South Anyui suture, northeast Arctic Russia: Facts and problems

Соколов, С. Д.; Bondarenko, Grigoriy Ye.; Morozov, O. L.; Shekhovtsov, Vladimir A.; Glotov, S.; Ganelin, A. V.; Kravchenko‐Berezhnoy, I. R.

doi:10.1130/0-8137-2360-4.209

Cited by 50 publications

(53 citation statements)

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“…The main collisions were in the Early Cretaceous, and the postcollisional tension and intrusion of granites took place about 118-110 Ma [Parfenov, Kuzmin, 2001;Sokolov et al, 2002;Miller et al, 2008Miller et al, , 2010Kuzmichev, 2009]. A similar history was documented for Alaska [Miller, Hudson, 1991].…”

Section: Data On Formation History Of Mesozoic Orogens On the Islandsmentioning

confidence: 58%

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: Data On Formation History Of Mesozoic Orogens On the Islandsmentioning

confidence: 58%

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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“…This suture zone is buried under the Cretaceous Okhotsk-Chukotka volcanic belt (Tikhomirov et al, 2012). In western Chukotka, the suture is marked by Mesozoic terrigenous turbidite and fragments of ophiolite sequences (Sokolov et al, 2002), but in eastern Chukotka the suture corresponds to the Velmai terrane (Parfenov et al, 1993;Nokleberg et al, 1998;Sokolov et al, 2009). …”

Section: Geological Settingmentioning

confidence: 99%

Petrogenises of Triassic gabbroic and basaltic rocks from Chukotka, NE Russia: Eastern end of the ‘arc–type’ Siberian LIP?

Desta

Ishiwatari

Machi

et al. 2015

Journal of Mineralogical and Petrological Sciences

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The Triassic gabbroic intrusions and associated basaltic lavas from Chukotka are mainly tholeiitic with both ocean island basalt (OIB) and island arc basalt (IAB)-type geochemical signatures. Mg-number [Mg# = 100 × Mg/(Mg + Fe 2+ )] is around 40 for OIB-type gabbros, ranges from 48 to 66 for IAB-type hornblende-rich gabbros, and 43 to 65 for IAB-type basaltic rocks (ankaramites, lamprophyres, pyroxene-phyric basalts and hornblende-phyric basaltic andesite). TiO 2 contents of the IAB-type gabbros and basaltic rocks are low (<2 wt%), but are high in OIB-type gabbros (4.3-5.3 wt%). OIB-type gabbros are typically enriched in FeO * (16-18 wt%) as compared to IAB-type gabbros (10-14 wt%) and IAB-type lavas (ankaramites,~10 wt%; lamprophyres,~14; pyroxene-phyric basalt, 11 wt% and basaltic andesite, 9-10 wt. %). In the primitive mantle normalized trace element patterns, IAB-type basalts and gabbros are characterized by depletion in HFSE (Nb, Ta, Zr and Hf ) and enrichment in LILE. OIB-type gabbros can be distinguished from the rests by the absence of HFSE depletion, with strong negative Sr anomaly. The positive Ti anomaly in the OIB-type gabbros can be attributed to high content of ilmenite in these rocks. Trace element characteristics of IAB-type gabbroic rocks and basalts are compatible with their magmas derived from subduction influenced melts, whereas OIB-type gabbros show within-plate geochemical characteristics. IAB-type gabbros and basaltic rocks display similar geochemical features to the low-Ti Nadezhdinsky suit (Noril'sk region) and Bel'kov dolerite (New Siberian Islands) of the Siberian large igneous province (LIP) in view of HFSE depletion and high H 2 O content of the magma to crystallize abundant hornblende not only in gabbros but also as phenocrysts in basalts. The Triassic gabbroic and basaltic rocks of both OIB and IAB types may as a whole represents the eastern end of the Siberian LIP.

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“…By their geochemical parameters, the tholeiitic basalts of this sequence are close to oceanic varieties [88]. Its siliceous rock yielded the BajocianKimmeridgian radiolarian assemblage [88]. The Verkhoyansk region, Chersky Range, and Selennyakh River basin (Fig.…”

Section: The Verkhoyansk-chukotka-alaska Orogenic Beltmentioning

confidence: 98%

“…In this area, the Gromadninsk-Vurguveem ophiolitic slice [19 and others] is structurally overlain by a slice of the jasper-basaltic Gremuchinskaya Sequence also tectonically differentiated into tectonic lenses and sheets [39]. By their geochemical parameters, the tholeiitic basalts of this sequence are close to oceanic varieties [88]. Its siliceous rock yielded the BajocianKimmeridgian radiolarian assemblage [88].…”

Section: The Verkhoyansk-chukotka-alaska Orogenic Beltmentioning

confidence: 99%

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Allochthonous Mesozoic marine sequences of northeastern Asia and western North America: Correlation of the stratigraphic levels and geodynamic depositional settings

Vishnevskaya

Filatova

2012

Russ. J. of Pac. Geol.

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South Anyui suture, northeast Arctic Russia: Facts and problems

Cited by 50 publications

References 0 publications

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

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

Petrogenises of Triassic gabbroic and basaltic rocks from Chukotka, NE Russia: Eastern end of the ‘arc–type’ Siberian LIP?

Allochthonous Mesozoic marine sequences of northeastern Asia and western North America: Correlation of the stratigraphic levels and geodynamic depositional settings

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