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
- 595 Downloads
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.
Keywordspeat ombrotrophic mercury isotope industrialization
- 1.Wang H, Hong Y T, Zhu Y Y, et al. Humification degrees of peat in Qinghai-Xizang Plateau and palaeoclimate change. Chinese Sci Bull, 2004, 49: 514–519Google Scholar
- 2.Hong B, Lin Q H, Zhu Y Y, et al. Carbon isotopic composition of the Carex Mulieenisis remain of the Hongyuan peat bog in the eastern plateau and the India Ocean sumer monsoon variation in the Holocean (in Chinese). Bull Mineral Petrol Geochem, 2003, 22: 99–103Google Scholar
- 5.Givelet N, Roos-Barraclough F, Goodsite M E, et al. A 6000-years record of atmospheric mercury accumulation in the high Arctic from peat deposits on Bathurst Island, Nunavut, Canada. J Phys Iv, 2003, 107: 545–548Google Scholar
- 12.Klaminder J, Yoo K, Rydberg J, et al. An explorative study of mercury export from a thawing palsa mire. J Geophys Res-Biogeo, 2008, 113: 1–9Google Scholar
- 30.He G R. Geological features of Hongyuan peat land I and II (in Chinese). Acta Geol Sichuan, 1998, 18: 126–130Google Scholar
- 31.Sun G Y, Luo X Z, Turner E T. A study on peat deposition chronology of Holocene of Zorge Plateau in the Northeast Qinghai-Tibetan Plateau (in Chinese). Acta Sedimentol Sin, 2001, 19: 177–181Google Scholar
- 32.Xu H, Hong Y T, Ling Q H, et al. Temperature variations in the past 6000 years inferred from δ 18O of peat cellulose from Hongyuan, China. Chinese Sci Bull, 2002, 47: 1575–1584Google Scholar
- 34.Tang W C. The environmental geochemical characters and studies of Ruoergai Pasture (in Chinese). Computing Techniques for Geophysical and Geochemical Exploration, 2001, 23: 353–356Google Scholar
- 35.Yu X F, Zhou W J, Lars G F, et al. Grain size characteristics of the Holocene peat sediment in Eastern Tibetan Plateau and its paleoclimatic significance (in Chinese). Acta Sedimentol Sin, 2006, 24: 864–865Google Scholar
- 37.Stetson S J, Gray J E, Wanty R B, et al. Mercury stable isotope variability in ore, mine-waste calcine, and leachates of mine-waste calcine within a historical mercury mining district. Geochim Cosmochim Acta, 2009, 73: A1274Google Scholar
Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.