北京师范大学学报（自然科学版）2016，Vol.52Issue(1)：56-62,7.DOI:10.16360/j.cnki.jbnuns.2016.01.013
柴达木盆地不同沉积区灌丛沙堆形态与沉积特征
Morphology and sediments of nabkha in Qaidam Basin
摘要
Abstract
Qaidam Basin of China is a region of strong sandstorm activities.Typical quadrat and sediment sampling of nabkhas in Qaidam Basin was used in the present work.Development background of nabkhas was analyzed by morphology,CaCO3 ,organic matter and particle size.Data indicated good correlations among length,width and altitude of nabkhas,curve fiting showed that nabkhas around the lake was at the growth stage,in the diluvial fan areas was at the mature and stable stage,around the oasis was at the decline stage;geographic conditions and sand source affected nabkhas development.The profile sediments of nebkhas were mainly composed of fine sands in both Zongjiazhen and Xiaxitai,but local mutation phenomenon existed. Mutations of Zongjiazhen may be associated with short weak soil;then mutations of Xiaxitai may be associated with strong sandstorm activities.CaCO3 content and organic matter showed good correlation.As for the high value and the low value,CaCO3 content existed 20~35 cm deeper,results showed that CaCO3 was mainly produced by eluviation and underground water.关键词
灌丛沙堆/形态特征/沉积特征/柴达木盆地Key words
nabkha/morphology/sediments/Qaidam Basin分类
自科综合引用本文复制引用
孔芳芳,谭利华,伍永秋,周丽..柴达木盆地不同沉积区灌丛沙堆形态与沉积特征[J].北京师范大学学报（自然科学版）,2016,52(1):56-62,7.基金项目
国家重点基础研究发展计划基金资助项目(2013CB956001) （2013CB956001）
