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

现代地质 ›› 2012, Vol. 26 ›› Issue (4): 712-715.

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

文雪峰¹, 魏晓², 杨瑞东³, 田明中¹

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

收稿日期:2011-12-25 修回日期:2012-04-20 出版日期:2012-08-18 发布日期:2012-08-24
通讯作者: 田明中，男，教授，博士生导师，1951年出生，第四纪地质学专业，主要从事第四纪地质和生态及旅游地学研究。 Email: tianmz@cugb.edu.cn。
作者简介:文雪峰，男，博士研究生，1982年出生，第四纪地质学专业，主要从事第四纪地质及旅游地质研究。 Email: wenxuefeng104@yahoo.com.cn。
基金资助:
中央高校基本科研业务费专项资金项目(2-9-2011-016)。

Accumulation Age and Rate of Peat in the Longli Alpine Meadow of Guizhou and Their Organic Carbon Isotope Records

WEN Xue-Feng^-1, WEI Xiao^-2, YANG Rui-Dong^-3, TIAN Meng-Zhong^-1

1School of Earth Sciences and Resources, China University of Geosciences, Beijing100083, China;
2Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou550002,China;
3College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou550003,China

Received:2011-12-25 Revised:2012-04-20 Online:2012-08-18 Published:2012-08-24

摘要/Abstract

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, &delta, ¹³C, 贵州

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 C₃plants 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.

Key words: Longli alpine meadow, peat, accumulation rate, δ13C, Guizhou

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.

WEN Xue-Feng, WEI Xiao, YANG Rui-Dong, TIAN Meng-Zhong. Accumulation Age and Rate of Peat in the Longli Alpine Meadow of Guizhou and Their Organic Carbon Isotope Records[J]. Geoscience, 2012, 26(4): 712-715.

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