A submarine fan in the Amundsen Basin, Arctic Ocean

Abstract

Seismic reflection data from drifting ice stations and an icebreaker survey document the presence of a submarine fan along the east flank of the Lomonosov Ridge in the Amundsen Basin, Arctic Ocean. The fan extends from a source area at the North Greenland and Canadian Arctic continental margin to the North Pole. The fan probably developed in response to the combined effect of increased glacial sediment input during the Plio^Pleistocene and topographically confined transport of glacial debris in the deep sea passage between Lincoln Sea margin and the southern end of the Lomonosov Ridge. ß

Chapter 48 Geology and petroleum potential of the Eurasia Basin

“…The primary reservoirs expected for this interval probably are turbidite channel facies emanating from those source areas during times of low sea-level stand. Such systems would be similar to the Plio-Pleistocene turbidite channels described by Kristoffersen et al (2004) in the western part of this AU.…”

“…Continental margin sedimentation ended at about 50 Ma at the time of subsidence and submergence of the Lomonosov Ridge (Jokat et al 1995). Since that time, sediment deposited in the basin consists of hemipelagic and pelagic deposits and distal turbidites derived from source areas in Siberia and Greenland (Jokat & Micksch 2004;Kristoffersen et al 2004). Consequently, younger, flat-lying pelagic and hemipelagic deposits have buried the nascent continental slope and rise deposits and onlap the Lomonosov Ridge continental margin with a thin section of pelagic deposits draping the ridge ( Fig.…”

“…The AU is poorly known because there are no wells and seismic reflection data are limited to a few lines (Jokat et al 1995;Jokat & Micksch 2004;Kristoffersen et al 2004). Sedimentary fill has a maximum sediment thickness of 3200 m close to the Lomonosov Ridge and declines to less than 500 m on the Gakkel Ridge at the southern edge of the AU (Jokat et al 1995;Fig.…”

The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting

“…It is oriented subparallel to the main channel and merges with the latter at 2400 m. Well-developed levees, as observed in other channel systems on glaciated continental margins (e.g. [29,34]), are not present in this setting.…”

“…[29,37,43,44,48,58,71,73]). In this study, we present swath bathymetry and subbottom profiler data from a channel system on the continental slope off NW Svalbard.…”