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Stratigraphy summary for southeast Yukon (NTS 95D/8 and 95C/5)
Sedimentary strata located within NTS map sheets 95C/5 and 95D/8, southeast Yukon, have a combined thickness ranging between 5000 and 15000 m and depositional ages ranging from Proterozoic to Paleocene. They can be grouped into eight successions with formations within each succession indicating either similar depositional environments or a horizontal or vertical lithological facies zonation. Early to middle Paleozoic successions are best exposed; Proterozoic, Late Paleozoic, Mesozoic and Cenozoic successions are only locally exposed. Many of the successions are bounded by unconformities; some also contain internal depositional hiatuses. The deposition and preservation of the successions reflect the regional tectonic framework of the Canadian Cordillera from Neoproterozoic to present.
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Bedrock geology of NTS 95C/5 (Pool Creek) and NTS 95D/8 map sheets, southeast Yukon
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Map sheets 95C/5 and 95D/8 in southeast Yukon contain eight successions of sedimentary rocks ranging from Proterozoic to Paleocene in age. Early to middle Paleozoic starta are best preserved. Proterozoic strata have been tentativel correlated with Pinguicula Group, Mackenzie Mountains Supergroup and Windermere Supergroup. Newly defined Cambrian-Ordovician Crow Formation documents shallow water to suaerial siliciclastic sedimentary rocks related to a paleogeographic high.
Intrusive suites and major stratigraphic-tectonic successions (NTS 105K/2,3,5,6,7,11), central Yukon (1:100,000 Scale)
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not_specified
Preliminary Geological Map of Division Mountain Area (105E/5-West Half and 115 H/8 East Half), Central Yukon (1:50 000 scale)
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Includes geological cross sections, mineral occurrences, fossil localities, and marginal notes on physiography and stratigraphy.
Geological map of Truitt Creek (NTS 105L/1), central Yukon (1:50 000 scale)
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Includes a geological cross section, mineral occurrences, and isotopic age dates.
Updates on the Middle Triassic-Middle Jurassic stratigraphy and structure of the Teslin Mountain and east Lake Laberge areas, south-central Yukon
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not_specified
Progress report on geological mapping in the upper Hyland River region of southeastern Yukon (parts of NTS 105H/08,09,10,15,16 and 105I/02)
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not_specified
Preliminary geological map of part of the 'Tuchitua River North' area (105H/4), southeastern Yukon
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Preliminary geological map includes mineral occurrences and isotopic age dates.
Bedrock geology at the boundary between Yukon-Tanana and Cassiar terranes, Truitt Creek map area (NTS 105L/1), south-central Yukon
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The Tummel fault zone, a northwest-trending belt of rocks of uncertain age and/or tectonic affinity, separates Paleozoic miogeoclinal strata of Cassiar Terrane from Yukon-Tanana Terrane metavolcanic and metasedimentary rocks. Northeast of the fault, Cassiar Terrane comprises pelitic and semipelitic rocks with rare amphibolite, which are correlated with the Kechika Group. These are overlain by carbonate correlated with the Askin Group. Southwest of the fault, in Yukon-Tanana Terrane, Devono-Mississippian siliciclastic rocks are overlain by Mississippian arc volcanic rocks. Granodiorite and diorite of the Telegraph Plutonic Suite (348-350 Ma) intrude the siliciclastic rocks. Foliated greenstone, leucogabbro intrusions, serpentinite and chert occur in the Tummel fault zone. The Early Cretaceous Glenlyon Batholith intrudes strata of Cassiar Terrane. Contact metamorphism recognized across the Tummel fault zone is interpreted to have been imposed by the Glenlyon Batholith. If correct, this interpretation requires that post-mid-Cretaceous displacement across the Tummel fault zone has been minimal (~5 km).
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
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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.
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