Study of the varve record from Erlongwan maar lake, NE China, over the last 13 ka BP  

作　　者：YOU HaiTao LIU JiaQi LIU Qiang CHU GuoQiang Patrick RIOUAL HAN JingTai 

机构地区：[1]Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China [2]College of Earth Sciences, Jilin University, Changchun 130061, China

出　　处：《Chinese Science Bulletin》2008年第2期262-266,共5页

基　　金：CAS Key Project (Grant No. KZCX3-SW-145);the National Natu-ral Science Foundation of China (Grant No. 4032014043)

摘　　要：在来自跨越最后 13 ka BP 的 Erlongwan maar 湖的一个沉积序列，二种主要纹泥类型能被认出：源於生物的纹泥(从礼品到 -11.2 ka BP， 0-632 厘米) 并且碎屑状的纹泥(从 -11.2 到 -12.7 ka BP， 632-700 厘米) 。基于在沉积包含的水藻的主导的类型，源於生物的纹泥能被分类进 dinocyst 源於生物的纹泥(0-63 厘米) 并且混合(dinocyst 和硅藻) 源於生物的纹泥(214-632 厘米) 。在这篇论文，纹泥的形成过程和部件被描述，为纹泥在整个记录变化的类型的可能的原因被讨论，一张高分辨率的纹泥年表被建立跨越最后 13 ka BP。尽管进一步的纹泥数和错误评价被需要，这里介绍的结果为学习 Erlongwan maar 湖的 palaeoclimate 记录代表一个稳固的基础。In a sediment sequence from Erlongwan maar lake that spans the last 13 ka BP, two main varve types can be recognized： biogenic varves （from the present to -11.2 ka BP, 0-632 cm） and clastic varves （from -11.2 to -12.7 ka BP, 632-700 cm）. Based on the dominant types of algae contained in the sediment, the biogenic varves can be classified into dinocyst-biogenic varves （0-63 cm） and mixed （dinocyst and diatom）-biogenic varves （214-632 cm）. In this paper, the formation process and components of the varve are described, the possible reason for the types of varve changing throughout the record is discussed and a high-resolution varve chronology is established spanning the last 13 ka BP. Although further varve counting and error assessment are needed, the results presented here represent a solid foundation for studying the palaeoclimate record of Erlongwan maar lake.

关 键 词：生物纹泥 碎屑状纹泥 腰鞭毛虫 纹泥年代学 

分 类 号：Q95[生物学—动物学]