AndreaBozzo/ceres-open-data-index huggingface dataset:
‘Windy-McKinley’ terrane, western Yukon: new data bearing on its composition, age, correlation and paleotectonic settings

New geochronological and geochemical data from the ‘Windy-McKinley’* terrane provide insight into the age, correlation and paleotectonic settings of the various subdivisions of the terrane. U-Pb zircon age determinations for felsic meta-volcanic rocks of the White River formation and gabbro intrusions are Late Devonian and late Middle Triassic respectively. These new age determinations substantiate the proposed correlation of these components of ‘Windy-McKinley’ terrane with the succession on strike to the northwest which hosts the volcanogenic massive sulphide deposits in the Delta District, Alaska. Trace-element geochemical data from Triassic gabbro intrusions into the Mirror Creek and White River formations, and diabase and gabbro of the Harzburgite Peak-Eikland Mountain ophiolite suggest that magmatism in both subdivisions occurred in supra-subduction zone settings. However, the age of the ophiolite is not known, therefore mafic magmatism may not be coeval across the terrane and may have formed above different subduction zones at different times.
*Quotes are used to indicate that the assignment to Windy and McKinley terranes is obsolete, but a new name has not yet been assigned.

Organization: Government of Yukon | Gouvernement du Yukon
Till geochemistry of the Finlayson Lake (105G), Glenlyon (105L) and east Carmacks (115I) map areas, Yukon Territory

This open file contains a compilation of the till geochemistry data for two regions of southern Yukon: 1) Finlayson Lake (105G) and, 2) Glenlyon (105L) and east Carmacks (115I) map areas. Till sampling was conducted during the 2001 and 2002 field seasons as part of the Yukon Targeted Geoscience Initiative (TGI), a joint program involving the Yukon Geological Survey and Geological Survey of Canada. Geochemical analyses have been conducted on the clay- (<0.002 mm) and silt and clay (<0.063 mm, -230 mesh) sized fractions by inductively coupled plasma mass spectrometry (ICP-MS) following an hydrochloric-nitric acids, and demineralized water digestion (HCl:HNO3:H20). Given the occurrence of emerald (a gem variety of beryl) at Regald Ridge in the Finlayson Lake map area, beryllium analyses were conducted on the silt and clay-sized fraction by ICP-MS following a lithium metaborate (LiBO2) fusion.

Organization: Government of Yukon | Gouvernement du Yukon
Total field magnetic, Wernecke Mountain Aeromagnetic Survey, NTS 106B (NW quadrant), Yukon

This map of the magnetic total field was derived from data acquired during an aeromagnetic survey carried out by Fugro Airborne Surveys during the period April 17, 2006 to August 26, 2007. The data were recorded using a split-beam cesium vapour magnetometer (sensitivity = 0.005 nT) mounted in the tail boom of a Cessna Caravan aircraft. The nominal traverse and control line spacings were, respectively, 800 m and 2600 m, and the aircraft flew at a nominal terrain clearance of 250 m. Traverse lines were oriented N30 degrees E with orthogonal control lines. The flight path was recovered following post-flight differential corrections to the raw Global Positioning System data and inspection of ground images recorded by a vertically-mounted video camera. The survey was flown on a pre-determined flight surface to minimize differences in magnetic values at the intersections of control and traverse lines. These differences were computer-analysed to obtain a mutually levelled set of flight-line magnetic data. The levelled values were then interpolated to a 200 m grid. The International Geomagnetic Reference Field was not removed from the magnetic total field.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary results from water sampling in the Pelly-Cassiar Platform volcanic belt, southeastern Yukon

Water and sediment samples were collected from 13 creeks/springs which drain the Devono-Mississippian Pelly Mountains volcanic belt that hosts the Wolf and MM volcanogenic massive sulphide (VMS) deposits. Preliminary results indicate that water and sediment sampling may be a viable method of exploration for VMS mineralization in this area. A creek draining the Wolf zinc-lead-silver deposit has elevated levels of lead and zinc in water and sediment samples. A sediment sample from the MM zinc-lead-copper deposit drainage is elevated in silver, copper and lead, but not zinc. A creek draining the Fire (Chzerpnough) prospect has elevated levels of barium, lead and zinc in sediment and cadmium, nickel and zinc in water.

Each creek sampled has a distinctive white precipitate, coating the rocks, sediment and vegetation in the creek bed, that is likely composed of aluminium hydroxide or aluminium and calcium sulphate.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary stratigraphic and geotechnical investigations of the glaciolacustrine and loess deposits around the city of Whitehorse (NTS 105D/11), Yukon.

This paper presents the preliminary results of a study investigating the stratigraphy and basic geotechnical properties of the surficial geology deposits observed in the bluffs around the city of Whitehorse. A total of eleven sections were examined on both the east and west banks of the Yukon River. Representative stratigraphic units were analysed for grain size distribution; deposits ranged in size from silt and clay to coarse gravel. Most of the observed sediments represent the glaciolacustrine depositional environment of Glacial Lake Laberge with the exception of a loess unit exposed near the top of the sections. Consistency indices of seven silt and clay-rich samples collected in the bluffs surrounding Whitehorse indicate a low plasticity comparable with other Canadian loess units and the glaciolacustrine bluffs around Kamloops and in the Elk Valley of British Columbia. The soil unconfined compressive strength was estimated using a pocket penetrometer and the dry silt and clay-rich units were found to have strength estimates up to two orders of magnitude greater than the sand-rich units.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary results of 1:50 000-scale geologic mapping in Wolverine Creek map area (115 I/12), Dawson Range, southwest Yukon

The oldest rocks in Wolverine Creek map area belong to a Devono-Mississippian metamorphic assemblage consisting of heterogeneous quartzite and orthogneiss. The quartzite unit is commonly micaceous, and includes interlayered metapelite, metacarbonate, and amphibolite interpreted as metamorphosed mafic igneous rock. The orthogneiss is dominated by leucocratic, medium to coarse-grained metaplutonic rock, and mesocratic to melanocratic, fine to medium grained metaplutonic and probably metavolcanic rock. Fabrics in the metamorphic assemblage indicate two pre-Early Jurassic tectonic events, the youngest of which involved top-to-the-north shearing. Regional amphibolite grade metamorphism led to the development of migmatite in the metapelite and orthogneiss, and recrystallized hornblende in the orthogneiss.

The metamorphic rocks are crosscut by post-tectonic intrusions including:: quartzo-feldspathic pegmatite, spinel peridotite, and alkalic syenite of Early Jurassic Minto Plutonic Suite; and quartz monzonite of Middle Cretaceous Dawson Range Batholith. These metamorphic and plutonic rocks are nonconformably overlain by a thick (about 700 m) succession of mafic lava flows, and tuffs of Upper Cretaceous Carmacks Group. Monzo-syenite plutons and a rhyolite plug are regarded as cogenetic, epizonal equivalents of Carmacks Group. Major faults, including Big Creek Fault, Wolverine Creek Lineament, and probably Hoochekoo Fault, were active during Carmacks Group volcanism. Porphyry, vein and skarn mineralization are associated with each of the post-tectonic magmatic events.

Organization: Government of Yukon | Gouvernement du Yukon
Hydrothermal zoning in the Keno Hill Ag-Pb-Zn vein system; a study in structural geology, mineralogy, fluid inclusions, and stable isotope geochemistry

A copy of this thesis is available at the EMR library – QE195.L96 1989.
This thesis is available online at https://doi.org/10.7939/R38K75524

Organization: Government of Yukon | Gouvernement du Yukon
2009–10 Supplementary estimates no. 3

Supplementary estimates no. 3 for the Government of Yukon 2009–10 Budget. 
This document was prepared by the Department of Finance under the direction of Management Board for the 1st Session of the 32nd Legislature, Yukon Legislative Assembly. September 2010, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Bedrock Geology and Mineralization of the Klondike Area (East), 115O/9,10,11,14, 15,16 and 116B/2, Yukon

Geological map (1:50,000 scale) of the East Klondike area, central Yukon (NTS 115O/9,10,11,14,15,16 and 116B/2) including marginal notes on geologic history, economic geology and mineral occurrences.

Organization: Government of Yukon | Gouvernement du Yukon
The cryostratigraphic and isotopic characteristics of muck deposits, Klondike area, Yukon Territory

A copy of this thesis is available at the EMR library – QE697.K68 1998
A copy of this thesis can be downloaded from https://curve.carleton.ca/636c5e10-350f-4bb8-9452-eb7b021ec0ae.

Organization: Government of Yukon | Gouvernement du Yukon
Metamorphism of Sedimentary Rocks by Syenitic Intrusions in the Tombstone Range 116 A/4, Yukon Territory

Sedimentary and volcanic rocks ranging in age from Precambrian to Lower Cretaceous underlie the Tombstone area (116 A/4). The conditions of metamorphism of the sedimentary sequence underlying the study area are reflected by the stability field of the univariant assemblage tremolite-calcite-quartz-diopside. Assuming a pressure of 2 kb, the temperature of metamorphism lies between 475° and 525° C.

The mineralogical zoning displayed in the host rocks away from the syenite is interpreted as being essentially the consequence of a decreasing amount of dolomite in the original sediments.

Organization: Government of Yukon | Gouvernement du Yukon
Structural constraints for oil and gas assessment in the Whitehorse Trough: New results from seismic profiling

The Whitehorse Trough is a Mesozoic sedimentary basin in south-central Yukon that has been identified as an immature, gas-prone basin, based on a limited geoscience database. A total of 170 km of regional, multi-channel, multi-component Vibroseis seismic reflection data were acquired in 2004 across the northern Whitehorse Trough in order to improve understanding of its structural architecture. The shallow seismic images appear to depict broad antiformal and synformal structures, truncated by relatively steep faults. Strata interpreted as the Lewes River and Laberge groups seem to attain a maximum thickness of 6000-7000 m toward the west side of the Trough, with interpreted Laberge Group accounting for up to ~3000 m of this total. Maximum vertical relief of the structures is ~4000 m.

Organization: Government of Yukon | Gouvernement du Yukon
Airborne Electromagnetic and Magnetic Survey, Jakes Corner Project, Yukon

Digital data from airborne EM and MAG geophysical surveys of the Jakes Corner Project, southwestern Yukon (NTS 105D/8,9 and 105C/5,12). Files include GEOSOFT XYZ files (with documentation), GEOSOFT vectors, GEOSOFT grids and IPOWER grids.

Organization: Government of Yukon | Gouvernement du Yukon
Regional stream sediment geochemical data, Glenlyon area, central Yukon (NTS 105K west & 105L)

NGR surveys were originally conducted in the Glenlyon map area in 1988. Stream sediment and water samples were collected from a total of 1378 sample sites. A total of 1096 original samples were selected for reanalysis. Representative 2 gram splits were successfully recovered from 1095 samples. Samples were analysed by an ultra-trace aqua-regia digestion ICP-MS package for 53 elements.

Organization: Government of Yukon | Gouvernement du Yukon
Detoxifying Pit Lakes by Controlled Algal Blooms: Laboratory Study and Pilot Field Trial at little Creek Pond at Vangoda Pit near Faro, Yukon, Canada

When a mine closes, the open pit left behind often fills with water that washes metals from the pit walls. This water may be toxic and cannot be disharged without further treatment. This study evaluated the possibility of using algal blooms to remove toxic metals from pit lakes. The study had two components: laboratory tests and pit lake fertilization trials. The site for the field trial was Little Creek Pond, a small collection pond located at Vangorda Pit, near Faro, Yukon. The pond receives zinc-contaminated leachate from a waste rock dump and seepage from Vangorda Pit.Leachate is water that has percolated through soil or rock containing soluble substances such as zinc and that contains certain amounts of these substances in solution.
The laboratory study, using Little Creek Pond water, demonstrated that zinc could be removed by promoting an algal bloom. Its concentrations were decreased dramatically during the 56-day study (from starting concentrations of 55 mg/L down to 3 mg/L). An interesting finding was that zinc was removed if pond sediments were present, but not if they were absent. The high initial zinc concentrations may have been too toxic to allow the development of a strong algal bloom in the absence of sediments. This idea is supported by other recent studies, which reported that zinc could be removed from the water column at lower initial concentrations.
During the short field season at Little Creek Pond, good algal growth was promoted on pond sediments by addition of fertilizer. This is remarkable, considering that pond water contained over 200 mg/L, a highly toxic level. Nevertheless, zinc removal was not shown in the field trial. This may be partially explained by the short time abailable to produce the algal blooms and the fact that metal laden waters were continuously seeping into Little Creek Pond during the study. Our attempt to determine if zinc removal still occurred was frustrated by our inability to calculate an accurate water balance. This was due to a lack of reliable data on seepage flows and zinc concentrations, on water volumes in the pond, and on other possible inputs into the pond from groundwater.
A single measurement of zinc content in harvested algae (over 12g per kg wet weight) indicates that zinc was successfully absorbed by algae growing on sediments. However, this provides insufficient information to conclude that significant zinc removal occurred.
Despite these qualified results, aquatic phytoremediation appears to be a promising, low cost alternative to conventional lime treatment which has been used at mine sites in the past. We recommend that further studies be undertaken in pit lakes that contain lower zinc concentrations, such as the Grum pit, near Faro, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Placer Mining Settling Ponds (Volume 1) - Design Principles

This report reviews methods and criteria for placer mining settling pond design. The mining and processing of placer gold generates wastewaters containing high concentrations of fine sand, silt and clay. Reduction of sediment discharges is required primarily to minimize impacts of sediment and turbidity on the aquatic environment and fish. Sediment discharge control to avoid sedimentation of water supply intakes of downstream mining operations and to allow recycling of process water in water short areas are secondary factors.

Organization: Government of Yukon | Gouvernement du Yukon
Audiomagnetotelluric and broadband magnetotelluric data for geothermal exploration in the Burwash Landing area

This report distributes the 34 audiomagnetotelluric (AMT) and 46 broadband magnetotelluric (BBMT) stations collected in the Burwash Landing region, Yukon, by Quantec Geoscience Ltd. from October 8 to November 2, 2021. The technical report in Appendix 1 contains details of the acquisition process, processing and preliminary modelling products. The AMT and BBMT soundings are released here are as EDI files (Appendix 2), 2D modelling products are released as GDB, GRD, and XYZ files (Appendix 3), and 3D modelling products are released as GDB, VOXEL and XYZ files (Appendix 4). Geographic positioning of AMT and BBMT stations and electrodes are provided in GDB and CSV formats (Appendix 5). The products released herein were provided by Quantec Geoscience Ltd. The final preferred 3D inversion model incorporating extremely low frequency electromagnetic (Witter, 2020), AMT and BBMT data, as well as details of that 3D modelling process can be found in Tschirhart et al. (2022).

References:
Witter, J.B., 2020. Early-stage exploration for geothermal energy resources along the Denali fault near Duke River, Yukon. Yukon Geological Survey, Open File 2020-3, 70 p.
Tschirhart, V., Colpron, M., Craven, J.A., Hormozzade Ghalati, F., Enkin, R.J., and Grasby, S.E., 2022. Geothermal exploration in the Burwash Landing region, Canada, using three-dimensional inversion of passive electromagnetic data. Remote Sensing, vol. 14, https://doi.org/10.3390/rs1423596.

Organization: Government of Yukon | Gouvernement du Yukon
Cache Creek terrane, Stikinia, and overlap assemblages of eastern Whitehorse (NTS 105D) and western Teslin (NTS 105C) map areas

Bedrock mapping of parts of the Whitehorse and Teslin map areas in the summer of 2012 has improved upon existing knowledge of the local geology from previous 1:250 000 scale mapping in the respective map sheets. Our mapping characterizes the nature of the Cache Creek terrane in Yukon, including the identification of a previously unknown siliciclastic package, informally named the Michie formation, a gabbroic intrusive complex, and the Marsh Lake intrusive complex, in addition to more typical oceanic lithologies. This mapping helps refine the structural history of the area and define the relationships between Cache Creek terrane and rocks of Stikinia and Whitehorse trough. Two main phases of compressional deformation have been identified: 1) an initial phase of west-verging thrusting, emplacing Cache Creek terrane rocks above rocks of Stikinia and the Whitehorse trough along the Judas Mountain thrust, a northern equivalent to the Nahlin fault; and 2) a subsequent, second phase of thrusting which reshuffles Stikinia and Whitehorse trough rocks onto the Cache Creek terrane along the east-verging Mount Michie thrust. Three main styles of mineralization were observed, associated with either ultramafic bodies or Cretaceous intrusions in the region.

Organization: Government of Yukon | Gouvernement du Yukon
Interpretation of an Airborne Multiparameter Geophysical Survey of the Northern Dawson Range, Central Yukon: A Progress Report

Much of the Yukon-Tanma Terrane escaped Pleistocene glaciation with the result that there is <1% outcrop across much of the terrane and weathered rock commonely extends to depths of >75m. Weathering has in many cases removed all obvious signs of mineralization and has resulted in the dispersion of soluble metals in the near surface. For these reasons, exploration based on traditional prospecting methods and soil geochemical surveys has met with limited success. Geological mapping is hindered by the lack of exposure and by the complex geology. To address these problems a detailed airborne geological sruvery, combining gamma ray spectrometric, magnetic and VLF sesors, was flown in the Dawson Range, central Yukon Tanana Terrane. Spectrometric data were used to determine the average surface concentration of potassium (K), uranium (U), and thorium (Th). Lithological units are characterized by relatively consistent geochemical signatures permitting improved geological mapping based on the distribution of spectrometric domains. Alteration halves, commonly characterized by the addition of K and magnetite, are identifiable as areas of low Th'K rations and as total field magnetic highs.

Organization: Government of Yukon | Gouvernement du Yukon
Drift prospecting and till geochemistry in Tintina Trench, southeastern Yukon

A copy of this thesis is available at the EMR library – QE579 P66.
This thesis is available online at https://curve.carleton.ca/f7ba3e6b-1aee-4bca-9649-b9c989517ead.

Organization: Government of Yukon | Gouvernement du Yukon
Surficial geological mapping of the central Kluane Ranges (parts of NTS 115G/1, 2, 3, 7 and 115B/15, 16), southwestern Yukon

Surficial geological mapping in the central Kluane Ranges was undertaken to better understand the distribution and character of surficial materials. Upland surficial materials in the area are dominated by near-source bedrock derivatives. Valley bottom settings, including Shakwak trench and Duke River valley, are characterized by broad open valleys with thick deposits of Quaternary sediment. Permafrost is discontinuous in the study area and its character is affected by slope and aspect, topography and material texture. Mass wasting processes in the study area include rock fall and avalanches, debris flows and avalanches and active layer detachment slides. The distribution and character of surficial materials has significance for soil geochemical sampling programs and infrastructure and implications for mineral exploration and developments are addressed.

Organization: Government of Yukon | Gouvernement du Yukon
Soil reconnaissance of the Fort Selkirk volcanic field, Yukon (115I/13 and 14)

Valley-filling basalts of the Selkirk Volcanics north and west of the Pelly River-Yukon River confluence, range in age from early Pleistocene to Holocene. Soils formed on the older surfaces have complex parent materials reflecting early Pleistocene glaciation and significant loess accumulation. A diamicton overlying the early Pleistocene basalt is covered by up to 1 m or more of calcareous loess, and shows no field evidence of weathering or soil formation. Middle Pleistocene basalt has a similar depth of loess cover and appears fresh and unweathered. Lava flows originating on the south side of the Volcano Mountain cinder cone display vegetation ranging from discontinuous lichen and moss cover to white spruce-aspen forest. Soil profile development varies correspondingly from almost nil to reddish-brown Brunisolic soils with ~30 cm of B horizon, depending on substrate age and/or the presence of lapilli deposits overlying the flows.

Organization: Government of Yukon | Gouvernement du Yukon
2022 Wildland fire management bulletins

Archived wildfire bulletins from 2022. See [current wildfire bulletins on Yukon.ca](https://yukon.ca/blogs/wildfire-bulletins).

Visit the Yukon's [Wildfires hub](https://wildfires.service.yukon.ca/) or the [text-only updates page](https://yukon.ca/en/emergencies-and-safety/wildfires/get-text-only-wildfire-updates) to get more information about current wildfire conditions in the Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
The Dawson City landslide (Dawson map area, NTS 116B/3), central Yukon.

A pre-historic pseudo-circular rock-slope failure at the northern edge of Dawson City, Yukon occurs in altered ultramafic rocks. The middle section of the landslide debris continues to move down-slope, as is evident from sheared trenches, stretched roots and split trees along its edges, and a steep snout exposing fresh material. Dendrochronological analysis demonstrated that the split trunk of one tree has displaced over the last 40 to 45 years at an average movement rate of 4.5 cm/year. This moving section of the debris could be characterized as a rock glacier or as an earth flow, although our present observations and measurements do not confirm either mechanism. A block upslope from the headscarp of the landslide exhibits signs of recent movement. To assess the movement rate of the different sections of the landslide in the future, a monitoring array was set up and an initial set of measurements was taken in July, 2006.

Organization: Government of Yukon | Gouvernement du Yukon