Cryogenian glaciations on the southern tropical paleomargin of Laurentia (NE Svalbard and East Greenland), and a primary origin for the upper Russøya (Islay) carbon isotope excursion

Hoffman, Paul F.; Halverson, Galen P.; Domack, Eugene W.; Maloof, Adam C.; Swanson‐Hysell, Nicholas L.; Cox, Grant

doi:10.1016/j.precamres.2012.02.018

Cited by 69 publications

(84 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the current work, crystal pseudomorphs are found to be restricted to top of E3, within 10 m of the top at Dracoisen, and in a narrower range at Ditlovtoppen. In contrast, Hoffman et al (2012) showed the pseudomorphs to be distributed in the upper third of E3 in a less well-exposed section in Nordaustlandet to the north of our study area. The pseudomorphs are typically 2-3 mm across and equant, although with a range from obtuse, to right-angled and acute interfacial angles (Fig.…”

Section: The E3-e4 Transition and The Origin Of Mineral Pseudomorphscontrasting

confidence: 86%

“…Fairchild & Herrington, 1989;Cowan & James, 1992). This explanation could also apply to the dolomitized structures identified by Hoffman et al (2012) from a similar horizon in Nordaustlandet to the north of the study area and identified as molar tooth structures which otherwise are not found after initial Cryogenian glaciation locally (Fairchild & Hambrey, 1995) or globally (Kuang, 2014;Shields, 2002.…”

Section: The E3-e4 Transition and The Origin Of Mineral Pseudomorphsmentioning

confidence: 81%

“…At Ditlovtoppen, there is an overlying more variable unit with micritic, locally shaly and brecciated dolomites (C), possibly back-barrier in origin. Further north, in Nordaustlandet, E4 is transitional to a sandstone unit (the Bråvika Sandstone), interpreted as fluvial in origin by Hoffman et al (2012). Deposition of all these units was followed by subaerial exposure and evidence of periglacial conditions: decimetre-scale folds in unit C and extensive development of parallel fracture networks of previously cemented dolomite (Fairchild & Hambrey, 1984).…”

Section: The E3-e4 Transition and The Origin Of Mineral Pseudomorphsmentioning

confidence: 99%

“…However, semi-continuous Cryogenian successions display a clear stratigraphic motif in which two glacial units bound an unambiguously non-glacial interval, representing a mid-Cryogenian interlude of unknown duration (~5-27 My; Rooney et al, 2014). The Neoproterozoic succession of NE Svalbard, formerly contiguous with present-day Northeast Greenland (formerly known as East Greenland; Knoll et al, 1986;Fairchild & Hambrey, 1995;Hoffman et al, 2012), preserves this Cryogenian non-glacial interval.…”

Section: Introductionmentioning

confidence: 99%

“…The intervening mid-Cryogenian non-glacial interval is exposed on the mainland (NE Spitsbergen) and on Nordaustlandet (Fairchild & Hambrey, 1984;Halverson et al, 2004;Hoffman et al, 2012;Riedman et al, 2014;Tahata et al, 2015;Kunzmann et al, 2015). The strata are steeply dipping, but unmetamorphosed and detailed geological maps are given in Hoffman et al (2012) and Fleming (2014, p. 121-122). We redescribe and test the correlations of the well-exposed Spitsbergen outcrops (Figs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

Fairchild

Bonnand²,

Davies

et al. 2016

Precambrian Research

Self Cite

View full text Add to dashboard Cite

General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms At the base of E3, interstratification of cap carbonate with ice-rafted and redeposited glacial sediments occurs. Early diagenetic stabilization of carbonate mineralogy from a precursor, possibly ikaite, to calcite or dolomite is inferred. E3 is predominantly dolomitic silt-shale, with sub-millimetre lamination, lacking sand or current-related sedimentary structures. Thin fine laminae are partly pyritized and interpreted as microbial mats. Dolomite content is 25-50%, with δ 13 C values consistently around +4‰, a value attributed to buffering by dissolution of a precursor metastable carbonate phase. Local calcite cement associates with low δ 13 C values. The carbonates form silt-sized, chemically zoned rhombic crystals from an environment with dynamically changing Fe and Mn. Three-dimensional reconstructions of cm-scale disturbance structures indicate that they represent horizontally directed sock-like folds, developed by release of overpressure into thin surficial sediment overlying an early-cemented layer.A shoaling upwards unit near the top of E3 displays calcium sulphate pseudomorphs in dolomite in the north, but storm-dominated limestones in the south, both being overlain by peritidal oolitic dolomites, exposed under the succeeding Wilsonbreen glacial deposits. There is no Trezona δ 13 C anomaly, possibly implying top-truncation of the succession.Regular 0.5 m-scale sedimentary rhythms, reflecting subtle variations in sediment texture or composition occur throughout E3 and are interpreted as allocyclic. They are thought to be mainly primary in origin, locally modified slightly during early diagenetic cementation. Rhythms are proposed to represent ca. 18 kyr precession cycles, implying 6-8 Myr deposition between glaciations.

show abstract

Section: The E3-e4 Transition and The Origin Of Mineral Pseudomorphscontrasting

confidence: 86%

Section: The E3-e4 Transition and The Origin Of Mineral Pseudomorphsmentioning

confidence: 81%

Section: The E3-e4 Transition and The Origin Of Mineral Pseudomorphsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

Fairchild

Bonnand²,

Davies

et al. 2016

Precambrian Research

Self Cite

View full text Add to dashboard Cite

show abstract

Sub‐ice shelf sediment geochronology utilizing novel radiocarbon methodology for highly detrital sediments

Subt

Yoon

Yoo

et al. 2017

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Sub‐ice shelf sediments near Larsen C ice shelf (LIS‐C) show fine‐scale rhythmic laminations that could provide a near‐continuous seasonal‐resolution record of regional ice mass changes. Despite the great potential of these sediments, a dependable Late Quaternary chronology is difficult to generate, rendering the record incomplete. As with many marginal Antarctic sediments, in the absence of preserved carbonate microfossils, the reliability of radiocarbon chronologies depends on presence of high proportions of autochthonous organic carbon with minimized detrital organic carbon. Consequently, acid insoluble organic (AIO) 14C dating works best where high productivity drives high sediment accumulation rates, but can be problematic in condensed sequences with high proportions of detrital organic carbon. Ramped PyrOx 14C dating has progressively been shown to improve upon AIO 14C dates, to the point of matching foraminiferal carbonate 14C dates, through differential thermochemical degradation of organic components within samples. But in highly detrital sediments, proportions of contemporaneously deposited material are too low to fully separate autochthonous organic carbon from detrital carbon in samples large enough to 14C date. We introduce two modifications of the Ramped PyrOx 14C approach applied to highly detrital sediments near LIS‐C to maximize accuracy by utilizing ultra‐small fractions of the highly detrital AIO material. With minimization of the uncertainty cost, these techniques allow us to generate chronologies for cores that would otherwise go undated, pushing the limits of radiocarbon dating to regions and facies with high proportions of pre‐aged detritus. Wider use of these techniques will enable more coordinated a priori coring efforts to constrain regional glacial responses to rapid warming where sediments had previously been thought too difficult to date.

show abstract

The Marinoan cap carbonate of Svalbard: Syngenetic marine dolomite with ¹⁷O‐anomalous carbonate‐associated sulphate

Fairchild

Bao

Windmill

et al. 2022

The Depositional Record

View full text Add to dashboard Cite

show abstract

Cryogenian glaciations on the southern tropical paleomargin of Laurentia (NE Svalbard and East Greenland), and a primary origin for the upper Russøya (Islay) carbon isotope excursion

Cited by 69 publications

References 91 publications

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

Sub‐ice shelf sediment geochronology utilizing novel radiocarbon methodology for highly detrital sediments

The Marinoan cap carbonate of Svalbard: Syngenetic marine dolomite with ¹⁷O‐anomalous carbonate‐associated sulphate

Contact Info

Product

Resources

About

Cryogenian glaciations on the southern tropical paleomargin of Laurentia (NE Svalbard and East Greenland), and a primary origin for the upper Russøya (Islay) carbon isotope excursion

Cited by 69 publications

References 91 publications

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis

Sub‐ice shelf sediment geochronology utilizing novel radiocarbon methodology for highly detrital sediments

The Marinoan cap carbonate of Svalbard: Syngenetic marine dolomite with 17O‐anomalous carbonate‐associated sulphate

Contact Info

Product

Resources

About

The Marinoan cap carbonate of Svalbard: Syngenetic marine dolomite with ¹⁷O‐anomalous carbonate‐associated sulphate