SASSENDALEN GP
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General information
General information Attribute Value Lithostrat. unit The lithostratigraphic unit's official name.SASSENDALEN GPNPDID lithostrat. unit Norwegian Offshore Directorate's unique id for lithostratigraphic units.140Level Indicates the lithostratigraphic unit's level. Legal values: GROUP, FORMATION, MEMBER.GROUP -
Level below
Level below Lithostrat. unit -
Description
Sassendalen Group
NameThe group is named after a major valley in central Spitsbergen.Type areaSassendalen, central Spitsbergen.ThicknessUp to 700 m in Svalbard, up to 1000 m on the Barents Sea Shelf.LithologyThe Sassendalen Group comprises clastic sediments of Early and Middle Triassic age in Svalbard and on the Barents Sea Shelf. Dominant lithologies are shales and siltstones with subordinate sandstones and minor amounts of carbonate rocks.DistributionThe group is exposed along the Tertiary fold-thrust belt on western Spitsbergen, in central and eastern Spitsbergen, as well as on Barentsøya, Edgeøya, southwestern Nordaustlandet and Bjørnøya. It continues in the subsurface between these islands southwards in the Barents Sea Shelf to the Hammerfest Basin.AgeEarly and Middle Triassic.Depositional environmentThe group represents coastal, deltaic to shallow shelf deposits in western Spitsbergen. These coastal sediments grade eastwards and southwards into shelf mudstones. The upper part is very organic-rich and phosphatic. In the southwestern Barents Sea Shelf shallow to deep shelf sediments were deposited. The Sassendalen Group represents a series of stacked transgressive-regressive successions, each formation being initiated by a regionally significant transgression (Mørk et al. 1989). These successions can also be traced across the Barents Sea Shelf to Arctic Canada and Eastern Siberia (Mørk et al. 1989; Egorov and Mørk, in press).SubdivisionThe subdivision into ten formations reflects the both lateral and vertical facies variations; there are three formations (Vardebukta, Tvillingodden and Bravaisberget formations) on western Spitsbergen, two (Vikinghøgda and Botneheia formations) in central and eastern Svalbard, one (Urd formation) on Bjørnøya, and one ( Steinkobbe Formation ) only documented on the Svalis Dome in the western Barents Sea. Three formations defined in the Hammerfest Basin ( Havert , Klappmyss and Kobbe formations) form the Ingøydjupet Subgroup.Compiled from-
Dallmann, W. K. (ed.) 1999: Lithostratigraphic lexicon of Svalbard. Review and recommendations for nomenclature use. Upper Palaeozoic to Quaternary Bedrock. Norwegian Polar Institute, 318 pp.
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Wellbores penetrating
Wellbores penetrating Wellbore nameWellbore completion dateTop depth [m]Bottom depth [m]15.11.19852285240326.12.19852285240321.07.19862285240307.10.20132203228103.08.20142274230129.10.19851933194520.10.19843962495612.10.19803474357311.09.19812927365716.04.1984485136603.01.20113572363023.08.19862210299319.09.20063006307008.01.20061808259525.11.20061794255023.12.20061868222813.01.20071844218604.01.20131754202601.03.20232683298926.12.2022824188728.09.20171425152520.10.19871893347512.10.20111888281430.12.19882105220007.03.20071206161501.12.20081299175026.02.1994504156908.11.1991488162308.01.2016754189513.05.20051172129507.04.20191083340517.10.20141852189803.05.20151854186514.06.20151927195202.09.20151815183229.09.20151982206410.10.20161982206417.07.20171842190328.08.20172165222708.10.20181904191101.12.20201356156502.08.20161464219510.03.20081890289504.11.20082007265827.02.20142023291814.01.20091856254904.03.20161720294421.08.20082010233819.06.19881642306725.09.20111522366607.08.20131517221019.07.20081694299211.04.19881878387710.11.20142785315226.04.20121513171420.12.19892438430002.02.20012255288107.05.19901595388415.12.19931843387919.07.20211729371103.09.19873362339828.05.20212190251903.11.20132063253519.08.19891607291921.07.20141888286515.06.20191162430001.09.201711681540 -
Wellbores with cores
Wellbores with cores Wellbore nameWellbore completion dateCore length [m]12.10.1980508.01.20062325.11.20063723.12.20061104.01.20132801.03.20235926.12.20225503.05.2015814.06.20152502.09.20151729.09.20154901.12.20202202.08.2016210.03.20081104.11.20083427.02.201416414.01.20091319.06.19881425.09.20114407.08.20137419.07.2008811.04.19883720.12.1989902.02.20013007.05.19901719.08.198933