Evolution of the subaqueous to near-emergent Joutel volcanic complex, Northern Volcanic Zone, Abitibi Subprovince, Quebec, Canada

Legault, Marc; Gauthier, Michel; Jébrak, Michel; Davis, Don W.; Baillargeon, François

doi:10.1016/s0301-9268(02)00010-4

Cited by 19 publications

(21 citation statements)

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“…Abbreviations and acronyms used on the map are listed. David et al (2006); David et al (2007) Mortensen (1993a); David et al (2006) Héva Formation 2702 ± 1 Ma TH basalt and andesite Pilote et al (2000) Villebon Group 2703 ± 1 Ma TH-TR flows, Moorhead et al (2000b) 2710-2704 Ma Val-d'Or Formation 2705-2704 Ma TR-CA flows, pyroclastics Wong et al (1991); Pilote et al (2000); Moorhead et al (2000a); Scott et al (2002) Zhang et al (1993); Goutier (1997) Mortensen (1993b); Legault et al (2002) Joutel Formation Normétal Group 2728 ± 1 Ma TR-TH volcanics Mortensen (1993a); Lafrance (2003) Brouillan-Fénelon Group 2726 ± 3 Ma TR felsic flows Barrie and Krogh (1996) Mueller and Mortensen (2002); iron formation and gabbro Mortensen (1993a) 2750-2735 Ma Gemini-Turgeon rhyolite 2736 ± 1 Ma CA flows, pyroclastics Davis et al (2005) Pre intervals, stratigraphy, and geochemistry, utilizing previous syntheses of the southern Abitibi greenstone belt (e.g., Davis et al, 2000;Heather, 2001;Ayer et al, 2002a) and a new synthesis of the entire Abitibi greenstone belt (Ayer et al, 2005;Goutier and Melançon, 2007). We use the stratigraphic and/or lithotectonic succession to define major structures and provide a guide to identification and tracing of volcanic hiatuses and thus syngenetic mineralized environments.…”

Section: S T -L a U R E N T S T -L A U R E N T L A K E S U P E Ri O Rmentioning

confidence: 99%

“…2) are on the margins of large synvolcanic and syntectonic plutons. These include the Mine Hunter Group (English terminology = Hunter Mine Group) on the margin of the Poularies pluton, near the Ontario-Québec border (Mortensen, 1993b;Mueller and Mortensen, 2002), the Poirier Member of the Joutel Formation and Valrennes Complex on the margin of the Mistaouac pluton in the Joutel area (Mortensen, 1993b;Davis et al, 2000;Legault et al, 2002); the Brouillan-Fénelon Group on the flank of the Brouillan pluton in the area of the Selbaie mines (Barrie and Krogh, 1996), the Waconichi Formation and the Lac Doré Complex in the Chibougamau area (Mortensen, 1993b); the Chanceux Formation (Lac Hébert area, Bandyayera et al, 2004) and the Lac Watson Group and the Rivière Bell Complex in the Matagami area (Mortensen, 1993a).…”

Section: To 2724 Episode (Deloro Assemblage)mentioning

confidence: 99%

“…For example, iron formation breccia occurs in the Lac Sauvage iron formation capping the Waconichi Formation in the Chibougamau area (Henry and Allard, 1979). Typically, these units are overlain by volcanic rocks dated at 2722 to 2720 Ma such as the Eagle Member at Joutel (Legault et al, 2002). This leads us to suppose that there is a time gap of 2 to 6 m.y.…”

Section: To 2724 Episode (Deloro Assemblage)mentioning

confidence: 99%

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Depositional Gaps in Abitibi Greenstone Belt Stratigraphy: A Key to Exploration for Syngenetic Mineralization

et al. 2008

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Models of greenstone belt development are crucial for exploration. Allochthonous models predict belts to be a collage of unrelated fragments, whereas autochthonous models allow for prediction of syngenetic mineral deposits within specific stratigraphic intervals. Superior province greenstone belts consist of mainly volcanic units unconformably overlain by largely sedimentary "Timiskaming-style" assemblages, and field and geochronological data indicate that the Abitibi greenstone belt developed autochthonously. We describe major revisions to stratigraphy of the Abitibi greenstone belt and the implications of an autochthonous development of the volcanic stratigraphy for exploration for syngenetic mineralization. The Abitibi greenstone belt is subdivided into seven discrete volcanic stratigraphic episodes on the basis of groupings of numerous U-Pb zircon ages of pre

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Section: S T -L a U R E N T S T -L A U R E N T L A K E S U P E Ri O Rmentioning

confidence: 99%

Section: To 2724 Episode (Deloro Assemblage)mentioning

confidence: 99%

Section: To 2724 Episode (Deloro Assemblage)mentioning

confidence: 99%

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Depositional Gaps in Abitibi Greenstone Belt Stratigraphy: A Key to Exploration for Syngenetic Mineralization

et al. 2008

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“…Furthermore, stromatolites are not uncommon in near-shore volcanic settings (e.g. Lambert, 1998;Delgado et al, 2000;Kranendonk et al, 2002;Legault et al, 2002). Thus in many cases, it may be that paraamphibolites may only be confidently ascertained in small-scale occurrences with clear sedimentary associations such as the pelite-'limestone'-amphibolite lens in the Ross of Mull, Scotland (Rock and Macdonald, 1986).…”

Section: Discussionmentioning

confidence: 99%

Carbonate nodules of probable stromatolitic origin in amphibolite from the Neoproterozoic terrain of southern Israel

Bogoch¹,

Shirav²

2004

Mineral. mag.

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Several small bodies of massive to banded amphibolite occur within plagioclase-quartz-biotite hornblende gneiss at or close to its boundary with a quartz diorite pluton in the Neoproterozoic terrain of southern Israel. Entrapped within the amphibolite are nodules consisting mainly of calcite+talc, and rare banded marble. Remnant laminae and certain geochemical features such as the negative Ce anomaly and depleted d 13 C of the nodules sugggest that they initially formed as stromatolites. The local geological setting of the amphibolites together with the presence of the enclosed meta-carbonates favoured an origin as sediments, although some of the geochemical data point to a basaltic precursor and some of the carbonates have a puzzlingly high (>1000 ppm) Ni content. The origin of the amphibolites is thus enigmatic.

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“…Pilote and Guha (1998) and Daigneault (2006) Daigneault (1999) Legault et al (2002); Hutchinson (1993) Gauthier et al (2003) Acknowledgments This paper presents parts of a Ph.D. thesis by the first author. SOQUEM Inc. is sincerely thanked for scientific collaboration, logistical, and financial support as well as access to unpublished information.…”

Section: Associated Intrusionsmentioning

confidence: 99%

Geology, Alteration, and Origin of Archean Au-Ag-Cu Mineralization Associated with the Synvolcanic Chibougamau Pluton: The Brosman Prospect, Abitibi Greenstone Belt, Canada

Côté-Mantha¹,

Gaboury²,

Chartrand³

et al. 2012

Economic Geology

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The Au-Ag-Cu Brosman prospect is located in the Line Lake area on the northern limb of the Chibougamau anticline, in the northeast part of the Archean Abitibi greenstone belt. This prospect comprises a broad N-S, subvertical mineralized envelope formed in a synvolcanic fault-related environment. This envelope is at least 300 m long, up to 30 m wide, and is known to a depth of 950 m, where it remains open. It exhibits two contrasting mineralized zones that are representative of the varying styles of mineralization in the area. The Auriferous zone consists of both ubiquitous pyrite disseminations and Au-bearing silicate-sulfide veins in strongly fractured intrusive, effusive, and volcaniclastic rocks showing propylitic and chloritic alteration assemblages. The Polymetallic zone, on the other hand, is characterized by discrete, Cu-Ag-Au−rich magnetite-sulfide veins and lesser pyrite disseminations within distal propylitic and proximal potassic to sodic alteration zones. The Polymetallic zone is hosted by a chaotic assemblage of gabbro and tuff bodies interpreted as a talus megabreccia.Several lines of evidence, including the spatial distribution pattern and nature of the alteration and mineralization assemblages, metal associations, mass-balance calculations, pyrite composition, and crosscutting relationships are indicative of a preregional deformation, synvolcanic origin for the hydrothermal activity. Crosscutting relationships, alteration characteristics as well as whole-rock and LA-ICP-MS pyrite analyses reveal two stages of hydrothermal alteration and mineralization. Stage I consists of both ubiquitous disseminated pyrite, found in the Polymetallic and Auriferous zones, and contemporaneous magnetite-sulfide veins, restricted to the Polymetallic zone. Stage II is restricted to the Auriferous zone and corresponds to Au-bearing silicate-sulfide veins with characteristic vein-halo chloritic alteration overprinting Stage I alteration and mineralization.This hydrothermal activity is interpreted to have occurred concurrently with the development of the fertile, deeper magmatic-hydrothermal system related to the Chibougamau Pluton. Stage I hydrothermal activity, related to the early build-up of the volcanic sequence, formed a continuum of mineralization from discrete massive magnetite-sulfide veins to ubiquitous pyrite disseminations in a submarine talus megabreccia generated along synvolcanic faults. Afterward, a late Au-rich contribution to the hydrothermal fluids, possibly related to intermediate to felsic magmatism (the 2707.6 ± 1.4 Ma Line Lake stock), produced Stage II silicate-sulfide veins overprinting mineralization and alteration in favorably oriented and sustainably permeable fracture zones of the Auriferous zone.Overall, this study suggests that the Brosman prospect is a rare example of Archean polymetallic mineralization produced by a shallow subaqueous epithermal-style subsystem developed in a broader, fertile magmatichydrothermal arc setting.

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Evolution of the subaqueous to near-emergent Joutel volcanic complex, Northern Volcanic Zone, Abitibi Subprovince, Quebec, Canada

Cited by 19 publications

References 49 publications

Depositional Gaps in Abitibi Greenstone Belt Stratigraphy: A Key to Exploration for Syngenetic Mineralization

Depositional Gaps in Abitibi Greenstone Belt Stratigraphy: A Key to Exploration for Syngenetic Mineralization

Carbonate nodules of probable stromatolitic origin in amphibolite from the Neoproterozoic terrain of southern Israel

Geology, Alteration, and Origin of Archean Au-Ag-Cu Mineralization Associated with the Synvolcanic Chibougamau Pluton: The Brosman Prospect, Abitibi Greenstone Belt, Canada

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