Carbon isotope anomaly and other geochemical changes at the Triassic-Jurassic boundary from a marine section in Hungary

J. Pálfy, A. Demény, J. Haas, M. Hetényi, Michael J. Orchard, István Vetö

Research output: Contribution to journalArticle

203 Citations (Scopus)

Abstract

Most mass extinctions are linked with carbon isotope excursions, implying that biotic crises are coupled with changes in the global carbon cycle. The isotopic evolution during the end-Triassic extinction is far less documented than that for the other major Phanerozoic extinctions. Here we report a sharp and short-lived -3.5‰ excursion in carbon isotope values for carbonate (δ13Ccarb) corresponding to a -2‰ excursion in the isotopic composition of marine organic matter (δ13Corg) and other geochemical changes from the topmost Triassic in the Csövár section in Hungary. The Triassic-Jurassic boundary is defined by ammonoid and conodont biostratigraphy in a marine limestone sequence. A decline in primary productivity, release of methane through dissociation of gas hydrates, or a combination of the two may account for the correlative biotic and isotopic events.

Original languageEnglish
Pages (from-to)1047-1050
Number of pages4
JournalGeology
Volume29
Issue number11
DOIs
Publication statusPublished - Nov 2001

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carbon isotope
Triassic
Jurassic
anomaly
extinction
mass extinction
conodont
gas hydrate
Phanerozoic
carbon cycle
biostratigraphy
isotopic composition
methane
limestone
carbonate
organic matter
productivity

Keywords

  • Carbon cycle
  • Extinction
  • Jurassic
  • Stable isotopes
  • Triassic

ASJC Scopus subject areas

  • Geology

Cite this

Carbon isotope anomaly and other geochemical changes at the Triassic-Jurassic boundary from a marine section in Hungary. / Pálfy, J.; Demény, A.; Haas, J.; Hetényi, M.; Orchard, Michael J.; Vetö, István.

In: Geology, Vol. 29, No. 11, 11.2001, p. 1047-1050.

Research output: Contribution to journalArticle

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AU - Orchard, Michael J.

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