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Carbonates and Evaporites

, Volume 13, Issue 1, pp 108–114 | Cite as

C12-enrichment along intraformational unconformities within Proterozoic Bhander Limestone, Son valley, India and its implication

  • Subir Sarkar
  • Partha Pratim Chakraborty
  • S. K. Bhattacharya
  • Santanu Banerjee
Article

Abstract

The late Proterozoic Bhander Limestone in Son valley, India developed in a very shallow epeiric ramp setting that partially emerged time and again above the sea surface. Landward extensive karstified sediments attest to three events of considerable regressions.The resultant intraformational unconformities are characterized by C12-enrichment in the scale of their Phanerozoic equivalents. Early diagenetic void-fill cements in these karsts are even more enriched. These sediments and cements in relatively seaward part show relatively lesser degree of enrichment, possibly because of shorter duration of exposure. The late Proterozoic meteoric water seems to have turned rich in C12 with contribution from land plants similar to Phanerozoic meteoric water.

Keywords

Unconformity Calcarenite Unconformity Surface Vindhyan Supergroup American Association ofPetroleum Geology 
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

© The Northeasten Science Foundation, Inc 1998

Authors and Affiliations

  • Subir Sarkar
    • 1
  • Partha Pratim Chakraborty
    • 2
  • S. K. Bhattacharya
    • 3
  • Santanu Banerjee
    • 1
  1. 1.Department of Geological SciencesJadavpur UniversityCalcuttaIndia
  2. 2.Geological Survey of IndiaCalcuttaIndia
  3. 3.Physical Research LaboratoryAhmedabadIndia

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