Geoscience Map 1997-1: Geology of the Tagish Lake Area
NTS (104M/8,9,10E, 15 and 104N/12W)
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Superseded by Bulletin 105
Scale 1:100 000
The Tagish Lake area has been recognized as an important mineral belt since 1896, when hoardes of placer miners bound for the Klondike passed through it. It continues to be a focus for mineral exploration, but today these are guided by a respect for the geological diversity and complexity of the area. Geoscience Map 1997-1 encompasses critical components of the terrane architecture in the northern Intermontane Belt. From east to west these include: oceanic crustal rocks of the Cache Creek Terrane, overlap strata of the Whitehorse Trough, volcanic arc strata and metamorphic basement of Stikine Terrane, metamorphosed continental margin rocks of the Nisling Terrane and volcano-plutonic complexes adjacent to the Coast belt.
Two crustal scale faults, the Llewellyn and Nahlin, are focal points because they juxtapose terranes and are loci of gold mineralization, including the Engineer and Venus Mines. Map 1997-1 illustrates the relationships between mineral occurrences and tectonic features in an area of high mineral potential extending from south of Tagish Lake to the BC-Yukon border.
All printed publications of the BC Geological Survey are available digitally, free of charge, from this website.
For questions or more information on geology and minerals in British Columbia contact BCGS Mailbox or call toll free (BC Residents only).