Manikewan: An early proterozoic ocean in central Canada, its igneous history and orogenic closure

Stauffer, Mel R.

doi:10.1016/0301-9268(84)90036-6

Cited by 139 publications

(41 citation statements)

References 14 publications

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“…The method of source characterization presented in chapter 2 has been used to study the gravity anomalies over the Churchill-Superior boundary zone and the Tabbernor fault . The Reindeer tectonic zone [Stauffer, 1984] is a 400km wide collage of early Proterozoic arc volcanics, plutons and sediments: (1) the Rottenstone domain comprises the andean-type 1.8 Ga Wathaman batholith [Meyer et al, 1992] and the Rotten- …”

Section: Wavelets Methodsmentioning

confidence: 99%

Analysis of gravity and magnetic fields in the Canadian Shield using standard and wavelet-based methods

Bourlon¹

2004

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Section: Wavelets Methodsmentioning

confidence: 99%

Analysis of gravity and magnetic fields in the Canadian Shield using standard and wavelet-based methods

Bourlon¹

2004

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“…The internides of the THO, named the Reindeer zone, formed during the closure of the 5000-km-wide Manikewan Ocean (Stauffer 1984;Symons et al 1995) that existed between the Superior and the Rae-Hearne provinces. Based on U-Pb dating, the ocean opened at about 2.1 Ga (Halls and Heaman 1997) and closed at about 1.8 Ga, corresponding to the collisional phase of the orogen.…”

Section: Geological Contextmentioning

confidence: 99%

“…During the decade 1984, the Geological Survey of Canada (GSC), and Lithoprobe undertook magnetotelluric (MT) measurements at more than 200 locations in Saskatchewan to study the enigmatic North American Central Plains (NACP) conductivity anomaly and its relationship with the Paleoproterozoic Trans-Hudson orogen (THO). This anomaly in enhanced conductivity was detected for the first time during the late 1960s and since then has motivated a number of electromagnetic (EM) studies (for a review, see Jones et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic image of the Trans-Hudson orogen THO94 transect

García

Jones

2005

Can. J. Earth Sci.

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Abstract:The North American Central Plains (NACP) anomaly in enhanced electric conductivity and its relationship with the Paleoproterozoic Trans-Hudson orogen (THO) has been studied under the auspices of Lithoprobe for over a decade. The NACP anomaly was the first geophysical evidence of the existence of the THO beneath the Phanerozoic sediments of the Central Plains. This anomaly, detected geomagnetically in the late 1960s, has been the subject of a number magnetotelluric studies from the early 1980s. The PanCanadian and Geological Survey of Canada experiments in the 1980s and the Lithoprobe experiments in the 1990s together comprise four east-west and one north-south regional-scale profiles in Saskatchewan perpendicular to the strike of the orogen. In this paper, data from the northernmost line, coincident with seismic line S2B, are analysed and interpreted, and are shown to be key in determining the northern extension of the NACP anomaly. Dimensionality analysis confirms the rotation of deep crustal structures eastward to Hudson Bay, as earlier proposed on the basis of broad-scale geomagnetic studies. On this profile, as with the profile at the edge of the Paleozoic sediments, the NACP anomaly is imaged as lying within the La Ronge domain, in contact with the Rottenstone domain, and structurally above the Guncoat thrust, a late compressional feature. The location of the anomaly together with the surface geology suggests that the anomaly is caused either by sulphide mineralization concentrated in the hinges of folds, by graphite, or by a combination of both. Our interpretation of the data is consistent with that from other profiles, and suggests that the NACP anomaly was formed as a consequence of subduction and collisional processes involving northward subduction of the internides of the THO beneath the Hearne craton. On the southern part of this profile, a resistive structure is identified as the Sask craton, suggesting that Proterozoic rocks are above Archean rocks in the THO. 493Résumé : L'anomalie des plaines du centre de l'Amérique du Nord en conductivité électrique amplifiée et sa relation avec l'orogène trans-hudsonien (Paléoprotérozoïque) ont été étudiées dans le cadre du projet Lithoprobe depuis plus d'une décennie. Cette anomalie a été la première évidence géophysique de l'existence de l'orogène trans-hudsonien sous les sédiments phanérozoïques des plaines centrales. Cette anomalie, détectée par des techniques géomagnétiques à la fin des années 1960, a été le sujet de nombreuses études magnétotelluriques (MT) à partir du début des années 1980. Les expériences de PanCanadian et de la Commission géologique du Canada dans les années 1980, ainsi que celles du projet Lithoprobe dans les années 1990, comprennent ensemble, à l'échelle régionale, en Saskatchewan, quatre profils est-ouest et un profil nord-sud qui sont perpendiculaires à la direction de l'orogène. Dans cet article, les données de la ligne la plus au nord, coïncidant avec la ligne sismique S2B, sont analysées et interprétées; elles s'avèrent ...

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“…Recent studies (Lewry andSibbald, 1978, 1980;Stauffer, 1984;Lewry and others, 1985;and Green and others, 1985) described the component terranes of the Trans-Hudson orogenic belt and proposed genetic models. They described (figs.…”

Section: Geology Of the Trans-hudson Orogenic Beltmentioning

confidence: 99%

“…The Thompson-Fox River belt is separated from the Kisseynew belt by a well defined fault zone, the Setting Lake-Moak Lake shear zone (Stauffer, 1984).…”

Section: Thompson-fox River Beltmentioning

confidence: 99%

Southern extension of the Churchill Province (Trans-Hudson orogenic belt) Midcontinent Strategic and Critical Minerals Project, 1985 workshop report

Anderson¹

1987

Open-File Report

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Manikewan: An early proterozoic ocean in central Canada, its igneous history and orogenic closure

Cited by 139 publications

References 14 publications

Analysis of gravity and magnetic fields in the Canadian Shield using standard and wavelet-based methods

Analysis of gravity and magnetic fields in the Canadian Shield using standard and wavelet-based methods

Electromagnetic image of the Trans-Hudson orogen THO94 transect

Southern extension of the Churchill Province (Trans-Hudson orogenic belt) Midcontinent Strategic and Critical Minerals Project, 1985 workshop report

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Manikewan: An early proterozoic ocean in central Canada, its igneous history and orogenic closure

Cited by 139 publications

References 14 publications

Analysis of gravity and magnetic fields in the Canadian Shield using standard and wavelet-based methods

Analysis of gravity and magnetic fields in the Canadian Shield using standard and wavelet-based methods

Electromagnetic image of the Trans-Hudson orogen  THO94 transect

Southern extension of the Churchill Province (Trans-Hudson orogenic belt) Midcontinent Strategic and Critical Minerals Project, 1985 workshop report

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Electromagnetic image of the Trans-Hudson orogen THO94 transect