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Uvauk Complex

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Journal Article

Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada Available to Purchase

A.J. Mills, R.G. Berman, W.J. Davis, S. Tella, C. Roddick, S. Hanmer S. Carr
Published: 13 April 2007
Canadian Journal of Earth Sciences (2007) 44 (2): 245–266.
DOI: https://doi.org/10.1139/e06-080
...A.J. Mills; R.G. Berman; W.J. Davis; S. Tella; C. Roddick; S. Hanmer S. Carr Abstract The Uvauk complex is an ultramylonite-bounded, granulite-facies suite of anorthosite–gabbro that forms part of the Chesterfield Inlet segment of the Snowbird tectonic zone. Following initial anorthosite–gabbro...
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View PDF for article title, Thermobarometry and geochronology of the <span class="search-highlight">Uvauk</span> <span class="search-highlight">complex</span>, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada
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Geology of the western Uvauk complex, showing representative structural elements and sample locations referred to in the text, sz, shear zone.

Geology of the western Uvauk complex, showing representative structural ele... Available to Purchase

Published: 13 April 2007
Fig. 3. Geology of the western Uvauk complex, showing representative structural elements and sample locations referred to in the text, sz, shear zone.
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Dykes within the Uvauk complex. (a) East-trending, fine-grained, generally concordant, granulite-facies mafic dykes that make up nearly 40% of the metaigneous suite by volume (view looking east). (b) Rare chilled margins confirm the mafic layers in (a) are dykes. Coin for scale. (c) Preservation of bayonette-like apophyses and obliquity of dyke margins to the anorthosite foliation imply late-stage dyke emplacement. Coin for scale. (d) One dyke crosscuts regional fabrics and similar dykes, suggesting that dyke emplacement outlasted deformation. (e) Layers of anorthosite and mafic granulite dyke isoclinally folded: foliation within the anorthosite is folded, whereas the dyke has a weakly developed foliation that is axial planar to the fold. Lens cap for scale. (f) The weak axial planar foliation in mafic bands of (e) is defined by elongate garnet pseudomorphs and aligned hornblende that wrap the pseudomorphs (axial plane is parallel to width of photomicrograph; field of view is 5.2 mm).

Dykes within the Uvauk complex. ( a ) East-trending, fine-grained, generall... Available to Purchase

Published: 13 April 2007
Fig. 4. Dykes within the Uvauk complex. ( a ) East-trending, fine-grained, generally concordant, granulite-facies mafic dykes that make up nearly 40% of the metaigneous suite by volume (view looking east). ( b ) Rare chilled margins confirm the mafic layers in ( a ) are dykes. Coin for scale. ( c
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U–Pb analytical data for samples collected from the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 2. U–Pb analytical data for samples collected from the Uvauk complex. Atomic ratios e Apparent age (Ma) Fraction a Wt. (μg) b U (ppm) Pb* (ppm) c Pb c (pg) d Sample 98TXM334b (Z5822): Uvauk
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U–Pb analytical data for samples collected from the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 2. U–Pb analytical data for samples collected from the Uvauk complex. Atomic ratios e Apparent age (Ma) Fraction a Wt. (μg) b U (ppm) Pb* (ppm) c Pb c (pg) d Sample 98TXM334b (Z5822): Uvauk
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U–Pb analytical data for samples collected from the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 2. U–Pb analytical data for samples collected from the Uvauk complex. Atomic ratios e Apparent age (Ma) Fraction a Wt. (μg) b U (ppm) Pb* (ppm) c Pb c (pg) d Sample 98TXM334b (Z5822): Uvauk
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U–Pb analytical data for samples collected from the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 2. U–Pb analytical data for samples collected from the Uvauk complex. Atomic ratios e Apparent age (Ma) Fraction a Wt. (μg) b U (ppm) Pb* (ppm) c Pb c (pg) d Sample 98TXM334b (Z5822): Uvauk
Image

U–Pb analytical data for samples collected from the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 2. U–Pb analytical data for samples collected from the Uvauk complex. Atomic ratios e Apparent age (Ma) Fraction a Wt. (μg) b U (ppm) Pb* (ppm) c Pb c (pg) d Sample 98TXM334b (Z5822): Uvauk
Image

U–Pb analytical data for samples collected from the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 2. U–Pb analytical data for samples collected from the Uvauk complex. Atomic ratios e Apparent age (Ma) Fraction a Wt. (μg) b U (ppm) Pb* (ppm) c Pb c (pg) d Sample 98TXM334b (Z5822): Uvauk
Image

U–Pb analytical data for samples collected from the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 2. U–Pb analytical data for samples collected from the Uvauk complex. Atomic ratios e Apparent age (Ma) Fraction a Wt. (μg) b U (ppm) Pb* (ppm) c Pb c (pg) d Sample 98TXM334b (Z5822): Uvauk
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Summary of P – T and geochronology constraints for the Uvauk complex. ... Available to Purchase

Published: 13 April 2007
Table 3. Summary of P – T and geochronology constraints for the Uvauk complex. P – T a Lithology Location Sample No. Peak Postpeak Age (Ma) Leucogabbro Uvauk complex 98TXM334b (igneous; upper intercept, zircon) Plutonism and (or) M0 metamorphism
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Regional geologic map of western Canadian Shield. AB, Athabasca basin; AL, Atzinging Lake; BB, Black Bay; BkL, Bonokoski Lake; BL, Baker Lake basin; DX, Daly Bay complex; KX, Kramanituar complex; LL, Legs Lake shear zone; NB, Neil Bay; TB, Thelon basin; THO, Trans-Hudson Orogen; TL, Thicke Lake; TMZ, Taltson magmatic zone; TO, Thelon Orogen: TS, Tyrell shear zone; STZ, Snowbird Tectonic Zone; UX, Uvauk complex; VR, Virgin River shear zone; WL, Wholdaia Lake. Modified from Tella et al. (2000).

Regional geologic map of western Canadian Shield. AB, Athabasca basin; AL, ... Available to Purchase

Published: 05 September 2003
, Thicke Lake; TMZ, Taltson magmatic zone; TO, Thelon Orogen: TS, Tyrell shear zone; STZ, Snowbird Tectonic Zone; UX, Uvauk complex; VR, Virgin River shear zone; WL, Wholdaia Lake. Modified from Tella et al. ( 2000 ).
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P–T results. (a) Mafic dyke (sample 98TXM342). Composition plot corresponds to Grt and Pl shown in SEM image. P–T plot shows results based on garnet core compositions. (b) Grt-bearing anorthositic gabbro (sample 99TXM561b). The dotted line (indicated in both the SEM image and the composition profile) roughly marks the interface between the low-CaO core and the high-CaO rim in Grt. The P–T plot, lower left, shows results for inner rim calculations. (c) Quartzofeldspathic (Qf) gneiss (sample 98TXM178d). Composition plot (lower right) corresponds to the Grt porphyroblast shown in the backscatter SEM image. Note the abrupt increase in CaO (XGrs) at the Grt rim in the composition profile (lower right) and SEM image (lower left). The P–T plot shows results for core calculations. (d) Amphibolite from south of the Uvauk complex anorthosite suite (sample 98TXM201). Composition plot (upper right) corresponds to the Grt porphyroblast shown in the SEM image. Note the marked increase in CaO content (XGrs) at the core–rim interface, demarcated by the dotted line. The P–T plot shows results based on rim compositions.

P – T results. ( a ) Mafic dyke (sample 98TXM342). Composition plot corres... Available to Purchase

Published: 13 April 2007
in the backscatter SEM image. Note the abrupt increase in CaO ( X Grs ) at the Grt rim in the composition profile (lower right) and SEM image (lower left). The P – T plot shows results for core calculations. ( d ) Amphibolite from south of the Uvauk complex anorthosite suite (sample 98TXM201). Composition plot
Journal Article

Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny Available to Purchase

R.G. Berman, W.J. Davis, S. Pehrsson
Journal: Geology
Published: 01 October 2007
Geology (2007) 35 (10): 911–914.
DOI: https://doi.org/10.1130/G23771A.1
.... The Kramanituar complex comprises 1.902 Ga anorthosite and enriched mid-ocean ridge basalt–type gabbro that were mylonitized at 13 kbar and underwent rapid decompression and cooling through rutile closure by 1.898 Ga ( Sanborn-Barrie et al., 2001 ). The Uvauk complex (Fig. 1B) has a similar high- P history...
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View PDF for article title, Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny
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Figure 1. A: Tectonic sketch of part of Canadian shield. S1 marks 1.88–1.865 Ga suture; inset shows location of A in North America. B: Simplified metamorphic map of western Churchill Province, showing four distinct pressure-age zones (1–4 in circles). Numbers in squares show sample localities. Letters in circles show locations discussed in text. A-A′—cross section shown in Figure 2. Cb—Chesterfield block; CB—Cumberland Batholith; MI—Meta Incognita terrane; THO—Trans-Hudson orogen; Tmz—Taltson magmatic zone; WB—Wathaman Batholith; AL—Angikuni Lake; BL—Baker Lake; CHsb—central Hearne supracrustal belt; HLsz—Happy Lake shear zone; MB—Manitoba; SK—Saskatchewan; STZ—Snowbird tectonic zone. Granulite complexes: DB—Daly Bay; KC—Kramanituar; UC—Uvauk.

Figure 1. A: Tectonic sketch of part of Canadian shield. S1 marks 1.88–1.86... Available to Purchase

Published: 01 October 2007
supracrustal belt; HLsz—Happy Lake shear zone; MB—Manitoba; SK—Saskatchewan; STZ—Snowbird tectonic zone. Granulite complexes: DB—Daly Bay; KC—Kramanituar; UC—Uvauk.
Journal Article

Retro-arc extension and continental rifting: a model for the Paleoproterozoic Baker Lake Basin, Nunavut 1 Geological Survey of Canada Contribution 20100436. Available to Purchase

T. Hadlari, R.H. Rainbird
Published: 08 August 2011
Canadian Journal of Earth Sciences (2011) 48 (8): 1232–1258.
DOI: https://doi.org/10.1139/e11-002
... comprises ca. 1.9 Ga gabbro, anorthosite, and granitoids ( Sanborn-Barrie et al. 2001 ). Eastward along Chesterfield Inlet, the Uvauk Complex (UCX; Fig. 1 ) is a similar ca. 1.9 Ga granulite-facies metamorphic complex, but also contains ca. 2.6 Ga anorthosite ( Mills 2001 ; Mills et al. 2007...
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View PDF for article title, Retro-arc extension and continental rifting: a model for the Paleoproterozoic Baker Lake Basin, Nunavut 1 Geological Survey of Canada Contribution 20100436.
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Journal Article

A Geo-Experimental Diagram for Garnet Amphibolite and Its Bearing on the Origin of Continents Available to Purchase

Robert C. Newton
Published: 01 September 2018
The Journal of Geology (2018) 126 (5): 531–539.
DOI: https://doi.org/10.1086/698820
.... ; Berman , R. ; Davis , W. J. ; Tella , S. ; Carr , S. ; Roddick , C. ; and Hanmer , S. 2007 . Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada . Can. J. Earth Sci...
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Journal Article

U/Pb geochronological constraints on Neoarchean tectonism: multiple compressional events in the northwestern Hearne Domain, Western Churchill Province, Canada Available to Purchase

Kate MacLachlan, William J. Davis, Carolyn Relf
Published: 10 February 2005
Canadian Journal of Earth Sciences (2005) 42 (1): 85–109.
DOI: https://doi.org/10.1139/e04-104
... and thermochronology by the 40 Ar/ 39 Ar method , Oxford Monographs on geology and geophysics #9 , Oxford University Press , Oxford, United Kingdom , 212 p. Mills A. Berman R. Hanmer S. Davis W.J. 2000 . Tectonometamorphic history of the Uvauk Complex, Nunavut . GeoCanada 2000...
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View PDF for article title, U/Pb geochronological constraints on Neoarchean tectonism: multiple compressional events in the northwestern Hearne Domain, Western Churchill Province, Canada
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Journal Article

Pangaean megalineaments: geophysical indications for the existence of Laurentian counterparts of the 6000 km Trans-Saharan Tibesti Lineament, and implications for lithospheric tectonics and mineral deposits Available to Purchase

Sharad Master
Published: 01 December 2006
South African Journal of Geology (2006) 109 (4): 503–514.
DOI: https://doi.org/10.2113/gssajg.109.4.503
... that within the Chesterfield Inlet, two high-grade metamorphic complexes have been mapped: the Uvauk complex ( Tella et al. , 1993 ), and the Kramanituar complex near Baker Lake ( Sanborn-Barrie, 1993 ). Detailed structural work indicates that the rocks in the Kramanituar complex, which are highly...
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View PDF for article title, Pangaean megalineaments: geophysical indications for the existence of Laurentian counterparts of the 6000 km Trans-Saharan Tibesti Lineament, and implications for lithospheric tectonics and mineral deposits
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Journal Article

Age constraints on the Paleoproterozoic tectonometamorphic history of the Committee Bay region, western Churchill Province, Canada: evidence from zircon and in situ monazite SHRIMP geochronology Available to Purchase

Chris J. Carson, Robert G. Berman, Richard A. Stern, Mary Sanborn-Barrie, Tom Skulski, Hamish A.I. Sandeman
Published: 15 September 2004
Canadian Journal of Earth Sciences (2004) 41 (9): 1049–1076.
DOI: https://doi.org/10.1139/e04-054
... investigation of the Uvauk complex, Churchill Province, Nunavut, Canada . Unpublished M. Sc. thesis , Carleton University , Ottawa, Ont. Montel J.-M. Kornprobst J. Vielzeuf D. 2000 . Preservation of old U–Th–Pb ages in shielded monazite: example from the Beni Bousera Hercynian kinzigites...
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View PDF for article title, Age constraints on the Paleoproterozoic tectonometamorphic history of the Committee Bay region, western Churchill Province, Canada: evidence from zircon and in situ monazite SHRIMP geochronology
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