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

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...

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Bibliographic Details
Main Authors: Thomas, Deborah J, Bralower, Timothy J
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
48-401
80-549
Deep Sea Drilling Project
DRILL
Drilling/drill rig
DSDP
Glomar Challenger
Leg48
Leg80
North Atlantic/SPUR
North Atlantic/TERRACE
Methane hydrate
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.726358
https://doi.org/10.1594/PANGAEA.726358
Description
Summary: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.

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