Abstract: The TBMB claim group, 4 km southwest of the Dan occurrence in the upper Swift River area of stratiform zinc occurrences, reveals the nature of the host rocks and style of folding. A train of east-southeast-trending, east-northeast-verging, km-scale F1 overturned anticlines and synclines dominates the area. These folds clearly control the distribution of low metamorphic grade tectonites (in map and vertical cross-sections) and a structural model allows definition of general stratigraphy of the TBMB and BOUND claim areas. A lower, an intermediate, and an upper unit of siliciclastic metasedimentary rocks are separated by two intervening units of base-metal -sulphide-bearing strata (acid to intermediate metavolcanic rock and marble, respectively). Based upon the repetitive F1 folds (possibly associated with thrust faults) and the similarity of rock types in the TBMB and Dan areas, the authors propose a structural linkage between them.

Authors: D'el-Rey Silva, L.J.H., Liverton, T., Roots, C., and Paradis, S.

Keywords: Structural Geology

NTS Mapsheet(s): 105B

Citation: D'el-Rey Silva, L.J.H., Liverton, T., Roots, C., and Paradis, S., 2001. A structural analysis of the upper Swift River area, southeast Yukon (105 B/3), Part II: The TBMB claims and implications for the regional geology. In: Yukon Exploration and Geology 2000, Emond, D.S. and Weston, L.W. (eds.), Exploration and Geological Sciences Division, Yukon Region, Indian and Northern Affairs Canada, p. 301-310.

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