Redox condition of the late Neoproterozoic pelagic deep ocean: 57Fe Mössbauer analyses of pelagic mudstones in the Ediacaran accretionary complex, Wales, UK

Sato, Terukazu; Sawaki, Yusuke; Asanuma, Hisashi; Fujisaki, Wataru; Okada, Yoshihiro; Maruyama, Shigenori; Isozaki, Yukio; Shozugawa, Katsumi; Matsuo, Motoyuki; Windley, Brian F.

doi:10.1016/j.tecto.2015.08.002

Cited by 12 publications

(10 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Abundant pyrite occurs in the black shales, basalts and carbonates. Black shale deposition, 570–580 Ma (Sato et al., ), closely followed the Second Great Oxidation Event (GOE2) of the late Neoproterozoic, when atmospheric oxygen concentrations increased from ~10% PAL (present atmospheric level) to 60%–100% PAL (Campbell & Squire, ; Canfield, ) (Figure ). At this time, Wales was situated on the Avalonian landmass, at approximately 30°S latitude (Kawai et al., ).…”

Section: Geological Settingmentioning

confidence: 95%

“…Geological age data provided (Gradstein & Ogg, ) and timings of major oxygenation events shown (Lyons et al., ). Gwna Group black shale depositional range (570–580 Ma) indicated (Sato et al., ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Geological Settingmentioning

confidence: 99%

“…While concentrations of these critical elements are well below ore grade, the extensive nature of shales makes them a potentially large sink of trace elements. We compare the geochemistry of the late Neoproterozoic (Ediacaran), 570–580 Ma (Sato et al., ) Gwna Group black shales, N. Wales (Figure a) to that of modern‐day ferromanganese crusts and assess the wider geological significance of these Precambrian deposits in relation to global atmospheric oxygenation.…”

Section: Introductionmentioning

confidence: 99%

“…(a) Area map of NW Wales, showing distribution of Gwna Group stratigraphy (Adapted from Horák & Evans, ). (b) Generalised Stratigraphic Section of Ediacaran Age, N. Wales (Adapted from Howells, ; Kawai et al., , ) (c) Generalised vertical section of Gwna Group sampled section (Adapted from Sato et al., ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2018

View full text Add to dashboard Cite

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 O 2 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.

show abstract

Section: Geological Settingmentioning

confidence: 95%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Therefore, the western portion of the half-graben, where the area of largest subsidence is expected to be located (Prélat et al 2009, Link 2003, Noda & Toshimitsu 2009, Poyatos-Moré et al 2016, suggests a greater ratio of accommodation for sedimentation during stagnant, poorly oxygenated deep water during the sea-level highstand phase. These conditions favored high biological activity, serving as a source of carbonaceous material (Canfield et al 2007, Sato et al 2015.…”

Section: Tectonics and Basin-fill Historymentioning

confidence: 99%

Tectonics and sedimentation of the central sector of the Santo Onofre rift, north Minas Gerais, Brazil

Costa

Filho

2017

Braz. J. Geol.

View full text Add to dashboard Cite

ABSTRACT:The Santo Onofre Group registers the filling of a Tonian, intracontinental paleo-rift that developed along the northern and central Espinhaço regions. This paper examines this unit in the central Espinhaço region with stratigraphic analysis and U-Pb geochronology, reviewing and dividing into the Canatiba and Rio Peixe Bravo Formations, which include the Barrinha Member. The Canatiba Formation mainly comprises carbon-rich mudstones that were deposited through low-density turbidity flows that alternated with sediment settling under anoxic conditions. The Rio Peixe Bravo Formation consists of a succession of sandstones and minor mudstones, which were deposited through low-to high-density turbidity flows. The Barrinha Member mainly consists of conglomerates and is related to channelized debris flows. Detrital zircon grains show maximum depositional ages of 930 ± 33 Ma and around 865 Ma for the Canatiba and Rio Peixe Bravo Formations, respectively. We interpret the Santo Onofre rifting to be relative younger than that for the Sítio Novo Group and to be a precursor stage of the glacial and post-glacial rift-to-passive margin-related sequences of the Macaúbas Group. The lithostratigraphic term "Macaúbas Supergroup" would be of better use to accommodate the unconformity-bounded Tonian sequences that were related to the Rodinia breakup in the Congo-São Francisco paleocontinent. (Hoffman 1991, Meert 2001. Several phases that involved the breaking of Rodinia occurred, either through passive or active rifting, which were induced by remotely applied tensions (in-plane stress) and mantle plumes, respectively . These processes operated diachronically through a continental mass, and the full disintegration of the continent was complete at the end of the Tonian Period (Hoffman 1991, Cawood et al. 2016. Many rifts were formed before reaching this stage, some of which were aborted, and mafic dyke swarms intruded, which became dispersed in the scattered continents (Chew et al. 2010, Volkert et al. 2015. Investigations of these features have provided a better understanding of the space-temporal evolution of the Rodinia, for reconstructions (Hoffman 1991, Meert 2001. KEYWORDS:The Congo-São Francisco paleocontinent is characterized as one of several fragments of the Rodinia (Hoffman 1991. This paleocontinent encompasses the cover and basement rocks of São Francisco and Congo cratons and their marginal orogenic belts ( Fig. 1; Almeida 1977, Alkmim et al. 1993, Trompette 1994. The Espinhaço mountain range is a remarkable feature that extends with a sub-meridian direction across the entire extent of the Congo-São Francisco paleocontinent. The southern and central Espinhaço range regions integrate the Araçuaí fold and thrust belt as one of the external domains of the Neoproterozoic Araçuaí-West Congo orogen (Almeida 1977, Pedrosa-Soares et al. 1992, while the northern extension occurs along the eastern border of the Paramirim aulacogen, which was partially inverted, and involves the basement in the cover deformation (Schobbenhau...

show abstract

Oscillating redox conditions in the Middle–Late Jurassic Alpine Tethys: Insights from selected geochemical indices and 57Fe Mössbauer spectroscopy

Bąk

Gatlik

et al. 2020

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

Redox condition of the late Neoproterozoic pelagic deep ocean: 57Fe Mössbauer analyses of pelagic mudstones in the Ediacaran accretionary complex, Wales, UK

Cited by 12 publications

References 32 publications

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

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

Tectonics and sedimentation of the central sector of the Santo Onofre rift, north Minas Gerais, Brazil

Oscillating redox conditions in the Middle–Late Jurassic Alpine Tethys: Insights from selected geochemical indices and 57Fe Mössbauer spectroscopy

Contact Info

Product

Resources

About