Fig. 11 (a1/2–f1/2) In situ pore water profiles of cations in LGM sediments from various water depths. Enhanced cation concentrations in the interstitial water of the steeply inclining sector of the LGM basin indicate high cation release by chemical alteration, which is also implied by the geochemical signatures of sediments from the 8 m site. The highest Fe concentrations are obtained in the pore water from 32 m; formation of authigenic Feminerals is inhibited by enhanced CO2 contents and SO4 depletion in the anoxic deep water of LGM
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