2019
DOI: 10.1016/j.scitotenv.2019.01.294
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Late Holocene volcanic and anthropogenic mercury deposition in the western Central Andes (Lake Chungará, Chile)

Abstract: • We studied mercury deposition in Lake Chungará (18°S) over the last 2700 years. • Parinacota volcano produced 20 tephra layers recorded in lake sediments. • Lake primary production was the main, not limiting, carrier of Hg to the sediment. • Volcanoes contributed to~30% of Hg inputs to the lake over the study period. • Last 400 years anthropogenic Hg emissions overwhelmed the volcanic activities.

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Cited by 35 publications
(33 citation statements)
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References 118 publications
(162 reference statements)
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“…Paleoepollution records indicate that the intensification of metallurgy during the past 600 years led to a progressive regional rise in the emission of heavy metals since 1500 AD (Figure 2d-g) (Cooke et al, 2008(Cooke et al, , 2007De Vleeschouwer et al, 2014;Eichler et al, 2017Eichler et al, , 2015Guedron et al, 2019;Hong et al, 2004;Schwanck et al, 2016;Uglietti et al, 2015). By this period (1575 AD-2005 AD) the correlation between paleodemographic and pollution levels increased considerably (Figure 3b; Spearman's rho = 0.67, p < 0.05) compared to Pre-Inca times.…”
Section: Northern Chilementioning
confidence: 94%
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“…Paleoepollution records indicate that the intensification of metallurgy during the past 600 years led to a progressive regional rise in the emission of heavy metals since 1500 AD (Figure 2d-g) (Cooke et al, 2008(Cooke et al, , 2007De Vleeschouwer et al, 2014;Eichler et al, 2017Eichler et al, , 2015Guedron et al, 2019;Hong et al, 2004;Schwanck et al, 2016;Uglietti et al, 2015). By this period (1575 AD-2005 AD) the correlation between paleodemographic and pollution levels increased considerably (Figure 3b; Spearman's rho = 0.67, p < 0.05) compared to Pre-Inca times.…”
Section: Northern Chilementioning
confidence: 94%
“…In fact, most existing paleopollution records concur in indicating that natural background metal concentrations no longer returned since this period but fluctuated around these anthropogenic levels (Figure 2d-g). Central Andean lacustrine records (11°-19°30'°S) show peaks in copperexcess as well as in [Pb], [Ag] and Hg fluxes from ∼900 to 700 cal yrs BP (Figure 2f-g) as silver smelting thrived regionally (Abbott and Wolfe, 2003;Cooke et al, 2008Cooke et al, , 2007Cooke et al, , 2011Guedron et al, 2019). The metal record from the Illimani cap ice-core displays increased enrichment factors for lead and copper at the interval 1500-1000 cal yrs BP (Figure 2d, Eichler et al, 2017Eichler et al, , 2015, whereas modest increases in EFs of Cu and Ag are detected in the Quelccaya ice-core 1150-500 cal yrs BP (Uglietti et al, 2015).…”
Section: Northern Chilementioning
confidence: 99%
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“…Core logging hence led to identify two cryptotephra, which seem to have followed within some decades to centuries the eruption C and further referred as tephra deposits C' and C". We further used high-resolution mercury (Hg) measurements as an additional conformation for the presence of these tephra deposits (Daga et al, 2016;Guédron et al, 2019;Ribeiro Guevara et al, 2010). During volcanic eruptions, the rapid deposition of massive inorganic volcaniclasts (tephras) results in abrupt drops in the Hg concentration profile (down to 0.9 ng g-1) diluting the uninterrupted organic-rich sediment deposits (average THg = 23.7 ± 6.7 ng g-1) that have accumulated Hg from the atmosphere.…”
Section: Identification and Age Of Volcanic-related Layersmentioning
confidence: 99%