Bedrock geology, Dorsey Lake, Yukon Territory

Roots, C F; Nelson, JL; Mihalynuk, Mitchell G.; T.B.Harms,; Keijzer, Martin de; Simard, R. L.

doi:10.4095/215617

Cited by 1 publication

(2 citation statements)

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“…188-184 Ma Logjam and Two Ladder plutons). Mafic to ultramafic gabbro, pyroxenite, and variably serpentinized dunite locally occur as border phases in some plutons (e.g., Roots et al, 2004). Hornblende-clinopyroxene syenite is present in plutons intruding the Yukon-Tanana terrane northeast of the Tintina fault (e.g., Banana pluton, Figures 2 and 3).…”

Section: Lokken Suitementioning

confidence: 99%

“…East of the BSTF, metaluminous plutons of the Lokken suite were emplaced at higher crustal levels into part of the Yukon-Tanana terrane that includes strata of the Klinkit assemblage, which are correlated with Paleozoic arc successions of Quesnellia in British Columbia (Lay Range assemblage; Ferri, 1997;Nelson & Friedman, 2004;Nixon et al, 2020;Roots et al, 2006;. The Lokken suite is generally more mafic than Early Jurassic plutons west of the BSTF and locally includes ultramafic phases (Roots et al, 2004). Upper Triassic rocks overlying Yukon-Tanana east of the BSTF are fine-grained siliciclastic rocks and local conglomerate that are inferred to correlate with those overlapping the western Laurentian margin (Beranek & Mortensen, 2011;Colpron, Mortensen, et al, 2006;Golding et al, 2016;Unterschutz et al, 2002).…”

Section: Redefining Terrane Boundariesmentioning

confidence: 99%

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Late Triassic to Jurassic Magmatic and Tectonic Evolution of the Intermontane Terranes in Yukon, Northern Canadian Cordillera: Transition From Arc to Syn‐Collisional Magmatism and Post‐Collisional Lithospheric Delamination

et al. 2022

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Crustal growth at convergent margins is generally thought to occur through accretion of juvenile arc crust and/ or addition of magmatic material to the edge of a craton (e.g., Rudnick, 1995). Arc-continent collision zones are thus major sites for crustal growth through time (e.g., Brown et al., 2011). Arc accretion generally leads to development of an accretionary orogen, associated magmatism and basin(s) (e.g., Cawood et al., 2009;Draut & Clift, 2012). The evolution of arc-continent collision zones is generally complex and shows a wide-range of variations depending on configuration of continental and arc crusts, and angle and rates of convergence (Brown et al., 2011). There is no simple model that explains the variations observed in modern and ancient arc-continent collisions.In western North America, the development of the northern Cordilleran accretionary orogen began with collision of early Mesozoic peri-Laurentian arcs with the continental margin in latest Triassic to

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Section: Lokken Suitementioning

confidence: 99%