Stratigraphic Architecture of a Large-scale Point-bar Complex in the McMurray Formation&lt;subtitle&gt;Syncrude’s Mildred Lake Mine, Alberta, Canada&lt;/subtitle&gt;

Nardin, Thomas R.; Feldman, Howard R.; Carter, B. Joan

doi:10.1306/13371583st643555

Cited by 26 publications

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“…Laramide‐age (<70 ma) zircons are generally absent in northern GoM Mesozoic sediments (Figure 4), but are present in the Albian and Aptian Mannville Group sandstones (McMurray Formation, Alberta, Canada; Leier & Gehrels, 2011). This and other lines of evidence are consistent with this model of dominant Late Mesozoic north‐directed sediment routing (Horner et al, 2019; Hubbard et al, 2011; Martin et al, 2019; Nardin et al, 2013). Jackson et al (2021) present provenance information from the Ripley Sandstone, suggesting that this pattern continued until the late‐Maastrichtian (about‐71 Ma).…”

Section: Discussionsupporting

confidence: 82%

“…These studies show that thick point bars, which represent larger channel depths, correlate to higher discharge and thus larger drainage basins (Xu et al, 2017). In the McMurray Formation of Alberta, Canada (112–125 Ma; Aptian) point bars up to 55 m thick are present in the shallow subsurface (Hubbard et al, 2011; Labrecque, Hubbard, et al, 2011; Labrecque, Jensen, et al, 2011; Nardin et al, 2013). Point bars of this scale indicate high discharge, large channel depths and, most significantly, a very large associated drainage system in northern North America (Horner et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

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Late Mesozoic sandstone volumes recorded in Gulf of Mexico subsurface depocentres: Deciphering long‐term sediment supply trends and contributions by paleo river systems

et al. 2022

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Quantitative assessment of terrigenous sediment flux to the deep basin has mainly been limited to the Cenozoic Era, given challenges with reconstruction of more ancient source to sink systems. Subsurface mapping in the northern Gulf of Mexico basin, where there is a robust database of wells and seismic data, allows estimation of sand-size grain volumes within 12 chronostratigraphically defined Late Mesozoic supersequences. Five subsurface depocentres with thicknesses of >400 m are identified, revealing a history of sediment routing via major fluvial axes (paleo rivers) southward from a mid-continent drainage divide. The interpreted paleo-rivers are further confirmed by compilation and synthesis of published and novel detrital zircon provenance data showing combinations of age peak subsets that vary considerably between depocentres. This study quantifies sediment volumes within each depocentre by inverting porosity over defined gross rock volumes derived from subsurface well | 1271 EAGE SNEDDEN et al.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Late Mesozoic sandstone volumes recorded in Gulf of Mexico subsurface depocentres: Deciphering long‐term sediment supply trends and contributions by paleo river systems

et al. 2022

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“…Lower Cretaceous McMurray Formation, Canada: e.g. Mossop & Flach, 1983; Flach & Mossop, 1985; Smith, 1987a; Fustic et al ., 2008, 2018; Hubbard et al ., 2011; LaBrecque et al ., 2011; Musial et al ., 2012; Nardin et al ., 2012; Jablonski & Dalrymple, 2016; Martinius et al ., 2017; Durkin et al ., 2018; Tang et al ., 2019. Upper Cretaceous Horseshoe Canyon Formation, Canada: Durkin et al ., 2015.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic controls on sedimentary facies of tidal point bars: A case study in the Georgia coastal plain, USA

et al. 2022

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Tidal point bars are commonly developed in coastal plain meandering channels. They form by the same basic processes as fluvial point bars but are further modified by tidal action. This study analyses the sedimentary facies of six active tidal point bars and their relationships. The bars are situated along the Georgia coastal plain, USA, in the lower and upper reaches of the fluvial marine transition and in tidal channels without upstream river input. Based on millimetric logging of 31 cores, nine sedimentary facies were identified, which are proposed to be used for the characterization of tidal point bars in other depositional settings. These bars share common sedimentary facies; however, the internal organization of these facies and their associations differ appreciably in response to complex local tidal processes and fluvial-tidal interactions. The increase in tidal influence results in prominent heterogeneous architectures, with greater concentration of heterolithic stratification (mostly inclined), bioturbation and evidence of flow reversals. In contrast, when freshwater river discharge overcomes tidal stages in the fluvial marine transition bars, structureless coarse-grained facies with attendant erosional surfaces and decreased bioturbation are predominantly developed. In the lower reach of the fluvial marine transition, along the estuarine turbidity maximum, alternations of fluvial and tidal sedimentation are evidenced by a bimodal facies association, where alternations of gravel lag and muddy facies (massive to heterolithic) dominate. Moreover, despite differences in local hydrodynamics, coarsening-upward sequences, mostly composed of structureless coarser facies, are consistently distributed along the upper parts of the bars, which may indicate overprinting of regional events such as storm surge-related floodings in the sedimentological record. This study provides a basis for better identifying the hydrodynamic processes that shape coastal systems, such as estuarine and backbarrier environments. Additionally, those deposits are analogues for certain hydrocarbon reservoirs, thereby increasing knowledge of their facies distribution and aiding production optimization.

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Reconstruction of a sandy point‐bar deposit: implications for fluvial facies analysis

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Hartley

Owen

et al. 2018

Fluvial Meanders and Their Sedimentary Products in the Rock Record

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Stratigraphic Architecture of a Large-scale Point-bar Complex in the McMurray Formation<subtitle>Syncrude’s Mildred Lake Mine, Alberta, Canada</subtitle>

Cited by 26 publications

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Late Mesozoic sandstone volumes recorded in Gulf of Mexico subsurface depocentres: Deciphering long‐term sediment supply trends and contributions by paleo river systems

Late Mesozoic sandstone volumes recorded in Gulf of Mexico subsurface depocentres: Deciphering long‐term sediment supply trends and contributions by paleo river systems

Hydrodynamic controls on sedimentary facies of tidal point bars: A case study in the Georgia coastal plain, USA

Reconstruction of a sandy point‐bar deposit: implications for fluvial facies analysis

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