Mercury anomalies across the Palaeocene-Eocene Thermal Maximum

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Mercury anomalies across the Palaeocene-Eocene Thermal Maximum. / Jones, Morgan T.; Percival, Lawrence M.E.; Stokke, Ella W.; Frieling, Joost; Mather, Tamsin A.; Riber, Lars; Schubert, Brian A.; Schultz, Bo; Tegner, Christian; Planke, Sverre; Svensen, Henrik H.

I: Climate of the Past, Bind 15, Nr. 1, 02.2019, s. 217-236.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Jones, MT, Percival, LME, Stokke, EW, Frieling, J, Mather, TA, Riber, L, Schubert, BA, Schultz, B, Tegner, C, Planke, S & Svensen, HH 2019, 'Mercury anomalies across the Palaeocene-Eocene Thermal Maximum', Climate of the Past, bind 15, nr. 1, s. 217-236. https://doi.org/10.5194/cp-15-217-2019

APA

Jones, M. T., Percival, L. M. E., Stokke, E. W., Frieling, J., Mather, T. A., Riber, L., ... Svensen, H. H. (2019). Mercury anomalies across the Palaeocene-Eocene Thermal Maximum. Climate of the Past, 15(1), 217-236. https://doi.org/10.5194/cp-15-217-2019

CBE

Jones MT, Percival LME, Stokke EW, Frieling J, Mather TA, Riber L, Schubert BA, Schultz B, Tegner C, Planke S, Svensen HH. 2019. Mercury anomalies across the Palaeocene-Eocene Thermal Maximum. Climate of the Past. 15(1):217-236. https://doi.org/10.5194/cp-15-217-2019

MLA

Jones, Morgan T. o.a.. "Mercury anomalies across the Palaeocene-Eocene Thermal Maximum". Climate of the Past. 2019, 15(1). 217-236. https://doi.org/10.5194/cp-15-217-2019

Vancouver

Jones MT, Percival LME, Stokke EW, Frieling J, Mather TA, Riber L o.a. Mercury anomalies across the Palaeocene-Eocene Thermal Maximum. Climate of the Past. 2019 feb;15(1):217-236. https://doi.org/10.5194/cp-15-217-2019

Author

Jones, Morgan T. ; Percival, Lawrence M.E. ; Stokke, Ella W. ; Frieling, Joost ; Mather, Tamsin A. ; Riber, Lars ; Schubert, Brian A. ; Schultz, Bo ; Tegner, Christian ; Planke, Sverre ; Svensen, Henrik H. / Mercury anomalies across the Palaeocene-Eocene Thermal Maximum. I: Climate of the Past. 2019 ; Bind 15, Nr. 1. s. 217-236.

Bibtex

@article{1c7b8c0c3b4742e7b614320d9b2cacf2,
title = "Mercury anomalies across the Palaeocene-Eocene Thermal Maximum",
abstract = "Large-scale magmatic events like the emplacement of the North Atlantic Igneous Province (NAIP) are often coincident with periods of extreme climate change such as the Palaeocene-Eocene Thermal Maximum (PETM). One proxy for volcanism in the geological record that is receiving increased attention is the use of mercury (Hg) anomalies. Volcanic eruptions are among the dominant natural sources of Hg to the environment; thus, elevated Hg=TOC values in the sedimentary rock record may reflect an increase in volcanic activity at the time of deposition. Here we focus on five continental shelf sections located around the NAIP in the Palaeogene. We measured Hg concentrations, total organic carbon (TOC) contents, and δ13C values to assess how Hg deposition fluctuated across the PETM carbon isotope excursion (CIE). We find a huge variation in Hg anomalies between sites. The Grane field in the North Sea, the most proximal locality to the NAIP analysed, shows Hg concentrations up to 90 100 ppb (Hg=TOC D 95 700 ppb wt {\%}-1) in the early Eocene. Significant Hg=TOC anomalies are also present in Danish (up to 324 ppb wt {\%}-1) and Svalbard (up to 257 ppb wt {\%}-1) sections prior to the onset of the PETM and during the recovery period, while the Svalbard section also shows a continuous Hg=TOC anomaly during the body of the CIE. The combination with other tracers of volcanism, such as tephra layers and unradiogenic Os isotopes, at these localities suggests that the Hg=TOC anomalies reflect pulses of magmatic activity. In contrast, we do not observe clear Hg anomalies on the New Jersey shelf (Bass River) or the Arctic Ocean (Lomonosov Ridge). This large spatial variance could be due to more regional Hg deposition. One possibility is that phreatomagmatic eruptions and hydrothermal vent complexes formed during the emplacement of sills led to submarine Hg release, which is observed to result in limited distribution in the modern era. The Hg=TOC anomalies in strata deposited prior to the CIE may suggest that magmatism linked to the emplacement of the NAIP contributed to the initiation of the PETM. However, evidence for considerable volcanism in the form of numerous tephra layers and Hg=TOC anomalies post-PETM indicates a complicated relationship between LIP volcanism and climate. Factors such as climate system feedbacks, changes to the NAIP emplacement style, and/or varying magma production rates may be key to both the onset and cessation of hyperthermal conditions during the PETM. However, processes such as diagen esis and organic matter sourcing can have a marked impact on Hg=TOC ratios and need to be better constrained before the relationship between Hg anomalies and volcanic activity can be considered irrefutable.",
author = "Jones, {Morgan T.} and Percival, {Lawrence M.E.} and Stokke, {Ella W.} and Joost Frieling and Mather, {Tamsin A.} and Lars Riber and Schubert, {Brian A.} and Bo Schultz and Christian Tegner and Sverre Planke and Svensen, {Henrik H.}",
year = "2019",
month = "2",
doi = "10.5194/cp-15-217-2019",
language = "English",
volume = "15",
pages = "217--236",
journal = "Climate of the Past",
issn = "1814-9324",
publisher = "Copernicus GmbH",
number = "1",

}

RIS

TY - JOUR

T1 - Mercury anomalies across the Palaeocene-Eocene Thermal Maximum

AU - Jones, Morgan T.

AU - Percival, Lawrence M.E.

AU - Stokke, Ella W.

AU - Frieling, Joost

AU - Mather, Tamsin A.

AU - Riber, Lars

AU - Schubert, Brian A.

AU - Schultz, Bo

AU - Tegner, Christian

AU - Planke, Sverre

AU - Svensen, Henrik H.

PY - 2019/2

Y1 - 2019/2

N2 - Large-scale magmatic events like the emplacement of the North Atlantic Igneous Province (NAIP) are often coincident with periods of extreme climate change such as the Palaeocene-Eocene Thermal Maximum (PETM). One proxy for volcanism in the geological record that is receiving increased attention is the use of mercury (Hg) anomalies. Volcanic eruptions are among the dominant natural sources of Hg to the environment; thus, elevated Hg=TOC values in the sedimentary rock record may reflect an increase in volcanic activity at the time of deposition. Here we focus on five continental shelf sections located around the NAIP in the Palaeogene. We measured Hg concentrations, total organic carbon (TOC) contents, and δ13C values to assess how Hg deposition fluctuated across the PETM carbon isotope excursion (CIE). We find a huge variation in Hg anomalies between sites. The Grane field in the North Sea, the most proximal locality to the NAIP analysed, shows Hg concentrations up to 90 100 ppb (Hg=TOC D 95 700 ppb wt %-1) in the early Eocene. Significant Hg=TOC anomalies are also present in Danish (up to 324 ppb wt %-1) and Svalbard (up to 257 ppb wt %-1) sections prior to the onset of the PETM and during the recovery period, while the Svalbard section also shows a continuous Hg=TOC anomaly during the body of the CIE. The combination with other tracers of volcanism, such as tephra layers and unradiogenic Os isotopes, at these localities suggests that the Hg=TOC anomalies reflect pulses of magmatic activity. In contrast, we do not observe clear Hg anomalies on the New Jersey shelf (Bass River) or the Arctic Ocean (Lomonosov Ridge). This large spatial variance could be due to more regional Hg deposition. One possibility is that phreatomagmatic eruptions and hydrothermal vent complexes formed during the emplacement of sills led to submarine Hg release, which is observed to result in limited distribution in the modern era. The Hg=TOC anomalies in strata deposited prior to the CIE may suggest that magmatism linked to the emplacement of the NAIP contributed to the initiation of the PETM. However, evidence for considerable volcanism in the form of numerous tephra layers and Hg=TOC anomalies post-PETM indicates a complicated relationship between LIP volcanism and climate. Factors such as climate system feedbacks, changes to the NAIP emplacement style, and/or varying magma production rates may be key to both the onset and cessation of hyperthermal conditions during the PETM. However, processes such as diagen esis and organic matter sourcing can have a marked impact on Hg=TOC ratios and need to be better constrained before the relationship between Hg anomalies and volcanic activity can be considered irrefutable.

AB - Large-scale magmatic events like the emplacement of the North Atlantic Igneous Province (NAIP) are often coincident with periods of extreme climate change such as the Palaeocene-Eocene Thermal Maximum (PETM). One proxy for volcanism in the geological record that is receiving increased attention is the use of mercury (Hg) anomalies. Volcanic eruptions are among the dominant natural sources of Hg to the environment; thus, elevated Hg=TOC values in the sedimentary rock record may reflect an increase in volcanic activity at the time of deposition. Here we focus on five continental shelf sections located around the NAIP in the Palaeogene. We measured Hg concentrations, total organic carbon (TOC) contents, and δ13C values to assess how Hg deposition fluctuated across the PETM carbon isotope excursion (CIE). We find a huge variation in Hg anomalies between sites. The Grane field in the North Sea, the most proximal locality to the NAIP analysed, shows Hg concentrations up to 90 100 ppb (Hg=TOC D 95 700 ppb wt %-1) in the early Eocene. Significant Hg=TOC anomalies are also present in Danish (up to 324 ppb wt %-1) and Svalbard (up to 257 ppb wt %-1) sections prior to the onset of the PETM and during the recovery period, while the Svalbard section also shows a continuous Hg=TOC anomaly during the body of the CIE. The combination with other tracers of volcanism, such as tephra layers and unradiogenic Os isotopes, at these localities suggests that the Hg=TOC anomalies reflect pulses of magmatic activity. In contrast, we do not observe clear Hg anomalies on the New Jersey shelf (Bass River) or the Arctic Ocean (Lomonosov Ridge). This large spatial variance could be due to more regional Hg deposition. One possibility is that phreatomagmatic eruptions and hydrothermal vent complexes formed during the emplacement of sills led to submarine Hg release, which is observed to result in limited distribution in the modern era. The Hg=TOC anomalies in strata deposited prior to the CIE may suggest that magmatism linked to the emplacement of the NAIP contributed to the initiation of the PETM. However, evidence for considerable volcanism in the form of numerous tephra layers and Hg=TOC anomalies post-PETM indicates a complicated relationship between LIP volcanism and climate. Factors such as climate system feedbacks, changes to the NAIP emplacement style, and/or varying magma production rates may be key to both the onset and cessation of hyperthermal conditions during the PETM. However, processes such as diagen esis and organic matter sourcing can have a marked impact on Hg=TOC ratios and need to be better constrained before the relationship between Hg anomalies and volcanic activity can be considered irrefutable.

UR - http://www.scopus.com/inward/record.url?scp=85061341605&partnerID=8YFLogxK

U2 - 10.5194/cp-15-217-2019

DO - 10.5194/cp-15-217-2019

M3 - Journal article

AN - SCOPUS:85061341605

VL - 15

SP - 217

EP - 236

JO - Climate of the Past

JF - Climate of the Past

SN - 1814-9324

IS - 1

ER -