Title: Carbon isotope study of the Permian-Triassic boundary sequences in China
Abstract: Systematic investigations for carbon isotopes on five stratigraphic sections of the marine carbonate strata from the Upper Permian to the Lower Triassic in the southern China have been conducted. The results obtained in these sections indicate the following characteristics: (1) The δ13C-values varying from −8.1 to +5.5%o. (2) The δ13C-values vary periodically from the base to the top in a stratigraphic unit. (3) The δ13C-values are positive below, but negative above the Permian-Triassic boundary. The δ13C-values display a sharp drop within a limited stratigraphic interval (0.1 – 0.5 m) across the Permian-Triassic boundary. Our study and carbon isotope investigations of marine carbonate sequences across the Permian-Triassic boundary in other areas suggest that a drastic shift in carbon isotope compositions at the Permian-Triassic boundary probably occurred contemporaneously and globally, at least in the Tethys areas. The variation of carbon isotope compositions in marine stratigraphy sections may be used as a new criterion for stratigraphic correlation.
Publication Year: 1991
Publication Date: 1991-02-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 24
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot