福建赖源泥炭记录的全新世气候演变序列及区域对比分析  

Holocene Climate Evolution Sequence and Regional Comparative Analysis of Laiyuan Peat Records in Fujian Province

作　　者：张晓君 Zhang Xiaojun(Northern Fujian Geologic Party of Fujian Province,Fuzhou,350002)

机构地区：[1]福建省闽北地质大队,福州350002

出　　处：《福建地质》2022年第3期177-187,共11页Geology of Fujian

基　　金：福建省地质矿产勘查开发局,“福建顺昌赖源泥炭记录的全新世气候环境演变研究”。

摘　　要：通过对赖源泥炭开展高精度AMS^(14)C测年和正构烷烃、总有机碳同位素(δ^(13)C_(TOC))、烧失量(LOI)等指标的测试分析,可将当地7.490~3.509cal.ka BP期间的气候变化历史恢复如下:气候总体较湿润,全新世气候适宜期(即夏季风强度最大的时期)为6.3~3.5cal.ka BP,期间分别于7.2~7.0cal.ka BP、6.5~6.3cal.ka BP、5.8~5.2cal.ka BP、4.8~4.6 cal.ka BP、4.0cal.ka BP发生5次快速气候变化事件(即弱季风事件)。经区域对比,赖源泥炭记录的全新世气候适宜期与省内龙岩仙云洞石笋δ^(18)O、福州盆地沉积磁学的分析结果较为一致,亦与东北地区的孤山屯泥炭、天池湖泊的研究结果大致对应,显示其均位于东亚季风区,主要受东亚夏季风的影响;赖源泥炭记录的5次快速气候变化事件既有全球性,又有区域性,也有其特殊性。Based on the high-precision AMS^(14)C dating of Laiyuan peat and the testing and analysis of n-alkanes,total organic carbon isotopes(δ^(13)C_(TOC)),loss of combustion(LOI)and other indicators,the local climate change history of 7.490~3.509cal.ka BP can be restored as follows:The climate is generally more humid,The Holocene climate suitability period(i.e.,the maximum summer wind intensity period)is 6.3~3.5cal.ka B P.,Five rapid climate change events(i.e.weak monsoon events)occurred in 7.2~7.0cal.ka BP,6.5~6.3cal.ka BP,5.8~5.2cal.ka BP,4.8~4.6cal.ka BP,and 4.0cal.ka BP.After regional comparison,the Holocene climate suitability period recorded of Laiyuan peat is relatively consistent with the analysis results of Longyan Xianyun cave stalagmiteδ^(18)O and Fuzhou Basin sediment magnetism,and also roughly corresponding to the research results of Gushantun peat and Tianchi Lake in northeast China.It shows that they are located in the East Asian monsoon region,mainly affected by the east Asian summer winds.The five rapid climate change events recorded of Lai Yuan peat are both global,regional and special.

关 键 词：泥炭 AMS^(14)C测年 正构烷烃 全新世气候演变 区域对比 福建赖源 

分 类 号：P534.632[天文地球—第四纪地质学] P467[天文地球—古生物学与地层学]