Bulletin 100: Geology and Mineral Occurrences
of the Taseko-Bridge River Area
(NTS 092O/2,3; 092O/1; 092J/15,16)
Table of Contents
Cover, Summary, Table of Contents, Chapter One: Introduction (PDF document, 2.1 Mb)
Chapter Two: Lithologic Units (PDF document, 16.2 Mb)
Chapter Three and Four: Structure & Metamorphis; Mineral Occurrences (PDF document, 6.3 Mb)
Chapter Five: Tectonic Implications; References and Appendices (PDF document, 7.6 Mb)
View PDF Map (2 MB)
View DWF Map
Bulletin 100 describes the geology of a 3200-square-kilometre area covering NTS map sheets 92O/2, 3 and portions of sheets 92O/1, 92J/15, 16, which are mainly within the Chilcotin Ranges of the southeastern Coast Mountains. The area is underlain by late Paleozoic to Tertiary rocks that include the oceanic Bridge River Terrane, the volcanic arc-derived Cadwallader and Methow terranes, ophiolitic rocks of the Shulaps and Bralorne-East Liza complexes, and the Jura-Cretaceous clastic sedimentary rocks of the Tyaughton-Methow basin. These assemblages are juxtaposed across complex systems of contractional, strike-slip and extensional faults of mainly Cretaceous and Tertiary age. This Bulletin describes and defines the major lithotectonic units and the structures that deform and bound them. It also describes the mineral occurrences of the area, which includes the northern part of the Bridge River mining camp, and interprets their genesis in terms of the Cretaceous and Tertiary structural and magmatic evolution of the area. In the final chapter, regional correlations of lithotectonic assemblages and structures are discussed, and an interpretive summary of the tectonic evolution of the southeastern Coast Belt is presented. The report is accompanied by numerous photos, data tables, maps and illustrations, as well as a 1:100 000-scale geological map of the area with interpretive cross-sections.
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