Tellurium, selenium and cobalt enrichment in Neoproterozoic black shales, Gwna Group, UK: Deep marine trace element enrichment during the Second Great Oxygenation Event

Joseph Armstrong; John Parnell; Liam A Bullock; Magali Perez; Adrian Boyce; Jörg Feldmann

doi:10.1111/ter.12331

Tellurium, selenium and cobalt enrichment in Neoproterozoic black shales, Gwna Group, UK: Deep marine trace element enrichment during the Second Great Oxygenation Event

Joseph Armstrong, John Parnell, Liam A Bullock, Magali Perez, Adrian Boyce, Jörg Feldmann

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Abstract

Black shales of the late Neoproterozoic Gwna Group (570-580 Ma), UK, contain enrichments of tellurium (Te), selenium (Se) and cobalt (Co) relative to average shale compositions. The Te and Co enrichments bear comparison with those of ferromanganese crusts in the modern deep ocean. Gwna Group deposition coincides with the Second Great Oxidation Event, which had a significant effect on trace element fixation globally. Selenium and Te concentrations within these black shales indicate increased continental weathering rates, high biological productivity and corresponding increases in atmospheric O2 concentrations. Cobalt, nickel (Ni) and arsenic (As) enrichments in this succession are secondary mineralisation phases. Demand for many of the trace elements found enriched in the Gwna Group black shales make their mechanisms of accumulation, and variations through the geological record important to understand, and suggests that new resources may be sought based on black shale protoliths from this period.

Original language	English
Pages (from-to)	244-253
Number of pages	10
Journal	Terra Nova
Volume	30
Issue number	3
Early online date	24 Mar 2018
DOIs	https://doi.org/10.1111/ter.12331
Publication status	Published - Jun 2018

Bibliographical note

We are grateful to John Still for his skilled technical support and the ACEMAC facility at the University of Aberdeen. Research funded by NERC grant NE/M010953/1 and NERC facility grant IP-1631-0516. AJB is funded by NERC support of the Isotope Community Support Facility SUERC. The authors thank Eva Stüeken, Ross Large and one anonymous reviewer for their constructive feedback on the original manuscript.

Keywords

black shales
geochemistry
Neoproterozoic
atmospheric oxygentation
selenium

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1111/ter.12331Licence: CC BY

Tellurium, selenium and cobalt enrichment in Neoproterozoic black shales, Gwna Group, UK
© 2018 The Authors. Terra Nova Published by John Wiley & Sons Ltd This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/
Final published version, 2.27 MBLicence: CC BY

Aberdeen Centre for Electron Microscopy, Analysis and Characterisation (ACEMAC):
John Still (Manager)
Geology and Geophysics
Research Facilities: Facility

Cite this

@article{24fa73ffbf994e769a981ec7054521fc,

title = "Tellurium, selenium and cobalt enrichment in Neoproterozoic black shales, Gwna Group, UK: Deep marine trace element enrichment during the Second Great Oxygenation Event",

abstract = "Black shales of the late Neoproterozoic Gwna Group (570-580 Ma), UK, contain enrichments of tellurium (Te), selenium (Se) and cobalt (Co) relative to average shale compositions. The Te and Co enrichments bear comparison with those of ferromanganese crusts in the modern deep ocean. Gwna Group deposition coincides with the Second Great Oxidation Event, which had a significant effect on trace element fixation globally. Selenium and Te concentrations within these black shales indicate increased continental weathering rates, high biological productivity and corresponding increases in atmospheric O2 concentrations. Cobalt, nickel (Ni) and arsenic (As) enrichments in this succession are secondary mineralisation phases. Demand for many of the trace elements found enriched in the Gwna Group black shales make their mechanisms of accumulation, and variations through the geological record important to understand, and suggests that new resources may be sought based on black shale protoliths from this period. ",

keywords = "black shales, geochemistry, Neoproterozoic, atmospheric oxygentation, selenium",

author = "Joseph Armstrong and John Parnell and Bullock, {Liam A} and Magali Perez and Adrian Boyce and J{\"o}rg Feldmann",

note = "We are grateful to John Still for his skilled technical support and the ACEMAC facility at the University of Aberdeen. Research funded by NERC grant NE/M010953/1 and NERC facility grant IP-1631-0516. AJB is funded by NERC support of the Isotope Community Support Facility SUERC. The authors thank Eva St{\"u}eken, Ross Large and one anonymous reviewer for their constructive feedback on the original manuscript.",

year = "2018",

month = jun,

doi = "10.1111/ter.12331",

language = "English",

volume = "30",

pages = "244--253",

journal = "Terra Nova",

issn = "0954-4879",

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T2 - Deep marine trace element enrichment during the Second Great Oxygenation Event

AU - Armstrong, Joseph

AU - Parnell, John

AU - Bullock, Liam A

AU - Perez, Magali

AU - Boyce, Adrian

AU - Feldmann, Jörg

N1 - We are grateful to John Still for his skilled technical support and the ACEMAC facility at the University of Aberdeen. Research funded by NERC grant NE/M010953/1 and NERC facility grant IP-1631-0516. AJB is funded by NERC support of the Isotope Community Support Facility SUERC. The authors thank Eva Stüeken, Ross Large and one anonymous reviewer for their constructive feedback on the original manuscript.

PY - 2018/6

Y1 - 2018/6

N2 - Black shales of the late Neoproterozoic Gwna Group (570-580 Ma), UK, contain enrichments of tellurium (Te), selenium (Se) and cobalt (Co) relative to average shale compositions. The Te and Co enrichments bear comparison with those of ferromanganese crusts in the modern deep ocean. Gwna Group deposition coincides with the Second Great Oxidation Event, which had a significant effect on trace element fixation globally. Selenium and Te concentrations within these black shales indicate increased continental weathering rates, high biological productivity and corresponding increases in atmospheric O2 concentrations. Cobalt, nickel (Ni) and arsenic (As) enrichments in this succession are secondary mineralisation phases. Demand for many of the trace elements found enriched in the Gwna Group black shales make their mechanisms of accumulation, and variations through the geological record important to understand, and suggests that new resources may be sought based on black shale protoliths from this period.

AB - Black shales of the late Neoproterozoic Gwna Group (570-580 Ma), UK, contain enrichments of tellurium (Te), selenium (Se) and cobalt (Co) relative to average shale compositions. The Te and Co enrichments bear comparison with those of ferromanganese crusts in the modern deep ocean. Gwna Group deposition coincides with the Second Great Oxidation Event, which had a significant effect on trace element fixation globally. Selenium and Te concentrations within these black shales indicate increased continental weathering rates, high biological productivity and corresponding increases in atmospheric O2 concentrations. Cobalt, nickel (Ni) and arsenic (As) enrichments in this succession are secondary mineralisation phases. Demand for many of the trace elements found enriched in the Gwna Group black shales make their mechanisms of accumulation, and variations through the geological record important to understand, and suggests that new resources may be sought based on black shale protoliths from this period.

KW - black shales

KW - geochemistry

KW - Neoproterozoic

KW - atmospheric oxygentation

KW - selenium

U2 - 10.1111/ter.12331

DO - 10.1111/ter.12331

M3 - Article

SN - 0954-4879

VL - 30

SP - 244

EP - 253

JO - Terra Nova

JF - Terra Nova

IS - 3

ER -

Tellurium, selenium and cobalt enrichment in Neoproterozoic black shales, Gwna Group, UK: Deep marine trace element enrichment during the Second Great Oxygenation Event

Abstract

Bibliographical note

Keywords

UN SDGs

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