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Balmer Assemblage

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Field and petrographic photographs of Balmer assemblage mafic volcanic rocks at the Laird Lake property. (A) Irregular contact between the ultramafic flow breccia and feeder sill or possible massive flow (UTM 419963E 5643961N; station 15BG176). (B) Pillowed rock with biotite-rich cores, amphibole-rich selvages, and quartz-rich amygdules on the outermost edge of the pillow (UTM 419168E 5644021N; station 15BG147). (C) Oxide facies banded-iron formation showing alternating layers of chert and magnetite (UTM 421126E 5643821N). (D) Mafic flow with feldspar phenocrysts showing trachytic alignment (UTM 422205E 5643577N; station 16BG538). (E) Lapilli tuff hosting feldspar porphyritic-rich clasts within quartz–feldspar crystal matrix (UTM 422803E 5643800N; station 16BG452). (F) Highly deformed mafic volcanic rock hosting interlayered bands that are biotite-, amphibole-, and clinozoisite-rich, with diopside porphyroclasts (UTM 421130E 564828N; gold-bearing Zone trench).

Field and petrographic photographs of Balmer assemblage mafic volcanic rock... Available to Purchase

Published: 23 May 2024
Fig. 3. Field and petrographic photographs of Balmer assemblage mafic volcanic rocks at the Laird Lake property. (A) Irregular contact between the ultramafic flow breccia and feeder sill or possible massive flow (UTM 419963E 5643961N; station 15BG176). (B) Pillowed rock with biotite-rich cores
Journal Article

Geochemistry, geochronology, and radiogenic isotopes of the Balmer and Confederation assemblages of the Laird Lake Area, Red Lake greenstone belt, Canada: implications for Archean tectonic evolution Available to Purchase

Brigitte R. Gélinas, Pete Hollings, Richard Friedman
Published: 23 May 2024
Canadian Journal of Earth Sciences (2024) 61 (6): 686–711.
DOI: https://doi.org/10.1139/cjes-2023-0122
...Fig. 3. Field and petrographic photographs of Balmer assemblage mafic volcanic rocks at the Laird Lake property. (A) Irregular contact between the ultramafic flow breccia and feeder sill or possible massive flow (UTM 419963E 5643961N; station 15BG176). (B) Pillowed rock with biotite-rich cores...
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View PDF for article title, Geochemistry, geochronology, and radiogenic isotopes of the <span class="search-highlight">Balmer</span> and Confederation <span class="search-highlight">assemblages</span> of the Laird Lake Area, Red Lake greenstone belt, Canada: implications for Archean tectonic evolution
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Journal Article

Imaging the upper part of the Red Lake greenstone belt, northwestern Ontario, with 3-D traveltime tomography, Available to Purchase

Fafu Zeng, Andrew J. Calvert
Published: 21 July 2006
Canadian Journal of Earth Sciences (2006) 43 (7): 849–863.
DOI: https://doi.org/10.1139/e06-027
... tomographic inversion of first arrival traveltimes recorded in this survey delineate the subsurface to depths as great as 1.5 km around this crooked two-dimensional seismic line. Within the Red Lake greenstone belt, P-wave velocities of 6.2–7.0 km s −1 occur at 500 m depth in the Mesoarchean Balmer assemblage...
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View PDF for article title, Imaging the upper part of the Red Lake greenstone belt, northwestern Ontario, with 3-D traveltime tomography,
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Journal Article

Timing of Gold Mineralization at Red Lake, Northwestern Ontario, Canada: New Constraints from U-Pb Geochronology at the Goldcorp High-Grade Zone, Red Lake Mine, and the Madsen Mine Available to Purchase

B. Dubé, K. Williamson, V. Mcnicoll, M. Malo, T. Skulski, T. Twomey, M. Sanborn-Barrie
Journal: Economic Geology
Published: 01 December 2004
Economic Geology (2004) 99 (8): 1611–1641.
DOI: https://doi.org/10.2113/gsecongeo.99.8.1611
... for gold exploration in Red Lake occur in the Balmer assemblage rocks within 500 m to 1 km of the unconformity. † Corresponding author: e-mail, [email protected] 02 09 2004 13 01 2004 Economic Geology 2004 T he world-class Campbell-Red Lake deposit ( Fig. 1 ) is actively...
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View PDF for article title, Timing of Gold Mineralization at Red Lake, Northwestern Ontario, Canada: New Constraints from U-Pb Geochronology at the Goldcorp High-Grade Zone, Red Lake Mine, and the Madsen Mine
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Journal Article

Gold prospectivity maps of the Red Lake greenstone belt: application of GIS technology, Available to Purchase

J.R. Harris, M. Sanborn-Barrie, D.A. Panagapko, T. Skulski, J.R Parker
Published: 04 September 2006
Canadian Journal of Earth Sciences (2006) 43 (7): 865–893.
DOI: https://doi.org/10.1139/e06-020
... characterized by pervasive and vein-style ferroan carbonate and elevated Au, As, Sb, and S anomalies; (4) proximity to the Mackenzie Island stock and diorite phases of the Dome stock; and, (5) tholeiitic basaltic flows and associated gabbroic rocks of the Balmer assemblage. Gold prospectivity maps produced...
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View PDF for article title, Gold prospectivity maps of the Red Lake greenstone belt: application of GIS technology,
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ɛNd values as a function of crystallization ages showing Nd isotope data for the Balmer assemblage mafic volcanic rocks of the Laird Lake property. (a) Tomlinson et al. 1998 and (b) Sanborn-Barrie et al. 2001. DM: depleted mantle, CHUR: chondritic uniform reservoir, B-MVHT: Balmer mafic volcanic (high-Ti), B-MVLT: Balmer mafic volcanic (low-Ti).

ɛ Nd values as a function of crystallization ages showing Nd isotope data... Available to Purchase

Published: 23 May 2024
Fig. 10. ɛ Nd values as a function of crystallization ages showing Nd isotope data for the Balmer assemblage mafic volcanic rocks of the Laird Lake property. ( a ) Tomlinson et al. 1998 and ( b ) Sanborn-Barrie et al. 2001 . DM: depleted mantle, CHUR: chondritic uniform reservoir, B-MVHT
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Primitive mantle-normalized diagrams for (A) Balmer ultramafic volcanic and intrusive rocks, (B) Balmer high-Ti mafic volcanic rocks, (C) Balmer low-Ti mafic volcanic rocks, (D) Confederation mafic volcanic rocks, (E) Confederation intermediate to felsic volcanic rock and syn-volcanic dioritic intrusion, and (F) Confederation quartz–feldspar crystal tuff. Normalizing values from Sun and McDonough (1989). Balmer diagrams include Red Lake geochemical compilation from Lemkow et al. (2006) for the western Uchi domain. The shaded fields represent the compilation of ultramafic and mafic volcanic rocks for the Balmer assemblage of the Red Lake greenstone belt. To create these fields, all samples that showed anomalous trends were excluded if they were described as altered or if no description was available.

Primitive mantle-normalized diagrams for (A) Balmer ultramafic volcanic and... Available to Purchase

Published: 23 May 2024
volcanic rocks for the Balmer assemblage of the Red Lake greenstone belt. To create these fields, all samples that showed anomalous trends were excluded if they were described as altered or if no description was available.
Image
Horizontal slices through the final 3-D velocity model at depths of (a) 100 m, (b) 300 m, (c) 500 m, and (d) 700 m. The contacts between the main geological units and the locations of major fault zones are shown. BA, Balmer assemblage; CA, Confederation assemblage; MS, metasedimentary rocks; GI, granitic intrusion; PLFZ, Pakwash Lake fault zone; SLFZ, Sydney Lake fault zone.

Horizontal slices through the final 3-D velocity model at depths of ( a ) 1... Available to Purchase

Published: 21 July 2006
Fig. 5. Horizontal slices through the final 3-D velocity model at depths of ( a ) 100 m, ( b ) 300 m, ( c ) 500 m, and ( d ) 700 m. The contacts between the main geological units and the locations of major fault zones are shown. BA, Balmer assemblage; CA, Confederation assemblage; MS
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Semblance values corresponding to trial values of dip and strike (3-D orientation) used in a search over traveltime trajectories in the prestack data (Bellefleur et al. 1997) for the reflection that projects to the surface within the southern part of the Balmer assemblage. CDP gathers from stations 3780 to 3820 were employed in this analysis, and a constant subsurface velocity of 6250 m s−1, also estimated from the data, was used. The maximum semblance values correspond to a dip of 21° and a strike of 129°.

Semblance values corresponding to trial values of dip and strike (3-D orien... Available to Purchase

Published: 21 July 2006
Fig. 8. Semblance values corresponding to trial values of dip and strike (3-D orientation) used in a search over traveltime trajectories in the prestack data ( Bellefleur et al. 1997 ) for the reflection that projects to the surface within the southern part of the Balmer assemblage. CDP gathers
Image
Interpretation of migrated seismic reflection section overlaid on a vertical section extracted from the 3-D velocity model along the line of common-depth point (CDP) bins. Blue lines indicate extensional shear zones that penetrate to the mid crust. Yellow lines indicate faults associated with the Sydney Lake fault zone. Green lines indicate hypothesized shear zones associated with the Balmer assemblage. Black lines indicate the orientation of reflection fabrics within the crust. Lines are shown dashed where less certain. Interpretation is modified from Calvert et al. (2004). VE, vertical exaggeration.

Interpretation of migrated seismic reflection section overlaid on a vertica... Available to Purchase

Published: 21 July 2006
with the Sydney Lake fault zone. Green lines indicate hypothesized shear zones associated with the Balmer assemblage. Black lines indicate the orientation of reflection fabrics within the crust. Lines are shown dashed where less certain. Interpretation is modified from Calvert et al. ( 2004 ). VE, vertical
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F ig . 4. A. Steeply dipping cockade carbonate ± quartz breccia vein with c... Available to Purchase

Published: 01 December 2004
selvages, section view (HWX zone, stope 34-806-8). E. Example of spectacular high-grade mineralization, showing semimassive gold veins at high angle to the contact between basalts of the Balmer assemblage and komatiitic basalt or filling fractures subparallel to the contact. Sample weight is 37 kg
Journal Article

The Geological Setting and Estimation of Gold Grade of the High-grade Zone, Red Lake Mine, Goldcorp Inc. Available to Purchase

TIM TWOMEY, STEPHEN McGIBBON
Published: 01 January 2001
Exploration and Mining Geology (2001) 10 (1-2): 19–34.
DOI: https://doi.org/10.2113/10.1-2.19
... been mined from this district. Approximately 20 million ounces of gold have been mined to the end of 2001 ( http://www.mndm.gov.on.ca/MNDM/MINES/resgeol/redlkprode.htm ), primarily from rocks within the upper stratigraphy of the Balmer assemblage. Gold was first mined in the camp in 1930...
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View PDF for article title, The Geological Setting and Estimation of Gold Grade of the High-grade Zone, Red Lake Mine, Goldcorp Inc.
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Representative whole-rock geochemical data for the Balmer and Confederation... Available to Purchase

Published: 23 May 2024
Table 1. Representative whole-rock geochemical data for the Balmer and Confederation assemblages in the Laird Lake area.
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Tectono-stratigraphic columns illustrating possible regional correlations among Mesoarchean and Neoarchean units and events in the Lake Winnipeg – Red Lake area. Lake Winnipeg: LS, Lewis–Storey; Bi, Black Island; Hr, Hole River; Rice Lake belt: Bd, Bidou; Ge, Gem; Wallace lake belt: Cl, Conley; OB, Overload Bay; BI, Big Island; Garner Lake: GLI, Garner Lake intrusion; Red Lake belt: Bm, Balmer; Ba, Ball; SB, Slate Bay; BC, Bruce Channel; TB, Trout Bay; Cf, Confederation assemblage.

Tectono-stratigraphic columns illustrating possible regional correlations a... Available to Purchase

Published: 31 August 2005
, Conley; OB, Overload Bay; BI, Big Island; Garner Lake: GLI, Garner Lake intrusion; Red Lake belt: Bm, Balmer; Ba, Ball; SB, Slate Bay; BC, Bruce Channel; TB, Trout Bay; Cf, Confederation assemblage.
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Tectono-stratigraphic columns illustrating possible regional correlations among Mesoarchean and Neoarchean units and events in the Uchi subprovince (modified after Stott and Corfu 1991; Beakhouse et al. 1999; Rogers 2002; Bailes et al. 2003; Hollings and Kerrich 2004; Sanborn-Barrie et al. 2004). Assemblage abbreviations for greenstone belts for, Lake Winnipeg – Rice Lake: LS, Lewis–Storey; Bd, Bidou; Bl, Black Island; Ed, Edmunds Lake; Gm, Gem; Ho, Hole River; Sa, San Antonio. Assemblage abbreviations for Wallace Lake: Cl, Conley; OB, Overload Bay; Bg, Big Island; Sd, Siderock. Assemblage abbreviations for Garner – Bee Lake: Gn, Garner Lake intrusion; Al, Anderson; Kl, Kangaroo; Assemblage abbreviations for Red Lake: Bm, Balmer; Bl, Ball; Sl, Slate Bay; BC, Bruce Channel; TB, Trout Bay; Cf, Confederation; Gr, Graves; Assemblage abbreviations for Birch–Uchi: Wo, Woman; Sf, Sundown; Sp: Springpole; Assemblage abbreviations for Meen–Dempster: Kg, Kaminiskag; Mn, Meen; Assemblage abbreviations for Pickle Lake: PC, Pickle Crow; Assemblage abbreviations for Lake St. Joseph: SJ, St. Joseph; Ei, Eagle Island.

Tectono-stratigraphic columns illustrating possible regional correlations a... Available to Purchase

Published: 04 September 2006
, Siderock. Assemblage abbreviations for Garner – Bee Lake: Gn, Garner Lake intrusion; Al, Anderson; Kl, Kangaroo; Assemblage abbreviations for Red Lake: Bm, Balmer; Bl, Ball; Sl, Slate Bay; BC, Bruce Channel; TB, Trout Bay; Cf, Confederation; Gr, Graves; Assemblage abbreviations for Birch–Uchi: Wo, Woman
Journal Article

Gold Mineralization, Hydrothermal Alteration, and Li Isotope Fractionation at Cochenour Orogenic Gold Deposit, Red Lake, Canada Available to Purchase

Olivier Nadeau, Alex J. Gatenby, Yilin Xiao
Published: 18 June 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (3): 429–455.
DOI: https://doi.org/10.3749/2300053
...-pyrite-gold and biotite-tourmaline veinlets ( Blais et al. 2015 ). The Cochenour mine complex is separated from the Red Lake-Campbell complex by the East Bay Footwall fault and is mainly hosted by the folded, faulted, and intensely altered basalts of the Balmer assemblage, near the Golden Eagle shear...
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View PDF for article title, Gold Mineralization, Hydrothermal Alteration, and Li Isotope Fractionation at Cochenour Orogenic Gold Deposit, Red Lake, Canada
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Microfossil and strontium isotope chronology used to identify the controls of Miocene reefs and related facies in NW Cyprus Available to Purchase

Torin Cannings, Elizabeth M. Balmer, Giovanni Coletti, Ryan B. Ickert, Dick Kroon, Isabella Raffi, Alastair H. F. Robertson
Published: 15 January 2021
Journal of the Geological Society (2021) 178 (2): jgs2020-081.
DOI: https://doi.org/10.1144/jgs2020-081
...Torin Cannings; Elizabeth M. Balmer; Giovanni Coletti; Ryan B. Ickert; Dick Kroon; Isabella Raffi; Alastair H. F. Robertson Abstract The existing chronostratigraphic framework in NW Cyprus of two-phase, Early and Late Miocene reef and associated facies development is tested and improved using...
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View PDF for article title, Microfossil and strontium isotope chronology used to identify the controls of Miocene reefs and related facies in NW Cyprus
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F ig . 15. Schematic representation of the timing and nature of the geologi... Available to Purchase

Published: 01 December 2004
-Py = late gold, quartz, pyrite mineralization; Bal = Ball 2940 ± 2 and 2925 ± 3 Ma felsic volcanics (zircon ages, Corfu and Wallace, 1986 ); BalmFP = 2989 ± 3 Balmer rhyolite (zircon age, Corfu and Wallace, 1987 ); BalmR = 2964+5 –1 Ma Balmer rhyolite (zircon age, Corfu and Wallace, 1987 ); BC
Journal Article

New high-precision U–Pb ages for the Island Lake greenstone belt, northwestern Superior Province: implications for regional stratigraphy and the extent of the North Caribou terrane, Available to Purchase

Jen Parks, Shoufa Lin, Don Davis, Tim Corkery
Published: 01 September 2006
Canadian Journal of Earth Sciences (2006) 43 (7): 789–803.
DOI: https://doi.org/10.1139/e06-044
... the McInnes Lake belt gave ages ranging from 2974 to 2928 Ma ( Corfu et al. 1998 ), a range similar to that of the Balmer and Ball assemblages at Red Lake. A felsic tuff from the Favourable Lake belt gave an age of Ma ( Corfu and Ayers 1991 ), an almost identical age to the Jubilee and Trout Bay...
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View PDF for article title, New high-precision U–Pb ages for the Island Lake greenstone belt, northwestern Superior Province: implications for regional stratigraphy and the extent of the North Caribou terrane,
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Journal Article

The Western Superior Province Lithoprobe and NATMAP transects: introduction and summary Available to Purchase

John A. Percival, Herwart Helmstaedt
Published: 29 August 2006
Canadian Journal of Earth Sciences (2006) 43 (7): 743–747.
DOI: https://doi.org/10.1139/e06-063
... of the Balmer assemblage have high velocities readily distinguished from Confederation assemblage and metasedimentary units. Fault and alteration zones are mapped on the basis of still lower velocities. The Red Lake greenstone belt hosts some of Canada’s richest gold deposits, and analyzing the controls...
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