| 摘要: |
| 笔者通过海平面变化曲线与碳氧同位素曲线比较,发现两者曲线基本吻合。碳同位素曲线显示的海平面变化更接近露头层序地层的海平面变化;氧同位素曲线与露头层序海平面变化大体一致,局部出现相反结论。碳同位素曲线对沉积环境变化较氧同位素曲线更敏感。通过两者曲线研究,说明运用稳定同位素曲线变化可作为浊积岩层序地层学研究的一个研究手段。 |
| 关键词: 浊积岩 露头层序地层 同位素曲线 |
| DOI： |
| 附件 |
| 投稿时间：2002-10-25 |
| 基金项目:中国西部大中型沉积盆地分析及油气远景研究项目(编号200113000071) |
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| The application of carbon and oxygen isotopes to the sequence stratigraphy of deep-water turbidites: An example from the Tianping section in Dayong, Hunan |
| CHEN Ming, WAN Fang, PU Xinchun |
(1. Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China;
2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China) |
| Abstract: |
| The variations in carbon and oxygen isotopic values may be used to deduce the sea-level changes of deposi-tional environments and to study the sequence stratigraphy of deep-water turbidites. The correlation of the sea-level curve based on the outcrop sequence stratigraphy and carbon and oxygen isotopic curves for the Tianping section in Dayong, Hunan shows that:(1) the sea-level curve based on the outcrop sequence stratigraphy is in general agreement with the carbon and oxygen isotopic curves; (2) sea-level changes indicated by the carbon isotopic curve approximate to those based on the outcrop sequence stratigraphy, while the oxygen isotopic curve is in general agreement with those based on the outcrop sequence stratigraphy. Occasionally the opposite situations are present; (3) the carbon isotopic curve is more sensitative to sediment changes. The higher δ13C values may represent the fine-grained turbidites and deep-water sediments in the same cycles. |
| Key words: turbidite outcrop sequence stratigraphy isotopic curve |
