干旱区生态环境知识资源中心(Arid): 额济纳盆地GN100钻孔不同沉积相的粒度特征

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	额济纳盆地GN100钻孔不同沉积相的粒度特征
其他题名	Grain-size Characteristics of Different Sedimentary Facies from the Core GN100 in the Ejina Basin
	张驰; 曾琳; 张红艳; 韩志勇; 弋双文; 鹿化煜
来源期刊	高校地质学报
ISSN	1006-7493
出版年	2015
卷号	21 期号:4 页码:736-746
中文摘要	内蒙额济纳盆地GN100钻孔的沉积相可划分为河流相、湖泊相、沼泽相及风成砂沉积。对该钻孔不同沉积相代表性沉积物的粒度分析表明:额济纳盆地沉积物的粒度特征能够有效区分沉积环境和动力过程。河流相沉积物主要粒度组分为粗砂,以滚动搬运为主,判别值Y为大于1;风成砂主要粒度组分为细砂,Y值范围主要在0附近;沼泽相也以细砂为主且较风成砂更细,Y值主要为负值且小于风成砂;湖相粒度组分主要为细粉砂,以悬浮搬运为主,但不完全是静水悬浮搬运,相比于静水沉积相对颗粒偏大,而Y最小,为小于-9。这些结果可以为区域沉积环境的准确解释提供参考。
英文摘要	The Ejina basin, located in the arid area in NW China, underwent complicated depositional processes during Quaternary. Based on characteristics of different sedimentary structures, a 18 m long sediment core from the center of the Ejina Basin can be divided into fluvial, aeolian, swamp and lacustrine sediments. The grain-size analysis shows that the depositional environment, transport dynamics in the Ejina basin can be distinguished by characteristic of grain-size distribution. The major grain-size component of fluvial sediment was coarse sand and Y value was greater than 1; the major grain-size component of aeolian sand was fine sand and Y value was close to 0; the major grain-size component of swamp sediment was also fine sand but finer than aeolian sand, with a negative Y values; the major grain-size component of lacustrine sediment was fine silt which was transported by suspension, but different with settle down deposit in standing water, and Y values was less than -9. These results show characters of grain size distribution can be used for distinguishing different transport processes and dynamics, which, in turn, is able to provide critical information for accurate interpretation of the depositional environment change in this area.
中文关键词	额济纳盆地 ; 沉积环境 ; 沉积相 ; 粒度特征
英文关键词	Ejina basin depositional environment sedimentary facies grain-size distribution
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:5597858
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232827
作者单位	南京大学地理与海洋科学学院, 南京, 江苏 210023, 中国
推荐引用方式 GB/T 7714	张驰,曾琳,张红艳,等. 额济纳盆地GN100钻孔不同沉积相的粒度特征[J],2015,21(4):736-746.
APA	张驰,曾琳,张红艳,韩志勇,弋双文,&鹿化煜.(2015).额济纳盆地GN100钻孔不同沉积相的粒度特征.高校地质学报,21(4),736-746.
MLA	张驰,et al."额济纳盆地GN100钻孔不同沉积相的粒度特征".高校地质学报 21.4(2015):736-746.