High-precision measurement of mercury isotope ratios of atmospheric deposition over the past 150 years recorded in a peat core taken from Hongyuan, Sichuan Province, China  

作　　者：SHI WenFang FENG XinBin ZHANG Gan MING LiLi YIN RunSheng ZHAO ZhiQi WANG Jing 

机构地区：[1]The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]The State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

出　　处：《Chinese Science Bulletin》2011年第9期877-882,共6页

基　　金：supported by the National Natural Science Foundation of China (40825011 and 20828008)

摘　　要：High-precision 210Pb dating technology was applied to a peat core with a time span of about 150 years that was taken from Hongyuan, Sichuan Province, China. The concentrations of total mercury (Hg) and stable isotope compositions of mercury in the peat core were measured using a LUMEX 915 instrument and multi-collector inductively coupled plasma mass spectrometer, respectively. Total mercury (Hg) concentrations in the peat core had a clearly increasing trend from the bottom to top of the core while δ 202Hg values (relative to NIST 3133) of peat had a decreasing trend. The total mercury (Hg) concentration varied from 16.7 to 101.3 ng/g and the δ 202Hg values ranged from –0.44‰± 0.14‰ to –1.45‰± 0.22‰. We clearly show that the study area experienced mercury pollution after the industrial revolution, and the mercury emitted from natural sources and anthropogenic sources had different Hg isotope signatures.High-precision ^210Pb dating technology was applied to a peat core with a time span of about 150 years that was taken from Hongyuan, Sichuan Province, China. The concentrations of total mercury （Hg） and stable isotope compositions of mercury in the peat core were measured using a LUMEX 915 instrument and multi-collector inductively coupled plasma mass spectrometer, respectively. Total mercury （Hg） concentrations in the peat core had a clearly increasing trend from the bottom to top of the core while δ^202Hg values （relative to NIST 3133） of peat had a decreasing trend. The total mercury （Hg） concentration varied from 16.7 to 101.3 ng/g and the δ^202Hg values ranged from -0.44%o± 0.14%o to -1.45%o ± 0.22%o. We clearly show that the study area experienced mercury pollution after the industrial revolution, and the mercury emitted from natural sources and anthropogenic sources had different Hg isotope signatures.

关 键 词：泥炭记录 高精度测量 大气汞 四川省 同位素比值 电感耦合等离子体质谱仪 中国 沉降 

分 类 号：P532[天文地球—古生物学与地层学] TH811[天文地球—地质学]