干旱区生态环境知识资源中心(Arid): 柴达木盆地尕海湖沉积物粒度特征及其古气候意义

Arid

	柴达木盆地尕海湖沉积物粒度特征及其古气候意义
其他题名	GRAIN-SIZE CHARACTERISTICS AND THEIR ENVIRONMENTAL SIGNIFICANCE OF GAHAI LAKE SEDIMENTS IN QAIDAM BASIN
	陈碧珊; 潘安定; 张元芳
来源期刊	海洋地质与第四纪地质
ISSN	0256-1492
出版年	2010
卷号	30 期号:2 页码:111-119
中文摘要	以尕海湖DG02钻孔沉积物为研究对象,利用高分辨率的粒度数据,结合岩性、孢粉特征,分析其粒度特征及近11 000 aBP来的气候环境变化.研究发现,尕海湖沉积物记录了该区域湖泊水体逐渐上升又逐渐减少的过程,气候环境变化大致分为4个阶段:(1)冰消期晚期(11 324~10 290 aBP)气候干旱,湖泊水位下降,面积收缩,水动力较强,沉积颗粒较粗;(2)早全新世(10 290~8 850 aBP),气候转向湿润,湖泊水位上升,为浅水至深水的过渡阶段,颗粒由粗变细;(3)中全新世(8 850~4 400 aBP),气候更加湿润,湖水水位达到最高,面积扩大,水动力达到最弱,沉积颗粒最细;(4)晚全新世(4 400~200 aBP),气候变干,湖泊强烈收缩,湖面下降,水动力达到最强,沉积颗粒最粗.尕海湖DG02钻孔沉积物粒度所记录的区域气候干湿变化及一些重要的干湿事件与国内外研究显示出较好的一致性
英文摘要	This article analyzes characteristics of grain-sizes and changes of climate and environment since about 11 000 aBP ago using high-resolution grain-size data and information of lithology and pollen assemblage from core DG02 in Gaihai Lake. The research result shows that sediment in Gahai Lake has well recorded the processes of the lake water from wetting-up to drying-up. The climatic changes can be divided into four stages as follows: late deglaciation (11 324~10 290 aBP), when the lake level was low, the area was shrinking, the driving force was strong and the sediment particles were coarse with arid climate;early Holocene(10 290~8 850 aBP), when the lake water level was high, the sediment particles were fine with wet climate in the transition phase;mid Holocene(8 850~4 400 aBP), when the lake water level was much lower and expanding, the driving force was the weakest and the sediment particles were the finest with wet climate;late Holocene(4 400~200 aBP), when the lake water level was low and shrinking, the driving force was strong and the sediment particles were coarse with arid climate. The climatic changes and important dry and wet events in Gahai Lake area were coincident with other research results at home and abroad
中文关键词	粒度特征 ; 湖泊沉积物 ; 古气候环境 ; 末次冰期以来 ; 尕海湖
英文关键词	grain-size characteristics lake sediments paleoclimate and paleoenvironment since the last glacial epoch Gahai Lake
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:3928182
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225276
作者单位	广州大学地理科学学院, 广州, 广东 510006, 中国
推荐引用方式 GB/T 7714	陈碧珊,潘安定,张元芳. 柴达木盆地尕海湖沉积物粒度特征及其古气候意义[J],2010,30(2):111-119.
APA	陈碧珊,潘安定,&张元芳.(2010).柴达木盆地尕海湖沉积物粒度特征及其古气候意义.海洋地质与第四纪地质,30(2),111-119.
MLA	陈碧珊,et al."柴达木盆地尕海湖沉积物粒度特征及其古气候意义".海洋地质与第四纪地质 30.2(2010):111-119.