Solan, Strathmore and the back basin play, West of Shetland

Herries, Robert D.; Poddubiuk, R.H.; Wilcockson, P.

doi:10.1144/0050693

Cited by 25 publications

(17 citation statements)

References 10 publications

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“…In the Atlantic Margin region aeolian facies are more limited. In the area west of Shetland locally well-developed aeolian dune intervals are present in an otherwise fluvially dominated succession (Swiecicki et al 1995;Herries et al 1999) and dry aeolian sand sheet facies are locally present within the Corrib Field (Dancer et al 2005, Figure 10). Aeolian facies have generally not been identified in the Central and Northern North Sea basins, although well rounded, millet seed grains in the Lomvi Formation (Nystuen et al 1989) suggest a 'cryptic' aeolian influence where some aeolian reworking of sediment occurred, but never in sufficient quantities to ensure stratigraphic preservation or protection from fluvial reworking.…”

Section: Aeolian Depositsmentioning

confidence: 99%

“…Limited palaeocurrent measurements derived from oriented core from Corrib are indicative of flow to the northeast (Schmid et al 2003(Schmid et al , 2006a, indicating an axial drainage towards the major Arctic rift depocentres to the north. However, west of Shetland this northern Atlantic region shows a differing provenance and palaeocurrent history (Herries et al 1999;Morton et al 2007). The Lower to lower Middle Triassic Otter Bank Sandstone Formation (Figure 3) shows a transverse drainage with provenance from the east.…”

Section: Atlantic Margin Regionmentioning

confidence: 99%

“…2007). Palaeocurrent data from the Foula Sandstone Formation are widely scattered, reflecting highly variable axial and transverse flow directions (Herries et al 1999), with a dominance of eastward drainage from Greenland alternating with axial flow directed towards the south (and episodically to the north). There is no provenance or palaeocurrent evidence of a sustained, northward-flowing river system, and the northward fluvial transport through Corrib clearly did not extend into this area.…”

Section: Atlantic Margin Regionmentioning

confidence: 99%

“…Aeolian reworking of terminal fluvial reaches was common during the Olenikian to Anisian. In the Southern North Sea the hangingwall areas to Hardegsen faults became localized sites of accumulation and preservation of aeolian sands (the so-called 'Fat Sands' in offshore Netherlands block L9, De Jager and Geluk 2007), and both the Ormskirk Sandstone Formation (Meadows and Beach 1993;Meadows 2006) and Otter Bank Sandstone Formation (Herries et al 1999) record a similar style of deposition of tabular sheets of mixed fluvial and aeolian sediment spread over large areas. The mixed fluvial-aeolian Lomvi Formation (Nystuen et al 1989) may also be a record of this episode, although despite apparent similarities with the Otter Bank Sandstone Formation dating of this interval is equivocal (Goldsmith et al 2003;Lervik 2006).…”

Section: Post-hardegsen Lower To Middle Triassicmentioning

confidence: 99%

“…However, fluvial sediment supply from Fennoscandia and the Scottish Highlands persisted in the Central North Sea, Northern North Sea and west of Shetland, reaching the maximum basinward extent in the Central North Sea during this period, albeit within systems which terminated in floodplain and marsh environments (McKie et al in press). Heavy mineral provenance data from the Strathmore field west of Shetland show a marked increase in sand supply from Greenland from the Anisian onwards (Herries et al 1999;Morton et al 2007) which subsumed any input from the Scottish Highlands. In the Central and Northern North Sea areas palaeosols are pervasive, with widespread evidence of plant and animal activity (largely insect burrows), reflecting an overall reduction in aridity or, perhaps more likely, sustained groundwater flow which maintained year-round soil moisture and riparian vegetation.…”

Section: Post-hardegsen Lower To Middle Triassicmentioning

confidence: 99%

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Triassic palaeogeography and fluvial dispersal across the northwest European Basins

2009

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Triassic dryland fluvial systems occur infilling extensional and post-rift basins across northwest Europe. These systems were deposited by streams draining off the major basin margin catchments of Greenland, Fennoscandia, the Scottish Highlands and the remnant Variscan mountains. Fluvial drainage was dominantly endorheic in character, and terminated in playa, aeolian dune, sabkha or marsh settings. Whilst the ambient basin climate fluctuated through varying levels of aridity and humidity, the dispersal of sand into these basins was critically dependant on catchment run-off from the major, basin flanking regions. In the Early Triassic the Tethyan monsoon drove seasonal precipitation over the Variscan mountains which transported sediment northward into arid dune fields and playa. In addition, far-travelled fluvial systems supplied sediment from distant, wetter catchments. Through the Middle and Late Triassic the effects of the Tethyan monsoon apparently weakened, and sand-prone fluvial systems draining off the Variscan mountains were more limited in areal extent, but expanded during pluvial episodes. However, Greenland and Fennoscandia maintained sediment supply from the north, with perennial run-off from Fennoscandia able to maintain marshes and levels of vegetation cover not encountered elsewhere in the region and to episodically drive major exorheic drainage systems into the Tethys Sea. Published climatic simulations are consistent with these observations, which indicate that Greenland, and particularly Fennoscandia, had precipitation levels higher than the regions to the south with a positive precipitation: evaporation balance.

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Section: Aeolian Depositsmentioning

confidence: 99%

Section: Atlantic Margin Regionmentioning

confidence: 99%

Section: Atlantic Margin Regionmentioning

confidence: 99%

Section: Post-hardegsen Lower To Middle Triassicmentioning

confidence: 99%

Section: Post-hardegsen Lower To Middle Triassicmentioning

confidence: 99%

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Triassic palaeogeography and fluvial dispersal across the northwest European Basins

2009

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K‐feldspar sand‐grain provenance in the Triassic, west of Shetland: distinguishing first‐cycle and recycled sediment sources?

et al. 2009

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Sandstone provenance studies can help constrain palaeogeographic reconstructions and ancient drainage system scales and pathways. However, these insights can be obscured by difficulties in geochemically distinguishing or adequately characterizing potential sourcelands, or by failure to identify sedimentary recycling. Triassic basins west of Shetland accumulated ∼2.5 km of sand‐rich sediment. The Middle‐Upper Triassic Foula Formation represents fluvial, aeolian and sabkha facies deposited in the northern interior of the Pangaean supercontinent. Published U‐Pb zircon geochronology and heavy mineral analysis suggest that these sandstones were derived from East Greenland. They contain significant fresh K‐feldspar which is likely to be first cycle and derived directly from its source. Pb isotopic analyses of individual K‐feldspar sand‐grains show a single, unradiogenic Pb population, consistent with the provenance indicated by U‐Pb zircon geochronology. Archaean and Palaeo‐Mesoproterozoic rocks—the Nagssugtoqidian Mobile Belt, the Lewisian Complex or equivalents—are the likely source, with terranes south of the Moine Thrust (Grampian, Caledonian and Variscan) ruled out by both the Pb and U‐Pb data. However, it is not possible to distinguish between rift flank sources to the east and west, as both areas have similar crustal affinity and/or share the same tectonic history. It is possible that the sediment was derived from the West Shetland Platform and not from Greenland. The comparison of provenance signals from robust and less stable mineral phases provides a means of recognizing sedimentary recycling. Robust zircon populations and less stable feldspar in Foula Formation sandstones concur in indicating the same source, suggesting that they are likely to be first cycle. The Triassic sand supply can be contrasted with that in Upper Carboniferous (Namurian) basins in the north of England where a significant zircon population has no corresponding K‐feldspar component. This zircon population is likely to have been recycled from Lower Palaeozoic greywackes from the Southern Uplands Belt or it's along strike extension. Copyright © 2009 John Wiley & Sons, Ltd.

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The Jurassic petroleum system north and west of Britain: a geochemical oil-source correlation study

Scotchman¹,

Griffith²,

Holmes³

et al. 1998

Organic Geochemistry

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Solan, Strathmore and the back basin play, West of Shetland

Cited by 25 publications

References 10 publications

Triassic palaeogeography and fluvial dispersal across the northwest European Basins

Triassic palaeogeography and fluvial dispersal across the northwest European Basins

K‐feldspar sand‐grain provenance in the Triassic, west of Shetland: distinguishing first‐cycle and recycled sediment sources?

The Jurassic petroleum system north and west of Britain: a geochemical oil-source correlation study

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