Calcium isotope record of Phanerozoic oceans: Implications for chemical evolution of seawater and its causative mechanisms

@inproceedings{Farka2007CalciumIR,
  title={Calcium isotope record of Phanerozoic oceans: Implications for chemical evolution of seawater and its causative mechanisms},
  author={Juraj Farka{\vs} and Florian B{\"o}hm and Klaus J. G. Wallmann and J. C. Blenkinsop and Anton Eisenhauer and Robert van Geldern and Axel Munnecke and S. M. Voigt and J{\'a}n Veizer},
  year={2007}
}
A total of 280 brachiopods of Ordovician to Cretaceous age, complemented by published data from belemnites and planktonic foraminifera, are used to reconstruct the evolution of calcium isotope composition of seawater (δ44/40CaSW) over the Phanerozoic. The compiled δ44/40CaSW record shows a general increase from ∼1.3‰ (NIST SRM 915a) at the beginning of the Ordovician to ∼2‰ at present. Superimposed on this trend is a major long-term positive excursion from the Early Carboniferous to Early… CONTINUE READING

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