| Title | Revised tectonostratigraphy of Yukon-Tanana and Slide Mountain terrane units in the Thirtymile Range and Wolf Lake areas, southern Yukon: preliminary field results |
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| Author | Cleven, N R; Ryan, J J; Zagorevski, A ; Hayward, N |
| Source | AME Roundup 2019; 2019 p. 1 |
| Year | 2019 |
| Alt Series | Natural Resources Canada, Contribution Series 20190399 |
| Meeting | AME Roundup 2019; Vancouver, BC; CA; January 28-31, 2019 |
| Document | book |
| Lang. | English |
| Media | digital |
| Province | Yukon |
| NTS | 105B/11; 105B/12; 105B/13; 105C/09; 105C/10; 105C/11; 105C/14; 105C/15; 105C/16 |
| Area | Thirtymile Range; Wolf Lake |
| Lat/Long WENS | -133.1667 -131.2500 61.2500 60.5833 |
| Subjects | tectonics; stratigraphy; Science and Technology; Nature and Environment; regional geology; structural geology; geochemistry; petrogenesis; lithostratigraphy; tectonostratigraphic zones; modelling;
ophiolites; bedrock geology; lithology; igneous rocks; volcanic rocks; volcaniclastics; basalts; tholeiites; intrusive rocks; sedimentary rocks; conglomerates; clastics; limestones; metamorphic rocks; metavolcanic rocks; metasedimentary rocks;
provenance; structural features; folds; shearing; structural trends; tectonic history; intrusions; dykes; subduction zones; metamorphism; deformation; foliation; textural analyses; sutures; Canadian Cordillera; Yukon-Tanana Terrane; Slide Mountain
Terrane; Jones Lake Formation; Finlayson Assemblage; Klinkit Assemblage; Snowcap Assemblage; Cassiar Terrane; Ancestral North America Terrane; Phanerozoic; Mesozoic; Triassic |
| Program | GEM2: Geo-mapping for Energy and Minerals Western Cordillera, Devonian and Permian structural architecture |
| Released | 2019 01 28 |
| Abstract | The nature of individual terranes, relationships between terranes, and the timing of major accretion and orogenic collision events is still poorly understood in the northern Cordillera in Yukon, British
Columbia and Alaska. The study area of this work is situated to encompass units that may span a suture zone, considering that the accretion of the Yukon Tanana terrane (YTT) to the North American (NA) margin must have involved a major collisional and
orogenic event. Locally, supracrustal rocks on the eastern margin of the YTT are structurally juxtaposed with the Cassiar terrane, a sliver of the ancestral NA margin, presumably along a terrane boundary that is possibly a suture zone. However, the
timing, extent and products of the collision and suturing process have yet to be explicitly defined in terms of what collided, and exactly when. The presence of Slide Mountain terrane (SMT) units as potential suprasubduction ophiolite slivers, units
of eclogitic rocks, and regions with a steep metamorphic gradient are indications that the study area is suitable to examine collisional tectonic and accretionary processes and effects. The general objectives of field work carried out under the
Geological Survey of Canada's GEM Cordillera project in the summer of 2018 were to map the the geology of the Thirtymile range, establish the petrogenesis of Slide Mountain ophiolite fragments in the Wolf Lake region, and evaluate the nature of late
conglomerate deposits. |
| GEOSCAN ID | 321674 |
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