The western Svalbard margin (74°–80°N)

Myhre, Annik M.; Eldholm, Olav

doi:10.1016/0264-8172(88)90019-0

Cited by 99 publications

(50 citation statements)

References 27 publications

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“…A north-south shear zone developed between north Greenland and the western margin of the Barents Shelf, forming a relay system between the Arctic and Atlantic spreading centres (Doré, 1991). A transition to passive continental drifting between North Greenland and the Barents margin, and initiation of the Arctic-Atlantic oceanic connection, probably took place in mid-Cenozoic (Oligocene) times (Myhre and Eldholm, 1988).…”

Section: Summary Of Barents Sea Geologymentioning

confidence: 99%

Barents Sea Geology, Petroleum Resources and Commercial Potential

Doré¹

1995

ARCTIC

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ABSTRACT. Geologically, the Barents Sea is a complex mosaic of basins and platforms. It underwent intracontinental sedimentation from about 240 million years ago to the early Cenozoic, about 60 million years ago, after which it bordered the developing Atlantic and Arctic oceans.Geophysical investigations began during the 1970s, and the first offshore drilling occurred in the early 1980s. In Norwegian waters, drilling has proven 260 -300 billion cubic meters of gas, with minor oil. Most of the reserves are contained in Jurassic sandstones. Exploration problems include the predominance of gas over oil and leakage of hydrocarbons from traps in recent geological time; both are connected with the intense erosion of the Barents Shelf that took place during the Cenozoic. Exploration efforts currently focus on new targets in areas such as the Finnmark Platform, the Nordkapp Basin, the Western Margin, and the area between 74˚30'N and Spitsbergen. Oil accumulations have been discovered in Russian waters offshore from the TimanPechora Basin. However, major sedimentary basins west of Novaya Zemlya have yielded the most significant results. The largest finds include the Stokmanovskaya and Ludlovskaya supergiant gas fields. Stokmanovskaya alone has gas reserves in the order of 2500 billion cubic meters. Seismic surveys have documented a large inventory of untested structures, and further resources are probably present in the disputed area between Norwegian and Russian waters.Options for commercial development of both Norwegian and Russian discoveries are currently being evaluated. These include the possible export of liquefied natural gas from the Norwegian Snøhvit Field to the European market. A consortium has carried out feasibility studies on the Russian Stokmanovskaya Field, and gas export solutions are being evaluated. In general, economic exploitation is hindered by the low price of natural gas, the distance to potential markets, difficult logistics, restricted drilling seasons and environmental concerns.Key words: Arctic Ocean, Barents Sea, hydrocarbon potential, natural gas, Russia, Norway RÉSUMÉ. Du point de vue géologique, la mer de Barents est une mosaïque complexe de bassins et de plates-formes. Elle a subi une sédimentation intracontinentale depuis il y a près de 240 millions d'années jusqu'au cénozoïque inférieur, il y a environ 60 millions d'années, après quoi, elle a bordé les océans Atlantique et Arctique en formation.Des recherches géophysiques ont débuté au cours des années 1970, et le premier forage en mer a eu lieu au début des années 80. Dans les eaux norvégiennes, le forage a révélé des réserves prouvées de 260 à 300 milliards de mètres cubes de gaz, contenant un peu de pétrole. La plupart des réserves sont renfermées dans des grès du jurassique. La prédominance du gaz par rapport au pétrole et la dispersion d'hydrocarbures à partir de pièges formés au cours d'une période géologique récente comptent parmi les problèmes liés à l'exploration; ils sont tous deux reliés à l'érosion intensive de la plate-for...

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Section: Summary Of Barents Sea Geologymentioning

confidence: 99%

Barents Sea Geology, Petroleum Resources and Commercial Potential

Doré¹

1995

ARCTIC

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“…The crustal structure of the interior of the Svalbard Archipelago, its western continental margin, the neighbouring oceanic province and the Knipovich Ridge have been investigated by Guterch et al (1978), Sellevoll et al (1991), Myhre and Eldholm (1988) and Faleide et al (1991). In these studies the lateral resolution of velocities in the seismic refraction data is too limited to provide a detailed image across the continental margin of western Svalbard.…”

Section: Introductionmentioning

confidence: 99%

“…A close spacing of on-and offshore receivers and a dense shot pattern yield the detailed velocity structure of Svalbard's Caledonian terrane configuration (Harland and Wright, 1979), the West Spitsbergen Fold Belt (Steel et al, 1985) as well as the continent-ocean boundary along the Hornsund Lineament (Myhre and Eldholm, 1988;Eiken and Austegard, 1987).…”

Section: Introductionmentioning

confidence: 99%

Crustal structure between the Knipovich Ridge and the Van Mijenfjorden (Svalbard)

Ritzmann¹,

Jokat

Mjelde³

et al. 2002

Marine Geophysical Researches

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The Alfred Wegener Institute of Polar and Marine Research, the University of Bergen and Hokkaido University acquired new seismic refraction data along a transect from the Knipovich Ridge to the inner Van Mijenfjorden in southern Svalbard. A close spacing of on-and offshore receivers and a dense marine shot pattern provide the data for a high resolution p-wave velocity model for geological interpretation. Additional Zone from more distant sources, or originate in the magmatic interaction between the northern Knipovich Ridge and the neighbouring young rifted crust. Oceanic crust each side of the Knipovich Ridge is thin (∼3.5 km) and is characterised by the absence of oceanic layer 3 (3.5/4.1 to 4.7 km s −1 ). The oceanic section exhibits zones of very thin crust (∼1 km) that are interpreted as fracture zones. Beneath these we observed decreased mantle velocities (∼7.3 km s −1 ) indicating probable serpentinization of peridotites along these fracture zones. Thickness variations further provide information about the segmentation and magma supply along the northern Knipovich Ridge.

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“…The subsidence of the Iceland-Faeroe Ridge is poorly known, although it appears to have been a barrier for water circulation during most of the Tertiary and complete sub mergence may not have occurred before the late Miocene (Thiede and Eldholm, 1983). The region between northeast Greenland and northern Svalbard started opening after anomaly 13 time, however final continental separation and initiation of the deepwater exchange may have been achieved much later (Myhre and Eldholm, 1988).…”

Section: Oceanographic Frameworkmentioning

confidence: 99%