摘要
晚第四纪尤其是全新世是地球气候系统演化的一个关键地质时期,是探究全球及区域重大气候环境事件,揭示其内在演化规律,预测未来气候变化的关键时段.国内外发表的文献中,主要的年代学方法有:AMS14C年代学、石笋U系测年和纹层年代学等.其中纹层年代学被认为是比较精确的定年方法.近年来,国内外学者在中国的一些湖泊中发现了年纹层沉积,例如龙岗火山区的小龙湾、四海龙湾及二龙湾玛珥湖,柴达木盆地的苏干湖,青藏高原东部的新路海以及可可西里地区的库赛湖.本文概述我国近年来湖泊纹层年代学研究进展,总结中国湖泊年纹层类型、特征及纹层年代学研究方法、误差估计等方面的进展,并提出未来年纹层研究应注意的问题,以期促进中国湖泊沉积物年纹层研究的进一步发展.
Varve chronology is regarded as a relatively accurate dating method for the late Quaternary, particularly for the Hol- ocene. There are only a few lakes officially reported with annual lamination in China, including Xiaolongwan, Sihallongwan and Er- tong＇wan in Longgang Volcanic Field, Sugan Lake in Chadam Basin, Xinluhai Lake and Kusai Lake on the Tibetan Plateau. Varve- based chronologies have been established in these lakes. Most studies on varved sediments have focused on the reconstructions of paleoenvironment. In this paper, we have introduced the research progresses on varve chronology, sumnmrized the ＂annual＂ char- acteristics of varved lake sediments in China, and emphasized the varve counting, error estimate and verification. We also have pointed out the problems existing in the varve studies that should be paled attentions in the future. This study will standardize the varve chronology researches and promote the development of varve chronologies of lake sediments in China.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2017年第2期266-275,共10页
Journal of Lake Sciences
基金
国家自然科学基金项目(41472320)
湖泊与环境国家重点实验室开放基金项目(2014SKL001)联合资助
