Chapter 13 Sverdrup Basin

Embry, Ashton F.; Beauchamp, Benoı̂t

doi:10.1016/s1874-5997(08)00013-0

Cited by 87 publications

(92 citation statements)

References 39 publications

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“…The cyclic pattern recognised in the Wordiekammen Formation resembles that reported from coeval marine successions elsewhere (Ross & Ross, 1985;Stemmerik & Worsley, 1989;Heckel, 1990;Beauchamp, 1994;Ludvig, 1994;Morin et al, 1994;Bugge et al, 1995;Stemmerik et al, 1995;Ehrenberg et al, 1998;Soreghan & Giles, 1999;Embry & Beauchamp, 2008;Stemmerik, 2008;Corrochano et al, 2012;Hill et al, 2012;Laya & Tucker, 2012). It is widely accepted to reflect the depositional response to glacioeustatic sea-level fluctuations linked to the Late Palaeozoic glaciation in southern Gondwanaland (Ross & Ross, 1985;Veevers & Powell, 1987;Crowley & Baum, 1991;Soreghan & Giles, 1999).…”

Section: Cyclicity and Periodicitysupporting

confidence: 72%

Depositional evolution of the Upper Carboniferous – Lower Permian Wordiekammen carbonate platform, Nordfjorden High, central Spitsbergen, Arctic Norway

Ahlborn¹,

Stemmerik²

2015

NJG

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This paper presents the first comprehensive study of the Wordiekammen carbonate platform on the Nordfjorden High, Central Spitsbergen. The Wordiekammen succession is divided into four depositional sequences bounded by subaerial exposure surfaces and consists of 12-84 m-thick wedgeshaped sequences being thickest in the distal area and thinner on the crest of the High. The uppermost Finlayfjellet Beds (Tyrrellfjellet sequence 2) represents in contrast a uniform sequence. The Wordiekammen Formation is composed of 11 depositional carbonate facies and three overprint facies which are grouped into 10 facies associations. Each association represents a predictable pattern of facies, 0.5-22 m thick, which is repeated many times producing a distinct cyclicity in the succession. The Wordiekammen Formation is composed of 50 depositional cycles, 21 cycles in the Kapitol Member and 29 cycles in the Tyrrellfjellet Member. Analysis of the well-dated Tyrrellfjellet Member indicates that the succession was controlled by mixed 100 kyr and 400 kyr cyclicity signals which are believed to be a reflection of eustatic sea-level fluctuation and tectonic instability. Allocyclic control on the deposition dominated the majority of the Wordiekammen succession, and an abrupt change in depositional style in the uppermost Finlayfjellet Beds is believed to reflect the break-down of the Gondwanaland ice sheets and the end of glacio-eustaic control. Four key lithological intervals and unconformities have been correlated across the Billefjorden Fault Zone to the time-equivalent succession in Bünsow Land. Based on the correlation, it is considered that the distal part of the Nordfjorden High towards the west and the carbonate platform on Bünsow Land reflected a similar geological setting while the up-dip and crestal part of the Nordfjorden High was a positive feature that divided the two carbonate platforms during sea-level lows. Finally, it is believed that the Nordfjorden High remained a homoclinal carbonate ramp up to at least Late Asselian times.

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Section: Cyclicity and Periodicitysupporting

confidence: 72%

Depositional evolution of the Upper Carboniferous – Lower Permian Wordiekammen carbonate platform, Nordfjorden High, central Spitsbergen, Arctic Norway

Ahlborn¹,

Stemmerik²

2015

NJG

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“…Cycles 1, 2, 3 and 4 correspond with approximate numerical ages of 130 Ma, 120 Ma, 100 Ma and 85 Ma (Embry & Osadetz, (Embry & Beauchamp, 2008 Embry & Beauchamp, 2008). Embry & Osadetz (1988 100 C.G.…”

Section: Black Irregular Thin Stippled Line On the Canadian Side Oumentioning

confidence: 88%

“…A small and growing number of U-Pb ages on tabular doleritic intrusions along with the gabbroic Wootton Igneous Complex (northern Ellesmere Island) are a second rejuvenated period of subsidence during the interval between the Early Cretaceous and Cenomanian (Embry & Beauchamp, 2008). Mounting evidence from elsewhere on the globe strongly suggests that in many cases, but not all, LIPs herald major breakup events, such as the 201 Ma Central Atlantic Magmatic Province, the 135 Ma Parana-Etendeka LIP and the 60 Ma North Atlantic Igneous Province for the staged rifting of the central, southern and northern Atlantic Ocean, respectively (White & McKenzie, 1989;Milner et al, 1995;Peate, 1997;Courtillot et al, 1999;Marzoli, 1999;Smallwood & White, 2002;Ernst, 2014).…”

Section: Black Irregular Thin Stippled Line On the Canadian Side Oumentioning

confidence: 99%

“…However, owing to such factors as deformation due to intruding evaporitic diapirs (e.g., South Fiord Dome; Fig. 4), as well as Paleocene-Eocene Eurekan orogenic deformation (Embry & Beauchamp, 2008), coupled with cyclic freeze-thaw processes, much of the topography consists of ridges mantled with talus. Thus, it was typically challenging to determine whether intrusions were conformable with or cross-cut sedimentary bedding.…”

Section: Figure 2 Outline Map Of the Sverdrup Basin Showing Study Simentioning

confidence: 99%

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The High Arctic LIP in Canada: Trace element and Sm–Nd isotopic evidence for the role of mantle heterogeneity and crustal assimilation

Kingsbury¹,

Ernst²,

Cousens³

et al. 2016

NJG

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The Cretaceous geological evolution of the Canadian Arctic was marked by voluminous magmatism comprising Canada's portion of the High Arctic large igneous province (HALIP) that is thought to have resulted from a mantle plume head. This magmatism is largely recorded as extensive Early Cretaceous lavas of the Isachsen Formation, Late Cretaceous continental flood basalts of the Strand Fiord Formation, and an extensive network of dykes and sills forming their plumbing systems. Axel Heiberg Island near South Fiord contains a small, structurally complex portion of the overall network of HALIP tabular intrusions, from which samples from the South Fiord intrusions and Isachsen Formation basaltic lavas were analysed to better understand their petrogenesis. Specifically, we apply trace-element ratios together with Sm-Nd isotope systematics in order to identify processes that shaped the chemical evolution of the South Fiord intrusions and Isachsen Formation lavas, to identify (1) mantle source chemistries and (2) the role of crustal assimilation. On the basis of Sm-Nd isotopic results, South Fiord intrusion magmas were derived from a homogeneous mantle source whereas a more heterogeneous source is invoked for the Isachsen Formation lavas. Furthermore, modelling with Th/ La, Nb/U, Ba/Th and Ba/Nb suggests that South Fiord intrusive magmatism was contaminated by sedimentary rocks from the Sverdrup Basin. Conversely, a trend towards high Ba/Th in Isachsen Formation lavas suggests a subducted sediment component derived from extinct subduction zones. We surmise that (1) South Fiord intrusive rocks are geochemically distinct from the Isachsen Formation lavas and (2) the HALIP mantle plume head intersected and incorporated sediments from ancestral subduction zones to the present-day Aleutian and Alaska subduction zones to produce the Isachsen Formation flows, whereas the South Fiord intrusions (and correlated Strand Fiord magmatism) were generated from plume material that interacted with upper crustal sedimentary rocks.

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“…1; Trettin, 1991a). Between the Mid Jurassic and the Early Cretaceous, the northern Canadian margin became part of a rift shoulder, the Sverdrup Rim, that separated the Sverdrup Basin in the south from the Amerasia Basin in the north (e.g., Balkwill, 1978;Embry & Dixon, 1990;Embry & Beauchamp, 2008). …”

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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Chapter 13 Sverdrup Basin

Cited by 87 publications

References 39 publications

Depositional evolution of the Upper Carboniferous – Lower Permian Wordiekammen carbonate platform, Nordfjorden High, central Spitsbergen, Arctic Norway

Depositional evolution of the Upper Carboniferous – Lower Permian Wordiekammen carbonate platform, Nordfjorden High, central Spitsbergen, Arctic Norway

The High Arctic LIP in Canada: Trace element and Sm–Nd isotopic evidence for the role of mantle heterogeneity and crustal assimilation

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

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