USGS Professional Paper 1697 - Alaska Resources Library

344 Metallogenesis and Tectonics of the Russian Far East, Alaska, and the Canadian Cordillera
Table 2—Continued
Unit(s) and Correlations.
Age
Peninsular sequence of Wrangellia supterterrane
(Talkeetna Formation) in Alaska;
Bonanza Formation and Cadwallader island
arc and Methow turbidite-basin terranes in
Canadian Cordillera.
Late Triassic and Early Jurassic.
Chugach (older part, blueschist and McHugh
Complex), Bridge River, and Baker terranes.
Paleozoic, Triassic, and Early Jurassic.
Stikinia and Quesnellia terranes.
Permian to Early Jurassic.
Cache Creek, Slide Mountain, and Seventymile
terranes.
Paleozoic and Mesozoic.
Tectonic Environment(s) Tectonic Linkages.
Comments
Talkeetna-Bonanza Island Arc
Island arc Axial part of arc.
Accretionary wedge and
subduction zone
Stikinia-Quesnellia Island Arc
Island arc Axial part of arc.
Subduction zone and accretionary
wedge
Linked to Talkeetna and Bonanza arcs. Remnants of
subduction of Cache Creek and Farallon oceanic
plates.
Linked to Stikinia-Quesnellia arc. Remnants of
subduction of Cache Creek oceanic plate.
MAINLY LATE CRETACEOUS AND EARLY CENOZOIC CONTINENTAL-MARGIN ARCS, ISLAND ARCS,
AND LINKED SUBDUCTION ZONES
East Sikhote-Alin Continental-Margin Arc (Late Cretaceous)
East Sikhote-Alin volcanic-plutonic belt, Sorachi-Yezo,
West Sakhalin terrane.
Cretaceous and early Tertiary.
Igneous overlap assemblage Axial part of arc.
Hidaka accretionary-wedge, younger part of
the Aniva, Nabilsky, and Tokoro terranes.
Permian to Cretaceous.
Okhotsk-Chukotka volcanic-plutonic belt and
Penzhina sedimentary basin.
Cretaceous and early Tertiary.
West-Kamchatka, Ekonay, and Yanranay
terranes.
Upper Paleozoic, Jurassic and Early
Cretaceous.
Olyutorka-Kamchatka, Iruneiskiy, Kronotskiy,
Shmidt, Terpeniya, and Nemuro terranes.
Late Cretaceous and Early Tertiary.
Vetlovskiy terrane.
Late Cretaceous and early Tertiary.
Accretionary wedge and
subduction zone
Okhotsk-Chukotka Continental-Margin Arc
Igneous overlap assemblage Axial part of arc.
Linked to East Sikhote-Alin arc. Remnants of
subduction of Ancestral Pacifi c oceanic plate.
Accretionary wedge Linked to Okhotsk-Chukotka arc. Remnants of
subduction of Ancestral Pacifi c oceanic plate.
Olyutorka Island Arc
Island arc Axial part of arc.
Accretionary wedge Linked to Olyutorka arc. Remnants of subduction
of Ancestral Pacifi c oceanic plate.
Kluane and Coast North Cascade Continental-Margin Arcs
Kuskokwim Mountains sedimentary, volcanic,
and plutonic belt, Alaska Range-Talkeetna
Mountains volcanic-plutonic belt, Coast-
North Cascade plutonic belt, and Kamloops
magmatic belt.
Late Cretaceous and early Tertiary.
Igneous overlap assemblage Axial part of arc.
Chugach terrane (the Late Cretaceous Valdez Accretionary wedge and
Linked to Kluane and Coast North Cascade arcs.
Group), older part of the Prince William ter- subduction zone
Remnants of subduction of ancestral Pacifi c
rane, and Pacific Rim terrane.
Late Cretaceous and early Tertiary.
oceanic plate.