文献类型：期刊文献

中文题名：内蒙古狼山东麓堆积戈壁表层沉积物粒度特征

英文题名：Grain-size characteristics of surface sediments of the accumulation formed Gobi in eastern piedmont of Langshan Mountain,Inner Mongolia

作者：高君亮[1,2] 吴波[2] 庞营军[2] 苏志珠[3] 哈斯额尔敦[4] 罗凤敏[1] 边凯[1,4]

第一作者：高君亮

机构：[1]中国林业科学研究院沙漠林业实验中心,磴口015200;[2]中国林业科学研究院荒漠化研究所,北京100019;[3]山西大学历史文化学院,太原030006;[4]北京师范大学资源学院,北京100875

年份：2020

卷号：34

期号：11

起止页码：97-103

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2017】；CSSCI:【CSSCI2019_2020】；CSCD:【CSCD2019_2020】；

基金：中央级公益性科研院所基本科研业务费专项资金(CAFYBB2017MB026);国家自然科学基金(41471151);中国科学院沙漠与沙漠化重点实验室开放基金(KLDD-2018-004)资助。

语种：中文

中文关键词：粒度;沉积物;砾石;戈壁;洪积扇

外文关键词：grain-size;sediment;gravel;Gobi desert;diluvial fan

分类号：X144

摘要：采用自然地理学和沉积学研究方法研究了狼山东麓堆积戈壁表层沉积物粒度特征。结果表明:堆积戈壁地表砾石覆盖度介于10.90%~75.81%;从洪积扇扇顶到扇缘,由于物源和搬运堆积的动力条件不同,地表砾石覆盖度降低,沉积物中极粗砾与粗砾减少,中砾与细砾增加;堆积戈壁地表沉积物与下伏沉积物的粒度分布曲线存在明显差异,表明了戈壁地表过程的差异性。堆积戈壁在形成过程中受流水搬运作用与风力作用共同影响,地表细粒物质被侵蚀后残留下砾石,基本上形成了风蚀均衡面。研究结果可为区域戈壁资源的开发利用、防沙治沙和生态环境建设提供基础数据。
The accumulation formed Gobi in the eastern piedmont of Langshan Mountain was taken as objects.By using the research methods of physical geography and sedimentology,surface survey and laboratory measurement,the coverage of grave and grain size characteristics of sediments were analyzed.The main results are as follows:the gravel coverage range from 10.90%to 75.81%,and 57%of sampling sites belong to middle coverage and its coverage is 40%~70%.The differences of gravel coverage on the Gobi mainly depend on its developing topography position;the coverage of gravel from diluvial fan apex to fan margin are decreased.The content of gravel in the surface sediment on the Gobi is high;the particle size distribution curve presents a single kurtosis.The grain size distribution curve of underlying layers is bimodal.The extremely coarse particle and coarse particle in surface sediment decrease significantly and the content of middle gravel and fine gravel increase significantly,while silt clay content changes little from apex to margin of diluvial fan.The formation process of Gobi is related to transportation action of water flow and is affected by wind action,especially the fine material in the unconsolidated layers on the Gobi surface can be eroded and gravels are left.The difference of sediment particle size characteristic parameters at different layers of Gobi surface indicates the difference of Gobi surface process,and the relationships between mean grain size and sorting coefficient,skewness and kurtosis of sediments are significant.The results provide detailed basic data for the development and utilization of Gobi resources,regional desertification control and ecological environment construction.