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| 贵州龙里高山草原泥炭沉积年代、速率及其有机碳同位素记录 | |
| 引用本文： | 文雪峰,魏晓,杨瑞东,田明中.贵州龙里高山草原泥炭沉积年代、速率及其有机碳同位素记录[J].现代地质,2012,26(4):712-715. |
| 作者姓名： | 文雪峰 魏晓 杨瑞东 田明中 |
| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083 2. 中国科学院地球化学研究所,贵州贵阳,550002 3. 贵州大学资源与环境工程学院,贵州贵阳,550003 |
| 基金项目： | 中央高校基本科研业务费专项资金项目 |
| 摘 要： | 通过对贵州龙里高山草原泥炭进行加速器(AMS)14C测年和有机碳的测定,获得泥炭层底部0.90 m和0.55 m处年龄分别为(7 933±33)a B.P.和(7 733±28)a B.P.,计算出泥炭层堆积速率为1.75 mm/a。获得泥炭层δ13C为-28.9‰～-26.6‰,平均为-27.8‰,说明植被以C3植物为主,与现在坪台沼泽上苔藓繁盛相似。结合其他地区的气候记录推断,研究区泥炭发育于相对温暖湿润的气候环境,是全新世大暖期的第一个暖湿期形成的产物。 |
| 关 键 词： | 龙里高山草原 泥炭 沉积速率 δ13C 贵州 |
Accumulation Age and Rate of Peat in the Longli Alpine Meadow of Guizhou and Their Organic Carbon Isotope Records |
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| WEN Xue-feng , WEI Xiao , YANG Rui-dong , TIAN Ming-zhong.Accumulation Age and Rate of Peat in the Longli Alpine Meadow of Guizhou and Their Organic Carbon Isotope Records[J].Geoscience——Journal of Graduate School,China University of Geosciences,2012,26(4):712-715. | |
| Authors: | WEN Xue-feng WEI Xiao YANG Rui-dong TIAN Ming-zhong |
| Institution: | 1(1.School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China; 2.Institute of Geochemistry,Chinese Academy of Sciences,Guiyang,Guizhou 550002,China; 3.College of Resources and Environmental Engineering,Guizhou University,Guiyang,Guizhou 550003,China) |
| Abstract: | On basis of radio carbon isotope and stable carbon isotope test on samples from the Longli alpine meadow,Guizhou,it is figured out that ages of the samples in 0.90 m and 0.55 m of the peat layer bottom are(7,933±33) a B.P.and(7,733±28) a B.P.,respectively and rate of peat layer accumulation is 1.75 mm/a.The δ13C of the peat layer,ranging from-28.9‰ to-26.6‰,with average value of-27.8‰,illustrates that C3 plants are the primary vegetations,which is similar to the flourishing moss on the modern platform marsh.Compared with the climatic data of other areas,we infer that the peat here grew in relatively warm moist climatic environment,and the peat layer was the product formed in the first warm and humid period of the big warm period in Holocene. |
| Keywords: | Longli alpine meadow peat accumulation rate δ13C Guizhou |
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