Paleoproterozoic (1.90?1.86 Ga) arc volcanism in the Flin Flon Belt, Trans-Hudson Orogen, Canada

Stern, Richard A.; Syme, E C; Bailes, A H; Lucas, Stephen Bernard

doi:10.1007/bf00307276

Cited by 111 publications

(66 citation statements)

References 42 publications

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“…Its very positive ε Nd (T) values plus its depleted trace-element characteristics dictate that the Archean crustal component must be a very minor contaminant. Similarly surprising evidence for the involvement of older crust in the juvenile Early Proterozoic Flin Flon arc of the Trans Hudson orogen has been used to infer the presence of Archean crustal fragments during arc development from the primitive to mature stage (Stern et al, 1995).…”

Section: Isotopic Resultsmentioning

confidence: 99%

Provenance of tectonic history of the Gander Zone in the Caledonian/Appalachian Orogen: Implications for the origin and assembly of Avalon

Staal¹,

Sullivan²,

Whalen³

1996

Special Paper 304: Avalonian and Related Peri-Gondwanan Terranes of the Circum-North Atlantic

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New U-Pb zircon, Nd-Sm, and Sr isotopic data from Gander Zone basement fragments in northern New Brunswick, combined with a review of existing data, support a basement-cover relationship between the Avalonian Bras d'Or-Brookville belt and lower Paleozoic clastic rocks of the Gander Zone. Basement fragments occur as (1) large foliated and unfoliated granodiorite cobbles in a late Arenig to Llanvirn conglomerate of the Vallée Lourdes Formation of the Tetagouche Group and (2) as an allochthonous gabbro sheet (Upsalquitch gabbro), tectonically emplaced on top of the Tetagouche Group during Late Ordovician or Early Silurian thrusting.The granodiorite cobbles of the Vallée Lourdes Formation yielded late Mesoproterozoic (ca. 1.09 Ga) U-Pb zircon crystallization ages and gave an ε Nd (T) of -3.47 and a depleted mantle model age (T DM ) of 2.0 Ga. Xenocrystic zircon grains in the cobbles range in age between ca. 1.16 and 1.55 Ga. Geochemical data from a foliated granodiorite cobble suggest that the magma from which it crystallized formed by mixing of mantle-derived and older (>1.5 Ga) crustal-derived components.The Upsalquitch gabbro has a U-Pb zircon crystallization age of 543 +1/-2 Ma (earliest Cambrian) and is inferred to represent a fragment of the Gander Zone basement. Similar age igneous rocks occur in the Avalonian Bras d'Or-Brookville belt. The Upsalquitch gabbro forms the immediate base to one of the Middle Ordovician basalt suites of the Fournier Group (ca. 464 Ma), which indicates the presence of a significant hiatus. The Fournier Group was deposited in a back-arc basin that formed by splitting a late Arenig magmatic arc built on the Gander Zone. During rifting of the arc the gabbroic basement fragment was tectonically exhumed onto the sea floor by low-angle normal faulting immediately before eruption of the basalts. The gabbro's geochemistry indicates that it was mainly derived from a depleted mantle source. Xenocrystic zircons (ca. 2.6 Ga) in the Upsalquitch gabbro suggest the involvement of old Archean crust, although the presence of the latter is not reflected in the Nd-and Sr-isotopic data.The ages presented in this chapter complement detrital and xenocrystic zircon studies carried out by others in the Gander Zone of New Brunswick and Newfoundland and together indicate that basement to the Gander Zone is mainly made up of Early Cambrian (0.54-0.55 Ga), Neoproterozoic (0.6-0.8 Ga), Mesoproterozoic (1.0-1.55 Ga), and Archean rocks (2.5-2.7 Ga). This range of ages, combined with the isotopic and geochemical data, eliminates Laurentia as a possible basement to the

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Section: Isotopic Resultsmentioning

confidence: 99%

Provenance of tectonic history of the Gander Zone in the Caledonian/Appalachian Orogen: Implications for the origin and assembly of Avalon

Staal¹,

Sullivan²,

Whalen³

1996

Special Paper 304: Avalonian and Related Peri-Gondwanan Terranes of the Circum-North Atlantic

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“…There is some evidence to suggest that the high-K Papayato Volcanics rocks were produced late in the evolution of the arc (Elburg et al, 2003), a feature that has been commonly observed in both modern and ancient oceanic arcs (e.g. Morrison, 1980;Gill and Whelan, 1989;Müller et al, 1992;Stern et al, 1995). The low concentrations of LILE, LREE and HFSE shown by the high-K rocks are typical of high-K volcanic rocks formed in a late oceanic-arc setting (Müller et al, 1992).…”

Section: Geochemical Affinities Of the Volcanic And Sedimentary Suitesmentioning

confidence: 92%

“…In modern island arcs tholeiitic rocks are dominant in arcs related to the rapid subduction of old lithosphere beneath thin oceanic crust, and are commonly associated with back-arc basin formation, whereas relatively high proportions of intermediate calc-alkaline rocks are characteristic of more mature island arcs underlain by thicker crust (e.g. Gill, 1981;Stern et al, 1995). There is some evidence to suggest that the high-K Papayato Volcanics rocks were produced late in the evolution of the arc (Elburg et al, 2003), a feature that has been commonly observed in both modern and ancient oceanic arcs (e.g.…”

Section: Geochemical Affinities Of the Volcanic And Sedimentary Suitesmentioning

confidence: 99%

Stratigraphy and tectonic setting of the Cretaceous and Paleogene volcanic-sedimentary successions in northwest Sulawesi, Indonesia: implications for the Cenozoic evolution of Western and Northern Sulawesi

Leeuwen¹,

Muhardjo²

2005

Journal of Asian Earth Sciences

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“…Recent geochemical and tectono-stratigraphic studies in the neighbouring Flin Flon Domain (Stern et al 1995a(Stern et al , 1995bLucas et al 1996) have provided new important constraints for the geological history of that area. Important observations include recognition of the domain as a collage of chemically, lithologically, and structurally distinct "tectonostratigraphic assemblages" (Lucas et al 1996 and references therein), and characterization of the tectono-stratigraphic elements as ocean floor and ocean island, as well as juvenile volcanic arc, assemblages (Stern et al 1995a;.…”

Section: Supracrustal Rocksmentioning

confidence: 98%

Lithogeochemistry of volcano-plutonic assemblages of the southern Hanson Lake Block and southeastern Glennie Domain, Trans-Hudson Orogen: evidence for a single island arc complex

Maxeiner¹,

Sibbald²,

Slimmon³

et al. 1999

Can. J. Earth Sci.

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This paper describes the geology, geochemistry, and age of two amphibolite facies volcano-plutonic assemblages in the southern Hanson Lake Block and southeastern Glennie Domain of the Paleoproterozoic TransHudson Orogen of east-central Saskatchewan. The Hanson Lake assemblage comprises a mixed suite of subaqueous to subaerial dacitic to rhyolitic (ca. 1875 Ma) and intercalated minor mafic volcanic rocks, overlain by greywackes. Similarly with modern oceanic island arcs, the Hanson Lake assemblage shows evolution from primitive arc tholeiites to evolved calc-alkaline arc rocks. It is intruded by younger subvolcanic alkaline porphyries (ca. 1861 Ma), synvolcanic granitic plutons (ca. 1873 Ma), and the younger Hanson Lake Pluton (ca. 1844 Ma). Rocks of the Northern Lights assemblage are stratigraphically equivalent to the lower portion of the Hanson Lake assemblage and comprise tholeiitic arc pillowed mafic flows and felsic to intermediate volcaniclastic rocks and greywackes, which can be traced as far west as Wapawekka Lake in the south-central part of the Glennie Domain. The Hanson Lake volcanic belt, comprising the Northern Lights and Hanson Lake assemblages, shows strong lithological, geochemical, and geochronological similarities to lithotectonic assemblages of the Flin Flon Domain (Amisk Collage), suggesting that all of these areas may have been part of a more or less continuous island arc complex, extending from Snow Lake to Flin Flon, across the Sturgeon-Weir shear zone into the Hanson Lake Block and across the Tabbernor fault zone into the Glennie Domain.

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Paleoproterozoic (1.90?1.86 Ga) arc volcanism in the Flin Flon Belt, Trans-Hudson Orogen, Canada

Cited by 111 publications

References 42 publications

Provenance of tectonic history of the Gander Zone in the Caledonian/Appalachian Orogen: Implications for the origin and assembly of Avalon

Provenance of tectonic history of the Gander Zone in the Caledonian/Appalachian Orogen: Implications for the origin and assembly of Avalon

Stratigraphy and tectonic setting of the Cretaceous and Paleogene volcanic-sedimentary successions in northwest Sulawesi, Indonesia: implications for the Cenozoic evolution of Western and Northern Sulawesi

Lithogeochemistry of volcano-plutonic assemblages of the southern Hanson Lake Block and southeastern Glennie Domain, Trans-Hudson Orogen: evidence for a single island arc complex

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