黄陵背斜东南缘埃迪卡拉系碳稳定同位素组成特征及有机质发育关系讨论

通过在黄陵背斜东南缘部署实施的一口页岩气调查井(EYD5)，获取了埃迪卡拉系碳同位素参数和相关有机碳数据，建立了该区埃迪卡拉系陡山沱组-灯影组蛤蟆井段碳同位素曲线，在陡山沱组识别出4次负漂移，2次正漂移区间，在灯影组蛤蟆井段识别出1次负漂移，1次正漂移区间，并可在区域范围内有效对比。探讨了该区陡山沱组四段至灯影组蛤蟆井段在区域上的对比标志，明确了该区陡山沱组碳同位素异常与有机碳含量无相关性，碳同位素的正、负漂移区间均可发育富有机质层段，持续的δ13C负值区间对应富有机质页岩层段发育。 

Carbon isotope characteristics and organic matter development of the Ediacaran in the southeastern margin of the Huangling anticline,western Hubei

The carbon isotope and TOC data of the Ediacaran in the southeastern margin of the Huangling anticline have been obtained by the testing analysis of core samples from the Well EYD5. The carbon isotope curves of the Ediacaran Doushantuo Formation to the Hamajing Member of the Dengying Formation have been established, and 4 negative excursions and 2 positive excursions are recongnized, as well as 1 negative excursion and 1 positive excursions interval in the Hamajing Member of the Dengying Formation. This can be compared with the reported curves from regional sections during this period. In this paper, the carbon isotope markers within the Ediacaran Doushantuo Formation to the Hamajing Member of the Dengying Formation for stratigraphic correlation are summarized, and the TOC variation in the Doushantou Formation has no relationship with carbon isotope anomaly, but the organic-rich shale usually has continuous negative value of delta δ13C.