湖泊科学2011，Vol.23Issue(5)：681-685,5.
贵州草海沉积物碳酸盐碳同位素异常正值的发现及其环境指示意义
Discovery of abnormal positive values of carbon isotope of carbonate sediments from Lake Caohai, Guizhou Province and their implications
摘要
Abstract
Carbon isotopes(δ13C) of carbonate from sediment core has been measured in Lake Caohai, Guizhou Province, southwest China. The results showed that δ13 C values varied between - 14.25%c and 23.10%o, which was the largest amplitude of carbon isotope variations and the highest positive values discovered so far in lacusrine carbonate sediments. On the basis of combination with oxygen isotope, organic matter and carbonate content proxies, we suggested that the carbon isotope of carbonate from Lake Caohai was controlled by photosynthesis/respiration of aquatic plants, and the input of bacteria to carbon isotope fractionation of organic matter might be responsible for the abnormal positive δI3C values in Lake Caohai. Therefore, much attention should be paid to the carbonate δ13 C in Lake Caohai in the future research.关键词
草海/碳酸盐同位素/异常正值/细菌Key words
Lake Caohai/ carbon isotope/ abnormal positive/ bacteria引用本文复制引用
朱正杰,陈敬安,李航,任世聪,曾艳,李妍均..贵州草海沉积物碳酸盐碳同位素异常正值的发现及其环境指示意义[J].湖泊科学,2011,23(5):681-685,5.基金项目
国家科技支撑计划项目(2011BAC02B0201)和贵州省科技计划项目联合资助. （2011BAC02B0201）
