Fig. 4: Volcanic signals across Oceanic Anoxic Event 2 (OAE2) and the Mid-Cenomanian Event (MCE).
From: Oceanic Anoxic Event 2 triggered by Kerguelen volcanism
Hg relative to total organic carbon (Hg/TOC), δ13C and osmium (Os) isotope records of OAE2 and the MCE from the Mentelle Basin (proto-Indian Ocean)52, Maverick Basin (Western Interior Seaway)18,22, Tibet6, the Kerguelen Plateau23,42 and Vocontian Trough, south-east France16,23. Hg/TOC values in the Mentelle Basin are an order of magnitude higher than at Northern Hemisphere sites across OAE2, indicating a proximal source of volcanism to southwest Australia. Data from the Kerguelen Plateau are incomplete due to a hiatus during OAE2 onset – precluding direct comparison with the Mentelle Basin, and making a Kerguelen Plateau source of Hg possible, despite generally low Hg/TOC values in the upper portion of the OAE2 record from Ocean Drilling Program (ODP) Site 1138 (Kerguelen Plateau).
