Fig. 4: Numerical simulation results using a simplified Hg isotope box-model.
From: Recurrent photic zone euxinia limited ocean oxygenation and animal evolution during the Ediacaran
Simulated marine Hg enrichment (b) and Δ199Hg (c) in response to an increase in terrestrial weathering Hg flux by 10–50× during E1 (~635 Ma), E2 (~580 Ma), and E3 (~565 Ma), and a further increase in local volcanic Hg emission by 100× during E3 (a). The “enrichment factor_ocean” value is defined as the marine Hg reservoir during E intervals relative to the reservoir size between E intervals.
