Structure and stratigraphy of the Hanna Trough, U.S. Chukchi Shelf, Alaska

Sherwood, Kirk W.; Johnson, Peter P.; Craig, James D.; Zerwick, S.A.; Lothamer, Richard T.; Thurston, Dennis K.; Hurlbert, Sally B.

doi:10.1130/0-8137-2360-4.39

Cited by 52 publications

(63 citation statements)

References 19 publications

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“…The Cretaceous -Paleogene boundary (Mid-Brookian Unconformity, MBU) is rather reliably traced into the North Chukchi Basin and the Amerasian Basin. On the Alaska Shelf, this boundary is eroded and has an angular unconformity [Sherwood et al, 2002;Kumar et al, 2011]. In the North Chukchi Basin, the bottom of the thick lower clinoform complex corresponds to this boundary.…”

Section: Stratigraphy Of the Arctic Oceanmentioning

confidence: 99%

“…The rift basins have probably experienced a phase of compression and a slight inversion. Considering that the phase of compression and folding in the area of the North Chukchi Basin was approximately at the boundary of Cretaceous and Paleogene [Sherwood et al, 2002;Verzhbitsky et al, 2012;Nikishin et al, 2014], a compression phase in the Chukchi Plateau area can also be dated approximately as the boundary of the Cretaceous and the Paleogene. On this ground, we date the age of the main rifting as Pre-Paleocene.…”

Section: Geological Structure Of the Chukchi Plateaumentioning

confidence: 99%

“…In the Arctic Region, several commercial wells were drilled on the shelf in the American part of the Chukchi Sea (Popcorn, Crackerjack, Klondike, Burger, and Diamond) [Sherwood et al, 2002;Kumar et al, 2011]. Based on these data, the stratigraphic scheme was developed for the Alaska Shelf [Sherwood et al, 2002].…”

Section: Stratigraphy Of the Arctic Oceanmentioning

confidence: 99%

“…Based on these data, the stratigraphic scheme was developed for the Alaska Shelf [Sherwood et al, 2002]. We compiled composite seismic profiles connecting the Russian seismic lines in the Arctic and some commercial lines on the shelf with the Popcorn-1, Crackerjack-1, and Burger-1 wells.…”

Section: Stratigraphy Of the Arctic Oceanmentioning

confidence: 99%

“…The most complete Cenozoic section is penetrated by the Popcorn-1 well [Sherwood et al, 2002], in which the section of the Eocene is available. The Eocene section is subdivided into three units: Lower Eocene, Middle Eocene, and Upper Eocene.…”

Section: Stratigraphy Of the Arctic Oceanmentioning

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: Stratigraphy Of the Arctic Oceanmentioning

confidence: 99%

Section: Geological Structure Of the Chukchi Plateaumentioning

confidence: 99%

Section: Stratigraphy Of the Arctic Oceanmentioning

confidence: 99%

Section: Stratigraphy Of the Arctic Oceanmentioning

confidence: 99%

Section: Stratigraphy Of the Arctic Oceanmentioning

confidence: 99%

See 3 more Smart Citations

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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Seismostratigraphy of the Siberian Sector of the Arctic Ocean and adjacent Laptev Sea Shelf

2014

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A new seismostratigraphic model has been established within the Arctic Ocean adjacent to the East Siberian Shelf on the basis of multichannel seismic reflection data acquired along a transect at 81°N. Ages for the sedimentary units were estimated via links to seismic lines and drill site data of the US Chukchi Shelf, the Lomonosov Ridge, and the adjacent Laptev Shelf. Two distinct seismic units were mapped throughout the area and are the constraints for dating the remaining strata. The lower marker unit, a pronounced high-amplitude reflector sequence (HARS), is the most striking stratigraphic feature over large parts of the Arctic Ocean. It indicates a strong and widespread change in deposition conditions. Probably, it developed during Oligocene times when a reorientation of Arctic Plates took place, accompanied by the gradual opening of the Fram Strait, and a widespread regression of sea level. The top of the HARS likely marks the end of Oligocene/early Miocene (23 Ma). An age estimate for the base of the sequence is less clear but likely corresponds to base of Eocene (˜56 Ma). The second marked unit detected on the seismic lines parallels the seafloor with a thickness of about 200 ms two-way travel time (160 m). Its base is marked by a change from a partly transparent sequence with weak amplitude reflections below to a set of continuous high-amplitude reflectors above. This interface likely marks the transition to large-scale glaciation of the northern hemisphere and therefore is ascribed to the top Miocene (5.3 Ma).

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Significance of Northeast‐Trending Features in Canada Basin, Arctic Ocean

Hutchinson

Jackson

Houseknecht

et al. 2017

Geochem Geophys Geosyst

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Synthesis of seismic velocity, potential field, and geological data from Canada Basin and its surrounding continental margins suggests that a northeast‐trending structural fabric has influenced the origin, evolution, and current tectonics of the basin. This structural fabric has a crustal origin, based on the persistence of these trends in upward continuation of total magnetic intensity data and vertical derivative analysis of free‐air gravity data. Three subparallel northeast‐trending features are described. Northwind Escarpment, bounding the east side of the Chukchi Borderland, extends ∼600 km and separates continental crust of Northwind Ridge from high‐velocity transitional crust in Canada Basin. A second, shorter northeast‐trending zone extends ∼300 km in northern Canada Basin and separates inferred continental crust of Sever Spur from magmatically intruded crust of the High Arctic Large Igneous Province. A third northeast‐trending feature, here called the Alaska‐Prince Patrick magnetic lineament (APPL) is inferred from magnetic data and its larger regional geologic setting. Analysis of these three features suggests strike slip or transtensional deformation played a role in the opening of Canada Basin. These features can be explained by initial Jurassic‐Early Cretaceous strike slip deformation (phase 1) followed in the Early Cretaceous (∼134 to ∼124 Ma) by rotation of Arctic Alaska with seafloor spreading orthogonal to the fossil spreading axis preserved in the central Canada Basin (phase 2). In this model, the Chukchi Borderland is part of Arctic Alaska.

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Structure and stratigraphy of the Hanna Trough, U.S. Chukchi Shelf, Alaska

Cited by 52 publications

References 19 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

Seismostratigraphy of the Siberian Sector of the Arctic Ocean and adjacent Laptev Sea Shelf

Significance of Northeast‐Trending Features in Canada Basin, Arctic Ocean

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