Find publications, data and maps managed by the
Yukon Geological Survey

YGS Publication Details


Reference Number
YEG2021_9
Title
Updated bedrock geology of the southern Nash Creek area in central Yukon (parts of NTS 106D/2, 3, 6 and 7)
Reference Type
Yukon Geological Survey
Document Type
Annual Report Paper


General Information

Abstract: The southern Nash Creek area is located along the northern boundary of the Selwyn basin, and is underlain mainly by the Ediacaran–Cambrian Hyland Group, the Devonian–Mississippian Earn Group and the Mississippian Tsichu Group. Several Au and polymetallic mineral deposits are hosted by the Hyland Group and Paleozoic platformal carbonate rocks in the surrounding region. The southern Nash Creek area is bordered by regional-scale, southeast-striking thrust faults, which include the Dawson thrust to the northeast and the Robert Service thrust to the southwest. Based on stratigraphic relationships identified during 1:50 000-scale bedrock mapping, Hyland Group rocks in the area are considered to belong to the Cryogenian–Ediacaran Yusezyu Formation, the Ediacaran Algae Formation and the Ediacaran–Terreneuvian Narchilla Formation. Earn Group rocks include mainly shale and lesser amounts of interbedded dolostone, sandstone and shale. Tsichu Group rocks mostly comprise quartzite. The Yusezyu and Narchilla formations host (Paleozoic?) gabbro sills, and the Earn and Tsichu groups host gabbro sills that are considered to belong to the Triassic Galena suite. Rocks in the southern Nash Creek area exhibit a northeast-to-southwest dipping foliation that is axial planar to southeast-trending folds.
Authors: Skipton, D.
NTS Mapsheet(s): 106D02, 106D03, 106D06, 106D07
Citation: Skipton, D., 2022. Updated bedrock geology of the southern Nash Creek area in central Yukon (parts of NTS 106D/2, 3, 6 and 7). In: Yukon Exploration and Geology 2021, K.E. MacFarlane (ed.), Yukon Geological Survey, p. 161–183.

Downloads

Name Comment
paper This pdf is 45MB. Download PDF

Location Map

NTS Mapsheet(s): 106D02, 106D03, 106D06, 106D07

Related Occurrences

Name Number Type Status

Related Publications

Number Relationship Authors Title
YEG2021 Contained By Yukon Geological Survey Yukon Exploration and Geology 2021