Structure of ridges and basins off East Siberia along 81°N, Arctic Ocean

Jokat, Wilfried; Ickrath, Michèle

doi:10.1016/j.marpetgeo.2015.02.047

Cited by 26 publications

(19 citation statements)

References 34 publications

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“…Furthermore, locations were selected indicating appropriate thicknesses and depths feasible for drilling into and through the Cenozoic strata of interest. Depth velocity information for estimating the thickness of the sedimentary units was derived from sonobuoys [62].…”

Section: Prominent Paleogene Events Of Anoxia: Petm Event Elmo Eventmentioning

confidence: 99%

Exploring the long-term Cenozoic Arctic Ocean climate history: a challenge within the International Ocean Discovery Program (IODP)

Stein

Jokat

Niessen

et al. 2015

Arktos

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Section: Prominent Paleogene Events Of Anoxia: Petm Event Elmo Eventmentioning

confidence: 99%

Exploring the long-term Cenozoic Arctic Ocean climate history: a challenge within the International Ocean Discovery Program (IODP)

Stein

Jokat

Niessen

et al. 2015

Arktos

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“…1) [e.g., Laverov et al, 2013;Vernikovsky et al, 2013;Gaina et al, 2014;Pease et al, 2014;Nikishin et al, 2014;Petrov et al, 2016;Drachev, 2016]. Different versions of the stratigraphy of the ocean's sedimentary cover were presented in [Kim, Glezer, 2007;Backman et al, 2008;Bruvoll et al, 2010Bruvoll et al, , 2012Rekant, Gusev, 2012;Mosher et al, 2012;Døssing et al, 2013;Dobretsov et al, 2013;Weigelt et al, 2014;Jokat, Ickrath, 2015;Nikishin et al, 2014;Brumley, 2014;Rekant et al, 2015;Evangelatos, Mosher, 2016]. Large-scale seismic surveys were recently conducted on the shelves of the Laptev, East Siberian and Chukchi Seas, as well as in the deep-water part of the Arctic Ocean Rekant et al, 2015].…”

Section: Introductionmentioning

confidence: 99%

Rift systems of the Russian Eastern Arctic shelf and Arctic deep water basins: link between geological history and geodynamics

Nikishin¹,

Petrov²,

Малышев³

et al. 2017

Geodin. tektonofiz.

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Abstract:In our study, we have developed a new tectonic scheme of the Arctic Ocean, which is based mainly on seismic profiles obtained in the Arctic-2011, Arctic-2012 and Arctic-2014 Projects implemented in Russia. Having interpreted many seismic profiles, we propose a new seismic stratigraphy of the Arctic Ocean. Our main conclusions are drawn from the interpretation of the seismic profiles and the analysis of the regional geological data. The results of our study show that rift systems within the Laptev, the East Siberian and the Chukchi Seas were formed not earlier than Aptian. The geological structure of the Eurasian, Podvodnikov, Toll and Makarov Basins is described in this paper. Having synthesized all the available data on the study area, we propose the following model of the geological history of the Arctic Ocean: 1. The Canada Basin formed till the Aptian (probably, during Hauterivian-Barremian time). 2. During the Aptian-Albian, large-scale tectonic and magmatic events took place, including plume magmatism in the area of the De Long Islands, Mendeleev Ridge and other regions. Continental rifting started after the completion of the Verkhoyansk-Chukotka orogenу, and rifting occurred on the shelf of the Laptev, East Siberian, North Chukchi and South Chukchi basins, and the Chukchi Plateau; simultaneously, continental rifting started in the Podvodnikov and Toll basins. 3. Perhaps the Late Cretaceous rifting continued in the Podvodnikov and Toll basins. 4. At the end of the Late Cretaceous and Paleocene, the Makarov basin was formed by rifting, although local spreading of oceanic crust during its formation cannot be excluded. 5. The Eurasian Basin started to open in the Early Eocene. We, of course, accept that our model of the geological history of the Arctic Ocean, being preliminary and debatable, may need further refining. In this paper, we have shown a link between the continental rift systems on the shelf and the formation history of the Arctic Ocean. Аннотация: На основе российских сейсмических профилей, полученных в рамках проектов Арктика-2011, Арктика-2012 и Арктика-2014, составлена новая тектоническая схема Арктического океана. Приведены ре-зультаты интерпретации многих сейсмических профилей, представлена новая сейсмостратиграфия для Арк-тического океана. Основные выводы сделаны на основе интерпретации сейсмических профилей и на базе анализа региональных геологических данных. Показано, что рифтовые системы в пределах морей Лаптевых, Восточно-Сибирского и Чукотского были образованы не раньше аптского времени. Дано описание геологиче-ского строения бассейнов Евразийского, Подводников, Толля, Макарова и других. На основе синтеза всех дан-ных получена следующая модель истории Арктического океана. 1. Канадский бассейн был образован до апт-ского времени (вероятно, в готериве-барреме). 2. В апте-альбе были крупномасштабные тектонические и магматические события: плюмовый магматизм был в районе поднятия Де-Лонга, на хребте Менделеева и в других областях. Континентальный рифтинг произошел сразу после оконча...

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“…20 km thick crust (e.g., [28]), which led some authors to propose that this is entirely stretched continental crust (e.g., [31]). Other studies suggest that the basin has both oceanic and continental crust, with Jokat and Ickrath [22] suggesting that ca. 50 % of its basement along the 81°N transect is stretched continental crust (note that they refer to the Podvodnikov Basin as the Makarov Basin).…”

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

Ultraslow spreading, ridge relocation and compressional events in the East Arctic region: A link to the Eurekan orogeny?

Gaina

Nikishin

Petrov³

2015

Arktos

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New and available geophysical data from the Eastern Arctic (around the Siberian tip of the Lomonosov Ridge) indicate a change in the tectonic regime at the Eocene time. Oceanic crust identified on the new seismic reflection data in the Amundsen Basin displays an asymmetric fabric also visible in the gravity and magnetic gridded data. Tentative dating of the weak magnetic anomalies suggests asymmetric spreading or ridge relocation from ca. 49 to 33 Ma. Three seismic reflection transects through the Laptev Sea, Lomonosov Ridge and adjacent basins image several compressional features, most likely initiated in the Eocene. According to a regional plate tectonic model, the Greenland plate has pushed the Lomonosov Ridge by ca. 30 mm/year from 54 to 49 Ma and by ca. 13.5 mm/year afterwards, until Early Miocene. We suggest that intraplate stresses triggered by the Eocene to Oligocene northern movement of the Greenland plate and subsequent collision with the North American plate that created the Eurekan deformation, have propagated through the Arctic region and affected part of the East Siberian Shelf, Podvodnikov Basin, Laptev Sea and modified the spreading direction in the eastern Eurasia Basin. We estimate that these changes started at the same time as the peak compressional phase in North Greenland dated 49-47 Ma and lasted until Oligocene time when the large-scale tectonic regime changed by incorporating Greenland into the North American plate.

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Structure of ridges and basins off East Siberia along 81°N, Arctic Ocean

Cited by 26 publications

References 34 publications

Exploring the long-term Cenozoic Arctic Ocean climate history: a challenge within the International Ocean Discovery Program (IODP)

Exploring the long-term Cenozoic Arctic Ocean climate history: a challenge within the International Ocean Discovery Program (IODP)

Rift systems of the Russian Eastern Arctic shelf and Arctic deep water basins: link between geological history and geodynamics

Ultraslow spreading, ridge relocation and compressional events in the East Arctic region: A link to the Eurekan orogeny?

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