데이터셋 상세
캐나다
Orogen-perpendicular magnetic segmentation of the western Yukon and eastern Alaska cordilleran hinterland: Implications for structural control of mineralization
This contribution focuses on the analysis, characterization, and mineralization control of northeast-southwest oriented, magnetic heterogeneities of the allochthonous to parautochthonous Intermontane terranes of the North American Cordillera of western Yukon and eastern Alaska. Our interpretation of publically available magnetic datasets proposes sixteen zones of linear discontinuities oriented semi-perpendicular to the northwest-southeast Cordilleran deformation front and mid-Cretaceous Dawson Range magmatic arc. These magnetite-destructive corridors are interpreted as steeply dipping, brittle fault zones and fracture arrays of extensional, oblique-extensional, and strike-slip kinematics responsible for localized structural damage. Their spatial correlation with known mid to Late Cretaceous magmatic-hydrothermal mineralization suggests a first-order structural control in eastern Alaska, while a secondary role is interpreted for Yukon’s Dawson Range.
데이터 정보
연관 데이터
Northern Cordillera: Canada and Alaska
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for a copy of this paper please contact the Yukon Geological Survey; geology@gov.yk.ca.
Structural geology of the eastern Richardson Mountains, Yukon and Northwest Territories: Some field observations and a note of caution for palinspastic reconstructions
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The Richardson anticlinorium is a major tectonic feature marking the eastern limit of the Cordilleran orogen in northern Yukon and Northwest Territories. Limited structural observations on the eastern flank of the Richardson anticlinorium indicate that the strain intensity increases significantly close to major faults that are associated with deformation zones tens to hundreds of metres wide. A predominant dextral sense of motion is documented for several major faults belonging to the Richardson fault array. However, second-order features exhibit highly variable kinematics. In several cases, strike-slip faults cut shallower dipping faults and follow steep bedding planes, suggesting that dextral motion occurred in a previously deformed and tilted sedimentary succession. The amount of displacement along the Richardson fault array is poorly constrained. Further investigation is warranted as potential large displacements may bear significant consequences on palinspastic reconstructions.
The Cordillera of British Columbia, Yukon, and Alaska: Tectonics and Metallogeny
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for a copy of this paper please contact the Yukon Geological Survey; geology@gov.yk.ca.
The ore deposits of Alaska and the Yukon
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not_specified
A Palaeozoic Northwest Passage: incursion of Caledonian, Baltican and Siberian terranes into eastern Panthalassa, and the early evolution of the North American Cordillera
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for a copy of this paper please contact the Yukon Geological Survey; geology@gov.yk.ca.
Yukon Exploration and Geology 2017
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This volume contains 11 technical papers: E. Bordet - Bedrock geology of the Teslin Mtn and east Lake Laberge areas S.H. Ellis et al. - Clast fabric analysis of glacial diamict, Liard Lowlands T.A. Fraser et al. - Yukon shale studies overview M.A. Friend et al. - Bedrock geology of the Mt. Freegold district M.P. Hutchison - Devonian-Mississippian shale stata, Liard basin K.E. Kennedy - Evidence for limited glaciatin, northern Kluane Range T. Liverton and S. Casselman - Mod property, VMS mineralization M.J. Manor and S.J. Piercey - Chronostratigraphic framework, Finlayson Lake region D. Moynihan - Late Neoproterozoic limestone, Tillei and McPherson lakes A. Steiner et al. - Carlin-type gold mineralization, Nadaleen trend L.H. van Drecht and L.P. Beranek - Basal Laberge Group stratigraphy, Whitehorse trough
Evidence for the Paleozoic sinistral Porcupine Shear Zone in North Yukon (Canadian Arctic) and geotectonic implications
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for a copy of this paper please contact the Yukon Geological Survey; geology@gov.yk.ca.
Pre-Mississippian Stratigraphic Architecture of the Porcupine Shear Zone, Yukon and Alaska, and Significance in the Evolution of Northern Laurentia
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not_specified
Windy McKinley terrane, Stevenson Ridge area (115JK), western Yukon: composition and proposed correlations, with implications for mineral potential.
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Recent mapping in the ‘Windy McKinley’ terrane of Stevenson Ridge area of western Yukon defined two subdivisions of the terrane, an imbricated ophiolite and a succession of predominantly fine-grained, variably carbonaceous and calcareous clastic rocks extensively intruded by Middle Triassic gabbro. Further work in 2007 has revealed a third subdivision of felsic metavolcanic and carbonaceous clastic rocks, also spatially associated with voluminous gabbro. The two subdivisions of the terrane containing gabbro are reminiscent of the two subdivisions of the Delta district of Alaska, and gabbroic rocks from the two areas are coeval and geochemically similar. If the Stevenson Ridge successions correlate with those of the Alaska Range, the mineral potential of the Stevenson Ridge area would be appropriately increased.
Pre-Mississippian stratigraphy and provenance of the North Slope of Arctic Alaska II: Basinal rocks of the northeastern Brooks Range and their significance in circum-Arctic evolution
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for a copy of this paper please contact the Yukon Geological Survey; geology@gov.yk.ca.
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