2019
DOI: 10.4095/313636
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Superimposed auriferous structural events along the Llewellyn-Tally Ho deformation corridor in southern Yukon and northwest British Columbia

Abstract: The Llewellyn-Tally Ho deformation zone in northwest British Columbia and southern Yukon demarcates the eastern limit of the Nisling terrane and the western limit of the Stikine terrane and has spatially related epithermal, mesothermal, and intrusion-related gold deposits and occurrences. The Llewellyn fault is a southeast-striking, steeply dipping brittle dextral strike-slip structure that overprints 'early' penetrative fabrics and ductile deformation. The Tally Ho shear zone, in the Yukon, represents an earl… Show more

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“…The Llewellyn fault zone is a subvertical, brittle-ductile deformation zone that was episodically active from the Cretaceous to the Eocene [42,43], though older, Triassic motion has been inferred [8]. The Yukon-Tanana terrane in the Atlin Lake area has been subdivided into the Florence Range and the Boundary Ranges metamorphic suites (Figure 2; see review in [8]).…”
Section: Geology Of the Atlin Lake Areamentioning
confidence: 99%
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“…The Llewellyn fault zone is a subvertical, brittle-ductile deformation zone that was episodically active from the Cretaceous to the Eocene [42,43], though older, Triassic motion has been inferred [8]. The Yukon-Tanana terrane in the Atlin Lake area has been subdivided into the Florence Range and the Boundary Ranges metamorphic suites (Figure 2; see review in [8]).…”
Section: Geology Of the Atlin Lake Areamentioning
confidence: 99%
“…Alternatively, earliest Jurassic metamorphic detritus may have come from elsewhere in the Yukon-Tanana terrane, which experienced Barrovian metamorphism during the Early Jurassic (Table 1; see Section 7.3.2). The modern proximity of metamorphic detritus-containing Laberge Group and Florence Range suite is in part controlled by strike-slip displacement along structures such as the Llewellyn fault zone [42,43]; however, along-basin sediment transport in the Laberge Group throughout the Jurassic [113] may have sourced metamorphic detritus from the Yukon portion of the Yukon-Tanana terrane.…”
Section: Jurassic To Cretaceous Metamorphism and Consequencesmentioning
confidence: 99%