GRENVILLIAN METAMORPHISM OF MONOCYCLIC ROCKS, GEORGIAN BAY, ONTARIO, CANADA: IMPLICATIONS FOR CONVERGENCE HISTORY
Abstract
The objective of this paper is to represent the main features inherent to Grenville-Sveconorwegian Orogen (GSNO) and to propose a model of tectonic and geodynamic evolution of this orogen based on the results of research concerning similar Precambrian tectonic units in the East European Craton.The studies of the conditions and settings related to origin and evolution of GSNO are of special interest, because it is located geographicaly and in a certain sense ideologically in the center of Rodinia, a supposed Neoproterozoic supercontinent.GSNO originated in the Mezo-Neoproterozoic in the inner region of the Lauroscandia continent.At present, the synformal tectonic structure of GSNO is divided into two portions: Grenville sector along the southeastern margin of the Canadian Shield, and Sveconorwegian sector in the southwestern Scandinavia.The integrity of Lauroscandia was twice disturbed in the Mezo-Neoproterozoic when oceanic structures resembling the Atlantic Ocean were formed.Later on, the continuity of the continent was restored with the involvement of oceanic lithosphere subduction and accretion and obduction of the island-arc and oceanic terranes.We distinguish two stages in the GSNO history: (1) 'preparatory' stage (from ~1.90 to ~1.16 Ga), and (2) formation of GSNO proper (from ~1.19 to ~0.90 Ga).The manifestations of granulite-facies metamorphism were repeatedly recorded before the Grenville Orogeny at 1.67-1.66,1.47-1.45,1.37-1.35,and 1.20-1.18Ga.The Ottawan stage of t…
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Early Ottawan out-of-sequence thrusting of the terranes overlying the HP belt occurred in the western Grenville Province.
“early Ottawan out-of-sequence thrusting of the terranes overlying the HP belt in the western Grenville Province”
From The High Pressure belt in the Grenville Province: architecture, timing, and exhumation (2002) · cites this paper as Wodicka et al. 2000
The Shawanaga shear zone is situated beneath the HP belt.
“Shawanaga shear zone is situated beneath the HP belt, so displacement on it would have brought the HP rocks in its hanging wall into contact with hot lower crust in its footwall (Wodicka et al. 2000) but would not have contributed directly to unroofing of the HP belt.”
From The High Pressure belt in the Grenville Province: architecture, timing, and exhumation (2002) · cites this paper as Wodicka et al. 2000
Displacement on the Shawanaga shear zone would have brought the HP rocks in its hanging wall into contact with hot lower crust in its footwall.
“Shawanaga shear zone is situated beneath the HP belt, so displacement on it would have brought the HP rocks in its hanging wall into contact with hot lower crust in its footwall (Wodicka et al. 2000) but would not have contributed directly to unroofing of the HP belt.”
From The High Pressure belt in the Grenville Province: architecture, timing, and exhumation (2002) · cites this paper as Wodicka et al. 2000
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The High Pressure belt in the Grenville Province: architecture, timing, and exhumation
Rivers, T., Ketchum, J., Indares, A., & Hynes, A. (2002) · Canadian Journal of Earth Sciences · doi:10.1139/e02-025 · Cited by 124 · see citing works
Self-citation
- Authors
- Wodicka, N., Ketchum, J. W. F., & Jamieson, R. A.
- Affiliations
- Dalhousie University (CA)
- Venue
- The Canadian Mineralogist
- Publisher
- Mineralogical Association of Canada
- Published
- 2000-04-01
- Volume
- 38
- Issue
- 2
- Pages
- 471-510
- ISSN
- 0008-4476 (ISSN-L)
- 1499-1261
- OpenAlex
- W2078685527
- Cited by
- 57
- References
- 0
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 5 · 2023: 2 · 2018: 1 · 2017: 2 · 2016: 4 · 2015: 3 · 2014: 3 · 2013: 3 · 2012: 2
- FWCI
- 3.11
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Canadian Mineralogist (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
- Physical Sciences › Earth and Planetary Sciences › Geology › Geological Studies and Exploration
- Physical Sciences › Earth and Planetary Sciences › Geology › Geological and Geophysical Studies
- Keywords
- Grenville orogeny, Sveconorwegian orogen, granulite facies metamorphism, eclogite-facies metamorphism, Grenville Front, Rodinia, East European Craton, tectonic evolution, oceanic lithosphere subduction, island arc accretion, eclogite
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