干旱区生态环境知识资源中心(Arid): 腾格里沙漠西北缘湖泊沉积记录的区域风沙特征

Arid

	腾格里沙漠西北缘湖泊沉积记录的区域风沙特征
其他题名	Eolian Activity and Environment Evolution History Recorded by the Qingtu Lake, NW Tengger Desert
	隆浩 1; 王乃昂2 ; 马海州 1; 李育 2
ISSN	1000-0550
出版年	2007
卷号	25 期号:4 页码:626-631
中文摘要	对位于腾格里沙漠西北缘的青土湖QTL01剖面进行了沉积物粒度分析,并利用粒级-标准偏差模型,提取出了对沉积环境变化敏感的粒度组分,60～550 mum粒级含量指示了区域风沙活动的强弱,而＜60 mum颗粒含量指示了入湖径流量的变化.结合14C测年结果,探讨了10～2.5 Gal kaBP青土湖地区风沙活动和环境演化特征:10～7.8Cal kaBP,＜60 mum组分含量逐渐增加,指示湖区入湖径流逐渐增多,同时60～550 mum组分含量逐渐减少表明湖区风沙活动逐渐减弱,总体上表明了早全新世该区域环境逐渐转湿;7.8～7.5 Cal kaBP,60～550 mum组分含量几乎占该阶段沉积物的95%以上,表明风沙活动极为强烈,区域非常干旱;7.5～5 Cal kaBP,沉积物中＜60 mum、60～550 mum的组分含量相对稳定,且＜60 mum组分含量达到了10～2.5 Cal kaBP期间最高值,表明了区域风沙活动较弱,气候环境湿润稳定;5～2.5 Cal kaBP,＜60 mum组分含量逐渐降低,而60～550 mum组分逐渐升高,表明了区域风沙活动逐渐加强,入湖径流逐渐减小,指示了区域干旱化的趋势.
英文摘要	Lacustrine sediment samples from QTLO1 section of Qingtu lake in NW Tengger Desert, pretrealed by removing the organic matter and carbonate, are measured by Malvern 2000. Standard deviations are calculated for samples from the depth of 214 ~ 560cm of QTL01 section, and grain size components sensitive to environment are obtained. The result from our study suggests that the content of 60～550 m component is sensitive to local eolian activity and the content variation of <60 m component indicates the changes of river discharges drained into the lake. Based on the grain size analysis and C dating, we reconstructed the variations of eolian activity and environment of the studied area during 10 ~2. 5Cal kaBP; From 10 to 7. 8Cal kaRP, gradually decreasing eolian activity indicated the area was becoming humid during the early Holocene; From 7.8 to 7. 5Cal kaBP, veiy intense eolian activity suggested a regional dry event; From 7. 5 to 5Cal kaBP, weak eolian activity indicated a very humid environment; From 5 to 2. 5 Cal kaBP, the gradually weaker eolian activity showed a trend toward aridity in ihe study area.
中文关键词	腾格里沙漠 ; 湖泊沉积物 ; 粒度 ; 风沙活动
英文关键词	Tenggeri desert lacustrine sediment grain size eolian activity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2909201
来源机构	中国科学院西北生态环境资源研究院 ; 兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220734
作者单位	1.中国科学院青海盐湖研究所, 西宁 810008; 2.兰州大学,资源环境学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	隆浩,王乃昂,马海州,等. 腾格里沙漠西北缘湖泊沉积记录的区域风沙特征[J]. 中国科学院西北生态环境资源研究院, 兰州大学,2007,25(4):626-631.
APA	隆浩,王乃昂,马海州,&李育.(2007).腾格里沙漠西北缘湖泊沉积记录的区域风沙特征.,25(4),626-631.
MLA	隆浩,et al."腾格里沙漠西北缘湖泊沉积记录的区域风沙特征".25.4(2007):626-631.