Bache peninsula, Ellesmere island, arctic archipelago

Christie, R L

doi:10.4095/100534

Cited by 24 publications

(32 citation statements)

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“…On the flanks of Smith Sound, inner shelf Cambro-Ordovician strata consist of basal clastics (Dallas Bugt Formation) and varied shallow marine carbonates of the Ryder Gletscher Group comprising formations common to Canada and Greenland (Fig. 7b,c;Troelsen, 1950;Christie, 1967;. Farther north-west, the outer shelf and slope packages, with distinctive facies belts, such as Ordovician evaporites and Silurian reefs, confirm shelf and slope continuity across the seaway (Fig.…”

Section: Palaeozoic Franklinian Basinmentioning

confidence: 90%

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Precambrian–Palaeozoic geology of Smith Sound, Canada and Greenland: key constraint to palaeogeographic reconstructions of northern Laurentia and the North Atlantic region

Dawes

2009

Terra Nova

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Nares Strait separating Greenland and northernmost Canada is floored by continental crust. Most palaeogeographic reconstructions of Laurentia and the North Atlantic region model the seaway as the site of massive sinistral strike–slip and/or compression/transpression, subduction and collision, the supposed manifestations of the hypothetical Wegener Fault. However, these reconstructions fail to take into account the bedrock geology that represents within‐plate evolution. Both sides of Smith Sound, the southernmost part of Nares Strait, expose the same early Proterozoic to early Palaeozoic assemblages that are unaffected by seaway‐related tectonism or thermal activity. Smith Sound is an intact crustal block or `linchpin' demonstrating that there was no independent Greenland plate. North‐west Greenland was not a leading plate margin neither was Nares Strait the site of the plate boundary between Greenland and North America. The Wegener Fault does not exist. The Smith Sound linchpin constitutes a key constraint that must be respected in any palaeogeographic reconstruction of the region.

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Section: Palaeozoic Franklinian Basinmentioning

confidence: 90%

“…On the flanks of Smith Sound, inner shelf Cambro‐Ordovician strata consist of basal clastics (Dallas Bugt Formation) and varied shallow marine carbonates of the Ryder Gletscher Group comprising formations common to Canada and Greenland (Fig. 7b,c; Troelsen, 1950; Christie, 1967; Peel et al. , 1982).…”

Section: Provinces Of Smith Sound and Environsmentioning

confidence: 99%

Precambrian–Palaeozoic geology of Smith Sound, Canada and Greenland: key constraint to palaeogeographic reconstructions of northern Laurentia and the North Atlantic region

Dawes

2009

Terra Nova

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“…1850 14 C years ago, or as recently as 1540 to 1405 calendar years, close to the ages of shells in the medial moraine below Stygge Nunatak (compare Table 3; others 1993, 1997), 62 km due west of 'Leffert Lake I' (Figs. Ice streams and valley glaciers moving down fiords, straits or across other water bodies and then impinging on land have invariably ploughed up marine shells and bottom sediment and plastered these materials onto the adjacent land masses, as noted first in the field area by Christie (1962Christie ( , 1967. The procedure of dating a single shell or shell fragment eliminates the possibility of mixing Holocene-aged shell material with the pre-Holocene shells that are also widespread in glacial deposits in the area (Blake 1977a(Blake , 1985(Blake , 1986a(Blake , 1992a(Blake , 1992b(Blake , 1993England 1998England , 1999others 2000, 2004).…”

Section: Radiocarbon Age Determinations Leffert Glaciermentioning

confidence: 95%

Holocene fluctuations of Leffert Glacier and nearby outlet glaciers, Ellesmere Island, Nunavut, Canada

Blake

2011

Polar Record

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Radiocarbon age determinations on marine shells in lateral moraines and other deposits several kms behind the present day termini of tidewater outlet glaciers from the Prince of Wales Icefield, east-central Ellesmere Island, Nunavut, Arctic Canada, as well as tidewater glaciers from two nearby ice-caps, show that these glaciers have fluctuated considerably through the Holocene, both in length and in thickness.

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“…The gedogy at Kane Basin has k e n well documented (e.g., Troelsen 1950; Christie 1967;Peel et a&. 1982;Peel and Christie 1982)-both sides of the seaway, Bache Peninsula and Inglefield Land, are part of the Proterozoic -Palaeozoic Arctic Platform.…”

Section: Nares Strait: a Major Collision Zone?mentioning

confidence: 99%

The Nares Strait gravity anomaly and its implications for crustal structure: Discussion

Dawes¹

1986

Can. J. Earth Sci.

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Jackson and Koppen9s paper reports the results of an eastwest gravimeter traverse across the central part of Nares Stmit (Kane Basin, Fig. I), the narrow seaway sepawting Greedand from Ellesmere Island. Their study is one of several recent field projects designed to clarify the tectonic relationship between the opposing landmasses across the North American -Greedand (NA -GR) plate boundary. As mentioned in the opening paragraph of Jackson and Koppen9s paper, the tectonic origin of Nares Strait has been the subject of considerable controversy. In 1980, Nares Strait was the topic of an international symposium aimed at determining whether the strait is the site of major continental displacements (Dawes and Kern 1982).Jackson and Koppen state (p. 1323) that "the gravity data along Nares Strait were collected to test, by forward modelling, if the collision zone predicted by plate reconstmctions and changes in crustal structure suggested by other geophysical anomalies were consistent with it. ' The two gravity profiles obtained show a negative free-air anomaly over the western part of Kane Basin, with values in the range of -108 to -120 m@d (1 mGal = 10 pm S-'), Fmm these data, twodimensiond crustal models are developed in an attenapt to identify the cause of the anomaly. The authors conclude that the regional gravity pattern is consistent with plate reconstmctions that require Nares Strait to be a major suture zone of collided continental crust. Thus, the gmvity data are said by Jackson and Koppen to support the plate motion scenarios outlined by Skvastava (1985) and Jackson (1985).The new gravity data are a very welcome addition t s the existing sparce geophy sical infomation from the region. ' 'A shortage of clear geophysical data from the sea floors in the Strait and in all the adjacent ~g i o n " is one of the general appraisals made by Wilson (1982) In the Nares Strait symposium volume. However, it is the regional application of the two gravity profiles that span but a 20 h wide zone, in terns of a 600 b long rift (the NA -GR plate boundary), without consideration of other gmvity surveys in the region be. g . , Sobczk and Stephens 19'74), that prompts this discussisn. This approach allows the authors to interpret their gmvity data as being indicative of a late Phanerozoic plate tectonic event (more precisely an effect of several predicted plate motions in the period defined by sea-floor spreading anomalies 34 and 13) rather than of Earth processes or events in the previous 3.5 Ma of Earth history.

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Bache peninsula, Ellesmere island, arctic archipelago

Cited by 24 publications

References 0 publications

Precambrian–Palaeozoic geology of Smith Sound, Canada and Greenland: key constraint to palaeogeographic reconstructions of northern Laurentia and the North Atlantic region

Precambrian–Palaeozoic geology of Smith Sound, Canada and Greenland: key constraint to palaeogeographic reconstructions of northern Laurentia and the North Atlantic region

Holocene fluctuations of Leffert Glacier and nearby outlet glaciers, Ellesmere Island, Nunavut, Canada

The Nares Strait gravity anomaly and its implications for crustal structure: Discussion

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