沉积学报2024，Vol.42Issue(4)：1279-1296,18.DOI:10.14027/j.issn.1000-0550.2022.115
祁连山周边内流区人类活动对表层沉积物的影响
Effects of Human Activities on Surface Sediments in the Endorheic Zone Around the Qilian Mountain
摘要
Abstract
[Objective]Surface sediment proxies indicate modern environmental elements and thus infer paleoenvi-ronmental evolution,but few assessment have been reported on the effect of intensive human activity on sediments,and whether this affects the indication of the climate of the area by surface sediment proxies.[Methods]In this study,456 surface sediments from the Qilian Mountains and surrounding areas were collected and proxies such as to-tal organic nitrogen(TN),total organic carbon(TOC),carbon to nitrogen ratio(C/N),organic carbon isotope(δ13Corg),carbonate carbon isotope(δ13Ccarb)and oxygen isotope(δ18O)were analyzed.Relationships between proxies and elevation,latitude,longitude,temperature and precipitation were examined,and the influence of modern hu-man activity on the paleoenvironmental proxies of surface sediments was explored.[Results and Conclusions]It was found that these proxies in the anthropogenic zone fluctuate significantly in this region and the correlation is sig-nificantly less than in other areas.This suggests that the influence of human activity has changed the indicative mean-ing of paleoenvironmental proxies.Systematic analysis and calculation of the relationship between surface sediments and environmental elements explored the influence of human activities on surface sediments,and clarified the use of proxies as modern environmental indicators.This provides a theoretical basis for the use of paleoenvironmental proxies in sedimentary strata to infer past climatic conditions and to analyze human activities.关键词
祁连山/内流区/表层沉积物/人类活动影响区Key words
Qilian Mountains/endorheic zone/surface sediments/human activity-affected area分类
天文与地球科学引用本文复制引用
高铭君,李育,张占森,周雪如,李海烨,段俊杰,薛雅欣..祁连山周边内流区人类活动对表层沉积物的影响[J].沉积学报,2024,42(4):1279-1296,18.基金项目
第二次青藏高原综合科学考察研究项目(2019QZKK0202) （2019QZKK0202）
国家自然科学基金项目(42077415) （42077415）
中国科学院战略性先导科技专项项目(XDA20100102) （XDA20100102）
111计划(BP0618001)[The Second Tibetan Plateau Scientific Expedition and Research Program(STEP),No.2019QZKK0202 （BP0618001）
National Natural Science Foundation of China,No.42077415 （）
The Strategic Priority Research Program of Chinese Academy of Sciences,No.XDA20100102 （）
The 111 Project,No.BP0618001] （）
