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High-resolution deep-sea carbon and oxygen isotope records of Eocene Thermal Maximum 2 and H2

Lucy Stap, Lucas J. Lourens, Ellen Thomas, Appy Sluijs, Steven Bohaty and James C. Zachos
High-resolution deep-sea carbon and oxygen isotope records of Eocene Thermal Maximum 2 and H2
Geology (Boulder) (July 2010) 38 (7): 607-610

Abstract

Eocene Thermal Maximum 2 (ETM2) and H2 were two short-lived global warming events that occurred approximately 2 m.y. after the Paleocene-Eocene thermal maximum (PETM, ca. 56 Ma). We have generated benthic foraminiferal stable carbon and oxygen isotope records of four sites along a depth transect on Walvis Ridge ( approximately 3.5-1.5 km paleodepth, southeast Atlantic Ocean) and one site on Maud Rise (Weddell Sea) to constrain the pattern and magnitude of their carbon isotope excursions (CIEs) and deep-sea warming. At all sites, ETM2 is characterized by approximately 3 degrees C warming and a -1.4 per mil CIE. The H2 event that occurred approximately 100 k.y. later is associated with approximately 2 degrees C warming and a -0.8 per mil CIE. The magnitudes of the delta (super 13) C and delta (super 18) O excursions of both events are significantly smaller than those during the PETM, but their coherent relation indicates that the delta (super 13) C change of the exogenic carbon pool was similarly related to warming during these events, despite the much more gradual and transitioned onset of ETM2 and H2.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 38
Serial Issue: 7
Title: High-resolution deep-sea carbon and oxygen isotope records of Eocene Thermal Maximum 2 and H2
Affiliation: Utrecht University, Faculty of Geosciences, Utrecht, Netherlands
Pages: 607-610
Published: 201007
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 28
Accession Number: 2010-064224
Categories: StratigraphyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2010166
Illustration Description: illus.
S29°00'00" - S27°00'00", E01°30'00" - E03°00'00"
S67°00'00" - S63°30'00", E00°00'00" - E06°00'00"
S40°00'00" - S20°00'00", W10°00'00" - E10°00'00"
Secondary Affiliation: Yale University, USA, United StatesNational Oceanography Centre, GBR, United KingdomUniversity of California, Santa Cruz, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201035
Program Name: ODPOcean Drilling Program
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