Levels of Hg and other chemical elements in volcanic ash fall samples erupted from Mt. Sakurajima, Japan

Ohki, Akira; Nakajima, Tsunenori; Hayashi, Kentaro; Taniguchi, H.; Haraguchi, K.; Takanashi, Hirokazu

doi:10.1080/02772248.2016.1139117

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…The undated ash samples collected from a historical pit at Augustine Volcano (Table 1) were also found to have similar Hg concentrations as the 2006 eruption, suggesting that Augustine Volcano's low-Hg emissions have persisted across multiple eruption cycles. Similarly, ash samples collected and analyzed for PBM from two eruptions from Sakurajima volcano (Japan, 1985 and2010;Ohki et al, 2016) were found to be within the same range, further supporting this idea. Conversely, two sets of proximal samples from Aso volcano (Japan, Marumoto et al, 2017) collected during phreatic and magmatic (Strombolian) eruptions were found to have PBM concentrations that differed by two orders of magnitude (Table 3).…”

Section: Mercury Variation Across Volcanoesmentioning

confidence: 54%

Estimates of volcanic mercury emissions from Redoubt Volcano, Augustine Volcano, and Mount Spurr eruption ash

Kushner

Lopez²,

Wallace³

et al. 2023

Front. Earth Sci.

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Ash is a potential sink of volcanically sourced atmospheric mercury (Hg), and the concentration of particle-bound Hg may provide constraints on Hg emissions during eruptions. We analyze Hg concentrations in 227 bulk ash samples from the Mount Spurr (1992), Redoubt Volcano (2009), and Augustine Volcano (2006) volcanic eruptions to investigate large-scale spatial, temporal, and volcanic-source trends. We find no significant difference in Hg concentrations in bulk ash by distance or discrete eruptive events at each volcano, suggesting that in-plume reactions converting gaseous Hg0 to adsorbed Hg2+ are happening on shorter timescales than considered in this study (minutes) and any additional in-plume controls are not discernable within intra-volcanic sample variability. However, we do find a significant difference in Hg concentration of ash among volcanic sources, which indicates that volcanoes may emit comparatively high or low quantities of Hg. We combine our Hg findings with total mass estimates of ashfall deposits to calculate minimum, first-order Hg emissions of 8.23 t Hg for Mount Spurr (1992), 1.25 t Hg for Redoubt Volcano (2009), and 0.16 t Hg for Augustine Volcano (2006). In particular, we find that Mount Spurr is a high Hg emitting volcano, and that its 1992 particulate Hg emissions likely contributed substantially to the global eruptive volcanic Hg budget for that year. Based on our findings, previous approaches that use long-term Hg/SO2 mass ratios to estimate eruptive total Hg under-account for Hg emitted in explosive events, and global volcanogenic Total Hg estimates need revisiting.

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Section: Mercury Variation Across Volcanoesmentioning

confidence: 54%

Estimates of volcanic mercury emissions from Redoubt Volcano, Augustine Volcano, and Mount Spurr eruption ash

Kushner

Lopez²,

Wallace³

et al. 2023

Front. Earth Sci.

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“…For example, reviews of published data suggest that the leachable Hg content is generally below the sedimentary detection limit (Ayris and Delmelle, 2012;Witham et al, 2005;Stewart et al, 2020). This is despite potential differences in Hg adsorption onto ash as a function of eruption style (Marumoto et al, 2017;Ohki et al, 2016), and suggests that the amount of Hg adsorbed onto ash particles may be insufficient to produce a distinguishable signal. The second factor is the decoupling between Hg and changes in authigenic carbonate content (Text SD3: Early diagenetic processes); which would negate production of a Hg signal in response to a change in Hg drawdown due to the leaching of other reactive compounds from the ash.…”

Section: Text Sd2: Explosive Volcanismmentioning

confidence: 99%

Supplementary material to "Mercury records covering the past 90 kyr from lakes Prespa and Ohrid, SE Europe"

Paine¹,

Fendley²,

Frieling³

et al. 2023

Preprint

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Three sediment cores of >1m length (Co1204, Co1215, Co1216) were recovered from Lake Prespa in 2007 and 2009 using a floating platform (Wagner et al., 2012). A gravity corer was used for undisturbed surface sediments, and a 3-m-long percussion piston corer (UWITEC Co. Austria) was used for deeper sediments. This study presents data for core Co1215 (40 o 57 N, 20 o 58 E), which was recovered from the central northern part of the lake, with a measured water depth of 14.5 m at the time of extraction (October 2009), and hydroacoustic surveys displaying relatively undisturbed sedimentation (Wagner et al., 2012). With a total length of 17.76 m, core Co1215 was cut into segments of up to 1 m length following recovery, and stored in the dark at 4 o C until further processing.One core half was used for non-destructive analyses (e.g., XRF scanning) and then archived at the

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Study of the Chemical Composition of Ash Nanoparticles from the Volcanoes of Kamchatka

2023

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Levels of Hg and other chemical elements in volcanic ash fall samples erupted from Mt. Sakurajima, Japan

Cited by 4 publications

References 21 publications

Estimates of volcanic mercury emissions from Redoubt Volcano, Augustine Volcano, and Mount Spurr eruption ash

Estimates of volcanic mercury emissions from Redoubt Volcano, Augustine Volcano, and Mount Spurr eruption ash

Supplementary material to "Mercury records covering the past 90 kyr from lakes Prespa and Ohrid, SE Europe"

Study of the Chemical Composition of Ash Nanoparticles from the Volcanoes of Kamchatka

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