Age model and elemental data of DSDP Holes 48-401 and 80-549

DOI

A growing body of geologic evidence suggests that emplacement of the North Atlantic Igneous Province (NAIP) played a major role in global warming during the early Paleogene as well as in the transient Paleocene–Eocene thermal maximum (PETM) event. A ~5 million year record of major and trace element abundances spanning 56 to 51 Ma at Deep Sea Drilling Project Sites 401 and 549 confirms that the majority of NAIP volcanism occurred as subaerial flows. Thus the trace element records provide constraints on the nature and scope of the environmental impact of the NAIP during the late Paleocene–early Eocene interval. Subaerial volcanism would have injected mantle CO2 directly into the atmosphere, resulting in a more immediate increase in atmospheric greenhouse gas abundances than CO2 input through submarine volcanism. The lack of significant hydrothermalism contradicts recently proposed mechanisms for thermally destabilizing methane hydrate reservoirs during the PETM. Any connection between NAIP volcanism and PETM warming had to occur through the atmosphere.

Supplement to: Thomas, Deborah J; Bralower, Timothy J (2005): Sedimentary trace element constraints on the role of North Atlantic Igneous Province volcanism in late Paleocene–early Eocene environmental change. Marine Geology, 217(3-4, 233-254

Identifier
DOI https://doi.org/10.1594/PANGAEA.726358
Related Identifier IsSupplementTo https://doi.org/10.1016/j.margeo.2005.02.009
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.726358
Provenance
Creator Thomas, Deborah J; Bralower, Timothy J (ORCID: 0000-0002-3503-859X)
Publisher PANGAEA
Publication Year 2005
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 4 datasets
Discipline Earth System Research
Spatial Coverage (-13.098W, 47.428S, -8.810E, 49.088N); North Atlantic/TERRACE; North Atlantic/SPUR
Temporal Coverage Begin 1976-06-06T00:00:00Z
Temporal Coverage End 1981-06-15T00:00:00Z