The Sudbury Structure, Ontario, Canada — A Review

Dressler, B. O.; Morrison, Gordon G.; Peredery, Walter V.; Rao, B. V.

doi:10.1007/978-3-663-01889-6_3

Cited by 24 publications

(19 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, its origin has not escaped controversy, with endogenic volcanic and/or magmatic components proposed in whole or in part (Stevenson, 1972;Muir, 1984;Dressler et al, 1987;Lowman, 1992;Chai and Eckstrand, 1994;Gibbins, 1994;Lightfoot et al, 1997a,b;Keays and Lightfoot, 1999). Igneous rocks of the Sudbury structure include the felsic norite, quartz gabbro, and granophyre units which comprise the main mass, the sublayer, and the quartz diorite offset dikes ( Fig.…”

Section: Regional Geologic Overviewmentioning

confidence: 97%

Vitric Compositions in the Onaping Formation and Their Relationship to the Sudbury Igneous Complex, Sudbury Structure

Ames¹,

Golightly²,

Lightfoot³

et al. 2002

Economic Geology

View full text Add to dashboard Cite

Section: Regional Geologic Overviewmentioning

confidence: 97%

Vitric Compositions in the Onaping Formation and Their Relationship to the Sudbury Igneous Complex, Sudbury Structure

Ames¹,

Golightly²,

Lightfoot³

et al. 2002

Economic Geology

View full text Add to dashboard Cite

“…The structure has an estimated diarmeter of ~180-250 km (Peredery and Morrison, 1984;Dressler et al, 1987;Grieve et al, 1991) and is strongly deformed due to thrusting from the southeast Schwerdtner, 1990, Milkereit et al, 1992). Shock-metamorphosed target rocks beneath the Sudbury Igneous Complex (SIC), shatter cones up to ~20 km from the SIC, strong brecciation of target rocks up to 80 km from the SIC, and shock-metamorphosed target rock clasts and recrystallized impact glasses in thick suevitic breccia deposits of the Onaping Formation within the Sudbury Basin provide evidence that the structure was formed as a result of impact.…”

Section: Introductionmentioning

confidence: 97%

Origin of carbonaceous matter, fullerenes, and elemental sulfur in rocks of the Whitewater Group, Sudbury impact structure, Ontario, Canada

Heymann¹,

Dressler²,

Knell³

et al. 1999

Large Meteorite Impacts and Planetary Evolution; II

View full text Add to dashboard Cite

New carbon determinations of 20 rocks confirm that both the breccias of the BlackMember of the Onaping Formation and the mudstones of the Onwatin Formation of the Whitewater Group in the 1.8-Ga Sudbury impact structure contain appreciable amounts of carbonaceous matter. The origin of the carbon has been a long-standing enigma. Carbon-bearing target rocks, either carbonaceous mudstones or carbonate target rocks are not its source, and neither is CO 2 from the atmosphere of the impact area, or carbon from the impacting projectile itself. Fumarolic activity is also ruled out. New isotopic δ 13 C results of carbon from 17 Black Member breccias, and 1 each from a Gray Member breccia and an Onwatin Formation range from -35.22 to -26.26‰. Together with Raman spectra of carbon from 11 of these samples, they lead to the conclusion that the Black Member carbon is biogenic. This unit cannot have formed as an "instant clastic sediment," but must have accumulated over several millions of years while prolific prokaryotic activity (archaea and bacteria) occurred. Isotopic δ 13 C and Raman results of carbon from an anthraxolite confirm that this carbon is derived from the Onwatin Formation. A search for fullerenes C60 and C70 by high-performance liquid chromatography (HPLC) in 17 rocks from the Black Member of the Onaping Formation, 1 rock from the Gray Member of the Onaping Formation, and by mass spectrometry of 3 breccias from the Black Member failed to find any fullerenes. Elemental sulfur in the breccias from the Gray and Black Members of the Onaping Formation and in one sample of the Onwatin Formation is due to weathering of pyrrhotite. The isotopic composition of the elemental sulfur as well as that of the sulfide-S contains a mass-independent fractionation component whose origin is not understood.

show abstract

“…The Sudbury Structure (SS) is a unique geologic feature hosting one of the largest Ni-Cu reserves in the world, and its origin has been vigorously debated for more than a century (Guy-Bray 1972;Pye et al 1984;Dressler et al 1987;Grieve et al 1991;Boerner et al 1 9 9 4~) .…”

Section: Introductionmentioning

confidence: 99%

Timing constraints on deformation history of the Sudbury Impact Structure

Wu¹,

Milkereit²,

Boerner³

1994

Can. J. Earth Sci.

View full text Add to dashboard Cite

Herein, we present new high-resolution seismic images of the Sudbury Impact Structure, acquired across the Sudbury Igneous Complex and its environs, which provide evidence for the relative timing of the deformation events that reshaped the initial Sudbury Structure. The seismic images show that the lower unit of the Sudbury basinal fill sediments, the Onwatin argillite, is penetrated by a set of blind, imbricated thrusts, whereas the overlying Chelmsford turbidites are unaffected by faulting. We interpret this observation to mean that the deposition of the Chelmsford sediments postdates the latest major deformation of the Sudbury Structure, suggesting that the uniform paleocurrent trends observed in the Chelmsford turbidites are not related to the initial shape of the Sudbury Structure.Nous prksentons ici de nouvelles images sismiques de haute rCsolution de la structure d'impact de Sudbury, prClevCes en travers du Complexe ignC de Sudbury et ses environs; ces images fournissent des enseignements sur la pCriode relative des Cvknements de dCformation qui ont modifik la structure initiale de Sudbury. Les images sismiques rkvklent que I'unitC inferieure composCe des sCdiments de remplissage du bassin de Sudbury, l'argilite d'onwatin, est pCnCtrCe par un ensemble masquC de failles imbriquCes, tandis que les turbidites de Chelmsford sus-jacentes ne sont pas affectkes par les failles. Nous croyons que cette observation signifie que le dCpBt des skdiments de Chelmsford postdate la dernikre dCformation majeure de la structure de Sudbury, ce qui suggkre que les directions uniformes des palCocourants observkes dans les turbidites de Chelmsford ne sont pas likes i la morphologie initiale de la structure de Sudbury.[Traduit par la r6dactionlCan.

show abstract

The Sudbury Structure, Ontario, Canada — A Review

Cited by 24 publications

References 5 publications

Vitric Compositions in the Onaping Formation and Their Relationship to the Sudbury Igneous Complex, Sudbury Structure

Vitric Compositions in the Onaping Formation and Their Relationship to the Sudbury Igneous Complex, Sudbury Structure

Origin of carbonaceous matter, fullerenes, and elemental sulfur in rocks of the Whitewater Group, Sudbury impact structure, Ontario, Canada

Timing constraints on deformation history of the Sudbury Impact Structure

Contact Info

Product

Resources

About