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| 辽西凌源雾迷山组碳酸盐岩碳氧同位素特征研究 | |
| 引用本文： | 李鑫,罗顺社,旷红伟,苏洁,银晓.辽西凌源雾迷山组碳酸盐岩碳氧同位素特征研究[J].沉积与特提斯地质,2009,29(2):107-111. |
| 作者姓名： | 李鑫 罗顺社 旷红伟 苏洁 银晓 |
| 作者单位： | 1. 长江大学,油气资源与勘探技术教育部重点实验室,湖北,荆州,434023;长江大学,地球科学学院,湖北,荆州,434023 2. 长江大学,地球科学学院,湖北,荆州,434023 3. 长江大学,地球科学学院,湖北,荆州,434023;长江大学,地球物理与石油资源学院,湖北,荆州,434023 |
| 基金项目： | 国家自然科学基金，中石化海相前瞻性项目 |
| 摘 要： | 辽西凌源雾迷山组碳酸盐岩碳氧同位素和Mn/Sr比值数据反映了碳酸盐岩的原始沉积特征.δ13CPDB数值范围-2‰～2‰,δ18OPDB数值范围为-10‰～-4‰,其平均值分别为0.15‰,-6.2‰,碳同位素组成具有旋回性变化特征.在雾迷山组一段中上部,δ13C表现出明显的正漂移,可能为藻类的大量繁殖、有机碳增加所引起.δ18O的增加为气候变冷和冰川作用的结果.在δ13C为负值的层段,δ18O数值较高.碳氧同位素组成的这种特征可能与海平面变化有关. |
| 关 键 词： | 辽西 凌源 雾迷山组 碳氧同位素 海平面变化 |
Carbon and oxygen isotopic evolution in the carbonate rocks from the Wumishan Formation in Lingyuan,western Liaoning |
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| LI Xin,LUO Shun-she,KUANG Hong-wei,SU Jie,YIN Xiao.Carbon and oxygen isotopic evolution in the carbonate rocks from the Wumishan Formation in Lingyuan,western Liaoning[J].Sedimentary Geology and Tethyan Geology,2009,29(2):107-111. | |
| Authors: | LI Xin LUO Shun-she KUANG Hong-wei SU Jie YIN Xiao |
| Institution: | 1. Key Laboratory of Oil Resources, Yangtze University, Jingzhou 434023, Hubei, China;2. School of Geosciences, Yangtzi University, Jingzhou 434023, Hubei, China;3. School of Geophysics and Oil Resources, Yangtze University, Jingzhou 434023, Hubei, China |
| Abstract: | The original deposits of the carbonate rocks from the Wumishan Formation in Lingyuan, western Liaoning are explored on the basis of carbon and oxygen isotopic and Mn/Sr ratios. The δ13CPDB values range between -2‰ and 2‰ and δ18O values range between -10‰ and -4‰, with an average of 0.15‰ and -6.2‰, respectively. The δ13C values exhibit a markedly positive shift in the carbonate rocks from the upper and middle parts of the first member of the Wumishan Formation. This shift may be caused by abundant algal production and organic carbon increase. The climatic cooling down and glaciation gave rise to the increase of δ18O values, especially in the levels with negativeδ13C values. The carbon and oxygen isotopic evolution in the carbonate rocks may be correlated to the sea-level changes. |
| Keywords: | Western Liaoning Lingyuan Wumishan Formation carbon and oxygen isotopes sea-level changes |
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