Stratigraphic evolution of a long-lived submarine channel system in the Late Cretaceous Nanaimo Group, British Columbia, Canada

Bain, Heather; Hubbard, Stephen M.

doi:10.1016/j.sedgeo.2016.03.010

Cited by 67 publications

(93 citation statements)

References 85 publications

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“…This observation is consistent with previous studies, which have shown that valley base is a diachronous surface or a composite erosional surface shaped by multiple erosional events (e.g. Deptuck et al, 2003;Sylvester et al, 2011;Kolla et al, 2012;Thomas and Bodin, 2013;Macauley and Hubbard, 2013;Bain and Hubbard, 2016;Di Celma et al, 2011).…”

Section: Possible Causes For Variations In Channel and Valley Morphologysupporting

confidence: 93%

“…Channels hundreds of meters wide, tens of meters high have been documented, on seismic data in the Gulf of Mexico (Sylvester et al, 2012) and Congo (Deptuck et al, 2007;Jobe et al, 2015), and on bathymetric data from offshore California (Maier et al, 2012). Similar channels have also been documented at outcrops (Brunt et al, 2013;Figueiredo et al, 2013;Gardner et al, 2003;Di Celma et al, 2011;Moody et al, 2012;Bain and Hubbard, 2016). Furthermore, km-wide channels are recorded in the modern Amazon and Zaire fans (Pirmez and Flood, 1995;Babonneau et al, 2002).…”

Section: Scale Comparison With Other Submarine Channel Systemsmentioning

confidence: 86%

“…Stratigraphic elements of multiple scales such as channels, channel complexes and channel complex sets have been comprehensively documented in previous studies (e.g. Gardner and Borer, 2000;Gardner et al, 2003;Abreu et al, 2003;Deptuck et al, 2003;McHargue et al, 2011;Di Celma et al, 2011;Thomas and Bodin, 2013;Bain and Hubbard, …”

Section: Introductionmentioning

confidence: 86%

“…Samuel et al, 2003;Deptuck et al, 2007;Catteral et al, 2010;De Ruig and Hubbard, 2006;Kolla et al, 2012;Jolly et al, 2016), and at outcrops (e.g. Bain and Hubbard, 2016;Grecula et al, 2003). In the Indus fan, the valley can be up to 10 km wide (Deptuck et al, 2003).…”

Section: Scale Comparison With Other Submarine Channel Systemsmentioning

confidence: 99%

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Quantitative seismic geomorphology of a submarine channel system in SE Brazil (Espírito Santo Basin): Scale comparison with other submarine channel systems

Qin

Alves

Constantine

et al. 2016

Marine and Petroleum Geology

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Detailed morphological analyses of a Pleistocene-Holocene submarine channel system in terms of its hierarchical framework, were carried out using a 3D seismic volume from offshore Espírito Santo, SE Brazil. The channel morphology shows marked variations, with five segments (Segments a to e) being identified along its full length. For example, the cross-sectional area of the channel decreases by a factor of 70 from Segment a to Segment c, and is then followed by a nearly four-fold increase from Segment c to Segment d. The significant changes in channel morphology relate to temporal and spatial variations in flow volume within the channel. In the same channel system, the valley reveals three distinct segments (Segments A to C), with similar aspect ratios but marked variations in morphology along the valley distance. Valley morphological changes are chiefly affected by erosional processes. Segment B is characterised by the largest valley-base width, valley width, and cross-sectional area compared to the other two segments. Valley enlargement in Segment B results from relatively high degrees of lateral channel migration and associated cut bank erosion, leading to the widening of the valley, especially the valley base. In Segment C, the valley is characterised by inner bank erosion in the form of shallow-seated mass failures, which only enlarged the upper part of the valley wall. The spatial variations in both channel and valley morphology documented here suggest an important role of local factors (e.g. salt diapirs, tributaries, overbank collapse) in the development of channel systems. Hence, the morphological analyses developed in this work provide an effective tool for studying channels and valleys on continental slopes around the world.

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Section: Possible Causes For Variations In Channel and Valley Morphologysupporting

confidence: 93%

Section: Scale Comparison With Other Submarine Channel Systemsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 86%

Section: Scale Comparison With Other Submarine Channel Systemsmentioning

confidence: 99%

See 2 more Smart Citations

Quantitative seismic geomorphology of a submarine channel system in SE Brazil (Espírito Santo Basin): Scale comparison with other submarine channel systems

Qin

Alves

Constantine

et al. 2016

Marine and Petroleum Geology

View full text Add to dashboard Cite

show abstract

“…The presence of MTDs at the base of channel systems has been documented on both seismic (e.g., Deptuck et al 2003;Mayall et al 2006) and outcrop data (e.g., Macauley and Hubbard 2013;Bain and Hubbard 2016), leading some authors to suggest that seafloor roughness produced by mass-wasting processes can capture and accelerate turbidity flows, facilitating the formation of channels (e.g., Deptuck et al 2003;Gee et al 2007;Abdurrokhim and Ito 2013). In fact, flow-capture processes related to mass wastings have recently been documented in the Gulf of Mexico and the Nile Delta (e.g., Kertznus 2009;Kneller et al 2016).…”

Section: Introductionmentioning

confidence: 99%

The Role of Mass Wasting In the Progressive Development Of Submarine Channels (Espírito Santo Basin, Se Brazil)

Qin

Alves

Constantine

et al. 2017

Journal of Sedimentary Research

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ABSTRACT:A Pliocene-Quaternary submarine channel system, influenced by a localized mass wasting, is investigated in this work using high-resolution 3D seismic data from offshore Espírito Santo Basin, SE Brazil. Three abandoned channels, a channel belt and an mass-transport deposit (MTD) are recognized in the channel system within a confluence region confined by salt diapirs. In this confluence region, the cross-sectional area (CSA) of the channel system can be up to 1.2 km 2 , i.e., 4 to 10 times larger than CSA in other parts of the channel system. Such significant changes in the architecture and morphology of the channel system resulted from the interaction between mass-wasting processes and turbidity flows. We postulate that a basal erosional scar was created by mass-wasting processes and was filled with an MTD. This basal scar was then used as a preferential pathway for turbidity flows, which were captured by its headwall and lateral margins. The interpreted data shows that the captured turbidity flows greatly widened the basal scar, but caused only small modifications in scar height. Part of the MTD within the basal scar was removed downslope by turbidity flows, and was replaced by channel-fill deposits. This paper shows a flow-capture process occurred in a confluence region on continental slope. Basal scars can capture turbidity flows and facilitate flow channelization, which is a key process for submarine-channel initiation. The replacement of MTD by channel-fill deposits has profound implications for reservoir volumes and net-to-gross ratios in channel systems and partly depends on the turbidity-flows properties, such as their erosive ability and frequency. The more erosive and frequent flows are captured by the basal scar, the larger is the accommodation space created for succeeding sand-prone turbidites.

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Detrital zircons from the Nanaimo basin, Vancouver Island, British Columbia: An independent test of Late Cretaceous to Cenozoic northward translation

et al. 2017

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The development of the Cordilleran orogen of western North American is disputed despite a century of study. Paleomagnetic observations require large‐scale dextral displacements of crustal fragments along the western margin of North America, from low latitudes to moderate latitudes during the Cretaceous‐Paleogene. A lack of corroborating geological evidence for large‐scale (>1500 km) displacements has prevented the widespread integration of paleomagnetic data into most contemporary tectonic models for the margin. Here we use detrital zircons from the Nanaimo basin, southwestern British Columbia, Canada as an independent test of its Late Cretaceous paleogeographic position. We compare 4310 detrital zircon U/Pb dates from 16 samples to potential source areas in western North America to test hypothesized northern and southern Late Cretaceous paleogeographic positions. Our detrital zircon data suggest that sediment in the Nanaimo basin derives from either a geographically restricted portion of the Belt‐Purcell basin or the Mojave‐Sonoran region of southwestern North America. A paleogeographic position for the basin adjacent to the Mojave‐Sonoran region is preferred as it is consistent with the paleomagnetic results, but further geological, isotopic, or geophysical data are required to rule out a Belt‐Purcell source.

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Stratigraphic evolution of a long-lived submarine channel system in the Late Cretaceous Nanaimo Group, British Columbia, Canada

Cited by 67 publications

References 85 publications

Quantitative seismic geomorphology of a submarine channel system in SE Brazil (Espírito Santo Basin): Scale comparison with other submarine channel systems

Quantitative seismic geomorphology of a submarine channel system in SE Brazil (Espírito Santo Basin): Scale comparison with other submarine channel systems

The Role of Mass Wasting In the Progressive Development Of Submarine Channels (Espírito Santo Basin, Se Brazil)

Detrital zircons from the Nanaimo basin, Vancouver Island, British Columbia: An independent test of Late Cretaceous to Cenozoic northward translation

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