Articles | Volume 11, issue 23
Biogeosciences, 11, 7077–7095, 2014
Biogeosciences, 11, 7077–7095, 2014

Research article 12 Dec 2014

Research article | 12 Dec 2014

I/Ca ratios in benthic foraminifera from the Peruvian oxygen minimum zone: analytical methodology and evaluation as a proxy for redox conditions

N. Glock et al.

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Cited articles

Anand, P. and Elderfield, H.: Variability of Mg / Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides, Geochem. Geophys. Geosyst., 6, Q11D15,, 2005.
Baturin, G. N.: Some unique sedimentological and geochemical features of deposits in coastal upwelling regions, in: Coastal upwelling – its sediment record, Part B: Sedimentary records of ancient coastal upwelling, edited by: Suess, E. and Thiede, J., Plenum Press, NY, 11–27, 1983.
Bernhard, J. M.: Characteristic assemblages and morphologies of benthic foraminifera from, anoxic, organic-rich deposits: Jurassic through Holocene, J. Foramin. Res., 16, 207–215, 1986.
Bernhard, J. M. and Sen Gupta, B. K.: Foraminifera of oxygen-depleted environments, in: Modern Foraminifera, edited by: Sen Gupta, B. K., Kluwer Academic Press, 201–216, 1999.
Bogus, K. A., Zonnefeld, K. A. F., Fischer, D., Kasten, S., Bohrmann, G., and Versteegh, G. J. M.: The effect of meter-scale lateral oxygen gradients at the sediment-water interface on selected organic matter based alteration, productivity and temperature proxies, Biogeosciences, 9, 1553–1570,, 2012.
Short summary
Our study explores the correlation of I/Ca ratios in four benthic foraminiferal species (three calcitic, one aragonitic) from the Peruvian OMZ with bottom water oxygenation ([O2]BW), and evaluates foraminiferal I/Ca ratios as a possible redox proxy. All species have a positive trend in the I/Ca ratios as a function of [O2]BW. Only for the aragonitic species Hoeglundina elegans is this trend not significant. The highest significance has been found for Uvigerina striata.
Final-revised paper