AndreaBozzo/ceres-open-data-index huggingface dataset:
Yukon Coal Inventory

Coal is found in Mississippian, Jurassic, Cretaceous and Tertiary non-marine sequences which underlie as much as 37,000 km² of the Yukon Territory (Long, 1985). However, very little of this vast area of potential coal-bearing rocks has been examined in any detail and the extent of coal deposits is largely unknown.

Coal occurrences are known in seven areas: 1) in the Paleogene Amphitheatre Formation in the Kluane area; 2) within Jura-Cretaceous sedimentary rocks of the Laberge Group and Tantalus Formation deposited in the Whitehorse trough in the Carmacks, Braeburn and Whitehorse areas; 3) in Tertiary sedimentary rocks in the Dawson, Pelly River, Ross River and Watson Lake areas located in the Tintina Trench; 4) within Late Cretaceous sedimentary rocks in the Indian River area; 5) in Eocene sedimentary rocks of the Rock River Basin; 6) within the mid-Cretaceous to Tertiary strata of the Bonnet Plume basin; and 7) in Mississippian sedimentary rocks of the Kayak Formation in northern Yukon.

Minor coal is also known to exist in Mississippian map unit Mo. (Norris, 1982) in the Snake River area; in the Neocomian "coal-bearing division" (Jeletzky, 1961; Norris, 1981) in the northern Richardson Mountains; in the Upper Cretaceous Moose Channel Formation in the northernmost Yukon; and within Paleocene Reindeer Formation in the Mackenzie Delta area.

The Mississipian Mattson Formation, which hosts coal in the Northwest Territories, is known to occur in the southeastern Yukon, however no coal occurrences of any significance have been noted in the Yukon portion.

This report is accompanied by a 1:2 000 000-scale Yukon Coal Inventory map including coal occurrences for the Yukon Territory.

Organization: Government of Yukon | Gouvernement du Yukon
Airborne Geophysical Survey, Stewart River, Yukon Territory (Parts of 115N, O and 116B)

Results of multi-sensor (gamma ray spectrometer, magnetometer) contracted, helicopter surveys flown July-September, 2000 (phase 1) and July-September, 2001 (phase 2) are available in a variety of digital and printed formats. This is a joint release from the Geological Survey of Canada (GSC) and the Yukon Exploration and Geological Services Division (EGSD). Flight lines were positioned
every 500 m. The survey was funded by the Geological Survey of Canada through the Targeted Geoscience Initiative.

GSC Open File 4311, EGSD 2002-17D contains 120 digital images (in PDF format):
	 10 1:250,000 maps
and
	110 1:50,000 maps

for 10 variables.

Organization: Government of Yukon | Gouvernement du Yukon
The Sunnydale landslide, current understanding and research, Dawson (NTS 116B/3)

The Sunnydale landslide is a slow-moving rock-slope deformation on the western bank of the Yukon River directly across from Dawson, Yukon. While recent data suggest acceleration of the slide, which could pose a potential hazard to Dawson if the acceleration continues to the point of rapid failure, limited data precludes certainty on probability and timing of this occurrence. Field mapping allowed for documentation of road subsidence, expanding tension cracks, recent and ongoing rockfall and production of detailed geomorphological and surficial geology maps of the slide. Differencing from 2014, 2018, 2019, 2020 and 2022 aerial lidar data, and data from physical monitoring stations indicate current movement rates of up to 11 cm/yr across the slide area. Ongoing work including terrestrial lidar change analysis and installation of a near-real-time monitoring system in early 2023 will increase our understanding of current movement trends. Additionally, in-progress geologic dating of deformation features will further our understanding of the history and context of this feature on a geologic timescale.

Organization: Government of Yukon | Gouvernement du Yukon
2005–06 Supplementary estimates no. 3

Supplementary estimates no. 3 for the Government of Yukon 2005–06 Budget. 
This document was prepared by the Department of Finance under the direction of Management Board for the 1st Session of the 31st Legislature, Yukon Legislative Assembly. November 2006, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Geology and mineralization on the Dromedary property, central Yukon

The Dromedary property consists of 344 claims on Dromedary Mountain, Kalzas Mountain, and the intervening Macmillan River valley, all immediately northeast of Tintina Trench and 240 km northeast of Whitehorse. The property lies within Selwyn Basin geological terrane, and the following rock units are present: Proterozoic-Cambrian Hyland Group, Kechika phyllite and limestone, minor Road River shale and siltstone, Earn Group conglomerate, limestone, black silty shale and baritic chert, and overlying Permian shelf sediments. South Fork subvolcanic intrusions and Cretaceous granitic plugs have induced local biotite and calc-silicate hornfels and skarn.

The area was staked by Anaconda in 1980 and four areas of interest identified: Dromedary Creek, Dromedary Mountain, François and Kal-Cave. Blackstone Resources Inc. optioned the property in 1996 and has drilled the Dromedary Creek and François areas, encountering massive sulphide mineralization in all five holes. Economic grade Pb-Zn and massive pyrrhotite with significant gold occur on the François grid.

In 1997 the magnetic signature of the pyrrhotite on the François grid was traced 5 km, and soil anomalies were detected further to the west. In the Kal-Cave area a 7.5 km long lead-zinc soil anomaly was refined and numerous new occurrences of iron-sulphide mineralization, carbonate porphyroblasts, manganese and iron oxide were detected. Best samples from this area contain 5.53% Pb and 5.83% Zn.

Organization: Government of Yukon | Gouvernement du Yukon
Canyon property, southeastern Yukon

Galena and pyrrhotite occur in manganese-stained quartz-carbonate breccia beneath rusty limestone. Surface geology of the area suggests that the mineralization is a replacement of brecciated limestone in the footwall of a low-angle fault. Results from previous exploration have proved disappointing but the host structure is probably regional in extent and larger deposits may exist along strike.

Organization: Government of Yukon | Gouvernement du Yukon
2001–02 Supplementary estimates no. 1

Supplementary estimates no. 1 for the Government of Yukon 2001–02 Budget. 
This document was prepared by the Department of Finance under the direction of Management Board for the 2nd Session of the 30th Legislature, Yukon Legislative Assembly. October 2001, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
High-level terraces, Indian River valley, Yukon

High-level terraces in the Indian River valley, between the confluences of Ruby Creek and Dominion Creek with Indian River, are underlain by a sand-dominated fill. The fill formed when meltwater torrents from the margin of a Late Pliocene ice sheet drained into the Indian River valley from the divide with the Stewart River basin. A lake or lakes existed in the Indian River valley at that time. Mechanisms for ponding of the lake(s) include regional glacial damming of the ancestral Yukon drainage (Glacial Lake Yukon), or local damming by alluvial fans or landslides. Sufficient evidence does not exist to effectively eliminate any of these hypotheses. Placer gravel may exist below the sandy fill in a buried segment of the pre-glacial Indian River valley near the confluence of Montana Creek.

Organization: Government of Yukon | Gouvernement du Yukon
So you want to go mining in the Yukon, eh?

Many people who want to get started placer mining in the Yukon have questions about many things including cost, types of equipment, government regulations, and of course, "Where is the gold?". The capital cost of equipment may be the determining factor and will vary according to the size of the operation. Research and geology are important, and drill results can prove valuable. Access, whether via river, winter road, air or all-season road is an important consideration. It is also crucial to have the right equipment for the job of mining and washing the gravel. Finally, being able to meet the effluent standards for water use is a vital consideration for an ongoing, successful mining operation.

Organization: Government of Yukon | Gouvernement du Yukon
Bedrock Geology, Dorsey Lake (NTS 105B/4), southern Yukon (1:50,000 scale)

The layered rocks in this area originated as continental shelf sediments overlain by volcanic arc successions. Now called Yukon-Tanana terrane, they tectonically over-rode the western edge of ancient North America beginning in Middle Jurassic time.
Three elements are present in the map area. The west half comprises the Big Salmon Complex; the east half is a separate, in part contemporaneous succession composed of the Dorsey Complex and Swift River Group. Unconformably overlying both these elements are less metamorphosed Klinkit Group and Triassic sediments that are here interpreted as overlap assemblages. The unexposed contact between Big Salmon Complex and Swift River Group is inferred to be an east-side-down normal fault.

Organization: Government of Yukon | Gouvernement du Yukon
Regional stream sediment geochemical data, Watson Lake area, southeastern Yukon (NTS 095D & 105A)

NGR surveys were originally conducted in the Watson Lake map area in 1995. Stream sediment and water samples were collected from a total of 1117 sample sites. A total of 824 original samples were selected for reanalysis. Representative 2 gram splits were successfully recovered from 824 samples. Samples were analysed by an ultra-trace aqua-regia digestion ICP-MS package for 53 elements.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 116H

Reprocessing of magnetic data for Yukon was performed between November 2016 and March 2017. Aeromagnetic data were compiled, data of different resolutions were merged, and a series of images individually levelled for each map sheet were produced. For each 250k-scale map, the following magnetic derivative maps were produced: 1. Residual Total Magnetic Field; 2. Reduced-to-Pole Magnetic Field (RTP); 3. First Vertical Derivative of the Reduced-to-Pole Magnetic Field (RTP_VD); and 4. Tilt Derivative of the Reduced-to-Pole Magnetic Field (RTP_TDR). These maps are provided as pdfs, geotiffs and Geosoft grid files. Colour ramps/legends are provided for each map.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 115G

Reprocessing of magnetic data for Yukon was performed between November 2016 and March 2017. Aeromagnetic data were compiled, data of different resolutions were merged, and a series of images individually levelled for each map sheet were produced. For each 250k-scale map, the following magnetic derivative maps were produced: 1. Residual Total Magnetic Field; 2. Reduced-to-Pole Magnetic Field (RTP); 3. First Vertical Derivative of the Reduced-to-Pole Magnetic Field (RTP_VD); and 4. Tilt Derivative of the Reduced-to-Pole Magnetic Field (RTP_TDR). These maps are provided as pdfs, geotiffs and Geosoft grid files. Colour ramps/legends are provided for each map.

Organization: Government of Yukon | Gouvernement du Yukon
First vertical derivative of the magnetic field, Northern Stevenson Ridge Aeromagnetic Survey, NTS 115J/15 and 115J/16, Yukon

This map of the first vertical derivative of the magnetic field was derived from data acquired during an aeromagnetic survey carried out by Goldak Airborne Surveys during the period of May 16 to July 1, 2009. The data were recorded using a split-beam cesium vapour magnetometer mounted in the tail boom of a Piper Navajo aircraft. The nominal traverse and control line spacings were 400 m and 2400 m, respectively, and the aircraft flew at a nominal terrain clearance of 150 m.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 115P

Aurora Geosciences Ltd was contracted to perform a review of publicly available digital magnetic geophysical data submitted with assessment reports to develop standardized products and compilations. Data submitted prior to March 2015 were considered.

Individual assessment report data were levelled and integrated with 1:250 000 compilations.

Four gridded PDFs have been produced (residual total magnetic field, reduced to pole, vertical derivative and tilt derivative). Original 250k geophysical data can be found in YGS Open File 2017-43.

Organization: Government of Yukon | Gouvernement du Yukon
Residual total magnetic field, Kluane area aeromagnetic survey, Parts of NTS 115 G/8, 115 H/5 and 115 H/6, Yukon

This map of the residual total magnetic field was derived from data acquired during a helicopter-borne aeromagnetic survey carried out by Fugro Airborne Surveys during the period between February 4 to March 15, 2010. The data were recorded using split-beam cesium vapour magnetometers (sensitivity = 0.005 nT) rigidly mounted on each of the two Astar 350B aircraft (C-FGSC and C-GAVO). The nominal traverse and control line spacings were, respectively, 400 m and 2 400 m, and the aircraft flew at a nominal terrain clearance of 100 m. Traverse lines were oriented N30°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.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 105H

Aurora Geosciences Ltd was contracted to perform a review of publicly available digital magnetic geophysical data submitted with assessment reports to develop standardized products and compilations. Data submitted prior to March 2015 were considered.

Individual assessment report data were levelled and integrated with 1:250 000 compilations.

Four gridded PDFs have been produced (residual total magnetic field, reduced to pole, vertical derivative and tilt derivative). Original 250k geophysical data can be found in YGS Open File 2017-16.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 116F

Reprocessing of magnetic data for Yukon was performed between November 2016 and March 2017. Aeromagnetic data were compiled, data of different resolutions were merged, and a series of images individually levelled for each map sheet were produced. For each 250k-scale map, the following magnetic derivative maps were produced: 1. Residual Total Magnetic Field; 2. Reduced-to-Pole Magnetic Field (RTP); 3. First Vertical Derivative of the Reduced-to-Pole Magnetic Field (RTP_VD); and 4. Tilt Derivative of the Reduced-to-Pole Magnetic Field (RTP_TDR). These maps are provided as pdfs, geotiffs and Geosoft grid files. Colour ramps/legends are provided for each map.

Organization: Government of Yukon | Gouvernement du Yukon
Residual total magnetic field, Aeromagnetic Survey of the Nisling River Area, NTS 115 I/4 and 115 J/1, Yukon

This high sensitivity aeromagnetic survey was carried out by Goldak Airborne Surveys (Goldak) on behalf of the Geological Survey of Canada (GSC) between January 25th and March 26th, 2011. Aircraft equipment operated included three cesium vapour magnetometers, a GPS real-time and post-corrected differential positioning system, a flight path recovery camera, VHS titling and recording system, as well as radar and barometric altimeters. All data were recorded digitally in GEDAS binary file format. Reference ground equipment included two GEM Systems GSM-19W Overhauser magnetometers and a Novatel 12 channel GPS base station which was set up at the base of operations for differential post-flight corrections.

Eighty two flights (including test and calibration sorties) were required to complete the survey block. A total of 37,999 line kilometres of high resolution magnetic data were collected, processed and plotted. The traverse lines were flown at a spacing of 400 m with control lines flown at a separation of 2400 m. Nominal terrain clearance was specified at 100 m above ground.

Organization: Government of Yukon | Gouvernement du Yukon
Surficial geology of greater Haines Junction area, Yukon; parts of NTS 115A/11, 12, 13 & 14, 1:15 000 scale.

Detailed surficial geology mapping (1:15 000 scale) was carried out from 2022-2024 for the area surrounding the Village of Haines Junction in southwestern Yukon, within the Traditional Territory of the Champagne and Aishihik First Nations. Mapping was based on desktop interpretations of high-resolution lidar, as well as air photo and satellite imagery. This was further supported by a variety of field investigations including analysis of stratigraphic sections and geotechnical drill logs.

The map portrays properties of surface sediments, including texture, genetic material, surface expression and stratigraphy. Geomorphological processes that presently modify surficial materials and/or did so in the past, are also identified. Some of these processes include geohazards such as landslides, permafrost thaw and flooding.

A variety of landforms which indicate the presence of permafrost are mapped, including pingos, thermokarst collapse ponds, lithalsas and retrogressive thaw flow landslides. Locations of recent permafrost investigations are also shown, including geophysical surveys and shallow boreholes drilled to establish permafrost-monitoring stations.

This work will ultimately support a variety of community activities, such as land use planning, archeological investigations, agricultural development, aggregate exploration, and infrastructure work. It also helps to better constrain the unique history of Neoglacial Lake Alsek, which inundated the area multiple times during recent advances of the Lowell Glacier across the Alsek River.

Organization: Government of Yukon | Gouvernement du Yukon
The geology and mineralogy of the Brown McDade Mine

The Brown McDade Mine is a gold-silver discovery in Yukon, halfway between Whitehorse and Dawson. It lies in the area unglaciated during the Pleistocene Period. Diamond drilling and stripping in 1946 indicated commercial values across a width of 10 feet and over a length of 1000 ft. The geologic structure is that of a Late Tertiary, dike-like body of quartz feldspar porphyry cutting quartz diorite of Jurassic or later age. This body has a Northwest strike and dips steeply west. The ore zone lies in the porphyry and is believed genetically related to it. The mineralization consists of a cherry-like fine grained blue quartz, with disseminated sulphides comprising less than 5% of the mass. Metallic minerals are pyrite, arsenopyrite, and sphalerite, with lesser amounts of galena, chalcopyrite, tetrahedrite, stibnite, bournonite, jamesonite and gold. The gold is associated with the pyrite in fine particles, the majority less than 150 microns in size. The gold-silver ratio is about one to ten. Sericitization and carbonatization are the chief forms of hydrothermal alteration, while considerable limonite, and around the ore zone, jarosite, have been produced by weathering. On the basis of comparisons with known deposits, the Brown McDade is considered to belong to the deeper epithermal type. It should continue to reasonable depths although the ore shoots are likely to be erratic. The area south of the main ore zone, underlain by schistose rocks will probably be unfavorable for the occurrence of ore.

A copy of this thesis is available at the EMR library – QE376.5.Y8 L35.
This thesis is available online at https://open.library.ubc.ca/cIRcle/collections/ubctheses/831/items/1.0053530.

Organization: Government of Yukon | Gouvernement du Yukon
Neoproterozoic and early Paleozoic correlations in the western Ogilvie Mountains, Yukon.

Continued investigations of sedimentary units in the Tatonduk and Coal Creek inliers of the western Ogilvie Mountains have resulted in a refinement of the regional Neoproterozoic and early Paleozoic stratigraphy. The proposed correlations simplify Yukon stratigraphic nomenclature and promote synthesis of geological data.

Strata of the Fifteenmile, Rapitan and Hay Creek groups, as well as the upper WindermereSupergroup are present in both inliers. Prominent unconformities within the Fifteenmile Group, and between the Windermere Supergroup and the variable overlying Paleozoic stratigraphy, represent at least three distinct tectonic events and basin-forming episodes. 

We propose redefinition of the Fifteenmile Group, abandonment of the Tindir Group, and recognition of strata equivalent to the Coates Lake Group and Mackenzie Mountains supergroup. This refined nomenclature across the Ogilvie, Wernecke and Mackenzie mountains is a step toward enhanced regional correlation of exposures in the northern Cordillera and Proterozoic inliers of the western Arctic.


Organization: Government of Yukon | Gouvernement du Yukon
Sampling problems and hydraulic factors related to the dispersion of scheelite in drainage sediments, Clea Property, Yukon Territory

Multifractional analysis for scheelite, magnetite, heavies, mediums, and lights, in drainage sediments downstream of the Clea tungsten-bearing skarn deposit, Yukon, revealed three interdependent problems that complicate interpretation of results of drainage surveys for W: (1) Scheelite concentrations in stream sediments reflect, in part, hydraulic sorting rather than source distribution. (2) Low numbers of scheelite grains in stream sediments cause high random sampling and subsampling errors and present analytical difficulties. (3) Scheelite/heavies or scheelite/mediums ratios may not be appreciably higher downstream of scheelite-bearing skarn than barren bedrock, because scheelite, heavies and mediums occur in increased amounts in skarns (i.e. they covary in source materials). Hydraulic effects result in systematic changes in mineral distributions between high and low energy environments (characterized by coarse gravel and fine gravel to sand, respectively). Scheelite, magnetite, heavies and mediums concentrations in -10-mesh sediments are greater in high energy environments, and this relative enrichment increases with grain size and density (up to one-hundredfold for scheelite). Using a regression method, developed in this study, hydraulically equivalent sizes of magnetite and heavies were empirically determined for finer (3.0-3.5 phi and 3.5-4.25 phi) scheelite sizes. Ratioing the weight of scheelite to that of a hydraulically equivalent mineral greatly reduces hydraulic variability. Resulting profiles of hydraulically equivalent scheelite concentrations more clearly delineate locations of scheelite input to the stream. The rare-grain problem can be reduced at the sampling level by sampling from high energy environments and/or by sampling for finer scheelite. Heavy mineral separation is the most effective means of reducing the rare grain problem at the subsampling and analytical levels. The problem of covariance in source materials can best be remedied by ratioing to an individual (hydraulically equivalent) heavy mineral which has a constant and ubiquitous distribution in the area of interest. In this study, magnetite shows promise, but more information on its source distribution is needed.

Organization: Government of Yukon | Gouvernement du Yukon