| Titre | Revised tectonostratigraphy of Yukon-Tanana and Slide Mountain terrane units in the Thirtymile Range and Wolf Lake areas, southern Yukon: preliminary field results |
| |
| Auteur | Cleven, N R; Ryan, J J; Zagorevski, A ; Hayward, N |
| Source | AME Roundup 2019; 2019 p. 1 |
| Année | 2019 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20190399 |
| Réunion | AME Roundup 2019; Vancouver, BC; CA; janvier 28-31, 2019 |
| Document | livre |
| Lang. | anglais |
| Media | numérique |
| Province | Yukon |
| SNRC | 105B/11; 105B/12; 105B/13; 105C/09; 105C/10; 105C/11; 105C/14; 105C/15; 105C/16 |
| Région | Thirtymile Range; Wolf Lake |
| Lat/Long OENS | -133.1667 -131.2500 61.2500 60.5833 |
| Sujets | pétrogenèse; lithostratigraphie; zones tectonostratigraphiques; établissement de modèles; ophiolites; géologie du substratum rocheux; lithologie; roches ignées; roches volcaniques; volcanoclastique;
basaltes; tholéiites; roches intrusives; roches sédimentaires; conglomérats; roches clastiques; calcaires; roches métamorphiques; roches volcaniques métamorphosées; roches sédimentaires métamorphosées; origine; caractéristiques structurales; plis;
cisaillement; tendances structurelles; antécédents tectoniques; intrusions; filons rocheux; zones de subduction; métamorphisme; déformation; foliation; analyses de textures; sutures; Cordillère canadienne; Terrane de Yukon-Tanana; Terrane de Slide
Mountain ; Formation de Jones Lake ; Assemblage de Finlayson ; Assemblage de Klinkit ; Assemblage de Snowcap ; Terrane de Cassiar ; Terrane d'Ancestral North America ; tectonique; stratigraphie; Sciences et technologie; Nature et environnement;
géologie régional; géologie structurale; géochimie; Phanérozoïque; Mésozoïque; Trias |
| Programme | GEM2 : La géocartographie de l'énergie et des minéraux Architecture structurelle du Dévonien et du Permien de l'ouest de la Cordillère |
| Diffusé | 2019 01 28 |
| Résumé | (disponible en anglais seulement)
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 |
|
|