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2 edition of Deformation of the eastern Sudbury Basin found in the catalog.

Deformation of the eastern Sudbury Basin

Ewen Jun Cowan

Deformation of the eastern Sudbury Basin

by Ewen Jun Cowan

  • 172 Want to read
  • 31 Currently reading

Published .
Written in English


The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL19637106M
ISBN 100612188698

The Sudbury Basin in the Canadian Shield has been proposed as a meteorite impact site subsequently deformed by endogenic tectonism. Detailed study of the structural geology strengthens this hypothesis and strongly suggests that the deformation of the basin was coeval with major folding and flattening ( to b.y. ago) of the rocks of the eastern Southern province and the northwesternmost. The Ga Sudbury Igneous Complex (SIC) and its thermal aureole are unique on Earth with regard to unraveling the effects of a large impact melt sheet on adjacent target rocks.

The Great Lakes tectonic zone (GLTZ) is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin, Marquette, Michigan, and then trends more northeasterly to skim the northern-most shores of lakes.. Algoman orogeny added landmass to the Superior province by volcanic activity and continental collision along a boundary that. The SIC is the relic of a layered impact melt sheet that was transformed into a fold basin, the Sudbury Basin, during Paleoproterozoic deformation at the southern margin of the Archean Superior.

Structure Descriptions: Two patterns of deformation can be distinguished at Sudbury: (1) an early sequence centered on the Sudbury Igneous Complex [6] and (2) several later episodes of regional deformation that cut basin-controlled features, i.e., are insensitive to the impact structure. The Main Igneous Complex. The Creighton granitic pluton, which is located along the southern margin of the Sudbury Basin within the Southern Province, was affected by a local deformation event prior to the widespread.


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Deformation of the eastern Sudbury Basin by Ewen Jun Cowan Download PDF EPUB FB2

The Sudbury Basin / ˈ s ʌ d b ə r i /, also known as Sudbury Structure or the Sudbury Nickel Irruptive, is a major geological structure in Ontario, is the third-largest known impact crater or astrobleme on Earth, as well as one of the oldest. The crater formed Age: Ma, Paleoproterozoic. Low-temperature deformation mechanisms at a lithotectonic interface near the Sudbury Basin, Eastern Penokean Orogen, Canada.

Southwest of the Sudbury Basin, variations in macroscopic strain, microstructure and deformation mechanisms within Archaean granitoid basement and overlying Proterozoic rocks suggest that rock strength was strongly Cited by:   The Sudbury Structure is a ∼27 × 60 km oval-shaped basin with an original diameter estimated to be – km (Peredery and Morrison,Grieve,Spray and Thompson,Spray et al., ).The oval shape is believed by Shanks and Schwerdtner, a, Shanks and Schwerdtner, b to be the result of deformation during late stages of the Penokean orogeny Cited by: Three different deformation phases were established in the Late Miocene to Late Pleistocene.

Compressional and transtensional tectonic regime alternated to dominate evolution of Lake Van Basin. Two different localities of terrace deposits in east of the Lake Van Basin reach m in the Deformation of the eastern Sudbury Basin book and m Yeşilköy (– ka.

• Sudbury Basin is 62km long, 32 km wide and 15 km deep.\ • Also located near the confluence of 3 major plates in the North American Craton, the Superior, the Grenville and the Southern. Origins • The Sudbury Basin or Structure was formed by the impact of a 10 km meteorite.

Journals & Books; Help Cleavage formation in the Precambrian Chelmsford Formation of the Sudbury Basin, Ontario, is directly related to the finite strain and deformation path. Finite strain was measured at the outcrop scale from the shapes and orientations of deformed concretions within sandstones, at the microscopic scale from the relative.

Interpretation of these thrusts provides critical timing constraints relating the Sudbury tectonic deformation to deposition of the Sudbury Basin sediments. The Onwatin argillites are penetrated by blind thrust faults, whereas the overlying Chelmsford turbidites are.

The synformal Sudbury Igneous Complex (SIC) is the deformed relic of a large impact melt sheet. Understanding the geometry and kinematics of deformati. The SIC defines the Sudbury Basin (Fig. 1) and provides an ideal geological setting for this task as its surface geometry and deformation structures are mapped in considerable detail (e.g.

The deformation intensity decreased rapidly to the northwest, so that near the basin axis the rocks yielded by folding, while in the North Range the only vestige of the deformation is a local and weak grains in the Onaping Formation are generally recrystallized and the lack of a crystallographic preferred orientation suggests.

The synformal Sudbury Igneous Complex (SIC) is the deformed relic of a large impact melt sheet. Understanding the geometry and kinematics of deformation of the SIC is paramount for mineral resource deposit exploration of this complex, constraining its pre-impact configuration and understanding Paleoproterozoic tectonism at the southern margin of the Archean Superior Province.

Introduction [2] Evidence for genesis of the Ga Sudbury Structure (SS) by a meteorite impact is now overwhelming.

The Sudbury Igneous Complex (SIC) is interpreted as the melt sheet produced by the impact. The primary observation leading to interpretation of the SS as having a meteorite impact origin was the recognition by Dietz of shatter cones in basement rocks.

A broad zone of intense ductile to brittle deformation transects the Paleo‐Proterozoic Sudbury Igneous Complex and likely formed during the final stages of the Penokean orogeny on the southern margin of the Superior Province.

Herein we present a three‐dimensional image of this deformation zone, derived from four seismic reflection profiles. The eastern Sudbury Basin contains two higher-order synclines, the NE lobe and the SE lobe, and an apparently west-plunging anticline between the synclines (Riller ).

The lobes divide the SIC into weakly curved segments that are topographically elevated and known as the North Range, the East Range, and the South Range (Fig. 1b). Geological map of Sudbury Basin Shatter cone from Sudbury Impact Structure, Cleveland Museum of Natural History.

The Sudbury Basin, also known as Sudbury Structure or the Sudbury Nickel Irruptive, is a major geological structure in Ontario, is the third-largest known impact crater or astrobleme on Earth, as well as one of the oldest. [1] The crater formed billion years ago in.

The absolute timing of these events is unknown. All deformation was complete prior to the intrusion of the l,m.y.-old Sudbury lly the (N1) Sudbury norite occupied an open syncline, with limbs dipping approximately 20 degrees, which plunged gently to the southwest.

The magmatic copper-nickel sulphide deposits at Sudbury are part of the Paleoproterozoic Sudbury Structure which comprises the Sudbury Igneous Complex (SIC); breccias, mudstones siltstones and wackes of the Whitewater Group which occupy the centre of the Sudbury Basin; and a ring of brecciated and shockmetamorphosed Archean and Paleoproterozoic footwall rocks which surrounds the SIC.

This thesis aims to understand how the eastern portion of the Sudbury Basin, the East Range, in Ontario, Canada, geometrically evolved since the emplacement of its defining lithology, the Sudbury Igneous Complex (SIC) at Ga. The Sudbury Basin is an elliptical fold basin which due to variations in its surface expression can be subdivided into three ranges: The North Range, the South Range.

Low-temperature deformation mechanisms at a lithotectonic interface near the Sudbury Basin, Eastern Penokean Orogen, Canada.

Tectonophysics (): Crossref, Google Scholar. Rousell DH. The Sudbury Basin ores are a significant source of cobalt metal that is recovered as a by-product of nickel smelting and refining. Although the bulk of cobalt content of the Sudbury ores is derived from cobalt in solid solution with nickel in pentlandite, some of the cobalt content of Sudbury ores is derived from cobaltite gersdorffite and.

Sudbury, city, seat of Sudbury district, southeastern Ontario, Canada. It is situated on the western shore of Ramsey Lake, about 40 miles north of Georgian Bay of Lake Huron.

In the s Sudbury became the most important mining center in Canada, with a majority of its population employed in that industry.Fault-slip inversions: their importance in terms of strain, heterogeneity and kinematics of brittle deformation.

Journal of Structural GeologyClark, M.D., Riller, U., Significance of first-order faults in folding mechanically isotropic layers: evidence from the Sudbury Basin, Canada.

Journal of Structural Geol The kinematics and associated deformation of upper crust in fossil and active convergent tectonic settings require different methods of study.

In this thesis, I analyzed an example of a fossil convergent setting, the formation of the eastern portion of Paleoproterozoic Sudbury Basin, Ontario, and an example of an active convergent plate.