| 华南 Pc－C 过渡期深水相剖面的碳、氧同位素记录 |
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| 引用本文：潘家永,马东升,曹双林,夏菲,陈少华,吴凯.2005.华南 Pc－C 过渡期深水相剖面的碳、氧同位素记录[J].地球学报,26(z1):182-185. |
| DOI：10.3975/cagsb.2005.s1.58 |
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| 基金项目:国家自然科学基金项目（批准号：40272080与40232020）和973项目（编号：G1999043210）共同资助。 |
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| 中文摘要:本文对湘西三岔、杆子坪与贵州织金3个震旦纪－早寒武世深水相剖面进行了系统的碳氧同位素研究，研究表明，这3个剖面下寒武统底部都出现明显的δ13C负漂移。其δ13C在剖面上的变化规律与全球浅海相碳酸盐部面相似。这可能是下寒武统海洋生物产率的降代而导致沉积碳酸盐的δ13C负漂移。 |
| 中文关键词:碳同位素 深水相 黑色岩系 华南 |
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| Carbon and Oxygen Isotopic Records from the Deep-Water Facies Sections of the Precambrian-Cambrian Transitional Period |
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| Abstract:Carbon and oxygen isotopic records from three deep-water facies sections(Sancha, Ganziping and Zijin) of the Precambrian-Cambrian transitional period in South China were studiedin this paper. It is shown that there exist clear negative δ13C anomalies at the bottom of Early Cambrian strata in the three deep-water facies sections, whose characteristics are similar to those of shallow-water facies sections all over the world. The negative δ13C shift at the bottom of Early Cambrian might have been caused by decrease of bio-productivity. |
| keywords:carbon isotope deep-water facies black rocks South China |
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