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TitleGeology of the Cry Lake and Dease Lake map areas, north-central British Columbia
AuthorGabrielse, H
SourceGeological Survey of Canada, Bulletin 504, 1998, 147 pages (12 sheets), (Open Access)
PublisherNatural Resources Canada
MapsPublication contains 28 maps
Map Info.geological, structural, lithological, 1:250,000
Map Info.geological, structural, lithological, 1:100,000
Map Info.surficial geology, glacial features, 1:250,000
Mediapaper; on-line; digital
RelatedThis publication contains the following publications
File formatpdf
ProvinceBritish Columbia
NTS104I; 104J
AreaCry Lake; Dease Lake; Stikine River; Tanzilla Plateau; Taku Plateau; Tuya River; Turnagain River; Cassiar Mountains
Lat/Long WENS-132.0000 -128.0000 59.0000 58.0000
Subjectsigneous and metamorphic petrology; stratigraphy; tectonics; structural geology; lithology; stratigraphic correlations; stratigraphic analyses; faults; folds; structural interpretations; faults; faults; folds; structural features; tectonic setting; tectonic environments; tectonic evolution; deformation; metamorphism; metamorphic rocks; sedimentary rocks; terranes; mineral deposits; placer deposits; gold; silver; copper; zinc; asbestos; jade; molybdenum; cleavage; lineations; potassium argon dates; radiometric dates; mineral occurrences; analyses; major element analyses; trace element analyses; geochemical analyses; invertebrates; biostratigraphy; fossil descriptions; bedrock geology; fossils; fossil zones; Pleistocene; Holocene; Eocene; Upper Cretaceous; Lower Cretaceous; Upper Jurassic; Middle Jurassic; Lower Jurassic; Ingenika Group; Swannell Formation; Tsadiz Formation; Espee Formation; Stelkuz Formation; Atan Group; Boya Formation; Rosella Formation; Kechika Formation; Road River Formation; Sandpile Formation; Ramhorn Formation; McDame Formation; Earn Group; Ancestral North America; Slide Mountain Terrane; Kootenay Terrane; Nizi Creek pluton; Meek Creek pluton; Quesnellia Terrane; Shonektaw Formation; Nazcha Formation; Cow Lakes pluton; Eaglehead pluton; Cache Creek Terrane; Cache Creek Complex; Kedahda Formation; French Range Formation; Teslin Formation; Horsefeed Formation; Kutcho Formation; Sinwa Formation; Inklin Formation; Stikinia Terrane; Stuhini Group; Kaketsa pluton; Mansfield Creek pluton; Cariboo Meadows pluton; Latham Creek pluton; Gnat Lakes ultramafite; Cake Hill pluton; Beggerlay Creek pluton; Tahltan pluton; McBride River pluton; Tanzilla pluton; Pallen Creek pluton; Three Sisters pluton; Bowser Lake Group; Tachilta Lakes pluton; Granite Lake pluton; Snowdrift Creek pluton; Cassiar Batholith; Turnagain pluton; Beady Creek pluton; Sustut Group; Tango Creek Formation; Snow Peak Granite; Little Eagle pluton; Tanzilla Canyon Formation; Sloko Formation; Major Hart pluton; Meehaus pluton; Tuya Formation; Kechika fault; Quaternary; Tertiary; Cretaceous; Jurassic; Triassic; Permian; Mississippian; Pennsylvanian; Devonian; Silurian; Ordovician; Cambrian; Proterozoic
Illustrationssketch maps; cross-sections; analyses
Released1998 11 01; 2013 10 22
AbstractCry Lake and Dease Lake map areas include six well defined terranes each characterized by distinctive lithological assemblages of different ages, structural styles, and contained mineral deposits.
Miogeoclinal strata of Ancestral North America range in age from Late Proterozoic to Early Mississippian. They have been intruded by voluminous Mesozoic and Cenozoic granitic rocks, in places associated with tungsten, lead, and zinc occurrences.
The Slide Mountain Terrane contains Devonian to Permian rocks typical of oceanic and island arc environments. The Kootenay(?) Terrane is characterized by strongly tectonized, mainly weakly metamorphosed, siliceous strata. Ultrabasic rocks have potential for jade occurrences and a few vein deposits of lead, zinc, gold, and silver have been explored.
Rocks assigned to Quesnellia are of Mesozoic island arc lithologies. In one locality, granodiorite is host to an important copper deposit. Low grade nickel and chromite deposits are hosted by an Alaskan-type ultramafic body.
The Cache Creek Terrane is dominantly oceanic in lithology but includes some assemblages of island arc or rift affinity. The terrane ranges in age from Devonian through Early Jurassic. Ultrabasic rocks host jade and asbestos deposits and are spatially related to numerous placer gold deposits. The island arc or rift volcanics host a large zinc and copper volcanogenic sulphide deposit.
Rocks of Stikinia represent upper Paleozoic to Lower Jurassic island arc assemblages which are overlain by upper Mesozoic to Recent sedimentary and volcanic overlap assemblages. Copper, molybdenum, gold, lead, and zinc occurrences are found in the volcanic and plutonic rocks. Coal occurs locally in overlap sedimentary rocks.