北京师范大学学报（自然科学版）2016，Vol.52Issue(1)：97-104,8.DOI:10.16360/j.cnki.jbnuns.2016.01.019
基于年代数据的青藏高原东北部全新世风沙活动研究
Holocene aeolian activity in the northeastern Qinghai-Tibetan Plateau as revealed by dating data
摘要
Abstract
Aeolian deposits are widely distributed in the Northeastern Tibetan Plateau.Dating of the Holocene eolian sedimentary section in Northeastern Plateau was done.Probability density method was used to reconstruct Holocene aeolian activity history.It was found that Early Holocene aeolian activity was strong in the Northeastern Tibetan Plateau,but differences between different spatial scales were also found,mainly between different basins and in internal parts of the Qinghai Lake Basin.Aeolian sand was found to be well-developed in Gonghe Basin,Qaidam Basin and Qinghai Lake area,but Qinghai Lake area also had simultaneous paleosol.Eolian sand layer almost does not appear during this period in the Donggi Cona catchment.Middle Holocene,paleosol is widely developed,aeolian activity is weak,the whole northeast of the Tibetan Plateau has good consistency.Since the late Holocene,aeolian sand has been well-developed in the Qaidam Basin and the Donggi Cona catchment,but paleosol is well-developed in the Gonghe Basin,aeolian sand and paleosol both appear during this period in the Qinghai Lake area.Regional differences in strength of aeolian activity are large, possibly due to local human activities.Aeolian activity intensity is closely related to effective moisture,the higher the effective moisture,the weaker the aeolian activity.Further,Holocene aeolian activity in the Qinghai Lake area and the Donggi Cona catchment is different from aeolian activity in the Qaidam Basin and Gonghe Basin because they have large lakes,interrelation of lake level and humidifying cooling effect of the lake,also and the correlation between lake level and detrital materials mainly originate from lake may be the cause of this phenomenon.Compared to frequency histogram,probability density method of dating has some advantages. This makes full use of the characteristic that dating is subordinate to normal distribution law,reflecting error ranges and accuracies of dating data.关键词
青藏高原/东北部/全新世/风沙活动/年代数据Key words
Qinghai-Tibetan/northeastern/Holocene/aeolian activity/dating data分类
天文与地球科学引用本文复制引用
杜世松,伍永秋,李拓宇,蒿承智,黄文敏..基于年代数据的青藏高原东北部全新世风沙活动研究[J].北京师范大学学报（自然科学版）,2016,52(1):97-104,8.基金项目
国家重点基础研究发展计划基金资助项目(2013CB956001) （2013CB956001）
国家自然科学基金资助项目(41071129) （41071129）
地表过程模型与模拟创新研究群体科学基金资助项目(41321001) （41321001）
