School of Geography Sciences, South China Normal University, Guangzhou, 510631, China.
Zhuhai Branch of State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University at Zhuhai, Zhuhai, 519087, China.
Environ Geochem Health. 2021 Oct;43(10):3921-3933. doi: 10.1007/s10653-021-00878-2. Epub 2021 Mar 24.
A new Pb-dated record of Hg accumulation derived from a sediment core from a Hg-enriched area in Huguangyan Lake (HGY) in South China is presented. Based on synthetic analyses of multi-proxy records including chemical composition, total organic matter, and grain-size distribution in surface sediments and nearby soil samples, it is inferred that the influx of Hg into the lake is mainly a result of atmospheric deposition, with no or minor hydroclimate-induced lithogenic input from the catchment and limited adsorption effects of organic matter and clay. Significantly enhanced anthropogenic input of Hg started in the early 1900s. Since then, several anomalies of Hg accumulation have been the results of wars or intensified economic activities in China. HGY sediments provide a rare and reliable natural archive for detecting atmospheric Hg deposition, which is closely related to anthropogenic activities.
本文提供了一份来自中国南方虎光岩（HGY）富汞区沉积物芯的 Pb 定年汞积累新记录。通过对表层沉积物和附近土壤样品的多指标记录（包括化学成分、总有机质和粒度分布）的综合分析，推断出汞进入湖泊主要是大气沉降的结果，流域没有或很少有水文气候引起的成岩输入，有机质和粘土的吸附作用有限。人类对汞的输入从 19 世纪初开始显著增加。从那时起，几次汞积累异常是中国战争或经济活动加剧的结果。HGY 沉积物为探测与人类活动密切相关的大气汞沉降提供了一个罕见且可靠的天然档案。
