Geology, Lake Ambrose and part of Buchans, Newfoundland and Labrador

Rogers, N; vanStaal, C R; McNicoll, V J; Squires, GC; Pollock, John; Zagorevski, A

doi:10.4095/221289

Cited by 6 publications

(10 citation statements)

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“…Crippleback Intrusive Suite εNd 513 Ma = -5.9 to -5.2 (Rogers et al 2006). Mafic volcanic 342 rocks are common in the Sandy Brook Group; however, no Nd isotopic data are 343 published thus no comparison can be made to data from this study.…”

Section: Results 260mentioning

confidence: 85%

Provenance of exhalites associated with the Lemarchant volcanogenic massive sulphide (VMS) deposit, central Newfoundland, Canada: insights from Nd isotopes and lithogeochemistry

Lode

Piercey

Cloutier

2017

JGS

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Neodymium isotope data on exhalites and tuffs from the Cambrian 15Lemarchant volcanogenic massive sulphide (VMS) deposit provide insights into the 16 tectonic environment of the Tally Pond group, Canada. New data from exhalites from the 17Lemarchant area show evolved values of εNd 513 = -6.0 to -1.8, whereas the associated 18 volcanic rocks have εNd 513 of +0.4 to +1.4. The Lemarchant exhalite εNd compositions 19 overlap the underlying Ganderian Neoproterozoic Sandy Brook Group (εNd t = -6.5 to 20 -1.9) and Crippleback Intrusive Suite (εNd t = -5.9 to -5.2). The evolved Nd isotopic 21 signatures suggest that the volcanic rocks of the Tally Pond group were formed upon 22Ganderian arc basement, which itself was possibly built upon, or proximal to, the 23

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Section: Results 260mentioning

confidence: 85%

Provenance of exhalites associated with the Lemarchant volcanogenic massive sulphide (VMS) deposit, central Newfoundland, Canada: insights from Nd isotopes and lithogeochemistry

Lode

Piercey

Cloutier

2017

JGS

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“…Both groups are characterized by coeval continental arc magmatism (e.g., Swinden et al 1997;Zagorevski et al 2006), and likely formed as along-strike segments of the same arc system ). Although superficially similar, stratigraphic, geochemical, and isotopic differences led to their separation (e.g., Rogers et al 2005). Structural and seismic reflection data show that the Red Indian Lake Group is thrust beneath the Buchans Group along the Tilley's Pond Fault (Thurlow et al 1992).…”

Section: Buchans and Red Indian Lake Groupsmentioning

confidence: 96%

“…The change from N-MORB to calc-alkaline mafic magmatism is broadly coincident with a polymictic volcanogenic conglomerate, which in part sources the underlying N-MORB volcanic rocks (Rogers 2004). On the north shore of Red Indian Lake, the island arc tholeiitic basalt of the ophiolitic Skidder Formation (Pickett 1987;Zagorevski et al 2006) is overlain by a polymictic volcanogenic conglomerate, itself overlain by calc-alkaline basalt and rhyolite (Rogers et al 2005;Zagorevski et al 2006;Zagorevski and Rogers 2011). Thus, the Red Indian Lake Group represents a progression from primitive arc volcanism at the base to more mature arc volcanism at the top (Rogers et al 2005;Zagorevski et al 2006).…”

Section: Red Indian Lake Groupmentioning

confidence: 96%

“…Polymictic volcanogenic conglomerate horizons occur throughout the Darriwilian (ca. 468-461 Ma: Gradstein et al 2004) stratigraphy in the Annieopsquotch Accretionary Tract (AAT; e.g., Stewart 1987;Thurlow and Swanson 1987;Bostock 1988;Rogers et al 2005;Zagorevski et al 2006). Although generally volcanic-dominated, these conglomerate horizons commonly contain plutonic, hypabyssal, and metamorphic clasts (e.g., Thurlow and Swanson 1987;Bostock 1988).…”

Section: Introductionmentioning

confidence: 96%

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Preservation of terranes during the assembly of the Annieopsquotch Accretionary Tract: Inferences from the provenance of a Middle Ordovician ophiolite to arc transition, central Newfoundland Appalachians¹Geological Survey of Canada Contribution 20100463.²This article is one of a series of papers published in this CJES Special Issue: In honour of Ward Neale on the theme of Appalachian and Grenvillian geology.

et al. 2012

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The Newfoundland Appalachians are a classic area for studying the record of arc development and terrane accretion processes with excellent exposure to different crustal levels that are minimally deformed and metamorphosed. This area also provides a link between the once continuous Appalachian and Caledonian orogens. The Annieopsquotch Accretionary Tract lies along the Red Indian Line, within the peri-Laurentian realm of the central Newfoundland Appalachians. The Darriwilian (468-461 Ma) tectonostratigraphic units of the Annieopsquotch Accretionary Tract are commonly characterized by polymictic volcanogenic conglomerate horizons. A conglomerate horizon at the interface between a suprasubduction zone ophiolite and its calc-alkaline volcanic arc cover sequence is herein investigated for zircon and geochemical provenance. Geochronology revealed a maximum age of deposition of 467 ± 4 Ma with zircon inheritance ranging from ca. 500 to 2800 Ma, consistent with a peri-Laurentian continental basement source. Four types of volcanogenic conglomerate clasts are noted on the basis of lithogeochemistry: arc andesite; calc-alkaline basalt; tholeiitic basalt; and non-arc rhyodacite. Tholeiitic basalt clasts are likely locally derived, perhaps from the underlying Skidder Formation. Other volcanic clasts do not have any known geochemical equivalents in the Annieopsquotch Accretionary Tract and hence appear to be exotic. The dominant zircon population suggests that the exotic clasts were derived from a ca. 467 Ma peri-Laurentian andesitic volcanic arc that once formed part of the Annieopsquotch Accretionary Tract.Résumé : Les Appalaches de Terre-Neuve sont un endroit classique pour étudier les données géologiques de développement d'arcs et les processus d'accrétion de terranes, elles présentent d'excellents affleurements des différents niveaux de la croûte où la déformation et le métamorphisme sont minimes. On y trouve aussi un lien entre les orogènes appalachien et calédo-nien, jadis continus. La bande de terre accrétionnaire d'Annieopsquotch est située le long de la ligne Red Indian, à l'inté-rieur du domaine péri-laurentien des Appalaches du centre de Terre-Neuve. Les unités tectonostratigraphiques du Darriwilien (468-461 Ma) de la bande de terre accrétionnaire d'Annieopsquotch sont généralement caractérisées par des horizons de conglomérat volcanogène polymictique. Un horizon de conglomérat, à l'interface entre une zone d'ophiolite de supra-subduction et sa séquence de couverture d'arc volcanique calco-alcalin, est étudié dans le présent article pour sa provenance géochimique et celle des zircons. La géochronologie révèle un âge maximum de déposition de 467 ± 4 Ma avec des zircons datant d'environ 500 à 2800 Ma, ce qui concorde avec une provenance du socle continental péri-laurentien. Quatre types de clastes de conglomérat volcanogène sont signalés selon la lithogéochimie : andésite d'arc, basalte calco-alcalin, basalte tholéiitique et rhyodacite ne provenant pas d'un arc. Les clastes de basalte tholéiitique proviennent probabl...

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“…466 Ma rifted arc or backarc basin-like volcanic rocks (Bostock 1988;, they are best interpreted to have been deposited in a forearc basin. A similar tectonic setting may be also be applicable to parts of the Red Indian Lake Group, in which volcaniclastic and epiclastic deposits are locally abundant above backarc-like basement along the Red Indian Line (Rogers et al 2005;Zagorevski et al 2006).…”

Section: Forearc Basin and Basementmentioning

confidence: 99%

From Large Zones to Small Terranes to Detailed Reconstruction of an Early to Middle Ordovician Arc–Backarc System Preserved Along the Iapetus Suture Zone: A Legacy of Hank Williams

Zagorevski

McNicoll

Staal

et al. 2015

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Geology, Lake Ambrose and part of Buchans, Newfoundland and Labrador

Cited by 6 publications

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Provenance of exhalites associated with the Lemarchant volcanogenic massive sulphide (VMS) deposit, central Newfoundland, Canada: insights from Nd isotopes and lithogeochemistry

Provenance of exhalites associated with the Lemarchant volcanogenic massive sulphide (VMS) deposit, central Newfoundland, Canada: insights from Nd isotopes and lithogeochemistry

From Large Zones to Small Terranes to Detailed Reconstruction of an Early to Middle Ordovician Arc–Backarc System Preserved Along the Iapetus Suture Zone: A Legacy of Hank Williams

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