scholarly journals Geometry and Evolution of the Tanquary Structural High and Its Effects On the Paleogeography of the Sverdrup Basin, northern Ellesmere Island, Canadian Arctic

1989 ◽  
Author(s):  
L E Maurel
Keyword(s):  
Canadian Arctic ◽  
Ellesmere Island ◽  
Sverdrup Basin ◽  
Structural High

Deciphering superimposed Ellesmerian and Eurekan deformation, Piper Pass area, northern Ellesmere Island (Nunavut)

2007 ◽  
Vol 44 (10) ◽  
pp. 1439-1452 ◽  
Author(s):  
Karsten Piepjohn ◽  
Werner von Gosen ◽  
Solveig Estrada ◽  
Franz Tessensohn
Keyword(s):  
Fault Zone ◽  
Tectonic Evolution ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
Thrust Faults ◽  
Fold Belt ◽  
Sverdrup Basin

The tectonic evolution in the Piper Pass area in northern Ellesmere Island (Canadian Arctic) is characterized by the superimposition of two major deformational events: the Paleozoic Ellesmerian Orogeny and the Tertiary Eurekan deformation. It is difficult to separate the structures formed during each deformation in the parts of the Canadian Arctic in which the post-Ellesmerian and pre-Eurekan Sverdrup Basin is not preserved (Hazen Fold Belt, Central Ellesmere Fold Belt). In the vicinity of the Lake Hazen Fault Zone in the Piper Pass area, kilometre-scale kink folds, cleavage planes and SSE-directed thrust faults are unconformably overlain by Permian through Tertiary rocks of the Sverdrup Basin, which clearly indicates that they are related to the Ellesmerian Orogeny. However, the steep faults of the Lake Hazen Fault Zone are characterized by possible lateral movements and by NNW–SSE compression that cut through or affect both the pre-Ellesmerian Franklinian strata, as well as the post-Ellesmerian Sverdrup Basin deposits. These structures can clearly be assigned to post-mid Cretaceous movements of the Eurekan deformation. The Piper Pass area is a key area in which it is possible to recognize and distinguish Ellesmerian from Eurekan structures.

An Unusual Occurrence of Bashkirian (Pennsylvanian) Rugose Corals From the Sverdrup Basin, Arctic Canada

2012 ◽  
Vol 86 (6) ◽  
pp. 979-995 ◽  
Author(s):  
Jerzy Fedorowski ◽  
E. Wayne Bamber ◽  
Darya V. Baranova
Keyword(s):  
Canadian Arctic ◽  
Ellesmere Island ◽  
Arctic Canada ◽  
Source Areas ◽  
Coral Fauna ◽  
Novaya Zemlya ◽  
Rugose Corals ◽  
Rugose Coral ◽  
Sverdrup Basin ◽  
Unusual Occurrence

The oldest known Carboniferous rugose coral fauna in the Canadian Arctic Islands was collected in the Yelverton Inlet area of northern Ellesmere Island, from Bashkirian carbonates of the lower Nansen and Otto Fiord formations. It includes the generaDibunophyllumThomson and Nicholson,LonsdaleiaMcCoy,PalaeosmiliaMilne-Edwards and Haime andTizraia? Said and Rodríguez. Such a generic assemblage is unknown elsewhere above the Serpukhovian. An upper? Bashkirian specimen ofParaheritschioidesSando, collected above the main fauna, is the oldest known representative of that genus. Faunal comparisons suggest Novaya Zemlya or northern Timan as the most likely source areas for the Yelverton Inlet fauna.

The first Tertiary (Paleocene) marine mollusks from the Eureka Sound Group, Ellesmere Island, Canada

1991 ◽  
Vol 65 (2) ◽  
pp. 242-248 ◽  
Author(s):  
Louie Marincovich ◽  
William J. Zinsmeister
Keyword(s):  
Atlantic Ocean ◽  
South Dakota ◽  
Arctic Ocean ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
Marine Mollusks ◽  
Molluscan Fauna ◽  
Northern Atlantic ◽  
Northern Alaska ◽  
Northern Atlantic Ocean

The gastropod Drepanochilus pervetus (Stanton) and the bivalve Cytrodaria rutupiensis (Morris) occur in the Mount Moore Formation at Strathcona Fiord, west-central Ellesmere Island, northern Canada. They are the first marine mollusks identified from the Eureka Sound Group of the Canadian arctic islands. These mollusks correlate with Paleocene faunas of the Cannonball Formation of North Dakota and South Dakota, the Prince Creek Formation of northern Alaska, the Barentsburg Formation of Svalbard, and the Thanet and Oldhaven Formations of southeastern England. These occurrences imply that the earliest Tertiary Arctic Ocean molluscan fauna was compositionally distinct from coeval faunas of the northern Atlantic Ocean.

Tracking compositional changes within the High Arctic Large Igneous Province using zircon Hf isotopes from altered volcanic ash layers of the Sverdrup Basin, Canada

2021 ◽  
Author(s):  
Michael Pointon ◽  
Michael Flowerdew ◽  
Peter Hülse ◽  
Simon Schneider ◽  
Ian Millar ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Volcanic Ash ◽  
Volcanic Belt ◽  
High Arctic ◽  
Ellesmere Island ◽  
Hf Isotope ◽  
Large Igneous Province ◽  
Volcanic Material ◽  
Igneous Province ◽  
Sverdrup Basin

<p>During Late Cretaceous times the Sverdrup Basin, Arctic Canada, received considerable air-fall volcanic material. This is manifested as numerous centimetre- to decimetre-thick diagenetically altered volcanic ash layers (bentonites) that occur interbedded with mudstones of the Kanguk Formation. Previous research on bentonite samples from an outcrop section in the east of the basin (Sawtooth Range, Ellesmere Island) revealed two distinct volcanic sources for the bentonites: most of the bentonites analysed (n=9) are relatively thick (0.1 to 5 m), were originally alkaline felsic ashes, and were likely sourced from local volcanic centres on northern Ellesmere Island or the Alpha Ridge that were associated with the High Arctic Large Igneous Province (HALIP). Two thinner (<5 cm) bentonites with contrasting subalkaline geochemistry were also identified. These were inferred to have been derived from further afield, from volcanic centres within the Okhotsk-Chukotka Volcanic Belt, Russia.</p><p>To better understand volcanism within the vicinity of the Sverdrup Basin during Late Cretaceous times, and further test the above interpretations, a larger suite of bentonite samples was investigated, drawing on samples from outcrop sections in the central and eastern Sverdrup Basin. Whole-rock geochemical analyses and combined zircon U-Pb age and Hf isotope analyses were undertaken. The vast majority of bentonites analysed to date have alkaline geochemistry and were likely sourced from proximal volcanic centres related to the HALIP. The combined U-Pb and Hf isotope data from these bentonites show a progression from evolved (-2 to 0) to moderately juvenile (+9 to +10) εHf<sub>(t)</sub> values between late Cenomanian and early Campanian times (<em>c</em>. 97–81 Ma). This is interpreted to record compositional change through time within the local HALIP magmatic system.</p>

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