Cees R. van Staal

Geological Survey of Canada

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N Rogers

Natural Resources Canada

V J McNicoll

Natural Resources Canada

A Zagorevski

Natural Resources Canada

Shoufa Lin

Dalian Ocean University

Alexandre Zagorevski

Geological Survey of Canada

William C. McClelland

University of Iowa

Pablo Valverde-Vaquero

Instituto Geológico y Minero de España

L. R. Fyffe

Government of New Brunswick

S Castonguay

Natural Resources Canada

J. A. Winchester

Keele University

Cooperative Institutions

Geological Survey of Canada

Natural Resources Canada

Memorial University of Newfoundland

United States Geological Survey

Government of Newfoundland and Labrador

Chinese Academy of Sciences

University of Waterloo

University of Toronto

University of British Columbia

Government of New Brunswick

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Middle Cambrian to Ordovician Arc - Back-arc Development on the Leading Edge of Ganderia, Newfoundland Appalachians

AGUFM (2008)

A Zagorevski Cees R. van Staal N Rogers V McNicoll

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Geology of the mid-coast region of British Columbia near Klemtu (parts of Laredo Sound map area, NTS 103A/08, 09, 15 and 16)

J L Nelson L J Diakow Stattegger Karl J. Brian Mahoney George E. Gehrels

10.4095/288143

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Does the Birchy Complex of Newfoundland extend into Ireland?

Journal of the Geological Society (1992)

J. A. Winchester Harold Williams M. D. Max Cees R. van Staal

Metabasalts from the Birchy Complex in Newfoundland are chemically similar to the Kill-Callow suite of metabasalts in Co. Mayo, Ireland. The latter, which are also chemically akin to Cambrian amphibolites of the Highland Border Series of Scotland, lie along the shear zone associated with the Fair Head-Clew Bay line, which has been equated with the Baie Verte-Brompton line in Newfoundland. The Birchy Complex occupies an analogous tectonic position along the Baie Verte-Brompton line and hence we postulate that chemical similarities suggest a correlation between the Birchy Complex of Newfoundland and the Kill-Callow suite of Ireland.

10.1144/gsjgs.149.2.0159

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The P–T path of eclogites in the St. Cyr klippe, Yukon, Canada: Permian metamorphism of a coherent high-pressure unit in an accreted terrane of the North American Cordillera

European Journal of Mineralogy (2016)

Meredith Blair Petrie Hans‐Joachim Massonne Jane A. Gilotti William C. McClelland Cees R. van Staal

10.1127/ejm/2016/0028-2576

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Citations (16)

Effects of fluid flow, cooling and deformation as recorded by ⁴⁰Ar/³⁹Ar, Rb–Sr and zircon fission track ages in very low- to low-grade metamorphic rocks in Avalonian SE Cape Breton Island (Nova Scotia, Canada)

Geological Magazine (2014)

Arne P. Willner Sandra M. Barr Johannes Glodny Hans‐Joachim Massonne Masafumi Sudo

Abstract 40 Ar/ 39 Ar in situ UV laser ablation of white mica, Rb–Sr mineral isochrons and zircon fission track dating were applied to determine ages of very low- to low-grade metamorphic processes at 3.5±0.4 kbar, 280±30°C in the Avalonian Mira terrane of SE Cape Breton Island (Nova Scotia). The Mira terrane comprises Neoproterozoic volcanic-arc rocks overlain by Cambrian sedimentary rocks. Crystallization of metamorphic white mica was dated in six metavolcanic samples by 40 Ar/ 39 Ar spot age peaks between 396±3 and 363±14 Ma. Rb–Sr systematics of minerals and mineral aggregates yielded two isochrons at 389±7 Ma and 365±8 Ma, corroborating equilibrium conditions during very low- to low-grade metamorphism. The dated white mica is oriented parallel to foliations produced by sinistral strike-slip faulting and/or folding related to the Middle–Late Devonian transpressive assembly of Avalonian terranes during convergence and emplacement of the neighbouring Meguma terrane. Exhumation occurred earlier in the NW Mira terrane than in the SE. Transpression was related to the closure of the Rheic Ocean between Gondwana and Laurussia by NW-directed convergence. The 40 Ar/ 39 Ar spot age spectra also display relict age peaks at 477–465 Ma, 439 Ma and 420–428 Ma attributed to deformation and fluid access, possibly related to the collision of Avalonia with composite Laurentia or to earlier Ordovician–Silurian rifting. Fission track ages of zircon from Mira terrane samples range between 242±18 and 225±21 Ma and reflect late Palaeozoic reburial and reheating close to previous peak metamorphic temperatures under fluid-absent conditions during rifting prior to opening of the Central Atlantic Ocean.

Isochron dating

10.1017/s0016756814000508

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Sedimentological studies in the Ordovician Miramichi, Tetagouche, and Fournier Groups in the Bathurst Camp and the Belledune-Elmtree Inlier, northern New Brunswick

R. J. Rice Cees R. van Staal

10.4095/132901

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Report of activities for ancient faults and their controls on mineralization in northern British Columbia and southern Yukon: GEM2 Cordillera Project

James J. Ryan Cees R. van Staal James W. Haggart J L Nelson

10.4095/295503

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Metallogeny

Geological Society of America eBooks (2015)

H S Swinden S M Dunsworth Georges Beaudoin R. C. Boehner J.L. Davies

This volume focuses on the highly populated Canadian Appalachian region. The chapter on the East Greenland Caledonides stands alone and there is no attempt to integrate the geological accounts of the two far removed regions. Rocks of the Canadian Appalachian region are described under four broad temporal divisions: lower Paleozoic and older, middle Paleozoic, upper Paleozoic, and Mesozoic. The rocks of these temporal divisions define geographic zones, belts, basins, and graben, respectively. The area is of special interest because so many modern concepts of mountain building are based on Appalachian rocks and structures.

Metallogeny

Devonian

10.1130/dnag-gna-f1.681

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Citations (2)

Arc - arc collisional tectonics within the Central Mobile Belt of the Newfoundland Appalachians

AGU Fall Meeting Abstracts (2007)

A Zagorevski N Rogers Cees R. van Staal V J McNicoll Pablo Valverde-Vaquero

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Tectonic evolution of high grade metamorphic tectonites of the Meelpaeg structure near Port aux Basques, southwestern Newfoundland during the Silurian Salinic and Early to Middle Devonian Acadian orogenies

Canadian Journal of Earth Sciences (2024)

Cees R. van Staal Shoufa Lin Pablo Valverde-Vaquero Greg Dunning James Howard Burgess

The Meelpaeg structure in southwestern Newfoundland comprises allochthonous tectonites formed during the Salinic (D 1-2 ) and Acadian (D 3 ) orogenies. D 1-2 occurred between 451 and 417 Ma and culminated in Barrovian metamorphism during terminal collision of the Gander margin with composite Laurentia. Collision was followed by tectonic escape of the deeply buried rocks between 417 and 412 Ma. Rocks of the Victoria arc and Exploits backarc preserved in the Port aux Basques and Grand Bay complexes were emplaced during D 1 by the Grandys River shear zone, which is outlined by a narrow band of the ca. 451 Ma Port aux Basques granite, towards the southeast above the Harbour le Cou Group. The contrasting histories displayed across the Grandys River shear zone are typical of the Dog Bay Line further northeast. Salinic structures were overprinted by faults and folds formed during Acadian D 3 transpression (≤412 Ma), which produced the bi-vergent Meelpaeg structure and emplacement of amphibolite facies tectonites above greenschist facies rocks along its bounding shear zones. F 3 folding progressively steepened the faults, which in turn led to progressive localization of dextral strike–slip in narrow fault zones. The high grade of metamorphism in the Meelpaeg structure is attributed to protracted underthrusting of the Cabot promontory of the Gander margin beneath composite Laurentia. Salinic convergence was sinistral but became dextral during the Early Devonian, diachronous Acadian orogeny. The kinematic switch is proposed as a tool to separate Salinic from Acadian structures in the central part of the northern Appalachians.

Tectonite

Devonian

10.1139/cjes-2023-0141

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Citations (3)