Cristin-prosjekt-ID: 2521749
Sist endret: 16. oktober 2021, 00:43

Cristin-prosjekt-ID: 2521749
Sist endret: 16. oktober 2021, 00:43
Prosjekt

Suprabasins – sedimentary response to growth of major extensional fault systems

prosjektleder

Alvar Braathen
ved Seksjon for geologi og geofysikk ved Universitetet i Oslo

prosjekteier / koordinerende forskningsansvarlig enhet

  • Institutt for geofag ved Universitetet i Oslo

Finansiering

  • TotalbudsjettNOK 28.657.000
  • Norges forskningsråd
    Prosjektkode: 295208

Klassifisering

Vitenskapsdisipliner

Geofag

Emneord

Bassengdannelse

Kategorier

Prosjektkategori

  • Grunnforskning

Kontaktinformasjon

Telefon
22856664
Sted
Alvar Braathen

Tidsramme

Avsluttet
Start: 1. januar 2019 Slutt: 1. august 2021

Beskrivelse Beskrivelse

Tittel

Suprabasins – sedimentary response to growth of major extensional fault systems

Populærvitenskapelig sammendrag

Undersøke hvordan avsetningsmiljøer reagerer på store bevegelser i jordskorpen.Mens man har relativ god kunnskap av slik prosser i mindre skala fra ti talls meter til kilometer, er det mindre forstått når bevgelsen kommer opp mot 10 kilomerer i vertikal brevegelse. 

Vitenskapelig sammendrag

Suprabasins – sedimentary response to growth of major extensional fault systemsRifts and rifted margins contain faults with displacements much larger (>10 km) than the half-graben bounding faults normally considered in rift basin studies. The down-dip and lateral evolution of these structures, and the syntectonic basins juxtaposed with them, are only partly understood. The Suprabasin project targets rift-margin highs with internal and fringing basins. Focus is on the development and modification of extensional basins linked to major, long-lived fault zones, with scopes into sedimentary architecture and associated distribution of reservoirs, footwall rebound controlling sedimentary fairways, landscape denudation as temporal sediment source, and burial history of basins. Proposed work is tailored to challenges of the prolific Frøya, Utsira and Loppa1 highs, which represent large, temporally constrained uplifts behind major rift-bounding faults.Research scopes employ the most recent advances in tectonostratigraphic research and are developed in close dialogue with the industry. Petromaks2 compliance are found in exploration and increased recovery, including Arctic areas. There are strong elements of researcher recruitment, industry involvement, optimal management, and user participation as well as interdisciplinary and international cooperation.

Metode

1) Regional structural study to map out the setting of the highs, as a basis for back-stripping (in 3D Move). This forms a basic platform for the other work, as follows,2) Analyse basin configurations and associated fill of the highs and bounding terraces (in many cases substantiated by drilling),3) Unravel subsidence and rebound patterns behind and in the hanging wall of major faults by design and interpretation of composite seismic lines, to shed light on spatio-temporal events of isostatic adjustments,4) Use rebound and subsidence curves as a basis for recreating former morphology trough time, which allow considerations around erosional budgets and thermal history,5) Identify areas of exposure/erosion, link this information to rebound curves, and explore drainage patterns and possible near-resolution sedimentary sinks (e.g., Utsira and Frøya highs basement lineaments and paleo-valleys, and Loppa High karst systems),6) Apply analogue, high-resolution outcrop data to better predict sediment fairways, rift/basin fill architecture, and their genetic framework (data from WP 3).

Utstyr

Gephysical and Geological data -machine learning- traditionally equipment for geological field work  

prosjektdeltakere

prosjektleder

Alvar Braathen

  • Tilknyttet:
    Prosjektleder
    ved Seksjon for geologi og geofysikk ved Universitetet i Oslo
Aktiv cristin-person

Snorre Olaussen

  • Tilknyttet:
    Prosjektdeltaker
    ved Universitetssenteret på Svalbard
Aktiv cristin-person

Kim Senger

  • Tilknyttet:
    Prosjektdeltaker
    ved Universitetssenteret på Svalbard

Ivar Midtkandal

  • Tilknyttet:
    Prosjektdeltaker
    ved Universitetet i Oslo

Per Terje Osmundsen

  • Tilknyttet:
    Prosjektdeltaker
    ved Norges teknisk-naturvitenskapelige universitet
1 - 5 av 5

Resultater Resultater

Impact of growth faults on mixed siliciclastic-carbonate-evaporite deposits during rift climax and reorganisation—Billefjorden Trough, Svalbard, Norway.

Smyrak-Sikora, Aleksandra; Nicolaisen, Jakob; Braathen, Alvar; Johannessen, Erik P.; Olaussen, Snorre; Stemmerik, Lars. 2021, Basin Research. UNIS, UIO, GEUS, DIVNORSK, ARCEX, ANDREINSTVitenskapelig artikkel

Supradetachment to rift basin transition recorded in continental to marine deposition; Paleogene Bandar Jissah Basin, NE Oman.

Serck, Christopher Sæbø; Braathen, Alvar; Olaussen, Snorre; Osmundsen, Per Terje; Midtkandal, Ivar; van Yperen, Anna Elisabeth; Indrevær, Kjetil. 2020, Basin Research. UNIS, NTNU, UIO, NVEVitenskapelig artikkel

Extensional tectonics rooted in orogenic collapse: Long-lived disintegration of the Semail Ophiolite, Oman.

Braathen, Alvar; Osmundsen, Per Terje. 2020, Geology. NTNU, UIOVitenskapelig artikkel
1 - 3 av 3