AndreaBozzo/ceres-open-data-index huggingface dataset:
Geochemistry and U-Pb zircon geochronology of mid-Cretaceous tay river suite intrusions in southeast Yukon

Reconnaissance geological mapping in the Coal River map area of southeastern Yukon investigated several small mid-Cretaceous plutons. The intrusions are composed of unfoliated or incipiently foliated, fine to coarse-grained, equigranular and porphyritic, biotite ± hornblende quartz monzodiorite to granodiorite. They are metaluminous to peraluminous and have reduced to oxidized geochemical characteristics. The composition of selected samples is consistent with magma formation from partial melting of infracrustal source rocks.U-Pb ages were obtained for nine plutons from five or six zircon single-grain analyses by the isotope dilution thermal ionization mass spectrometry method with chemical abrasion (CA-TIMS). All interpreted ages are concordant within statistical uncertainty. The plutons range in age from 99.80 ± 0.03 to 97.70 ± 0.03 Ma. Given the primarily unfoliated nature of the plutons, contractional, fabric-forming deformation within the Cordilleran orogeny must therefore have largely ceased at the present level of exposure in the Coal River area by the time of intrusion (ca. 98 Ma).The ages and compositions of the plutons in Coal River map area are consistent with their being part of the Tay River plutonic suite, a northwest-trending belt of coeval and compositionally similar plutons and local volcanic rocks (South Fork volcanic suite) that, when augmented by the addition of the Coal River plutons, extends approximately 465 km with a width of up to 150 km.

Organization: Government of Yukon | Gouvernement du Yukon
Aeromagnetic Total Field, Yukon Territory, NTS 106L/NE-NW

This map was compiled from data obtained as a result of an aeromagnetic survey carried out by Fugro Airborne Surveys using a Cessna Caravan aircraft. A 0.005 nT sensitivity split-beam cesium vapour magnetometer was mounted in the tail boom of the survey aircraft. 
The survey operations were carried out from March 7 to May1, 2003. The nominal traverse line spacing was 800 m with control lies at 2.4 km spacing at a nominal terrain clearance of 200 m. A preplanned flight surface was calculated for this survey to minimize the control line and traverse line altitude differences. Flight path was recovered using a post flight differential Global Positioning System, combined with a vertically mounted video camera.
After editing the survey data, the intersections of the control and traverse lines were established and differences in the magnetic values were computer analysed and manually checked to obtain the level network. The levelled total field values were then interpolated to a 200 m grid. The International Geomagnetic Reference Field has not been removed from the magnetic total field.

Organization: Government of Yukon | Gouvernement du Yukon
Comparative studies of cataclastic allochtonous rocks in McQuesten, Laberge and Finlayson Lake map-areas

The recent tectonic synthesis of central Yukon outlines the affinity of several groups of cataclastic rocks preserved mostly as allochthonous sheets. The subduction processes thought to have produced these rocks generated high pressure metamorphic mineral assemblages which, if preserved, can be used to correlate lithologies and explain their history. Detailed comparison of portions of the allochtonous sheets may thus contribute to exploration efforts.

Organization: Government of Yukon | Gouvernement du Yukon
Surficial Geology of Seagull Creek (parts of NTS 105F/10 and 7), Yukon (1:50,000 scale)

The Seagull Creek map area includes the upper two-thirds of the Seagull Creek drainage area. The creek rises at a high divide (1372 m) in the Pelly Mountains and flows south-southeast for approximately 30 km in a broad, U-shaped valley before joining the McConnell River (1067 m). The drainage area contains summits of up to 2162 m elevation with numerous cirques on north and east-facing aspects. The evidence of glaciation in this landscape is ubiquitous. Most high peaks have been eroded into knife-edge arêtes or horn peaks and cirque basins are currently occupied by active or extinct rock glaciers, tarn lakes, or glacial debris. Valley sides have been over-steepened by glacial erosion and are susceptible to mass movements.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Mineral Exploration Program 2019 update

Financing of Yukon exploration projects on equity markets was extremely challenging in 2019. This lack of investment had a trickle-down effect to many Yukon exploration projects. The exploration industry cited a number of factors as the cause of the decline in the attractiveness of Yukon for investment including permitting uncertainty, land withdrawals, and a general lack of infrastructure. Because of these challenges explorers showed considerable interest in the 2019 YMEP program as one of the few sources of risk capital. The YGS received 99 applications seeking more than $3.2M. Funding for the YMEP was $1.4M in 2019.

Organization: Government of Yukon | Gouvernement du Yukon
Mineral Industry Report 1975

This report is a review of the Yukon mineral industry for 1975 by the Geology Section, Northern Natural Resources and Environment Branch, Department of Indian and Northern Affairs. It includes descriptions of work conducted on mineral claims by individuals and mineral exploration companies and operating summaries of the several producing mines in the Yukon. It also contains technical papers on select properties.

Information in this report was obtained from visits to mineral properties, from personal communication with individuals and from technical reports, trade journals, newspapers, publications of the Geological Survey of Canada and the monthly reports of the District Mining Recorders. A list of assessment reports, both confidential and those available for inspection, is included in the list of Technical Reports.

In this report, activities of the mineral industry are divided into lode mining and exploration, coal mining and exploration and placer mining.

Organization: Government of Yukon | Gouvernement du Yukon
Sediment-hosted disseminated gold occurrence, northeast Mayo Lake area

Low to moderate levels of gold are widely distributed within a distinct member of the Mississippian Keno Hill Quartzite northeast of Mayo Lake, demonstrating characteristics of sediment-hosted disseminated gold deposits. Alteration is pervasively developed within a 20m-thick, moderately dipping quartzite interval that can be traced along strike for 4 km. The unit is distinct in texture and appearance due to the effects of hydrothermal alteration. The altered sandstone is highly porous due to secondary leaching (decalcification), producing a friable unit. Also striking is the bleached white appearance (decarbonatization), which contrasts with the dark grey to black of unaltered graphitic quartzite. Sericite and illite are widespread secondary products of the alteration, and trace amounts of pyrite have been largely oxidized into rusty streaks. Abundant, regular, steep, northeast-striking, vuggy quartz veins are stratabound to the porous interval along its entire length - likely resulting from in-situ hydrofracturing due to elevated pore fluid pressure.

Organization: Government of Yukon | Gouvernement du Yukon
Surficial Geology Map and Till Geochemistry of Mt. Mye and Faro (105K/3 E & 6 E), central Yukon

Surficial geological map (1:25 000 scale) and till geochemistry (copper, lead and zinc) of Mount Mye and Faro area, central Yukon (NTS 105K/3 and 6 east).

Organization: Government of Yukon | Gouvernement du Yukon
2012–13 Supplementary estimates no. 2

Supplementary estimates no. 2 for the Government of Yukon 2012–13 Budget. 
This document was prepared by the Department of Finance under the direction of Management Board for the 1st Session of the 33rd Legislature, Yukon Legislative Assembly. March 2013, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
2008–09 Supplementary estimates no. 3

Supplementary estimates no. 3 for the Government of Yukon 2008–09 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. October 2009, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Placer gold settings within an alpine glaciated environment, Granite Creek, Yukon (NTS 105M/14)

Alpine glaciers from cirques of Granite and Albert creeks have deformed and reworked sediments in the Granite Creek valley and deposited locally sourced gold. Placer mining operations in the valley allowed detailed study of sedimentary deposits. The main units identified are from at least two glacial episodes which advanced farther than the previously mapped limits. Thick sequences of advance and retreat outwash blanket the till and represent high energy depositional environments. At least one proglacial lake formed due to ice-damming of lower Granite Creek by the Cordilleran Ice Sheet. We provide a stratigraphic record extending approximately 130 000 years and have correlated alpine till units to MIS 4, which has not been identified elsewhere in central Yukon. Multiple gold-bearing sedimentary units are found in the stratigraphy, representing glacial, interglacial/interstadial, and modern processes. This work highlights processes important to gold concentration that can be applied to other alpine glaciated areas with proximal gold mineralization.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Geological Survey’s Outreach Program: 2021 highlights

Geoscience, which is the study of Earth systems, is complex and highly dynamic. It examines the interactions between the lithosphere, hydrosphere, biosphere and atmosphere – all of which are critical to sustaining our planet (AGI, 2012). The Yukon Geological Survey’s mandate is to provide objective geological information to Yukon government, Yukon First Nations and the general public. This information underpins geoscience-related policy and investment decisions in the territory, and adds value to Yukon’s geoscience knowledge base. With a staff of more than 15 geoscientists, the Yukon Geological Survey (YGS) conducts a wide variety activities from traditional bedrock and surficial mapping, to focused studies such as community hazards mapping (e.g., monitoring landslides and thawing permafrost), and mineral assessments, among others. As a government organization, it is our duty to not only engage with First Nations and other governments, but to also educate all citizens of the Yukon about the importance of geoscience in order to help society find and manage our natural resources for the present and future (Geoscientists Canada, 2018).
YGS recognizes the importance of having a geoscientist on staff who is dedicated to outreach and education. Communicating geoscience effectively, and educating Yukoners on how Earth systems work will help them to make informed judgements that affect our territory, as well as our planet (AGI, 2011). Despite the ongoing pandemic, YGS remained very active in public outreach and education; this paper provides a summary of activities for 2021.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary geology of Rose Mountain, Anvil District, central Yukon (105 K/5)

A 2000 m thick succession of six metasedimentary and metavolcanic units ranging in age from Ordovician through Permian strikes northwest and dips moderately to the southwest in the Rose Mountain area (105K/05). Units 3-6 have conformable contacts exposed and form a continuous succession. Units 1, 2 and 4 are correlated with lower to middle Paleozoic regional stratigraphic units of ancestral North America. Unit 3 consists of pale green argillite with lesser chert pebble conglomerate, sandstone and shale chip breccia interbeds, and is unique to the Rose Mountain area. Unit 5 is bedded chert and is correlated with North American Mount Christie formation. Unit 5 is also similar to chert units in Slide Mountain Terrane. Unit 6 correlates with basalts of the Slide Mountain Terrane.

Unit 4 is correlated with Earn Group and contains two stratiform barite horizons. No sulphides are visibly associated with the barite, but the unit is favourable for stratiform base metal mineralization.

All units contain one major deformation fabric. This contrasts with structural style immediately to the northeast where two major deformation fabrics occur. The Rose Mountain fabric is correlated with the older deformation fabric present to the northeast.

Organization: Government of Yukon | Gouvernement du Yukon
Report on a Quantec Titan-24 geophysical survey over the Minto Mine, central Yukon

The following report by Quantec Geosciences Ltd. presents the results of a Titan-24 geophysical survey that was co-funded by Capstone Mining Corp. and the Yukon Geological Survey. Titan-24 is a geophysical exploration method combining DC resistivity/IP chargeability and magnetotellurics; a pole-dipole geometry with 100 m station spacing was used in this survey.

Organization: Government of Yukon | Gouvernement du Yukon
Inventory of mass movement geohazards along the Dempster Highway, Yukon

This report provides comprehensive documentation of landslide, permafrost subsidence and fluvial erosion-related geohazards for the Yukon portion of the Dempster Highway. It provides Yukon Department of Highways and Public Works – Transportation Engineering Branch a practical geohazard inventory that will help guide planning and mitigate future risk to the highway. It also becomes a valuable reference pertaining to slope stability, permafrost and fluvial processes in northern Yukon.
Results from this study identified 54 mass movement geohazards and 102 meander-highway encroachment sites with the potential for future highway impact. Of particular significance, 75% of the mapped mass movement geohazards are influenced by permafrost or degrading permafrost, an important geological attribute considering future temperatures are expected to increase.

Organization: Government of Yukon | Gouvernement du Yukon
Finlayson Lake Targeted Geoscience Initiative (southeastern Yukon), Part 1: Bedrock geology

The Finlayson Lake Targeted Geoscience Initiative, conducted jointly by the Geological Survey of Canada and Yukon Geology Program, comprised new geological mapping and till geochemistry in the northern two-thirds of Finlayson Lake map area, in and around the Finlayson Lake massive sulphide district. The goals of the initiative were to document the nature of Yukon-Tanana Terrane in this area, and, as bedrock exposures are sparse, to use till geochemistry to remotely sense new exploration targets.

The new mapping illustrates that much of the area south of the Robert Campbell Highway is underlain by the rock units that host the Fyre Lake, Kudz Ze Kayah and GP4F deposits. These rocks are thrust northwardly over a succession of carbonaceous clastic rocks, chert and felsic meta-volcanic rocks, with potential for syngenetic deposits. The Permian Campbell Range basalt, host of the Ice deposit, unconformably overlies both sequences, and all of these rocks are thrust onto rocks of the North American miogeocline.

Organization: Government of Yukon | Gouvernement du Yukon
Total field magnetic, Wernecke Mountain Aeromagnetic Survey, NTS 106C (north half), 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
Yukon Minerals Industry Bibliography

This first edition of the Yukon Minerals Industry Bibliography consists of 2,741 bibliographic references of published and unpublished data relevant to the Minerals Industry of the Yukon. These references are the basis of a comprehensive bibliographic database that will be added to and updated as required. The references were compiled digitally, by computer modem, or at their source, and manually at their source. The references have been entered into Pro-Cite, version 1.4 software.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary stratigraphy and distribution of Devono-Mississippian massive sulphide-bearing volcanic rocks in the Mount Vermilion (Wolf) area, Pelly Mountains (105 G/5 and G/6), southeast Yukon

The Mount Vermilion area is located at the southeast end of the Pelly Mountains volcanic belt, about 90 km southeast of Ross River, and includes the Wolf volcanogenic massive sulphide deposit. This well exposed area was mapped at a scale of 1:25 000; several stratigraphic sections were measured across the belt. Results from this study show that the southeast end of the belt is made up of dominantly felsic volcaniclastic strata. The base of the succession consists of dominantly brown-pink lapilli tuff interbedded with argillite and lesser trachyte sills/dikes. The middle of the succession is made up primarily of heterolithic lapilli tuff with distinct argillite clasts, maroon matrix tuff with green lapilli-sized fragments and trachyte flows/sills/dikes; the upper part consists of chlorite-altered volcaniclastic rocks containing intermediate dykes and flows. The Wolf deposit is hosted within the middle portion of the volcanic succession proximal to a syenite intrusion.

To the west, towards the centre of the volcanic belt the felsic volcaniclastic component decreases as the number of sills, flows and dikes becomes more numerous, and the amount of intermediate volcanic material increases.

Organization: Government of Yukon | Gouvernement du Yukon
What’s the Yukon Territory made of? Earth materials portrayed on a geological highway map

The Yukon Geological Survey (YGS), in collaboration with the Geological Survey of Canada (GSC), is preparing a geological highway map (1:2 000 000 scale) of the territory with a shaded relief base. Unlike a regular geological map whose legend shows rock formations in chronological order, this map emphasizes earth materials — nine rock types and six kinds of unconsolidated deposits — with less regard for their age. This map also shows major faults, hot springs, the location of other geological features of interest to the public, as well as primary and secondary road networks, communities and parks.
The geological highway map is accompanied by a series of illustrated time-slices of the tectonic evolution and glacial history of the territory. It is intended to be a territory-wide synthesis of Yukon’s geology — for residents as well as the rubber-tired tourist.

Organization: Government of Yukon | Gouvernement du Yukon
Shaded Magnetic First Vertical Derivative, Yukon Territory, NTS 106F/NE-NW

This map was compiled from data obtained as a result of an aeromagnetic survey carried out by Fugro Airborne Surveys using a Cessna Caravan aircraft. A 0.005 nT sensitivity split-beam cesium vapour magnetometer was mounted in the tail boom of the survey aircraft. 
The survey operations were carried out from March 7 to May1, 2003. The nominal traverse line spacing was 800 m with control lies at 2.4 km spacing at a nominal terrain clearance of 200 m. A preplanned flight surface was calculated for this survey to minimize the control line and traverse line altitude differences. Flight path was recovered using a post flight differential Global Positioning System, combined with a vertically mounted video camera.
After editing the survey data, the intersections of the control and traverse lines were established and differences in the magnetic values were computer analysed and manually checked to obtain the level network. The levelled total field values were then interpolated to a 200 m grid. The International Geomagnetic Reference Field has not been removed from the magnetic total field.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Geological Survey 2024 overview

The Yukon Geological Survey (YGS) has seen significant change over the last year, with eight new staff joining the team in 2024. This change has brought some new energy to the survey, enabling more visits to exploration projects and building the organization’s capacity to deliver geoscience.

This report provides a snapshot of YGS’ staff and fiscal resources, and summarizes YGS’ 2024 activities and project highlights.
Over the course of the year, YGS organized three workshops to assess current gaps in map coverage, seek input from clients about their needs, and consider how current trends such as interest in critical minerals and increasing frequency of landslides might influence YGS’ priorities in the future. Following each workshop, a list of project ideas for future work was compiled; these are summarized in this report.

Gold prices in 2024 were high, averaging over C$3351 per ounce during the production season. This was a major driver for placer activity in the Yukon, which recorded the highest production on record since 1886.

On a more somber note, the failure of the heap leach pad at Eagle Gold Mine in late June had a significantly negative impact on the First Nation of Na-Cho Nyäk Dun and the mineral industry in general. The medium to long-term effects of this incident on the environment and the mining sector are currently unclear.

Organization: Government of Yukon | Gouvernement du Yukon
Peliminary observations on the geology of the Anvil Lake area (parts of NTS 105K/11 and 12), central Yukon

The Anvil Lake area consists of mostly contact-metamorphosed siltstone and sandstone having lesser interbedded volcanic and carbonate units that belong to the Early Paleozoic Selwyn basin, thrust northward over the Devono-Mississippian Earn Group and Carboniferous to Triassic formations. These are intruded by the mid-Cretaceous Anvil batholith. The mapped area surrounds the Keg, a disseminated silver-base metal deposit of current interest; new bedrock information will increase the efficiency of exploration of silver bearing veins noted along stratigraphic and structural contacts regionally. It is the first season of an investigation aiming to provide more detailed revision of regional maps, with further paleontology, geochronology, and structural analysis.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon critical minerals inventory 2021

This report is intended as a general reference document on Yukon’s critical mineral endowment and potential. It provides some background on critical minerals, and for clarity it includes a number of definitions, as the terms used to describe these commodities are somewhat fluid. The document also provides a snapshot of Canada’s (and Yukon’s) position as a supplier of critical minerals and highlights potential opportunities for Yukon. The bulk of the report, presented in Part 2, consists of a series of critical mineral data sheets, describing each of the critical minerals that are on Canada’s list. The data sheets provide some basic facts about each commodity, as well as information on Yukon’s endowment of each critical mineral.

Organization: Government of Yukon | Gouvernement du Yukon