2019
DOI: 10.1130/ges02060.1
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Detrital zircon geochronology along a structural transect across the Kahiltna assemblage in the western Alaska Range: Implications for emplacement of the Alexander-Wrangellia-Peninsular terrane against North America

Abstract: The Kahiltna assemblage in the western Alaska Range consists of deformed Upper Jurassic and Cretaceous clastic strata that lie between the Alexander-Wrangellia-Peninsular terrane to the south and the Farewell and other pericratonic terranes to the north. Differences in detrital zircon populations and sandstone petrography allow geographic separation of the strata into two different successions, each consisting of multiple units, or petrofacies, with distinct provenance and lithologic characteristics. The north… Show more

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Cited by 27 publications
(54 citation statements)
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“…Thus, they interpreted the titanite age to record metamorphism associated with northwest-directed thrusting and folding of the Farewell terrane and older components of the Kahiltna assemblage to the north. In contrast, cleavage and bedding are moderately northwest dipping across much of the outcrop belt to the south, suggesting tight, south-vergent folds (Box et al, 2019). South-vergent deformation affected younger parts of the Kahiltna assemblage that have depositional ages younger than ca.…”
Section: Sediment Wedges and Complex Terrane Boundariesmentioning
confidence: 95%
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“…Thus, they interpreted the titanite age to record metamorphism associated with northwest-directed thrusting and folding of the Farewell terrane and older components of the Kahiltna assemblage to the north. In contrast, cleavage and bedding are moderately northwest dipping across much of the outcrop belt to the south, suggesting tight, south-vergent folds (Box et al, 2019). South-vergent deformation affected younger parts of the Kahiltna assemblage that have depositional ages younger than ca.…”
Section: Sediment Wedges and Complex Terrane Boundariesmentioning
confidence: 95%
“…Layered strata of the Dillinger and Mystic subterranes are deformed into a northwest-vergent, fold-and-thrust belt that is truncated on the north by the Denali fault. The age of folding and thrust faulting is not completely understood but is interpreted to predate final collision and translation of the Peninsular and Wrangellia terranes to the south (Box et al, 2019).…”
Section: Parautochthonous Yukon-tanana Assemblage and Farewell Terranementioning
confidence: 99%
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