A structural analysis of the upper Swift River area (105 B/3), Yukon, Part I: Dan Zn occurrence and implications for sulphide mineralization

Marble, calc-silicate rock and pelitic layers of the Ram Creek assemblage surrounding the Dan Zn (± Cu-Pb-Ag) occurrence display ample evidence of a monocyclic structural evolution with three main events of progressive deformation (D1-D3). These events developed a tightly folded package of west-northwest-trending tectonites. Primary planar structures (S0) generally lie sub-parallel to two tectonic foliations (S1 and S2), which dip shallowly to steeply southwest. Inter-foliation slip (D3) resulted in a transverse, sub-vertical foliation (S3) that dips generally shallowly to moderately north. Cross-sections based on new mapping and fold analysis indicate that similar folds containing stratabound zinc-sulphide mineralization should be present south of the Dan occurrence, as part of regional north-northeast-verging folds or a thrust-fault-repeated succession.

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Last Updated April 17, 2026, 21:11 (UTC)
Created April 17, 2026, 21:11 (UTC)
contact_email eservices@gov.yk.ca
contact_person {"en": "Yukon Geological Survey", "fr": "Yukon Geological Survey"}
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open_canada_date_published 2011-04-04 00:00:00
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