Mass wasting at the Siberian End of Lomonosov Ridge, Arctic Ocean

The Lomonosov Ridge is an 1800 km long continental sliver in the center of the Arctic Ocean. Beside its tectonic relevance it hosts glaciogenic features caused either by deep reaching icebergs or grounded ice shelves as well as indications for mass wasting events. Swath bathymetry data acquired in 2...

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Bibliographic Details
Main Authors: Schlager, Ursula, Jokat, Wilfried, Weigelt, Estella
Format: Conference Object
Language:unknown
Published: 2021
Subjects:
Online Access:https://epic.awi.de/id/eprint/53843/
https://epic.awi.de/id/eprint/53843/1/DGG2021_SubmarineLandslidesLomonosovRidge_72dpi.pdf
https://hdl.handle.net/10013/epic.29d5e899-e497-44fc-bd9a-1ba5d998df64
https://hdl.handle.net/
Description
Summary:The Lomonosov Ridge is an 1800 km long continental sliver in the center of the Arctic Ocean. Beside its tectonic relevance it hosts glaciogenic features caused either by deep reaching icebergs or grounded ice shelves as well as indications for mass wasting events. Swath bathymetry data acquired in 2014 provide an almost complete image of these shallow disturbances from almost 84˚ N to the foot of the Laptev Margin. Twelve arcuate shaped transverse escarpments are present on both sides of the crest at the Siberian termination of Lomonosov Ridge between 81˚ - 84˚ N and 140˚ - 146˚E. Eight of them are 2.1 - 10.2 km wide, 1.7 – 8.2 km long, 125 - 851 m deep, with height of headwall between 58 - 207 m and 0.09 - 7.58 km3 volume of moved sediments. Due to the absence of scientific drill holes, only a tentative seismic stratigraphy has been used for a rough age estimate. The mass wasting events likely happened in a wide time corridor between mid Pliocene and mid Miocene. We will introduce the different geometries and statistics of these mass wasting features.