Sedimentology, C-S-Fe relationships and stable isotopic compositions in Devonian black mudrocks, Mackenzie Mountains, Northwest Territories, Canada

Al‐Aasm, Ihsan S.; Morad, S.; Durocher, Scott; Muir, I.D.

doi:10.1016/s0037-0738(96)00018-8

Cited by 15 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The climbing ripple lamination suggests rapid deposition from unidirectional tractional currents with a high suspended load. The lack of wave indicators and the high silt and mud content of the sandstones indicate a high terrigenous component; this supports a fl uvially dominated distal mouth bar setting with fl ows depositing rapidly on exit from updip distributive channels (Al-Aasm et al, 1996;Johannessen and Steel, 2005;Olariu and Bhattacharya, 2006;Enge et al, 2010). The abundance of debrites that interfi nger with climbing ripplelaminated sandstones is interpreted as the product of rapid deposition and incremental collapse of a steep, river-dominated upper delta front.…”

Section: N1 Sectionmentioning

confidence: 91%

Contrast in the process response of stacked clinothems to the shelf-slope rollover

2013

View full text Add to dashboard Cite

Two stacked parasequences exposed continuously along a 35-km dip section in the Permian lower Waterford Formation, Karoo Basin, South Africa, form basin marginscale clinothems, and their internal facies distributions have been mapped out from shelf to upper submarine-slope settings. Sedimentary facies changes have been determined by walking out key surfaces between measured sections. The two parasequences (Waterford clinothems WfC 3 and WfC 4) share progradational profi les, but WfC 3 is characterized by a strong fl uvial infl uence, whereas overlying WfC 4 is a wave-stormdominated delta front system. When correlated basinward, the two clinothems exhibit stratigraphic thickening as well as differing process responses to the increased gradient at the shelf-edge rollover. WfC 3 exhibits synsedimentary, wedge-shaped rotational growth faults. These growth faults trapped sand at the shelf-edge rollover, so minimal sand was delivered to the upper slope; therefore, the clinothem downlaps into the slope mudstones within 7 km of the shelf-edge rollover. In contrast, the top of WfC 4 is marked by closely spaced gullies cut into deformed delta front deposits. The delta front deposits pass into sand-prone slope turbidites 3 km downdip. Locally, these turbidites are truncated by a 60-m-thick turbidite-sandstonefi lled slope channel fi ll. In this case, most of the slope delivery is associated with a wavedominated process regime. It is important to consider the sequence stratigraphic setting of clinothems in such analyses; WfC 4 represents a minimum accommodation point in a depositional sequence and is overlain by a Type 2 sequence boundary. Despite wave and storm dominance, the low accommodation and high sediment supply at that time is interpreted to have driven sand beyond the gullied shelf-edge rollover. Therefore, the delivery of sediment to deep-water settings is governed by parameters other than the presence and proximity of a fl uvial point source, which is heavily advocated in current models for shelf construction.

show abstract

Section: N1 Sectionmentioning

confidence: 91%

Contrast in the process response of stacked clinothems to the shelf-slope rollover

2013

View full text Add to dashboard Cite

show abstract

“…Extensive deposits of organicrich black shales accumulated throughout the Palaeozoic and Mesozoic over North America, Southern Austria, and parts of Europe and Asia (Al-Aasm et al, 1996). These black shales often are metalliferous and may host or are associated with economically important ore deposits, such as famous Triassic "Kupferschiefer" or "marl slate" 0016-7037/$ -see front matter Ó 2010 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

Selenium isotopes trace the source and redox processes in the black shale-hosted Se-rich deposits in China

Wen

Carignan

2011

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

A record of overpressure and Sevier tectonics within beef calcite of the Heath Formation, Central Montana Trough

Washburn,

Sylvester,

Snell

2024

Geochemistry

View full text Add to dashboard Cite

Sedimentology, C-S-Fe relationships and stable isotopic compositions in Devonian black mudrocks, Mackenzie Mountains, Northwest Territories, Canada

Cited by 15 publications

References 31 publications

Contrast in the process response of stacked clinothems to the shelf-slope rollover

Contrast in the process response of stacked clinothems to the shelf-slope rollover

Selenium isotopes trace the source and redox processes in the black shale-hosted Se-rich deposits in China

A record of overpressure and Sevier tectonics within beef calcite of the Heath Formation, Central Montana Trough

Contact Info

Product

Resources

About