Changes of grain size from peat profile in eastern mountainous area over past 2000 years,Jilin Province,Northeast China  

作　　者：ZHANG Xinrong WANG Jiayu PING Shuaifei LI Yaran 

机构地区：[1]College of Earth Sciences,Jilin University,Changchun 130061,China [2]Key Laboratory of Mineral Resources Evaluation in Northeast Asia,Ministry of Natural Resources,Jilin University,Changchun 130061,China [3]Key Laboratory for Oil Shale and Coexisting Minerals,Jilin University,Changchun 130061,China [4]Standing Committee of the People's Congress of Ninghe District,Tianjin City,Tianjin 301574,China

出　　处：《Global Geology》2024年第3期132-144,共13页世界地质（英文版）

基　　金：Supported by projects of National Natural Science Foundation of China(Nos.40702027,41472173);Ministry of Land and Resources Outstanding Youth Science and Technology Talent Training Program of China(No.201311111).

摘　　要：Plenty of high-resolution paleoclimate investigations of the last thousand years were carried out to potentially predict future climate changes.Mountainous ombrotrophic peatland is one of the best recorders for high-resolution paleoclimate studies in the forest area.Grain size analysis was carried out on ombrotrophic peat profile in the eastern mountainous region of Jilin Province,Northeast China.The peat profile lasts the past 2000 a by four radiocarbon(AMS14C)ages.The results showed that the inorganic minerals in the peat profile are mainly silt,with some contribution from clay and a minor amount of sand,which are mainly due to wind dust and suspended transportation.Two paleoclimate stages are found in this peat profile by phytolith analysis,peat cellulose isotope research and historical documents:ca.45–1550 AD,relatively cold period;ca.1550 AD–present,relatively warm period.This finding is important for the initial study of paleoclimatic changes over the last 2000 a in the mountainous area of eastern mountainous area,Jilin Province,Northeast China.

关 键 词：peat sediments grain size analysis PALEOCLIMATE 

分 类 号：P534.6[天文地球—古生物学与地层学] P532[天文地球—地质学] P512.2