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Pre-Mississippian Stratigraphic Architecture of the Porcupine Shear Zone, Yukon and Alaska, and Significance in the Evolution of Northern Laurentia
not_specified
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연관 데이터
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 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.
Aspects of the Quaternary evolution of the plateau regions of the northern Ruby Range, southwest Yukon Territory
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not_specified
Pleistocene geology of the Snag-Klutlan area, southwestern Yukon, Canada
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not_specified
Jurassic stratigraphy and tectonic evolution of the Whitehorse trough, central Yukon: Project outline and preliminary field results
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not_specified
Lower and Middle Jurassic stratigraphy and ammonite fauna of the northern Whitehorse Trough, Yukon, Canada
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A copy of this thesis is available at the EMR library – QE681.C43 2000.
New U-Pb geochronology of Early Cretaceous porphyry and skarn mineralization in southwest Yukon
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not_specified
Origin and diagenesis of the Manetoe Facies, southern Yukon and Northwest Territories, Canada
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A copy of this thesis is available at the EMR library – QE665.A86 1987.
Age, geochemistry, paleotectonic setting and metallogeny of Late Triassic-Early Jurassic intrusions in the Yukon and eastern Alaska: A preliminary report
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Late Triassic to Early Jurassic age (~220-185 Ma) intrusions comprise one of the most widespread and volumetrically significant plutonic suites in central and western Yukon, and eastern Alaska, but have received very limited study thus far. A new research project has been initiated that will examine the temporal, geochemical and petrotectonic evolution of this magmatic event, and the nature and origin of associated Cu, Au and PGE mineralization. The intrusions are mainly hornblende- and biotite-bearing granodiorites and quartz monzonites, although granitic phases and rare ultramafic phases (as at Pyroxene Mountain) are also present. Several bodies of coarse-grained muscovite granite that are included within the suite have been recognized in southwestern Dawson, and central and western Stewart River map areas. Most intrusions give preliminary U-Pb zircon and titanite ages of ~195 Ma to ~185 Ma, although scattered bodies give ages up to 218 Ma. Geochemical studies completed thus far indicate that most intrusions are metaluminous and formed in a volcanic arc environment, although some of the muscovite-granite phases in western Yukon are peraluminous and trend into the anorogenic (within-plate) granite field on various tectonic discriminant plots. Dating studies at Minto and Williams Creek indicate that copper-gold mineralization in both areas is hosted in part by deformed intrusions dated at ~194 Ma and is crosscut by massive, post-mineralization Granite Mountain batholith dated at ~190 Ma. The mineralization is therefore intimately associated with the Triassic-Jurassic magmatism, and we tentatively interpret the deposits as deformed copper-gold porphyries.
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.
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