The Yukon Crystalline Terrane: Enigma in the Canadian Cordillera

Tempelman-Kluit, D J

doi:10.1130/0016-7606(1976)87<1343:tyctei>2.0.co;2

Cited by 60 publications

(38 citation statements)

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“…( -Kluit andWanless 1975, 1980;Godwin 1975). Minerals from these sample sites are probably reset by that plutonism (Hart 1964).…”

Section: Metamorphic Rocksmentioning

confidence: 95%

“…(1 980) Albanese (1980) Shenvood and Craddock (1979) Albanese (1980) Albanese (1 980) Albanese (1 980) Albanese (1980) Albanese ( not included here. Le Couteur and Tempelman- Kluit (1976) suggested that this isochron indicates a hybrid age and thus does not reflect the date of a real event.…”

Section: Igneous Rocksmentioning

confidence: 96%

“…The Yukon Crystalline Terrane (Tempelman-Kluit 1976), the Alaskan part of which is commonly referred to as the Yukon-Tanana Upland (also called the Yukon-Tanana terrane, Coney et al 1980), is a metamorphic and plutonic terrane characterized by greenschist-and amphibolite-facies metamorphic rocks intruded by plutons of various ages (Fig. I).…”

Section: Introductionmentioning

confidence: 99%

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Review of radiometric data from the Yukon Crystalline Terrane, Alaska and Yukon Territory

Wilson¹,

Smith²,

Shew³

1985

Can. J. Earth Sci.

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The results of more than 20 years of geochronological studies in the Yukon Crystalline Terrane in east-central Alaska and the western Yukon Territory suggest at least six igneous and thermal (metamorphic?) events. Plutonism during Mississippian, Early Jurassic, mid-Cretaceous, Late Cretaceous, and early Tertiary times is indicated. Evidence also indicates that Mississippian, Early Jurassic, late Early Cretaceous, and late Cretaceous thermal (metamorphic?) events have affected parts of the terrane. The western part of the terrane was affected by a significant regional metamorphic event in late Early Cretaceous time, followed by a terrane-wide mid-Cretaceous plutonic event. The pattern of K-Ar ages allows division of the terrane into domains, bounded by northeast-trending lineaments.L'examen des rksultats de plus de 20 annkes d'ktudes gkochronologiques de la plate-forme cristalline du Yukon rkvkle au moins la prCsence de six kvknements ignks et thermiques (mktamorphiques?). Le plutonisme fut actif durant le Mississippien, le Jurassique infkrieur, le Crktack moyen, le Crktack supkrieur et le Tertiaire infkrieur. On observe que des manifestations thermiques (mktamorphiques?) ont affectk des parties de la plate-forme cristalline du Yukon durant le Mississippien, le Jurassique infkrieur, le CrktacC tardi-infkrieur et le Crktace supkrieur. Durant le Crktack tardi-infkrieur est survenu un important kvknement de mktamorphisme regional qui a affectk la partie occidentale de la plate-forme cristalline, lequel fut suivi au CrktacC moyen par un kvknement plutonique englobant toute la largeur de la plate-forme cristalline. Le motif d'ktalement des Lges K-Ar permet de diviser la plate-forme cristalline en domaines, lesquels sont limitks par des lineaments de direction nord-est.[Traduit par le journal]Can.

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“…( -Kluit andWanless 1975, 1980;Godwin 1975). Minerals from these sample sites are probably reset by that plutonism (Hart 1964).…”

Section: Metamorphic Rocksmentioning

confidence: 95%

Section: Igneous Rocksmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Review of radiometric data from the Yukon Crystalline Terrane, Alaska and Yukon Territory

Wilson¹,

Smith²,

Shew³

1985

Can. J. Earth Sci.

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“…Rocks are well foliated and multiply deformed; at least some protoliths are of Paleozoic age (Foster and others, 1985). This unit is intruded by latest Triassic to earliest Jurassic granitoids, similar to those in the Stikinia terrane of Yukon Territory, Canada (Tempelman-Kluit, 1976). Unit 37 is in thrust contact with adjacent rocks.…”

Section: Late Triassic To Early Jurassic Metamorphismmentioning

confidence: 98%

Metamorphic history of Alaska

Dusel-Bacon¹

1991

Open-File Report

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“…Northeast of the Shakwak-Dalton segment, the Yukon Crystalline terrane, also referred to as the Yukon-Tanana terrane, merges to the southeast with the Coast Plutonic Complex (Figs. 1, 3) (Tempelman-Kluit, 1976;Mortensen and Jilson, 1985). In the southern part of the study area, the Gravina-Nutzotin belt abuts the Shakwak-Dalton segment (Figs.…”

Section: Introductionmentioning

confidence: 99%

Petrology of Mid-Cenozoic strike-slip basins in an accretionary orogeny St. Elias Mountains, Yukon Territory, Canada

Ridgway¹,

DeCelles²

1993

Processes Controlling the Composition of Clastic Sediments

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Eocene-Oligocene strike-slip faulting along the Denali fault system in Yukon Territory produced several local strike-slip basins that were filled by coarse-grained alluvial, fluvial, and lacustrine sediment referred to as the Amphitheatre Formation. The Amphitheatre Formation provides an excellent opportunity to study in detail the composition of siliciclastic sediment in a major, accretionary strike-slip orogen.Petrographic analyses of sandstones and clast counts of conglomerates reveal a lithologically diverse provenance. On standard QFL and QmFLt diagrams, sandstones from the Burwash and Bates Lake basins are arkosic, overlapping the uplifted basement and dissected magmatic arc provenance fields of Dickinson and Suczek (1979). Conglomerates were derived from volcanic, plutonic, and medium-to low-grade metasedimentary rocks that currently are found in several accreted terranes associated with the Denali fault system. Wrangellia and the Alexander terrane provided voluminous volcanic, metavolcanic (greenstone), sedimentary, and low-grade metasedimentary material. The Yukon Crystalline terrane provided medium-grade (gneissic and schistose) material and plutonic material, and the Gravina-Nutzotin belt provided pelitic and metasedimentary material. These data support the contention that the Amphitheatre Formation was derived mainly from local, high-relief sources associated with major uplift in the eastern St. Elias Mountains, as well as the southern Yukon Crystalline terrane.The Eocene-Oligocene climatic event apparently had no significant effect on Amphitheatre sandstone composition. This is attributed to the proximal character of the sandstones studied; steep local relief kept soil residence times to a minimum in spite of climatic change. In addition, the persistence of coal-and stream-dominated alluvial fan facies throughout the entire stratigraphic section indicates that climate remained humid in southwestern Yukon Territory, possibly owing to local orographic effects. It is proposed that, in general, climate should not have a major impact on detrital sand composition in large strike-slip orogens, where sediment accumulates within the orogen itself and is subject neither to long distances of transport nor to long-term residence in lowland soil profiles where most compositional modification is expected.

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The Yukon Crystalline Terrane: Enigma in the Canadian Cordillera

Cited by 60 publications

References 0 publications

Review of radiometric data from the Yukon Crystalline Terrane, Alaska and Yukon Territory

Review of radiometric data from the Yukon Crystalline Terrane, Alaska and Yukon Territory

Metamorphic history of Alaska

Petrology of Mid-Cenozoic strike-slip basins in an accretionary orogeny St. Elias Mountains, Yukon Territory, Canada

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