Oceanic Anoxic Event 2 triggered by Kerguelen Plateau volcanism - datasets ...

Large Igneous Provinces (LIPs) are associated with global warming and carbon cycle perturbations during Oceanic Anoxic Event 2 (OAE2, ~94 Ma) and the Mid-Cenomanian Event (MCE, ~96.5 Ma). However, there is still no consensus on the role volcanism played as a trigger, or its source – previously ascri...

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Bibliographic Details
Main Author: Walker-Trivett, Chloe
Format: Dataset
Language:unknown
Published: figshare 2024
Subjects:
Isotope geochemistry
Geochemistry not elsewhere classified
Palaeontology incl. palynology
Stratigraphy incl. biostratigraphy, sequence stratigraphy and basin analysis
Sedimentology
Oceanography not elsewhere classified
Inorganic geochemistry
Arctic
Kerguelen
Global warming
Online Access:https://dx.doi.org/10.6084/m9.figshare.25106123
https://figshare.com/articles/dataset/Oceanic_Anoxic_Event_2_triggered_by_Kerguelen_Plateau_volcanism_-_datasets/25106123
Description
Summary:Large Igneous Provinces (LIPs) are associated with global warming and carbon cycle perturbations during Oceanic Anoxic Event 2 (OAE2, ~94 Ma) and the Mid-Cenomanian Event (MCE, ~96.5 Ma). However, there is still no consensus on the role volcanism played as a trigger, or its source – previously ascribed to the Caribbean LIP or High Arctic LIP. Here, we use Mentelle Basin sedimentary mercury (Hg) concentrations to determine the timing of volcanism, and neodymium (Nd) and strontium (Sr) isotopes for sedimentary provenance. High Hg concentrations compared to Northern Hemisphere records, and a shift to radiogenic Nd isotopes, indicates Kerguelen volcanic activity and plateau uplift occurred in the lead up to and within OAE2. Whilst we find limited evidence that a volcanic event caused the MCE, pulsed Hg spikes before and during OAE2 imply volcanic emissions were key in driving climate and carbon cycle changes and triggering OAE2. The data here are from the following paper: Oceanic Anoxic Event 2 triggered by ...

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