminifera

KW - C19r event

KW - Eocene

KW - Geochemistry

KW - Hyperthermal

KW - SW Pacific

UR - https://www.scopus.com/pages/publications/85201772714

U2 - 10.1016/j.marmicro.2024.102390

DO - 10.1016/j.marmicro.2024.102390

M3 - Article

AN - SCOPUS:85201772714

SN - 0377-8398

VL - 191

JO - Marine Micropaleontology

JF - Marine Micropaleontology

M1 - 102390

ER -

Integrated record of the Late Lutetian Thermal Maximum at IODP site U1508, Tasman Sea: The deep-sea response

Abstract

Bibliographical note

Funding

UN SDGs

Keywords

Access to Document

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