Abstract
| 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 | |
| Publication status | Published - Jun 2018 |
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Keywords
- black shales
- geochemistry
- Neoproterozoic
- atmospheric oxygentation
- selenium
Cite this
Tellurium, selenium and cobalt enrichment in Neoproterozoic black shales, Gwna Group, UK : Deep marine trace element enrichment during the Second Great Oxygenation Event. / Armstrong, Joseph G T; Parnell, John; Bullock, Liam A; Perez, Magali; Boyce, Adrian; Feldmann, Jörg.
In: Terra Nova, Vol. 30, No. 3, 06.2018, p. 244-253.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Tellurium, selenium and cobalt enrichment in Neoproterozoic black shales, Gwna Group, UK
T2 - Deep marine trace element enrichment during the Second Great Oxygenation Event
AU - Armstrong, Joseph G T
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
VL - 30
SP - 244
EP - 253
JO - Terra Nova
JF - Terra Nova
SN - 0954-4879
IS - 3
ER -