Geo-Marine Letters

, Volume 11, Issue 2, pp 96–102 | Cite as

Depositional environments inferred from variations of calcium carbonate, organic carbon, and sulfide sulfur: A core from southeastern Arabian Sea

  • A. L. Paropkari
  • S. D. Iyer
  • O. S. Chauhan
  • C. Prakash Babu
Article
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Revised:

Abstract

The variations in CaCO3 and organic carbon and their inter-relationship in a core from the southeastern Arabian Sea (water depth 2,212 m) have been used to demarcate the Holocene/Pleistocene boundary; an increased terrigenous deposition during Late Pleistocene has been inferred. The higher contents of organic carbon and sulfide sulfur and their negative relationship clearly establish the existence of a reducing environment below 65 cm subbottom depth. The occurrence of pyrite framboids and crystals, present only on the surface of fecal pellets (80–85 cm), has been discussed in terms of significance of reducing microenvironment.

Keywords

Organic Carbon Pyrite Calcium Carbonate Fecal Pellet Polysulfide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag New York Inc. 1991

Authors and Affiliations

  • A. L. Paropkari
    • 1
  • S. D. Iyer
    • 1
  • O. S. Chauhan
    • 1
  • C. Prakash Babu
    • 1
  1. 1.National Institute of OceanographyGoaIndia

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