AndreaBozzo/ceres-open-data-index huggingface dataset:
A reconnaissance inventory of permafrost-related landslides in the Pelly River watershed, central Yukon

A reconnaissance inventory of permafrost-related landslides in the Pelly River watershed was conducted in 2006, largely in response to local community concerns regarding the potential impacts of climate change on slope stability and possible effects on water quality. Using aerial photograph analysis, satellite imagery, and visual inspection from a fixed-wing aircraft, over 100 permafrostrelated slides were located near the Pelly and MacMillan rivers and various tributaries. Basic geomorphic characteristics were determined for many of the failures based on analysis of remote sensing data, and reviews of existing literature and surficial geology maps. Most of the landslides identified were small active-layer detachments and retrogressive thaw failures. Several large failures also illustrate important characteristics associated with permafrost-related landslides, including their source-area setting, triggers, high mobility, the longevity of their activity and their ability to impact very large areas. The nature and distribution of the identified failures highlights a number of implications for land-use in central Yukon and emphasizes the need for enhanced methods of permafrost detection and regional mapping in the Territory.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Geology Volume 3

This third volume of Yukon Geology represents five years of geoscientific research sponsored and funded by Exploration and Geological Services Division (EGSD). Under the Northern Mineral Policy, Indian and Northern Affairs Canada has the responsibility to develop ad maintain the geoscientific database. In support of this policy, EGSD has assisted the authors through direct funding or by logistical support during the field season. This volume covers a wide range of topics; the majority of papers have direct implications for mineral exploration in the Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Sedimentary pyrite as a gold-source in sediment-hosted gold occurrences in the Selwyn basin area, eastern Yukon

Intrabasinal sedimentary pyrite has recently been proposed as a potential gold source for sediment-hosted gold deposits. To evaluate this concept in the Selwyn basin area of eastern Yukon, we use laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) to analyse pyrite from the Carlin-type Conrad, and orogenic gold 3Ace occurrences. This paper texturally and chemically characterizes four generations of pyrite in grey to black mudstones and siltstones, but focuses 83% of the analyses on early and late diagenetic pyrite. Diagenetic pyrite from the Conrad occurrence is trace element poor with respect to deposit-proximal pyrite from shales in the Northern Carlin Trend of Nevada, but is similar in composition to distal diagenetic pyrite in these Nevada shales. Diagenetic pyrite from the 3Ace occurrence is very similar in composition to pyrite around the giant Sukhoi Log deposit in eastern Russia. It can be preliminarily concluded that the trace element composition of diagenetic pyrite from the Conrad and 3Ace occurrences is permissive of a locally derived intrabasinal sedimentary pyrite gold source.

Organization: Government of Yukon | Gouvernement du Yukon
A short history of the finding of gold in the Klondike

Gold was first reported in the Yukon region by fur traders and missionaries in the mid 1800s. Fur trader Robert Campbell noted the presence of gold near the site of Fort Selkirk in the early 1850s but neither missionaries nor fur traders were interested in gold. Nevertheless, miners drifted into the region. Economic depression pushed some prospectors northward. In 1880, the first miners were allowed to travel through one of the less important Tlingit trade routes, the Chilkoot Trail.

Gold was discovered In 1896 which led to a staking rush and an influx of prospectors the following summer. Construction and staking resulted in the occupation of the land of the Han First Nation people. The Han were removed to the Moosehide reserve, five kilometres down river from Dawson where they became legal charges of the Federal Department of Indian Affairs.

The growth of mining in the Klondike was supported by an expansion of commercial supply services. The Canadian government's maintenance of administrative powers and the dispatch of Mounties into the Klondike fulfilled the conditions for secure commercial capital investment. Increased flow of capital into the Klondike led to improvements in the transportation system supporting the region.

However, by 1902 gold production had started to slide. Old labour intensive mining methods were replaced by attempts to mechanize. By 1905 there were several steam shovels operating on different claims. However, the approach to mining still was still a fragmented one. Without comprehensive knowledge about the character of the resource, the major development strategy was one founded on luck. Effective mining demanded an integrated scientific approach using the most appropriate tools of modern technology. A radical change in resource development of the Klondike was in the making.

Organization: Government of Yukon | Gouvernement du Yukon
Metal-ratio zonation in the Keno Hill district, central Yukon

Silver has been won from narrow vein faults in the Keno Hill district for nearly 70 years. During this period, 3.9 million tonnes (4.3 million tons) of ore have yielded 5754 million grams (185 million ounces) of silver. All of this production has come from sub-cropping ore shoots; supergene enrichment is not an important factor in most deposits. Parallelsim of the ore zone with the present surface has been seen in other Cordilleran vein camps, but despite considerable effort, operators in these camps have met with little success in their search for blind ore shoots.

The potential for blind ore in the Keno Hill district is examined from the perspective of metal-ratio zonation. An approximate reconstruction of the original fracture pattern in the district and the metal-ratio definition of a hydrothermal system acting within these fractures suggest that some ore shoots have been eroded, some are exposed at the present surface, and others remain preserved at depth.

Organization: Government of Yukon | Gouvernement du Yukon
Bioengineering Trials at Noname Creek: Post-Fire Evaluation

In the fall of 2001, live willow cuttings were used for stabilizing an erosion gully on a permafrost slope at Noname Creek in the Big Creek drainage. These structures (gully breaks and pole drains) were upgraded in the fall of 2003 and the early spring of 2004. In the early summer of 2004, the Noname Creek valley was burned in a wildfire. In order to assess the effects of this fire on the erosion control structures, the site was revisited in the summer of 2005. 

The black spruce forest on the slope above Noname Creek had been completely burned. Although the above ground sections of the pole drains and gully breaks had been scorched, the structures remained intact and most of the lower cuttings were sprouting new growth. Falling trees had damaged a few of the structures. The willow cuttings staked in the gully between the structures had also been scorched. Although many of these staked willows were apparently dead, the older ones (staked in 2001) were sprouting new growth at ground level. 

It is expected that the erosion control structures, although partially damaged, will survive and continue to function. It is also anticipated that the flow of water in the gully will increase as a result of the escalated melting of permafrost on the slope above Noname Creek.

Organization: Government of Yukon | Gouvernement du Yukon
2007–08 Supplementary estimates no. 2

Supplementary estimates no. 2 for the Government of Yukon 2007–08 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. March 2008, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Landslide processes in discontinuous permafrost, Little Salmon Lake (NTS 105L/1 and 2), south-central Yukon

With increasing development in areas of discontinuous permafrost, greater emphasis is being placed on slope hazard assessment. The current research project was initiated in response to the occurrence of a large flow-type slide, the Magundy River landslide, with the aim of identifying and characterizing slope hazards in the Little Salmon Lake area of the central Yukon. Terrain evaluation studies identified over 35 areas of past and present landslide activity in the project area. Field work was completed in the summer of 2004 to obtain ground truth for the terrain evaluation and to further characterize the most prominent and active landslides. This paper provides an overview of the research project and summarizes observations on four distinct landslide processes found in the Little Salmon Lake area: debris flow, rock slumping, bimodal flow and multiple retrogressive slumping.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary lithostratigraphy of the Laberge Group (Jurassic), south-central Yukon: Implications concerning the petroleum potential of the Whitehorse Trough.

The Whitehorse Trough, a Mesozoic sedimentary basin in south-central Yukon that has potential for gas and oil, consists of the Lewes River Group (Triassic), the Laberge Group (Jurassic), and the Tantalus Formation (Jura-Cretaceous). The Laberge Group in the Carmacks (115I) and Laberge (105E) map areas is subdivided into four informal lithostratigraphic units: the Richthofen, Tanglefoot, Conglomerate and Nordenskiold formations. The Richthofen formation, distinguished by siltstone to very fine sandstone and mudstone couplets, is exposed in the southern part of the Laberge map area where it rests unconformably to conformably on the Lewes River Group and is unconformably and/or conformably overlain by the Tanglefoot formation. The Tanglefoot formation, distinguished by coalbearing, interbedded sandstone and mudstone, is exposed in the northern part of the Laberge map area and the southern part of the Carmacks map area where it rests unconformably on the Lewes River Group, and is overlain by the Tantalus Formation. The Conglomerate (conglomerate) and Nordenskiold (dacite tuff) formations occur as minor units within the Tanglefoot formation. The Richthofen-Tanglefoot formation unconformity and/or conformity is a potential petroleum play in the central Whitehorse Trough, whereas the Lewes River Group-Tanglefoot formation unconformity is a potential petroleum play in the northern Whitehorse Trough.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Government Closed Tenders

Includes information on closed tenders for Yukon Government from June 27, 2011 to present, and an access link to the Government of Yukon tender management system. Yukon tender management system allows businesses to access tender documents, receive notifications of procurement opportunities from the Government of Yukon, and access Government of Yukon tender forecasts.

Organization: Government of Yukon | Gouvernement du Yukon
Geology and Mineralization of the Tog, Listwaenite-Hosted Gold Occurrence, Southern Yukon Territory

The TOG mineral occurrence is characterized by visible gold, low sulphide content and high gold grades associated with structurally controlled zones of intense carbonate alteration of the host ultramafic rock. The mineral occurrence is in a package of basalt, ultramafite and their altered and tectonized equivalents that structurally overlies a succession of carbonate and chert.

Extreme carbonate metasomatism has altered the ultramafic rocks, producing listwaenite, a carbonate-silica-fuchsite alteration. High gold grades are restricted to the quartz veins and are not apparent in the listwaenite alteration.

Organization: Government of Yukon | Gouvernement du Yukon
General Administration Manual (GAM): Volume 2

The purposes of this manual are to: 

1. outline Highways and Public Work's and other departments overall processes in broad terms and and include the rationale behind these processes; 
2. offer an understanding of the various departmental policies related to transportation, information management, and building operations, as well as other related responsibilities managed by the government;
3. provide a list of common policies within Highways and Public Works, along with other government departments and agencies, that must be followed, unless exempted by legislation or a Management Board Directive.

Published by the [Department of Highways and Public Works](https://yukon.ca/en/department-highways-public-works).

### See also

- [General Administration Manual (GAM): Volume 1](https://open.yukon.ca/information/general-administration-manual-gam-volume-1)
- [General Administration Manual (GAM): Volume 3](https://open.yukon.ca/information/general-administration-manual-volume-3)
- [Financial Administration Manual](https://open.yukon.ca/information/financial-administration-manual)

Organization: Government of Yukon | Gouvernement du Yukon
The ground sloth Megalonyx from Pleistocene deposits of the Old Crow Basin, Yukon, Canada

The bear-sized ground sloth Megalonyx, endemic to North America, was widespread during the Pleistocene, reaching as far north as Alaska, Yukon, and Northwest Territories. Twenty-two specimens collected from 10 localities in the Old Crow Basin, northern Yukon, include several bones that can be referred to Jefferson's ground sloth (Megalonyx jeffersonii) on the basis of the distinctive morphology of the upper and lower caniniform teeth. All of the Yukon specimens are relatively small, suggesting a geological age earlier than Wisconsinan--probably Sangamonian. The Alaskan, Yukon, and Northwest Territories records imply that the species occupied a broad east-west range in northwestern North America during a warm phase of the late Pleistocene.

Organization: Government of Yukon | Gouvernement du Yukon
Silver-lead-zinc deposits of the Keno Hill-Galena Hill area, central Yukon

The Keno Hill-Galena Hill area is underlain by Yukon Group metasedimentary rocks which form the southern flank of the McQuesten anticline in the area. A series of faults, striking northeast and dipping steeply southeast, host the silver-lead-zinc lode deposits.

In excess of 65 ore deposits and prospects have been identified within the district. The principal lode deposits occur within the Central Quartzite in areas where brittle failure of the competent quartzite has allowed open areas conducive to ore deposition. Ore zones are also known to occur in the Lower Schist where a competent unit, such as greenstone lense, forms one or two of the walls of the vein fault.

The Husky Mine, located near the base of Galena Hill, is currently the main underground producer. Ore production from Husky to December 31, 1984 has totalled 359,450 tonnes (396,230 tons) grading 1450 g/t Ag (42.32 oz/ton). The lead and zinc content within Husky Deposit averages 3.96% and 0.27% Zn. The 10.7:1 silver to lead ratio (ounces silver to percent lead) in the Husky Deposit is the third highest among the district's major silver producers. The low zinc content is also unusual in light of the fact that the Husky Deposit exhibits very little evidence of oxidation.

The Husky S.W. Deposit is located 1400 m southwest of the Husky shaft. The Husky S.W. Vein zone is a highly fractured breccia structure with a quartz-rich gangue. Mineralization occurs as native silver with some argentite (acanthite) and stephanite within fracture veinlets with a pyrite/graphite matrix. The ore is completely non-visual.
The amount of lead and zinc within the deposit is very low (0.2% Pb aand 0.03% Zn). The silver to lead ratio of 195:1 in this deposit is an order of magnitude higher than in any deposit ever mined in the area (district average is 6:1).

Organization: Government of Yukon | Gouvernement du Yukon
Geology of the Spearhead Mountain Stock, Sheldon Lake Map sheet, Yukon Territory

A two square mile stock of biotite quartz monzonite forms the core of Spearhead Mountain. The stock has intruded Ordovician and Silurian sediments and has thermalIy altered them for a distance of up to one quarter mile. Mineralizing fluids ascended near vertical cooling fractures in the quartz monzonite, creating a porphyry copper deposit of chalcopyrite and pyrrhotite.

Trend surfaces from the first to the third order were established from plagioclase, orthoclase, quartz and total mafic minerals modal data and specific gravity values for the intrusive rock. Quartz, total mafic minerals and specific gravity vary systematically while orthoclase and plagioclase have erratic distributions. Contoured modal data and second degree trend surfaces for quartz, specific gravity and total mafic minerals show a circular distribution pattern. Linear trend surfaces indicate northwesterly and southeasterly gradients for quartz, plagioclase, orthoclase and specific gravity.

The original homogeneous granitic magma was contaminated by silica assimilation of the intruded, highly siliceous sediments. Incomplete diffusion of the contaminating silica Iead to a circular outward increase in silica and a corresponding outward decrease in mafic minerals, but did not significantly affect the distribution of orthoclase or plagioclase. The circular zonation of the high specific gravity mafic minerals gave rise to a similar zonation of specific gravities.

This thesis is available online at http://data.geology.gov.yk.ca/Reference/68112. A copy of this thesis is available at the EMR library – QE195 S26.

Organization: Government of Yukon | Gouvernement du Yukon
Biophysical map of Watson Lake area (NTS 105A/2), Yukon (1:50 000 scale)

This map was produced as part of a biophysical mapping pilot study carried out in the Watson Lake (NTS 105A/2) area in 2004. Biophysical mapping (also known as ecological land classification) is an integral system of mapping describing terrain conditions (surficial geology, slope, landscape position, drainage and permafrost conditions), as well as ecological values (vegetation community and structure, and soil moisture and nutrient regimes). At a local level (1:50 000) scale, biophysical maps are an essential tool for facilitating stewrdship and sustainable development of energy, mineral and land resources.

Organization: Government of Yukon | Gouvernement du Yukon
YukonAge 2002: A database of isotopic age determinations for rock units from Yukon Territory

This product contains over 1500 age determinations derived from over 1100 rock samples from the Yukon Territory in a searchable, relational-database format. The age determinations are taken from published and unpublished reports, including theses, and further include some otherwise unreported age determinations (those that have been made available and authorized for release by individual workers). Age determinations may be queried by the user on the basis absolute age (in Ma), location (NTS map sheet, latitute/longitude or UTM constraint specified by user) or by source (e.g., author, journal title, etc.). The data product is in Microsoft Access 2000 format; the user will require this software in order to utilize the database. A flatfile of all the data, and of the data sources, has been included (Microsoft Excel 2000 format) so that the data may be viewed without Microsoft Access; these files do not contain the full range of detail available for the data, nor does a flatfile format lend itself to querying and exporting data records. The sources flatfile is useful for those users wishing to import this information into a reference-based program, such as Endnote.

Organization: Government of Yukon | Gouvernement du Yukon
Placer Gold Potential Map - Dawson Land Use Plan (NTS 115N, O and part of 115P, 116B, C, F, G) Yukon

The placer potential mapping process consisted of applying a classification rating of 1 to 5 (lowest to highest) for all streams within the planning area. Factors affecting a stream's potential included development history and hard rock mining potential (gold deposit potential). Terrain attributes such as potential overburden thichness, water flow, or local topography were not factored into the rating due to lack of knowledges for most unmined drainages.

Organization: Government of Yukon | Gouvernement du Yukon
Geochronological and lithogeochemical studies of intrusive rocks in the Nahanni region, southwestern Northwest Territories and southeastern Yukon

Magmatism in the Nahanni region, which defines the eastern extent of the Tintina Gold Province, is generally associated with tungsten mineralization and/or gold-copper-antimony-bismuth-lead-zinc metal occurrences. Intrusions are subalkaline, granitic to granodioritic, and contain several types of textural variations and highly evolved phases. The intrusions range from large composite batholiths to small stocks with associated felsic dykes and veins. Initial U-Pb and Ar-Ar geochronology reveals ages of 97.5-95 Ma with short (0.5-1.5 m.y.) cooling periods, although the intrusion associated with the Cantung tungsten-skarn orebody cooled over a relatively long period (3 m.y.). Magmatism in the area has been interpreted as crustally derived, however, the rare earth element primitive-mantlenormalized profile revealed negative niobium, tantalum and titanium anomalies suggesting an arctype setting. Furthermore, the granites lack volumetrically significant, primary peraluminous mineralogies characteristic of S-type granites.

Organization: Government of Yukon | Gouvernement du Yukon
Composition of placer and lode gold as an exploration tool in the Stewart River map area, western Yukon

A reconnaissance study of the composition of gold from several placer streams in the Stewart River map area was carried out to characterize the likely style(s) of lode mineralization from which the placer gold in each stream was derived. Results of the study indicate that placer gold from Eureka and Black Hills creeks, as well as gold grains from colluvium in exploration pits at the head of Eureka Creek, have relatively low fineness, low copper contents and high mercury contents. These compositions are consistent with both the gold in colluvium and most of the placer gold having been derived from epithermal sources in the Eureka Dome or Henderson Dome area. Gold in placers in the Moosehorn Range is likely derived from intrusion-related, gold-bearing quartz veins exposed in the headwaters of the placer creeks, and is characterized by relatively high fineness, high copper contents and low mercury contents. Placer gold in Thistle, Kirkman and Blueberry creeks is very similar to that from streams in the Moosehorn Range, suggesting that an undiscovered intrusion-related gold deposit is present within the Thistle/Kirkman drainage basin.

Organization: Government of Yukon | Gouvernement du Yukon