I would like to stack different deep sea curves. Different genera were used to generate the curve, so I need to correct the data to the Cibicidoides standard. I have found different correction factors and I don't know which one to use. I am a terrestrial geochemist, so I do not know what is the latest standards used. I would be grateful if someone usually working with deep sea sediments could indicate me the latest used references for these standards.
Actually, most researchers working with oxygen isotopes in different genera of benthic foraminifera use the so-called 'uvigerina' scale, so all genera are corrected to the uvigerina values. For carbon there are more discrepancies as uvigerina is an infaunal species and the measured carbon deviates from bottom seawater values. You can check this reference for a comprehensive comparison:
Shackleton, N. J., & Hall, M. A. (1997). The Late Miocene Stable Isotope Record, Site 926. Proceedings of the Ocean Drilling Program, Scientific Results, 154, 367–373.
Hope this helps.
This is much clearer to me now. Thank you very much.
For those interested, here is the link to the paper Leopoldo D. Pena refered to: http://www-odp.tamu.edu/publications/154_SR/24_CHAP.PDF
If all standard methods used by others fail, use the rule of thumb. I would simply go back to the original database, find samples with both genera measured, and make my own corrections for the rest of the samples.
I wonder if I am stating the obvious, and if this is of any help :-)
For oxygen isotope, you may want to read also this more recent paper:
T.M. Marchitto, W.B. Curry, J. Lynch-Stieglitz, S.P. Bryan, K.M. Cobb, D.C. Lund. (2014). Improved oxygen isotope temperature calibrations for cosmopolitan benthic foraminifera. Geochimica et Cosmochimica Acta 130 (2014) 1–11.
Dear Katalin Baldi,
no, you are not stating the obvious, I am not a marine geochemist, but a terrestrial one, so the methods I use are quite different. I thought I would have to do what you suggested, but I wanted to make sure that I am understanding things correctly. I will have to compile about 40 sites from different ages (so I need to correctly calibrate for time as well, as some of the sites are still in CK95 time), it would be a shame to ruin my work by making mistakes by using wrong correcting factors between different taxa of foraminifera.
To Elena Lo Giudice Cappelli:
Thank you so much for bringing my attention to this very recent reference, it will be very valuable. For those interested, here is the link to download the pdf:
http://www.sciencedirect.com/science/article/pii/S0016703714000179
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