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Mira Terrane

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Journal Article

Reply to the Discussion by Landing and Geyer on “The Terreneuvian MacCodrum Brook section, Mira terrane, Cape Breton Island, Nova Scotia, Canada: age constraints from ash layers, organic-walled microfossils, and trace fossils” Available to Purchase

Sandra M. Barr, Chris E. White, Teodoro Palacios, Sören Jensen, Deanne van Rooyen, James L. Crowley
Published: 21 June 2023
Canadian Journal of Earth Sciences (2023) 60 (9): 1356–1358.
DOI: https://doi.org/10.1139/cjes-2023-0056
... on Scatarie Island and nearby Hay Island, Avalonian Mira terrane, Cape Breton Island, Nova Scotia, Canada . Atlantic Geology , 56 : 257 – 279 . doi: 10.4138/atlgeol.2020.011 . Barr , S.M. , White , C.E. , Palacios , T. , Jensen , S. , van Rooyen , D. , and Crowley , J.L...
View PDF for article title, Reply to the Discussion by Landing and Geyer on “The Terreneuvian MacCodrum Brook section, <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Cape Breton Island, Nova Scotia, Canada: age constraints from ash layers, organic-walled microfossils, and trace fossils”
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Journal Article

Discussion: The Terreneuvian MacCodrum Brook section, Mira terrane, Cape Breton Island, Nova Scotia, Canada: age constraints from ash layers, organic-walled microfossils, and trace fossils Available to Purchase

Ed Landing, Gerd Geyer
Published: 19 May 2023
Canadian Journal of Earth Sciences (2023) 60 (9): 1349–1355.
DOI: https://doi.org/10.1139/cjes-2023-0031
... in the Avalonian strike-slip regime—on the marginal–inner platform transition just as the northern Antigonish Highlands and southeast Burin Peninsula. The Mira belt is a tectonic inlier not a “terrane” in the A–C orogen. Corresponding author: Ed Landing (email: [email protected]...
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View PDF for article title, Discussion: The Terreneuvian MacCodrum Brook section, <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Cape Breton Island, Nova Scotia, Canada: age constraints from ash layers, organic-walled microfossils, and trace fossils
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Add to Citation Manager for Discussion: The Terreneuvian MacCodrum Brook section, <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Cape Breton Island, Nova Scotia, Canada: age constraints from ash layers, organic-walled microfossils, and trace fossils
Journal Article

The Terreneuvian MacCodrum Brook section, Mira terrane, Cape Breton Island, Nova Scotia, Canada: age constraints from ash layers, organic-walled microfossils, and trace fossils Available to Purchase

Sandra M. Barr, Chris E. White, Teodoro Palacios, Sören Jensen, Deanne van Rooyen, James L. Crowley
Published: 12 October 2022
Canadian Journal of Earth Sciences (2023) 60 (3): 307–332.
DOI: https://doi.org/10.1139/cjes-2022-0044
... ; this study), and as a result, the age of the MacCodrum Formation has remained uncertain. Fig. 1. Simplified geological sketch map of the northern part of the Mira terrane, southeastern Cape Breton Island, redrawn using information from Barr et al. (1996 , 2020 ), showing the distribution...
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View PDF for article title, The Terreneuvian MacCodrum Brook section, <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Cape Breton Island, Nova Scotia, Canada: age constraints from ash layers, organic-walled microfossils, and trace fossils
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Journal Article

Origin and evolution of Avalonia: evidence from U–Pb and Lu–Hf isotopes in zircon from the Mira terrane, Canada, and the Stavelot–Venn Massif, Belgium Available to Purchase

A. P. Willner, S. M. Barr, A. Gerdes, H.-J. Massonne, C. E. White
Published: 24 July 2013
Journal of the Geological Society (2013) 170 (5): 769–784.
DOI: https://doi.org/10.1144/jgs2012-152
...A. P. Willner; S. M. Barr; A. Gerdes; H.-J. Massonne; C. E. White Abstract Laser ablation inductively coupled plasma mass spectrometry U–Pb and Lu–Hf isotope analyses of detrital zircon from Neoproterozoic–Cambrian clastic sedimentary rocks in the Mira terrane (Cape Breton Island, Nova Scotia...
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View PDF for article title, Origin and evolution of Avalonia: evidence from U–Pb and Lu–Hf isotopes in zircon from the <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Canada, and the Stavelot–Venn Massif, Belgium
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Add to Citation Manager for Origin and evolution of Avalonia: evidence from U–Pb and Lu–Hf isotopes in zircon from the <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Canada, and the Stavelot–Venn Massif, Belgium
Journal Article

Vein assemblages and fluid evolution in 18 O-depleted Neoproterozoic igneous rocks of the Mira terrane, Cape Breton Island, Nova Scotia 1 This article is one of a series of papers published in CJES Special Issue: In honour of Ward Neale on the theme of Appalachian and Grenvillian geology. 2 Laboratory for Stable Isotope Science (LSIS) Contribution 251. Available to Purchase

Joanna Potter, Frederick J. Longstaffe, Sandra M. Barr
Published: 05 January 2012
Canadian Journal of Earth Sciences (2012) 49 (1): 359–378.
DOI: https://doi.org/10.1139/e11-074
... the abundant vein networks of the Mira terrane, Cape Breton Island. Six categories of vein assemblages — from oldest to youngest — are present: ( i ) quartz–albite, ( ii ) quartz–epidote, ( iii ) quartz, ( iv ) quartz–chlorite–calcite, ( v ) quartz–calcite, and ( vi ) calcite. Vein system temperatures were...
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View PDF for article title, Vein assemblages and fluid evolution in 18 O-depleted Neoproterozoic igneous rocks of the <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Cape Breton Island, Nova Scotia 1 This article is one of a series of papers published in CJES Special Issue: In honour of Ward Neale on the theme of Appalachian and Grenvillian geology. 2 Laboratory for Stable Isotope Science (LSIS) Contribution 251.
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Add to Citation Manager for Vein assemblages and fluid evolution in 18 O-depleted Neoproterozoic igneous rocks of the <span class="search-highlight">Mira</span> <span class="search-highlight">terrane</span>, Cape Breton Island, Nova Scotia 1 This article is one of a series of papers published in CJES Special Issue: In honour of Ward Neale on the theme of Appalachian and Grenvillian geology. 2 Laboratory for Stable Isotope Science (LSIS) Contribution 251.
Journal Article

U–Pb geochronologic constraints on the volcanic evolution of the Mira (Avalon) terrane, southeastern Cape Breton Island, Nova Scotia Free

Mary Lou Bevier, Sandra M. Barr, Chris E. White, Alan S. Macdonald
Published: 01 January 1993
Canadian Journal of Earth Sciences (1993) 30 (1): 1–10.
DOI: https://doi.org/10.1139/e93-001
...Mary Lou Bevier; Sandra M. Barr; Chris E. White; Alan S. Macdonald Abstract New U–Pb ages for late Precambrian volcanic and associated plutonic units in the Mira (Avalon) terrane of southeastern Cape Breton Island indicate that volcanic suites were erupted over a span of at least 100 Ma. The oldest...
Add to Citation Manager for U–Pb geochronologic constraints on the volcanic evolution of the <span class="search-highlight">Mira</span> (Avalon) <span class="search-highlight">terrane</span>, southeastern Cape Breton Island, Nova Scotia
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Simplified geological sketch map of the northern part of the Mira terrane, southeastern Cape Breton Island, redrawn using information from Barr et al. (1996, 2020), showing the distribution of Neoproterozoic, Cambrian, and Carboniferous rocks and the location of MacCodrum Brook. Inset map shows the location of the Mira terrane and map area in the context of northern Appalachian domains, redrawn after Hibbard et al. (2006). A = Avalonia, G = Ganderia, L = Laurentian margin, M = Meguma, PL = peri-Laurentian arcs.

Simplified geological sketch map of the northern part of the Mira terrane, ... Available to Purchase

Published: 12 October 2022
Fig. 1. Simplified geological sketch map of the northern part of the Mira terrane, southeastern Cape Breton Island, redrawn using information from Barr et al. (1996 , 2020 ), showing the distribution of Neoproterozoic, Cambrian, and Carboniferous rocks and the location of MacCodrum Brook. Inset
Image
Figure 4.

Rb–Sr mineral isochrons for two samples from the Mira terrane: data-point e... Available to Purchase

Published: 11 November 2014
Figure 4. Rb–Sr mineral isochrons for two samples from the Mira terrane: data-point error crosses are 2σ; m – current range (Å) on a magnetic separator at which a certain fraction is magnetic.
Image
Schematic stratigraphic columns for the Mira terrane and the Stavelot–Venn Massif showing U–Pb ages with 2σ errors for magmatic and youngest detrital zircon from this and previously published work. Stratigraphic columns in Mira terrane are modified from Barr et al. (1996), and the column for the Stavelot–Venn massif is according to Vanguestaine (1992).The time scale is that of Ogg et al. (2008), except that the threefold division of the Cambrian has been retained for consistency with previously published work.

Schematic stratigraphic columns for the Mira terrane and the Stavelot–Venn ... Available to Purchase

Published: 24 July 2013
Fig. 6. Schematic stratigraphic columns for the Mira terrane and the Stavelot–Venn Massif showing U–Pb ages with 2σ errors for magmatic and youngest detrital zircon from this and previously published work. Stratigraphic columns in Mira terrane are modified from Barr et al. (1996
Journal Article

Contrasting U–Pb ages from plutons in the Bras d'Or and Mira terranes of Cape Breton Island, Nova Scotia Free

S. M. Barr, G. R. Dunning, R. P. Raeside, R. A. Jamieson
Published: 01 September 1990
Canadian Journal of Earth Sciences (1990) 27 (9): 1200–1208.
DOI: https://doi.org/10.1139/e90-127
...S. M. Barr; G. R. Dunning; R. P. Raeside; R. A. Jamieson Abstract U–Pb dates from zircon, titanite, and monazite in plutons of the Bras d'Or and Mira terranes of southern Cape Breton Island, combined with 40 Ar/ 39 Ar and other radiometric age data, indicate that the Bras d'Or and Mira terranes had...
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Journal Article

Contrasting U–Pb ages from plutons in the Bras d'Or and Mira terranes of Cape Breton Island, Nova Scotia: Discussion Free

J. Duncan Keppie, R. D. Dallmeyer
Published: 01 September 1991
Canadian Journal of Earth Sciences (1991) 28 (9): 1493–1494.
DOI: https://doi.org/10.1139/e91-131
Add to Citation Manager for Contrasting U–Pb ages from plutons in the Bras d&#x27;Or and <span class="search-highlight">Mira</span> <span class="search-highlight">terranes</span> of Cape Breton Island, Nova Scotia: Discussion
Journal Article

Contrasting U–Pb ages from plutons in the Bras d'Or and Mira terranes of Cape Breton Island, Nova Scotia: Reply Free

S. M. Barr, G. R. Dunning, R. P. Raeside, R. A. Jamieson
Published: 01 September 1991
Canadian Journal of Earth Sciences (1991) 28 (9): 1495–1497.
DOI: https://doi.org/10.1139/e91-132
Add to Citation Manager for Contrasting U–Pb ages from plutons in the Bras d&#x27;Or and <span class="search-highlight">Mira</span> <span class="search-highlight">terranes</span> of Cape Breton Island, Nova Scotia: Reply
Journal Article

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

ARNE P. WILLNER, SANDRA M. BARR, JOHANNES GLODNY, HANS-JOACHIM MASSONNE, MASAFUMI SUDO, STUART N. THOMSON, CEES R. VAN STAAL, CHRIS E. WHITE
Published: 11 November 2014
Geological Magazine (2015) 152 (5): 767–787.
DOI: https://doi.org/10.1017/S0016756814000508
...Figure 4. Rb–Sr mineral isochrons for two samples from the Mira terrane: data-point error crosses are 2σ; m – current range (Å) on a magnetic separator at which a certain fraction is magnetic. ...
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View PDF for article title, Effects of fluid flow, cooling and deformation as recorded by 40 Ar/ 39 Ar, Rb–Sr and zircon fission track ages in very low- to low-grade metamorphic rocks in Avalonian SE Cape Breton Island (Nova Scotia, Canada)
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Journal Article

Geological correlations between Cape Breton Island and Newfoundland, northern Appalachian orogen Free

S M Barr, R P Raeside, C E White
Published: 01 November 1998
Canadian Journal of Earth Sciences (1998) 35 (11): 1252–1270.
DOI: https://doi.org/10.1139/e98-016
...S M Barr; R P Raeside; C E White Abstract Geological correlations between Cape Breton Island and Newfoundland are apparent both in surface geology and at deeper crustal levels, based on similarities in Sm-Nd isotopic signatures. The Mira terrane of southeastern Cape Breton Island is part...
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Journal Article

Geology and tectonic development of the Bras d'Or suspect terrane, Cape Breton Island, Nova Scotia Free

Robert P. Raeside, Sandra M. Barr
Published: 01 October 1990
Canadian Journal of Earth Sciences (1990) 27 (10): 1371–1381.
DOI: https://doi.org/10.1139/e90-147
... docked with the Mira Terrane to the southeast no earlier than the Ordovician. Cambro-Ordovician sedimentary rocks of the Mira Terrane appear locally to be thrust over the Bras d'Or Terrane. Mississippian sedimentary rocks overlap both terranes. The present boundary, the Macintosh Brook Fault, is mainly...
Add to Citation Manager for Geology and tectonic development of the Bras d&#x27;Or suspect <span class="search-highlight">terrane</span>, Cape Breton Island, Nova Scotia
Journal Article

Detrital zircon geochronology of a conglomerate in the northeastern Cape Breton Highlands: implications for the relationships between terranes in Cape Breton Island, the Canadian Appalachians Free

Ya-Dong Chen, Shoufa Lin, Cees R. van Staal
Published: 01 February 1995
Canadian Journal of Earth Sciences (1995) 32 (2): 216–223.
DOI: https://doi.org/10.1139/e95-018
..., and Cadomian ages match published ages from the Bras d'Or terrane (and its correlatives) and the Mira terrane (and its correlatives), and indicate provenance of the conglomerate from both terranes. They also indicate that the Bras d'Or and Mira terranes had been connected by the time of deposition...
Add to Citation Manager for Detrital zircon geochronology of a conglomerate in the northeastern Cape Breton Highlands: implications for the relationships between <span class="search-highlight">terranes</span> in Cape Breton Island, the Canadian Appalachians
Journal Article

Regional 18 O-depletion of Neoproterozoic igneous rocks from Avalonia, Cape Breton Island and southern New Brunswick, Canada Available to Purchase

J. Potter, F.J. Longstaffe, S.M. Barr
Journal: GSA Bulletin
Published: 01 March 2008
GSA Bulletin (2008) 120 (3-4): 347–367.
DOI: https://doi.org/10.1130/B26191.1
...J. Potter; F.J. Longstaffe; S.M. Barr Abstract Neoproterozoic igneous rocks of the Avalonian Mira terrane, Cape Breton Island, and Caledonia terrane, southern New Brunswick, have experienced regional 18 O-depletion. The majority of these rocks have δ 18 O WR values between −1 and +6‰, markedly...
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View PDF for article title, Regional 18 O-depletion of Neoproterozoic igneous rocks from Avalonia, Cape Breton Island and southern New Brunswick, Canada
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Nd isotopic characteristics of terranes within the Avalon Zone, southern New Brunswick Available to Purchase

Scott D. Samson, Sandra M. Barr, Chris E. White
Published: 18 July 2000
Canadian Journal of Earth Sciences (2000) 37 (7): 1039–1052.
DOI: https://doi.org/10.1139/e00-015
... for sedimentary rocks range from −8.4 to +3.6. A granite within the Kingston terrane has ε Nd (438 Ma) = +4.0. Nd isotopic compositions for the Kingston and Caledonia terranes are similar to those of the Mira terrane in Cape Breton Island, the Antigonish Highlands of Nova Scotia, and plutonic rocks of eastern...
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View PDF for article title, Nd isotopic characteristics of <span class="search-highlight">terranes</span> within the Avalon Zone, southern New Brunswick
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Altering Avalonia: oxygen isotopes and terrane distinction in the Appalachian peri-Gondwanan realm Laboratory for Stable Isotope Science (LSIS), The University of Western Ontario, Contribution 236. Available to Purchase

Joanna Potter, Frederick J. Longstaffe, Sandra M. Barr, Margaret D. Thompson, Chris E. White
Published: 26 August 2008
Canadian Journal of Earth Sciences (2008) 45 (7): 815–825.
DOI: https://doi.org/10.1139/E08-024
... terrane have the lowest δ 18 O WR values (≥–3.1‰), followed by the Mira terrane in Cape Breton Island and the Caledonia terrane in New Brunswick (≥–1.2‰), the Avalon terrane in Newfoundland (≥+2.8‰), and the Antigonish Highlands in Nova Scotia (≥+5.3‰). In contrast, this depletion of 18 O is observed...
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View PDF for article title, Altering Avalonia: oxygen isotopes and <span class="search-highlight">terrane</span> distinction in the Appalachian peri-Gondwanan realm Laboratory for Stable Isotope Science (LSIS), The University of Western Ontario, Contribution 236.
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Journal Article

Tectono-stratigraphic terranes in Cape Breton Island, Nova Scotia: Implications for the configuration of the northern Appalachian orogen Available to Purchase

Sandra M. Barr, Robert P. Raeside
Journal: Geology
Published: 01 September 1989
Geology (1989) 17 (9): 822–825.
DOI: https://doi.org/10.1130/0091-7613(1989)017<0822:TSTICB>2.3.CO;2
...-Early Cambrian plutons, may be correlative with units previously included in the Gander terrane in southern Newfoundland and the Avalon terrane in southern New Brunswick. The Mira terrane in southeastern Cape Breton Island, including late Precambrian to Early Cambrian volcanic and sedimentary sequences...
View PDF for article title, Tectono-stratigraphic <span class="search-highlight">terranes</span> in Cape Breton Island, Nova Scotia: Implications for the configuration of the northern Appalachian orogen
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