中文摘要：

根据对巢湖CH1钻孔沉积物进行210Pb比活度测试和粒度、磁学、金属元素分析,在推算沉积速率并建立沉积物年代学标尺的基础上,分析了沉积物金属元素富集与粒度组成和磁学特性间的关系。在对沉积物金属元素含量进行粒度校正后,发现大约自沉积速率推算年代1860s A.D.起,沉积物Cu、Zn元素开始出现非自然水平富集,是化石燃料高温燃烧、金属冶炼与机械制造等人为活动影响所致。这与始自1861年,以生产枪炮、弹药、火轮船为主的中国近代第一个兵工厂———安庆内军械所,在时间上与可能的金属污染性质上是完全一致的,说明巢湖沉积物金属元素的非自然水平富集,是对这一时期区域工业发轫与人类工业活动的沉积响应。

英文摘要：

Sample core CH1 with a length of 141 cm was drilled in the deepest part of Chaohu Lake by the Gravity Impact Core Sampler,and divided into 113 sediment samples in which a set interval is applied to pick about every 1 cm or 2 cm.We carried out the test and analysis of the core CH1 on the specific activity of 210Pb and 137Cs,magnetic parameters,granularities and 14 indicators of metal elements such as Cu,Zn,Al,Fe and so on.Based on the above study,the deposition rate is extrapolated with the specific activity of 210Pb and the chronological surveying rod of the deposit is built,then the relation between the enrichment of metal elements and the characters of granularity ＆ magnetism is analyzed.It is found that there are remarkable correlations between the contents of metal elements such as Cu,Zn,Al,Fe and so on,and the value of clay contents,magnetic susceptibility,SIRM.According to grain-size effect correction of metal element contents with the mean value of metal element contents from the 10 samples at the bottom of core CH1 instead of soil background values of metal element around Chaohu Lake area,it is found that the contents of Cu and Zn in deposit have increased with unnatural levels since the 1860s AD.Based on the extrapolative age of deposition rate,which was closely related with the industrial activity such as the high temperature combustion of fossil fuel,metal smelting and machine facture and so on,it is thought that the result is caused by human activity impacts.This situation,not only temporarily but also in metal pollution characters,coincides with the establishment of Anqing Inner Armory in 1861,the first Chinese arsenal in modern time,which mainly produced firearm,ammunition and steamship.It is indicated that the enrichment of metal elements such as Cu,Zn and so on,with unnatural levels is the sedimentary response to the origin of Chaohu Lake regional industry in modern time and the human industrial activity.