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中国南部贵州省的睦化剖面是国际泥盆纪/石炭纪三个界线层型候选剖面之一。虽然地层和古生物的资料已有发表,但稳定同位素的研究尚未做过。睦化剖面详细的δ~(13)C和δ~(18)O的分析结果揭示,在Siphonodella crenulata牙形石带底部存在一个有意义的短暂δ~(13)C负异常,其值为—8～9‰。这是首次在泥盆纪与石炭纪界线处发现的δ~(13)C负异常,这类似于二叠纪/三叠纪界线、白垩纪/第三纪界线 前寒武纪/寒武纪界线报导的δ~(13)C异常。因
The Muhua section in Guizhou province of southern China is one of the candidate sections of the international Devonian / Carboniferous boundary line types. Although data on formation and paleontology have been published, studies on stable isotopes have not been done. The detailed analysis of δ ~ (13) C and δ ~ (18) O at the Muhua profile shows that there is a significant short δ 13 C negative anomaly at the bottom of the Siphonodella crenulata conodont belt, 8 ~ 9 ‰. This is the first δ 13 C negative anomaly found at the boundary between Devonian and Carboniferous, which is similar to the Permian / Triassic boundary and the Cretaceous / Tertiary boundary Precambrian / Cambrian Boundary reported δ ~ (13) C abnormalities. because