Crustal structure and tectonic model of the Arctic region

Петров, О. В.; Morozov, Andrey; Shokalsky, Sergey; Kashubin, Sergey; Artemieva, Irina; Sobolev, Nikolai; Petrov, E. O.; Ernst, Richard E.; Сергеев, С. А.; Smelror, Morten

doi:10.1016/j.earscirev.2015.11.013

Cited by 127 publications

(109 citation statements)

References 90 publications

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“…Others state that the plateau has a continental basement with considerable rifting [Gaina et al, 2014;Pease et al, 2014]. In our opinion, the Alpha-Mendeleev Rise has a continental basement Vernikovsky et al, 2014;Petrov et al, 2016].…”

Section: Geological Structure Of the Alpha-mendeleev Risementioning

confidence: 99%

“…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].…”

Section: Introductionmentioning

confidence: 99%

“…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]. Rocks sampled during dredging and drilling of shallow holes on the Lomonosov and Mendeleev Ridges were studied [Morozov et al, 2013;Vernikovsky et al, 2014;Petrov et al, 2016].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Geological Structure Of the Alpha-mendeleev Risementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…Funck et al (2011) suggested that the Alpha Ridge crust resulted from the "interaction of a Cretaceous plume and a seafloor spreading centre parallel to the Canadian Polar margin". This and other tectonic models for the formation of the Alpha-Mendeleev Ridge are still discussed controversially (summarised by Dove et al, 2010;Funck et al, 2011;Petrov et al, 2016). Alterna tive models include (i) interaction between a mantle plume and seafloor spreading parallel to the Alpha-Mendeleev Ridge, (ii) a hotspot track on oceanic crust, (iii) a magmarich continental margin rifted off the Barents Shelf, and (iv) a submerged block of intruded and underplated continental crust, favoured by Petrov et al (2016).…”

Section: Geological Overview Of the Northeast Canadian Arcticmentioning

confidence: 99%

“…To date, only a very few rock samples provide any information about the composition and/or the age of the Alpha-Mendeleev Ridge basement (Van Wagoner & Robinson, 1985;Jokat, 2003;Andronikov et al, 2008;Jokat et al, 2013Morozov et al, 2013;Sergeev et al, 2013;Mukasa et al, 2015;Petrov et al, 2016). More information about the age and duration of the magmatism can be provided by the better accessible Cretaceous igneous rocks from coastal areas around the Arctic Ocean, which together with the submarine Alpha-Mendeleev Ridge are interpreted to be part of the High Arctic Large Igneous Province (HALIP; Tarduno et al, 1998;Maher, 2001;Drachev & Saunders, 2006).…”

Section: Geological Overview Of the Northeast Canadian Arcticmentioning

confidence: 99%

Multistage Cretaceous magmatism in the northern coastal region of Ellesmere Island and its relation to the formation of Alpha Ridge – evidence from aeromagnetic, geochemical and geochronological data

Estrada¹,

Damaske²,

Henjes‐Kunst³

et al. 2016

NJG

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The poorly studied Alpha-Mendeleev Ridge of the Amerasia Basin of the Arctic Ocean is covered by a large magnetic high and interpreted to be part of the Cretaceous High Arctic Large Igneous Province (HALIP). At the north coast of Ellesmere Island, in the Yelverton Bay area, this characteristic magnetic high overlaps the shelf and the coastal area. Results of aeromagnetic surveys, geological fieldwork, geochronological, geochemical and Sr-Nd isotope analysis were combined to study the tectonic history of this part of the Canadian Polar margin. The basement, consisting of metamorphic rocks of the Pearya Terrane, was strongly affected by HALIP-related magmatism that is responsible for characteristic positive magnetic anomaly patterns. A broad magnetic high that can be traced to the Alpha Ridge covers the shelf and coastal areas of Yelverton Bay. It is caused by a voluminous intrusion into the continental crust at a depth of ca. 6-15 km. A chain of small positive magnetic anomalies crosses Wootton Peninsula from SW to NE and then curves into a NNE-SSW trend. It follows the coastline onshore and offshore and superimposes the southern and eastern margins of the broad magnetic high. On land, the anomaly chain covers fault-bounded outcrops of the Wootton Intrusive Complex (WIC) and the Hansen Point Volcanic Complex (HPVC), indicating that the entire anomaly chain is associated with a volcanogenic sequence. Rhyodacite that forms large parts of the HPVC east and west of Yelverton Bay extruded between c. 104 and 97 Ma (LA-ICP-MS U-Pb zircon ages). It originates from a tholeiitc suite and is probably genetically related to the deep intrusion. The HPVC together with the rhyodacite has an age range of c. 104-74 Ma and includes the mildly alkaline WIC (93-92 Ma). The northern coast of Ellesmere Island shows some characteristic features of a magma-rich rifted margin indicating an extensional evolution parallel to the North American margin between the openings of the Canada Basin and the Eurasian Basin.

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