Delta plains host heavily populated and extensive agricultural areas with strong anthropogenic overprints on the natural evolution of these important landforms. Furthermore, modern delta have formed over a short geological time frame, representing immature end members to ancient counterparts in Earth’s history—it could thus be argued that are poor analogues for deciphering sedimentary rock record. Our present study offers unique insight into controls potential extent deltas by investigation...

Abstract During the Triassic, Barents Sea Basin was gradually filled by a low-gradient prograding alluvial to deltaic plain, sourced from Ural and Caledonian mountain belts in southeast stretching over 1000 km Spitsbergen north. Progradation made possible high sediment yield large trunk river systems on scale of modern continental drainage systems. Analysis six 3D seismic volumes southwest samples Middle Late Triassic Snadd Formation at various locations along an oblique depositional dip...

Present-day catchments adjacent to sedimentary basins may preserve geomorphic elements that have been active through long intervals of time. Relicts ancient in present-day landscapes be investigated using mass-balance models and can give important information about upland landscape evolution reservoir distribution basins. However, such methods are their infancy often difficult apply deep-time settings due later modification.

The Triassic-Jurassic transition marks an important change in the basin configuration of Greater Barents Sea. A contiguous with km-thick sedimentary successions changed into a partitioned uplift west and foreland basins east significant implication for infill history. Our study employs range different high-resolution datasets from distal part which unravels complex pattern differential erosion during this period. We record first time distinct angular unconformities between Upper Triassic...

Abstract The Greater Barents Sea Basin (GBSB) in Arctic Russia and Norway is an intracratonic basin that accommodated enormous amount of sediment during the Triassic. These deposits are up to 4.5 km thick over area 2,500,000 2 , consist marine mudstones mudstone‐rich fluvio‐deltaic topsets with sandstone‐dominated fluvial channels. well‐studied data‐rich, but regional correlation between different parts lacking. Provenance data from adjacent basins have been interpreted imply transport Ural...

The long and narrow island Hopen exposes mainly the Late Triassic De Geerdalen Formation, which is time-equivalent to upper part of Snadd Formation: a proven hydrocarbon reservoir in Barents Sea. Formation on has previously been superficially described regional context suggested represent tidally dominated, paralic coastal plain deposits. Recent sedimentological investigations explain subtle but important variability sedimentary architecture pointing different depositional processes. Tidal...

We used detrital zircon fractions from the Late Triassic to Early Jurassic sedimentary succession in Norwegian Barents Sea constrain role of eastern provenance areas basin infill history Northern Pangea Boreal basin. Geochronological data rocks this reveal ages that are very close biostratigraphically defined maximum depositional age two lowermost intervals: The Norian Rhaetian Fruholmen Formation show U-Pb minimum 208.3 ± 4.2 Ma (discordant by −0.58) and 213.8 5 0.8), Sinemurian Tubåen is...

Abstract In recent years it has become clear that many shallow‐marine heterolithic and mudstone‐dominated successions are deposited as mud belts forming part of subaqueous deltas related to major fluvial sources either upstream or along shore. Here the Havert Formation is presented an ancient example this kind system. The in south‐western Barents Sea represents shelf margin clinoforms consisting predominantly deposits. Sediments were mainly derived from east (Ural Mountains), but a smaller...

The Early to Middle Jurassic Stø Formation (Toarcian Bajocian) was deposited in a relatively shallow (10 s of meter deep) epicontinental sea northern Pangea and represents one the most prolific reservoir intervals Barents Sea basin. It comprises condensed, predominantly marine succession characterized by long hiatuses erosional reworking with several horizons extraformational pebble grade conglomerate. Six distinct facies associations describe sedimentological environments ranging from...

Abstract Clinoform geometries demarcate a relative change from shallow to deeper waters and are therefore routinely used as paleogeography paleobathymetry indicators. Distinct segments of the clinoform surface defined based on their discrete breaks in slope, these points define parameters which describe compare different basins ages. In most cases, slope readily interpreted, but placement various remains mostly subjective not strictly uniform. For with gentle transitions less accentuated...

Abstract Triassic strata in the Greater Barents Sea Basin are important records of geodynamic activity surrounding catchments and sediment transport Arctic basins. This study is first attempt to investigate evolution these source areas through time. Our analysis budgets from subsurface data application BQART approach estimate catchment properties shows that (1) during Lower Triassic, supply was at its peak basin comparable biggest modern-day river systems, which supplied by tectonically...

Abstract Clinoform surfaces are routinely used to mark transitions from shallow waters deep basins. This concept represents a valuable tool for screening potential reservoir intervals in frontier basins where limited data available. Variations the character of clinoform geometries and shoreline shelf‐edge trajectories indicators range different factors, such as palaeobathymetry, changes relative sea‐level sediment supply. Applications conceptual generalized models might, however, lead...

Abstract Shoreface sandstone deposits within the Early Carnian part of Snadd Formation Norwegian Barents Sea can be traced for hundreds kilometres in depositional strike direction and tens depositional‐dip direction. This study uses three‐dimensional seismic attribute mapping two‐dimensional regional profiles to visualize facies these shoreface map their internal stratigraphic architecture at a scale. The are generally elongate but show variable width from north‐east south‐west, which...

Abstract Sedimentary recycling has the potential to obscure source‐to‐sink relationships, provenance interpretations, burial history reconstructions and robust reservoir quality predictions in siliciclastic sedimentary basins. Here, we integrate petrographic cathodoluminescence microtextures with fluid inclusion thermometry quartz overgrowths identify constrain candidate for recycled grains Lower Mesozoic sandstone of western Barents Sea basin. Four diagenetic imprints were recognized as...

A change to more sandstone dominated deposits and increasing condensation across the Triassic-Jurassic boundary is generally associated with improved reservoir quality in Barents Sea.However, spatial temporal changes this interval shows that composition of sediment source, immature sedimentary rocks supplied from east or recycled basin contrast mature arenites south west, affect quality.The regional distribution different sources best constrained southwestern part Sea, hitherto there has...

Opening of the Arctic Ocean has been subject much debate, and placement terranes in Early Mesozoic remains a crucial part this important discussion. Several continental complicate palaeogeographical reconstruction. One such terrane is Crockerland, which inferred to explain sediment distribution throughout Mesozoic. However, Triassic successions basins bear many similarities, common sedimentary source could offer simpler explanation with fewer complications for past configuration Arctic. The...

Abstract Temperature impacts the quality of reservoir and source rocks, thereby representing an important aspect petroleum prospect assessments any basin. This case study Triassic basin Edgeøya, eastern Svalbard, reevaluate earlier burial estimates that were solely based on organic matter maturation data from rich shales. Here, we estimate temperatures using a multi‐method approach: Rock‐Eval pyrolysis parameters, fluid inclusions in diagenetic quartz, inorganic diagenesis signatures...

Abstract The most prolific reservoir package in the SW Barents Sea is currently Upper Triassic–Middle Jurassic Realgrunnen Subgroup, comprising main hydrocarbon accumulations Goliat, Snøhvit and Johan Castberg fields Wisting discovery. interval continues to be target as exploration ventures further into this region. However, varies considerably thickness quality throughout basin, it therefore very important understand how developed what has affected time since was deposited. Here we review...

Abstract The Late Triassic is enigmatic in terms of how terrestrial life evolved: it was the time when new groups arose, such as dinosaurs, lizards, crocodiles and mammals. Also, witnessed a prolonged period extinctions, distinguishing from other great mass extinction events, while gradual rise dinosaurs during Carnian to Norian remains unexplained. Here we show that key extinctions early might have been triggered by major sea‐level changes across largest delta plain Earth's history situated...

Abstract A general shift towards higher mineralogical and textural maturity changes the reservoir character across Triassic–Jurassic transition in southwestern Barents Sea basin (SWBSB), largely affecting hydrocarbon prospectivity region. Petrographic geochronological provenance data presented this paper suggest that from mineralogically immature to mature sandstones initiated during deposition of Norian–Rhaetian Fruholmen Formation, varies with location. Strong contrasts between Formation...