Carbon and Oxygen Isotopic Study across the Cambrian-Ordovician Boundary Strata in East China

Shen Weizhou; Fang Yiting; Ni Qisheng; Liu Yan; Lin Yuping

Carbon and Oxygen isotopic study of some representative Cambrian-Ordovician boundary strata ofvarious stratigraphic areas in East China has done.It was indicated that the variation of δ^18,O values inboundary strata is larger and the regularity of variation is not conspicuous because of the difference ofsedimentary environment and the effect of diagenetic alteration.But the variation of δC values is smalland the various degree of excursion in the boundary strata occurs.The excursive stratohorizon is consis-tent with the variation boundary of major biotic population.According to the study of various data, it wasbelieved that the excurson of carbon isotopic compositions is likely attributed to the televation and subsi-dence of sea level from the Late Cambrian to Early Ordovician.

Carbon and Oxygen Isotopic Study across the Cambrian-Ordovician Boundary Strata in East China

Department of Earth Sciences,Nanjing University,Nanjing,210093

Received Date: 1996-07-30

Publish Date: 1997-12-10

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Abstract: Carbon and Oxygen isotopic study of some representative Cambrian-Ordovician boundary strata ofvarious stratigraphic areas in East China has done.It was indicated that the variation of δ^18,O values inboundary strata is larger and the regularity of variation is not conspicuous because of the difference ofsedimentary environment and the effect of diagenetic alteration.But the variation of δC values is smalland the various degree of excursion in the boundary strata occurs.The excursive stratohorizon is consis-tent with the variation boundary of major biotic population.According to the study of various data, it wasbelieved that the excurson of carbon isotopic compositions is likely attributed to the televation and subsi-dence of sea level from the Late Cambrian to Early Ordovician.

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Carbon and Oxygen Isotopic Study across the Cambrian-Ordovician Boundary Strata in East China

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