Lithostratigraphy of the late Early Permian (Kungurian) Wandrawandian Siltstone, New South Wales: record of glaciation?

Thomas, Stephanie G.; Fielding, Christopher R.; Frank, Tracy D.

doi:10.1080/08120090701615717

Cited by 27 publications

(15 citation statements)

References 30 publications

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“…The precise depositional environment of the WHF has been debated (Cisterna & Shi, ; Eyles et al, ; Fielding et al, ; Rygel et al, ; Thomas et al, ; Tye et al, ), but an overall marine nature has been generally accepted. The principal lines of evidence include the occurrence of (a) subaqueous debris‐flow breccias; (b) enormous exotic clasts that must have been dropped from floating ice through a water column; (c) occurrence of HCS and SCS; (d) a widespread though restricted suite of marine trace fossils; and (e) a rich assemblage of marine body fossils including the cold‐climate marine bivalve Eurydesma .…”

Section: Discussionmentioning

confidence: 99%

“…This depositional environment exhibits an interbedding of both wave‐generated structures and unidirectional structures, consistent to a tidally modulated lower shoreface ( sensu Dashtgard et al, ; Dashtgard et al, ). The occurrence of glendonites is indicative of cold sea‐floor environment (Thomas et al, ). The prevalence of distal Cruziana ichnofacies indicates abundance of permanent to semi‐permanent dwellings of deposit‐feeding organisms.…”

Section: Sedimentary Facies Facies Associations and Depositional Enmentioning

confidence: 99%

“…Thin‐bedded mudstone and sandstone couples are interpreted as recording episodic influxes of mud and sand as river‐fed hyperpycnites (Pattison, Ainsworth, & Hoffman, ) and/or storm‐supported gravity flows (Friedrichs & Wright, ; Hampson, ). The cause of the slumping remains controversial with possible mechanisms including abrupt rise of relative sea‐level, increased rates of sedimentation, and seismicity (Thomas et al, ). The occurrence of glendonites is in agreement with glacier action during deposition of the WS and indicate bottom‐water temperatures that were, at least seasonally, near‐freezing (Fielding et al, ; Thomas et al, ).…”

Section: Sedimentary Facies Facies Associations and Depositional Enmentioning

confidence: 99%

“…The cause of the slumping remains controversial with possible mechanisms including abrupt rise of relative sea‐level, increased rates of sedimentation, and seismicity (Thomas et al, ). The occurrence of glendonites is in agreement with glacier action during deposition of the WS and indicate bottom‐water temperatures that were, at least seasonally, near‐freezing (Fielding et al, ; Thomas et al, ).…”

Section: Sedimentary Facies Facies Associations and Depositional Enmentioning

confidence: 99%

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Interplay of tectonism and eustasy during the Early Permian icehouse: Southern Sydney Basin, southeast Australia

et al. 2017

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This investigation presents an outcrop‐based integrated study of sedimentological analysis and sequence stratigraphy applied to the Lower Permian sedimentary succession in the southern Sydney Basin, Australia. This succession accumulated in several depositional environments and sub‐environments that range from non‐marine (fluvial) to marine (outer shelf), representing the fill of a sedimentary basin that resembles a fault‐bounded, rift basin. The stratigraphic analysis indicates a deepening‐upward trend, and the sequence stratigraphic approach has established that these sediments can be attributed to the lowstand, transgressive, and highstand systems tracts. Lowstand sediments can be defined by fluvial facies that are located between the subaerial unconformity and the maximum regressive surface. Transgressive facies correspond to estuarine, upper and lower shoreface, and inner and outer shelf depositional environments and are located between the maximum regressive and the maximum flooding surfaces. Highstand bottomset sediments are accumulated above the maximum flooding surface and are represented by outer shelf facies. The stratigraphic architecture indicates the development of an almost complete depositional sequence, mainly developed under the control of tectonically induced subsidence, but also influenced by the high sedimentation rates and the high gradient of the inherited topography. Eustatic sea‐level fluctuations were of minor importance during the deposition of the examined sediments.

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Section: Discussionmentioning

confidence: 99%

Section: Sedimentary Facies Facies Associations and Depositional Enmentioning

confidence: 99%

Section: Sedimentary Facies Facies Associations and Depositional Enmentioning

confidence: 99%

Section: Sedimentary Facies Facies Associations and Depositional Enmentioning

confidence: 99%

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Interplay of tectonism and eustasy during the Early Permian icehouse: Southern Sydney Basin, southeast Australia

et al. 2017

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“…The outershelf (distal offshore setting) environment is a locus for such decelerated bottom flow regime [64]. The sluggish flow regime enhances the development of lamination, characterized by very distinct, abrupt laminae surfaces of less than 1 mm thick, which contains finer-grained particles than the surrounding deposit [65]. The absence of soft-sediment deformation structures and convolute bedding in Lithofacies F-1 imply that wave loading, episodic, or seismically triggered deposition were not at play in the depositional process of Lithofacies F-1.…”

Section: F-1 Interpretationmentioning

confidence: 99%

Sedimentology and Ichnology of Upper Montney Formation Tight Gas Reservoir, Northeastern British Columbia, Western Canada Sedimentary Basin

Egbobawaye¹

2016

IJG

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Several decades of conventional oil and gas production in Western Canada Sedimentary Basin (WCSB) have resulted in maturity of the basin, and attention is shifting to alternative hydrocarbon reservoir system, such as tight gas reservoir of the Montney Formation, which consists of siltstone with subordinate interlaminated very fine-grained sandstone. The Montney Formation resource play is one of Canada's prime unconventional hydrocarbon reservoir, with reserve estimate in British Columbia (Natural Gas reserve = 271 TCF), Liquefied Natural Gas (LNG = 12,647 million barrels), and oil reserve (29 million barrels). Based on sedimentological and ichnological criteria, five lithofacies associations were identified in the study interval: Lithofacies F-1 (organic rich, wavy to parallel laminated, black colored siltstone); Lithofacies F-2 (very fine-grained sandstone interbedded with siltstone); Lithofacies F-3A (bioturbated silty-sandstone attributed to the Skolithos ichnofacies); Lithofacies F-3B (bioturbated siltstone attributed to Cruziana ichnofacies); Lithofacies F-4 (dolomitic, very fine-grained sandstone); and Lithofacies F-5 (massive siltstone). The depositional environments interpreted for the Montney Formation in the study area are lower shoreface through proximal offshore to distal offshore settings. Rock-Eval data (hydrogen Index and Oxygen Index) shows that Montney sediments contains mostly gas prone Type III/IV with subordinate Type II kerogen, TOC ranges from 0.39 -3.54 wt% with a rare spike of 10.9 wt% TOC along the Montney/Doig boundary. Vitrinite reflectance data and Tmax show that thermal maturity of the Montney Formation is in the realm of "peak gas" generation window. Despite the economic significance of the Montney unconventional "resource-play", however, the location and predictability of the best reservoir interval remain conjectural in part because the lithologic variability of the optimum reservoir lithologies has not been How to cite this paper: Egbobawaye, E.I.

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Provenance and tectonic setting of the Early Permian sedimentary succession in the southern edge of the Sydney Basin, eastern Australia

et al. 2020

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Permian basins formed during a major phase of crustal extension are common throughout eastern Gondwana. One of these basins, the Sydney Basin, has not been subjected to geochemical studies aimed at determining the sedimentary provenance and the tectonic setting. This study provides new geochemical data of the Lower Permian siliciclastic successions in the southern edge of the Sydney Basin. Published petrographic analysis indicates a source area containing sedimentary, felsic volcanic, plutonic, and low-grade metamorphic rocks. Major, trace and rare earth element data suggest that the clastic rocks are geochemically mature and originated from a continental source that has been subjected to moderate to strong weathering. Further, they indicate that most source rocks were of felsic composition and that only the oldest sediments possess a more mafic signature. The provenance data presented in this study, along with published palaeocurrent data, point to the Lachlan orogen being the main source of sediments for the basin. Multi-dimensional discrimination diagrams suggest a continental rift setting and agree with the published sequence stratigraphic framework that suggests a deepening-upward depositional trend associated with tectonic subsidence. This study documents geochemically the provenance of the sedimentary successions within the southern edge of the Sydney Basin and the continental rift origin of the basin.

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Lithostratigraphy of the late Early Permian (Kungurian) Wandrawandian Siltstone, New South Wales: record of glaciation?

Cited by 27 publications

References 30 publications

Interplay of tectonism and eustasy during the Early Permian icehouse: Southern Sydney Basin, southeast Australia

Interplay of tectonism and eustasy during the Early Permian icehouse: Southern Sydney Basin, southeast Australia

Sedimentology and Ichnology of Upper Montney Formation Tight Gas Reservoir, Northeastern British Columbia, Western Canada Sedimentary Basin

Provenance and tectonic setting of the Early Permian sedimentary succession in the southern edge of the Sydney Basin, eastern Australia

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