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Mass wasting on the submarine Lomonosov Ridge, central Arctic Ocean
Responsible organisation
2007 (English)In: Marine Geology, ISSN 0025-3227, E-ISSN 1872-6151, Vol. 243, no 1-4, 132-142 p.Article in journal (Refereed) Published
Abstract [en]

A total of seven arcuate transverse troughs 5-6 km wide, 7-9 km long and 150-200 m deep are present on both sides of the crest of the central part of Lomonosov Ridge, Arctic Ocean. The troughs occur within a restricted ridge length of ca. 65 km. Trough morphology and disrupted, piecewise continuous sub-bottom reflections down to a common stratigraphic horizon below the troughs indicate lateral spread of progressively disintegrating sediment blocks above a glide plane. Lomonosov Ridge is aseismic, but the spatially restricted mass waste occurrences suggest sediment instability induced by earthquake loading. Another possibility is a pressure wave from a possible impact of an extraterrestrial object on Alpha Ridge about 500 km away. The slide event(s) is likely to be pre-late Pleistocene as sediment deposition within one of the slide scars appears continuous over the last c. 600 ka. (c) 2007 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2007. Vol. 243, no 1-4, 132-142 p.
Keyword [en]
Arctic Ocean; Lomonosov Ridge; seismic reflection; slide scars; mass wasting
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-3163DOI: 10.1016/j.margeo.2007.04.012OAI: oai:DiVA.org:polar-3163DiVA: diva2:1050057
Available from: 2016-11-28 Created: 2016-11-21 Last updated: 2016-11-28

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