Identification of primary Ce-anomaly signatures in fossil biogenic apatite: Implication for the Cambrian oceanic anoxia and phosphogenesis

S. Morad, S. Felitsyn

Research output: Contribution to journalArticlepeer-review

108 Scopus citations

Abstract

Based on REE analyses of 105 world-wide distributed Cambrian fossil apatite samples and eight late Neoproterozoic phosphate concretions, a close relationship is established between the concentrations of MREE and Ce anomalies. Shale La/SmN ratios of 0.35 is suggested as a critical value for the discrimination of the natural Ce anomaly acquired during pre-burial/early diagenesis by biogenic apatite from an artificial Ce anomaly induced due to the calculation. Ce anomalies in apatites with flat REE distribution and La/SmN ratio >0.35 may be used as indicative of oceanic anoxia.

Original languageBritish English
Pages (from-to)259-264
Number of pages6
JournalSedimentary Geology
Volume143
Issue number3-4
DOIs
StatePublished - 2001

Keywords

  • Apatite
  • Cambrian
  • Oceanic anoxia
  • Precambrian
  • REE

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