Reconstruction of three-dimensional eolian dune architecture from one-dimensional core data through adoption of analog data from outcrop

Romain, Hollie G.; Mountney, Nigel P.

doi:10.1306/05201312109

Cited by 22 publications

(23 citation statements)

References 52 publications

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“…This type of interaction tends to be characterised by the accumulation of clay and silt deposits, and potentially of salt if the water salinity is high. The accumulation of such fine-grained or crystalline deposits is important from an applied perspective because elements composed of such material have the potential to form laterally extensive and continuous lowpermeability baffles or barriers to flow in subsurface water aquifers and hydrocarbon reservoirs (e.g., Fryberger et al, 1990;Bloomfield et al, 2006;Bongiolo and Scherer, 2010;McKie et al, 2010;Höyng et al, 2014;Romain and Mountney, 2014).…”

Section: Controls On the Accumulation And Preservation Of Mixed Aeolimentioning

confidence: 99%

A classification scheme for fluvial–aeolian system interaction in desert-margin settings

2015

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Section: Controls On the Accumulation And Preservation Of Mixed Aeolimentioning

confidence: 99%

A classification scheme for fluvial–aeolian system interaction in desert-margin settings

2015

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“…transverse and barchanoid forms) commonly have slipfaces that extend close to the base of the lee slope, and therefore close to the bottom of the preserved set. In such dune types, grainflow facies will tend to be present close to the base of preserved sets (Kocurek and Dott, 1981;Romain and Mountney, 2014).…”

Section: -Grainflow Faciesmentioning

confidence: 99%

Reconstruction of linear dunes from ancient aeolian successions using subsurface data: Permian Auk Formation, Central North Sea, UK

Besly

Romain

Mountney

2018

Marine and Petroleum Geology

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A series of well logs and cores penetrating the predominantly aeolian Auk Formation, Permian Rotliegend Group, Central North Sea, UK, have been evaluated to determine the morphology and style of migratory behaviour of the original dune bedforms, the overall depositional environment, and to assess implications for reservoir heterogeneity. This has been achieved by detailed facies analysis of subsurface datasets and by comparison of the observed sedimentary styles of accumulation to analogous modern aeolian dune fields. Aeolian bedform type, morphology, detailed migratory behaviour, and the nature of the accumulation surface have been interpreted. Analysis of the facies architecture of preserved cross-bedded sets and cosets indicates accumulation on a dry substrate via the migration and climb of large linear bedforms that possessed low-angle inclined lower plinths, up to 15 m thick. Dune plinth elements are dominated by wind-ripple and reworked wind-ripple strata, and were preferentially preserved as successive bedforms migrated over one another at low angles. Packages of grainflow-dominated strata representative of accumulation on the higher part of the bedform lee slope are less common and tend to be preserved mostly in the upper parts of large cosets of strata (~30 m thick). Large linear bedforms were separated by dry interdune areas. Although the primary direction of sand transport was along the elongated crests of the bedforms, a secondary component of transverse motion enabled the lateral migration and preferential preservation of lee-slope deposits that arose from a minor oblique component of bedform migration. In places, the architecture records the preservation of small barchanoid dune deposits, either within interdune depressions or superimposed on the lower flanks of the large linear bedforms. The preserved aeolian facies types exert a primary control on reservoir quality. Few previous studies have documented linear dunes in ancient successions; these findings represent a valuable case example.

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“…While some earlier papers recognized fine-scale pro-to define criteria for distinguishing grainflow, grainfall/suspension and ripple laminae in modern aeolian dunes. Later papers described stratification in subaqueous bedforms (Hunter, 1985b;Hunter & Kocurek, 1986), and these criteria were used to interpret a wide range of cross-bedded deposits (Hunter, 1981;Kocurek & Dott, 1981;Clemmensen & Abrahamsen, 1983;Loope, 1984;Buck, 1985;Kocurek, 1991;Loope et al, 2012;Romain & Mountney, 2014). However, specific depositional processes in some formations, like the Coconino Sandstone, have not been adequately documented.…”

Section: Introductionmentioning

confidence: 99%

“…Additional research is therefore needed to characterize fine-scale facies within the Coconino Sandstone and to interpret associated processes. These small-scale processes will ultimately contribute to larger-scale interpretations as well as models for palaeo-dune morphologies and migration (Kocurek & Dott, 1981;Eastwood et al, 2012;Romain & Mountney, 2014;Cardenas et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of hard‐to‐differentiate dune stratification types in the Permian Coconino Sandstone (Arizona, USA)

2020

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Dune stratification types, which include grainfall, grainflow and ripple lamination, provide a record of the fine-scale processes that deposited sediment on palaeo-dune foresets. While these facies are relatively easy to distinguish in some cross-bedded sandstones, for otherslike the Permian Coconino Sandstone of northern and central Arizonadiscrete stratification styles are hard to recognize at the bedding scale. Furthermore, few attempts have been made to classify fine-scale processes in this sandstone, despite its renown as a classic aeolian dune deposit and Grand Canyon formation. To interpret depositional processes in the Coconino Sandstone, cross-bed facies were characterized using a suite of sedimentary textures and structures. Bedding parameters were described at multiple scales via a combination of field and laboratory methods, including annotated outcrop photomosaics, strike and dip measurements, sandstone disaggregation and laser-diffraction particle analysis, high-resolution scans of thin sections, and scanning electron microscopy. Cross-beds were observed to be laterally extensive along-strike, with most dip angles ranging from the mid-teens to mid-twenties. While some cross-bed sets are statistically coarser near their bases, others exhibit no significant vertical sorting trends. Both massive and laminated textures are visible in high-resolution scans of thin sections, but laminae contacts are commonly indistinct, making normal and reverse grading difficult to define. Diagenetic features, such as stylolite seams and large pores, are also present in some samples and might indicate alteration of original textures like detrital clay laminae and carbonate minerals. Observed textures and sedimentary structures suggest that the cross-beds may consist of grainflow and grainfall deposits, but these remain difficult to differentiate at outcrop and thin-section scales. This characterization of fine-scale processes will play a critical part in the development of depositional models for the Coconino Sandstone and elucidate interpretations for similar cross-bedded formations.

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Reconstruction of three-dimensional eolian dune architecture from one-dimensional core data through adoption of analog data from outcrop

Cited by 22 publications

References 52 publications

A classification scheme for fluvial–aeolian system interaction in desert-margin settings

A classification scheme for fluvial–aeolian system interaction in desert-margin settings

Reconstruction of linear dunes from ancient aeolian successions using subsurface data: Permian Auk Formation, Central North Sea, UK

Characterization of hard‐to‐differentiate dune stratification types in the Permian Coconino Sandstone (Arizona, USA)

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