AndreaBozzo/ceres-open-data-index huggingface dataset:
Examination of Revegetation Methodologies for Dry Stack Tailings in Northern Environments

Considerable research has been carried out into the reclamation and revegetation of disturbed lands in the Yukon, including operating and abandoned mines, and mineral exploration sites in the Yukon. Reclamation efforts on tailings have focused on methods to establish an initial vegetative cover on disturbed areas. Guidelines have been established by Kennedy (1993) and Hill et al. (1996) for the optimum mixtures of fertilizer and seeds (both agronomic and native varieties)¿.
¿.A relatively new and unique method of tailings processing and disposal that is being used at a few mines around the world is called dry stacking. This method of tailings disposal has the potential to provide many benefits to mining companies and affords numerous environment advantages that slurry deposits do not¿.
¿.The purpose of this proposed project was to research current practices in other jurisdictions and to examine the best approaches for encouraging vegetative establishment on dry stack tailings in norhtern environments, particularly for potential mine sites in the Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Placer Mining

A brief report on placer mining that provides background information to those readers with little or no knowledge of placer mining. Some of the topics discussed in this report are as follows:
- What is placer mining?
- Characteristics of gold
- Placer deposits:: where are they found?
- Operations:: medium and large
- Permafrost
- Buying and selling gold
- Rules and regulations
- Use of land and trees
- Water use regulations
- Fineness of Yukon placer gold
- Staking guide
- Excerpts from the Yukon Placer Mining Act

Organization: Government of Yukon | Gouvernement du Yukon
Monitoring of Low Permeability Cover Performance, Arctic Gold and Silver Mine Site, Carcross, Yukon

The production of acid rock drainage (ARD) from mine tailings is a significant environmental concern at various abandoned mine sites in Yukon. Leachate with low pH and high dissolved metals concentrations deriving from mine tailings impoundment areas can negatively impact various groundwater and surface water resources.

The presence of both oxygen and water is required for ARD to develop. Therefore, the reduction of the oxygen source and the water source from the mine tailings through the use of a low permeability cover (which acts as an oxygen/infiltration barrier) will limit ARD production. This is the basis of the design and recent reclamation (1998-99) of the Arctic Gold and Silver Tailings Site in Carcross, Yukon that EBA has been involved with in association with PWGSC.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Exploration and Geology 2004

The 2004 volume has four parts. The first part - Mineral Industry - includes overviews of hardrock and placer mining and exploration in the territory. The second part - Government - outlines the activities and organization of the Yukon Geological Survey, and includes announcements of the sixth Mining Land Use Reclamation Awards, the Robert E. Leckie Awards. The third part - Geological Fieldwork - contains reports describing regional mapping, and more detailed geoscience studies. The last part - Property Descriptions - is a collection of geological reports of mineral occurrences with recent exploration advances or detailed studies. This year they are authored by two university students.

Organization: Government of Yukon | Gouvernement du Yukon
Biogeochemical prospecting in the Yukon-Tanana Terrane, Yukon Territory

Restoration of the 450 km of right lateral movement on the Tintina Fault brings the massive sulphide-rich Finlayson area of the Yukon-Tanana Terrane to a location southeast of Dawson. This suggests that the underlying Yukon-Tanana Terrane geology west of the Tintina Fault, in west-central Yukon is prospective for massive sulphide mineralization. This area, west of the Tintina fault, largely escaped Pleistocene glaciation and is deeply weathered and covered by a thick mantle of soil and vegetation. This presents problems for traditional geochemical prospecting using soil samples. Alternatively the vegetative cover can be used as a sampling medium.

To test the effectiveness of this technique in the exploration for VMS deposits two areas of the Yukon-Tanana Terrane were chosen for study:: Matson Creek and Bradens Canyon. At Matson Creek, a biogeochemical signature was obtained from a site with known polymetallic sulphides and data compared with known soil geochemistry. At Bradens Canyon soil and biogeochemical samples were collected. At each sample site in the two locations twigs were collected from both black and white spruce trees according to availability, along several transects. Results indicate that biogeochemical sampling is a viable alternative to soil sampling. The data show that the two species of spruce contain different concentrations of elements, therefore care must be taken during the sampling procedure to identify which species is being sampled. From the data a normalization factor was created by multiplying the white spruce Cu and Pb values by a factor of two in order to obtain an approximate equivalent concentration of these elements in black spruce.

Organization: Government of Yukon | Gouvernement du Yukon
Variations in the depth and thickness of the White River Ash in lakes of the southwest Yukon

The purpose of this study is to document the depth and thickness of the White River Ash in lakes across the southwest Yukon for use in paleoenvironmental impact studies. Sediment cores were sampled from seven lakes located within the plume of the eastern lobe of the White River Ash (1147 cal. years BP). Site locations are between 92 and 254 km from Mount Churchill, Alaska, the probable source for the White River Ash. Based on magnetic susceptibility measurements, the depth of the sediment above the ash layer in the lakes ranges between 38 and 98 cm; these differences are due to factors associated with sedimentation rates. The thickness of the ash ranges between 0.1 and 32 cm and typically increases with proximity to the source vent. These results can be used in paleoenvironmental studies to assist in the interpretation of the impact of volcanic ash events.

Organization: Government of Yukon | Gouvernement du Yukon
Surficial Geology of Dublin Gulch Map Area, Central Yukon (106D/4)

Surficial geological map (1:50,000 scale) of Dublin Gulch area, central Yukon (NTS 106D/4) including marginal notes on physiography, glacial history, placer gold potential and terrain hazards. Also included are 5 generalized stratigraphic sections.

Organization: Government of Yukon | Gouvernement du Yukon
Geophysical and borehole investigation of aggregate resources in the Whitehorse area, Yukon

Aggregate is an integral resource for the development of Whitehorse. The City of Whitehorse receives much of its gravel from private quarries located within city limits; this benefits the city by reducing the transportation costs associated with hauling aggregate from outside of the city. Anticipated growth and development places an increased demand on locally sourced aggregate required for construction. While new quarries are vital for growth, it is important that resource extraction be maximized near existing quarries in order to take advantage of existing infrastructure. The goal of this project is to gain a better estimate of the quality and quantity of aggregate at four sites in the vicinity of Whitehorse.

Four locations in the Whitehorse area were investigated for their aggregate potential: 1) McLean Lake, 60°38’20.62”N 135°04’06.75” W; 2) km 196 North Klondike Highway (Takhini Bridge); 3) Haekle Hill/Alaska Highway (60°48’17.77N 135°13’36.95”W, 761 m asl); and 4) Long Lake (road site 60°45’26.19N 135°02’34.42”W, 723 m asl).

Organization: Government of Yukon | Gouvernement du Yukon
2004–05 Supplementary estimates no. 3

Supplementary estimates no. 3 for the Government of Yukon 2004–05 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. October 2005, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Bimodal Paleogene volcanics near Tintina fault, east-central Yukon, and their possible relationship to placer gold (GSC Project No. 800001)

A bimodal volcanic suite of rhyolite intrusions and flows and columnar olivine basalt, basaltic tuff and tuff breccia occurs along and immediately north of the Tintina Fault from near Faro to Tuchitua in east-central Yukon. The results of recent fieldwork and geochronometry over the northern part of this belt expands the known areal distribution of rhyolitic volcanics and confirms their age as late Paleocene to Eocene. Basalt formerly thought Quaternary is also of Eocene age. The concordance of dates between the mafic and felsic volcanics indicates a single Paleogene bimodal volcanic province. Such bimodal suites are commonly linked to crustal extension and normal faulting, which in this case are presumably related to transcurrent slip along Tintina Fault.

The connection between Paleogene volcanism and the geographical extent of placer gold in this area is more than circumstantial. The recent lode gold discovery at Grew Creek appears to be intimately associated with Paleogene felsic volcanism. Hydrothermal systems associated with similar felsic volcanic centres elsewhere in the region, perhaps unmapped or buried by drift, may be the ultimate source of the placer gold.

Organization: Government of Yukon | Gouvernement du Yukon
Clean Energy Act reports

Resources and technical information related to climate change, energy and the green economy in the Yukon.

Published under the [Clean Energy Act](https://laws.yukon.ca/cms/images/LEGISLATION/PRINCIPAL/2022/2022-0014/2022-0014.pdf).

[Access additional Yukon climate change information](https://yukon.ca/en/science-and-natural-resources/research-and-monitoring/access-yukon-climate-change-information).

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary geology of the Thirty-Seven Mile Creek map sheet (105 D/13)

Thirty-Seven Mile Creek map area, northwest of Whitehorse, straddles the contact between Coast Plutonic Complex and rocks attributed to northern Stikine Terrane. Late Triassic Little River granodiorite and Late Paleocene (57 Ma) Annie Ned granite underlie the western part of the map area. Upper Triassic to Middle Jurassic volcanic and sedimentary rocks of the Lewes River and Laberge groups underlie the eastern part of the map. The contact between Coast Plutonic Complex and Stikine Terrane is marked by the Takhini deformation zone - a region of greenschist, gneiss, mylonite, and amphibolite whose protolith is volcanic rocks of Lewes River Group. Potential mineral deposits in this map area include epithermal and mesothermal quartz veins, and magnetite skarns.

Organization: Government of Yukon | Gouvernement du Yukon
Field, kinetic, and thermodynamic studies of magmatic assimilation in the Northern Cordilleran volcanic province, northwestern British Columbia

A copy of this thesis is available at the EMR library – QE461.B7.E39 1997.
This thesis is available online at https://open.library.ubc.ca/cIRcle/collections/ubctheses/831/items/1.0052728.

Organization: Government of Yukon | Gouvernement du Yukon
Roadside Geology of the Dempster Highway, Northwest Territories and Yukon, A traveler’s guide to the Geology of Canada’s most northwestern road

This guidebook describes the rocks and landforms along the Dempster Highway. The southern terminus of the highway is located near Dawson City in west-central Yukon. A drive along the Dempster Highway takes you from its junction with the South Klondike Highway (Hwy 2), 717 km northeastward to Inuvik, Northwest Territories. On road maps this is Highway 8 in Northwest Territories, and Highway 5 in Yukon. 

The Dempster Highway traverses diverse geological features and many contrasting landscapes. It passes rocks created hundreds of millions of years ago, mountain ranges with a complex history of continental collision, hints of the energy resources at depth, and evidence of recent glaciations.

The guide is an update and expansion of a guide produced for a fieldtrip sponsored by the Canadian Society of Petroleum Geologists. It also incorporates information from a guide by Tarnocai et al. (1993) and observations of the contributors in 2005 and 2006. In this guidebook you will find an introduction to the general bedrock geology, glacial history and mineral resources of the area, followed by a road log, and a glossary explaining geological terms.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Placer Mining Industry 1998-2002

This report documents the placer mining industry in the Yukon from 1998 to 2002. The information is presented in three sections. The first section contains an overall view of staking activity, placer gold production and a breakdown of gold produced by creek. The second section comprises a collection of general interest and historical articles, including a new segment describing the first Yukon placer mining reclamation award. The Robert E. Leckie Award for Outstanding Reclamation Practices was created in honour of Mayo Mining Inspector, Bob Leckie, who passed away in 1999. Details of the award and each year's winners are in this section. The third section of the report contains detailed descriptions, locations and, in many cases, photographs of various placer mining operations visited by the Mining Inspection Division of the Mineral Resource Directorate during the course of duty.

Organization: Government of Yukon | Gouvernement du Yukon
Nature of the Robert Service Thrust on Fork Plateau and implications for mineral exploration, Mayo map area

Revision geological mapping has shown that the Robert Service Thrust is imbricated and isoclinally folded in Mayo map area. On Fork Plateau, highly deformed Keno Hill quartzite and meta-diorite that occur above the hanging wall Hyland Group are inferred to be antiformal windows resulting from folding of the fault surface. The occurrence of vuggy meta-diorite on Fork Plateau, geochemically anomalous headwater creeks and placer mining downstream, indicates that the Fork Plateau may warrant further exploration.

Organization: Government of Yukon | Gouvernement du Yukon
A note on preliminary lithogeochemistry of the Fire Lake area

The Fyre Lake volcanic-hosted massive sulphide (VMS) deposit is located about 160 km northwest of Watson Lake in the Finlayson Lake district of southeastern Yukon. The deposit is hosted by Devonian (?) and Mississippian rocks of the Yukon-Tanana Terrane and occurs close to the contact between chlorite schist and overlying carbonaceous phyllite. Copper-cobalt-gold mineralization occurs in two parallel zones: West Kona and East Kona.

The chemical composition and rare earth element (REE) pattern of chlorite schist which hosts the Kona zones is unique in the Fire Lake area. The data indicate that the protolith of these meta-volcanic rocks has a boninitic affinity and was likely derived from a depleted source region. Mafic meta-volcanic rocks (chlorite schist) elsewhere in this area are tholeiitic and may have developed in an arc or rift-related setting. Analyses of psammitic schists in the hanging wall of the West Kona zone indicate the rocks are felsic in composition and were likely deposited in a mature arc or continental-margin setting.

Organization: Government of Yukon | Gouvernement du Yukon
2000–01 Supplementary estimates no. 1

Supplementary estimates no. 1 for the Government of Yukon 2000–01 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. June 2000, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Regional-scale transposition and late large-scale folding in the Teslin Zone, Pelly Mountains, Yukon

Detailed geologic mapping of the Dycer Creek area and to the north at Last Peak has revealed several major findings: i) rocks of the Teslin Zone and Cassiar Platform are documented on both sides of the fault; ii) regional transposition ST (sub 2) fabrics observed on both sides of the fault are correlative with one another; iii) late km-scale F (sub 3) folding resulted in the modification of a near horizontal regional foliation on both sides of the fault into a steeply dipping orientation. In the hope of better constraining the timing of regional ductile D (sub 2) and D (sub 3) deformation, geochronology samples of four plutonic bodies have been collected during the 1995, 1996 and 1997 field seasons. Initial results of the study are promising as U-Pb dating of zircons from the Mendocina Orthogneiss within the Teslin Zone has confirmed a Devonian age, and dating of monazites from the Dycer Creek Stock and Last Peak Granite has bracketed the age of regional F (sub 3) folding between 113 and 98 Ma. These findings suggest that at least part of the regional deformation may be younger than previously proposed.

A copy of this thesis is available at the EMR library – QE195 G35 1999.
This thesis is available online at https://doi.org/10.22215/etd/1999-04228.

Organization: Government of Yukon | Gouvernement du Yukon
Multisensor airborne geophysical survey, Stewart River area, 115O/16

Data were acquired during an airborne geophysical survey (gamma ray spectrometer, magnetometer and VLF-EM) carried out by Fugro. Funding was provided by the Government of Yukon. The survey was completed between July 29 and September 21, 2000.

Organization: Government of Yukon | Gouvernement du Yukon
Geology of the Dezadeash Range and adjacent northern Coast Mountains (115A), southwestern Yukon: Re-examination of a terrane boundary

Granodiorite of the Coast Plutonic Complex intruded metasedimentary rocks in the Dezadeash Range of the northern Coast Belt in the late Mesozoic. Graphitic staurolite-biotite schist, associated with the Kluane Metamorphic Assemblage, underlies the western Dezadeash Range, whereas cordierite-biotite gneiss, previously correlated with the Late Proterozoic - Paleozoic Nisling Assemblage, is exposed in the eastern and southern regions. A terrane boundary was placed in the central Dezadeash Range.

Recent petrographic studies reveal a southeastward increase in metamorphic grade. Prograde appearance of cordierite partly obliterated an older schistosity and caused a fabric change near the postulated terrane boundary. Furthermore, typical continental margin rocks, such as marble and quartzite, are not observed. This suggests that all metamorphic rocks in the Dezadeash Range can be correlated with the Kluane Metamorphic Assemblage, whereas Nisling Assemblage rocks occur in the Coast Mountains to the east. Therefore, the terrane boundary is located in the Dezadeash River valley, further southeast than previously thought.

Organization: Government of Yukon | Gouvernement du Yukon
Pressure-depth relationships of the Roop Lakes Stock and Keno Hill Ag-Pb-Zn veins

Key mineral assemblages help determine pressure, temperature and depth of emplacement for mineralized veins of the Keno Hill district, as well as for local Cretaceous pluton emplacement. New electron microprobe analyses are presented on samples collected in the field, enabling further characterization of the hydrothermal and plutonic regimes. Staurolite-garnet-albite-biotite schist along the margins of the Cretaceous Roop Lakes stock record contact metamorphic conditions, averaging 518°C and 3450 bar. To the west, hydrothermal veins of the Keno Hill district containing pyrite-pyrrhotite-sphalerite-arsenopyrite, indicate hydrothermal conditions of approximately 400°C and 1500 bar. Lithostatic conditions for the pluton, and likely hydrostatic conditions for the veins, are interpreted to indicate a similar depth of emplacement for the two systems, near 10-13 km below the surface.

Organization: Government of Yukon | Gouvernement du Yukon
Permafrost and landslide activity: Case studies from southwestern Yukon Territory

Five case studies of recent landslides in southwestern Yukon Territory illustrate the role of permafrost in landslide processes of the region. In the Marshall Creek basin, permafrost degradation after recent forest fires caused numerous debris flows near the valley bottom. Similarly, on Haeckel Hill, firerelated deepening of the active layer has facilitated active layer detachment slides on upper hillside slopes. In the Kluane Range, the interface between frozen and unfrozen ground appears to control the depth of movement for active layer detachment slides and debris flows along Silver Creek. The failure mechanism on Mount Sumanik is controlled by a frozen substrate, which contributes to a reduction in drainage and elevated pore-water pressure. Lastly, thawing of segregated ice has caused a thaw slump of fine-grained sediment in lacustrine terraces along Takhini River.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary report on the bedrock geology of the Rackla River area, southern Wernecke Mountains, Yukon (parts of NTS 106C/4, 5 and 106D/1, 8)

The Rackla River area is underlain by normal faulted and gently folded sedimentary strata of the Paleoproterozoic Wernecke Supergroup, Mesoproterozoic Pinguicula Group, Neoproterozoic Hematite Creek Group and Windermere Supergroup, and Paleozoic Bouvette Formation. Gabbro dikes and sills that are likely age equivalent to the ca. 1380 Ma Hart River Sills cut the Wernecke Supergroup rocks. The presence of a mafic volcaniclastic horizon within the Bouvette allows its informal subdivision into a lower and upper member. These volcaniclastic rocks may the distal equivalent to volcanic rocks near the Tiger deposit, located ~20 km to the southwest. Three major angular unconformities are documented in the map area: at the base of the Rapitan Group, the base of the lower Bouvette, and the base of the upper Bouvette Formation.

Organization: Government of Yukon | Gouvernement du Yukon
The exotic nature of the Last Peak eclogite in the Teslin zone, south-central Yukon Territory

The history of an eclogite sample and a mica schist sample from the western Teslin zone are discussed in view of garnet zoning profiles. The preliminary metamorphic results support the contention (de Keijzer et al., in press), based on earlier regional and structural arguments, of a structural contact (the "basal thrust" of de Keijzer et al., in press) between the Last Peak eclogite (part of the Anvil assemblage) and metasedimentary rocks of North American affinity to the west of it. Consequently, the eclogite is considered "exotic" with respect to the metasedimentary rocks. The proposed position of the Last Peak eclogite, a few hundred metres above the interpreted basal thrust within the zone of ductile thrusting, explains why it has experienced pervasive amphibolitization (hydration) since fault zones commonly act as conduits for fluid. It is unclear how much of the amphibolite-to-greenschist facies Anvil rocks surrounding the eclogite have experienced earlier high-pressure metamorphism.

Organization: Government of Yukon | Gouvernement du Yukon