AndreaBozzo/ceres-open-data-index huggingface dataset:
Overview of Yukon placer geology, gold production and prospects

The physiography and glacial history of Yukon bear directly on the geological setting, grade and economic viability of Yukon placer deposits. The limits of several advances of the Cordilleran Ice Sheet are evident in south central Yukon in the form of deposits and ice-marginal features left successively southeast by retreat of the three main glacial episodes.

The oldest, including multiple glaciations, was the pre-Reid at up to 3 Ma, succeeded by the Reid at up to 200 Ka, and the McConnell which ended approximately 10.3 Ka.

Yukon placer deposits are grouped into five broad categories based on age, gemorphic and sedimentologic characteristics. These are 1) Pliocene to early Pleistocene alluvial placer deposits preserved as high level terraces buried beneath non-auriferous overburden; 2) Pleistocene non-glacial alluvial placer deposits that occur as valley-bottom fill and low to high level terraces in unglaciated terrain; 3) Interglacial placer deposits that occur as valley-bottom alluvial fill or low terraces in drainages that have escaped the effects of glacial erosion; 4) Glacial placer deposits that have formed when gold from regional bedrock or paleoplacer sources was incorporated into glacial drift; and 5) Recent placer deposits that are found as colluvial deposits, valley-bottom alluvial blankets in gulches and tributary valleys, bar deposits in major river systems and beach and nearshore marine deposits.

Ten major regions produce placer gold in Yukon:: Indian River; Klondike; west Yukon (Sixtymile/Fortymile/Moosehorn); Lower Stewart; Clear Creek; Mayo; Dawson Range; Kluane; Livingstone and Whitehorse South. Since 1886, these areas have produced over 15 million crude ounces of placer gold, mainly from the unglaciated Klondike, west Yukon and Lower Stewart regions.

Many areas in Yukon remain unexplored for new placer gold deposits, both in unglaciated and glaciated areas. Areas of exploration potental in unglaciated areas include abandoned channels, oxbows and point bars, high level terraces, and tributary gulch and creek placers. In and along the margins of glaciated areas, pre-glacial or interglacial placer deposits may lie buried by glacial and glaciofluvial drift. Lower-grade placer deposits may have formed by glaciofluvial reworking of pre-glacial or interglacial placers. Non-glacial placer deposits may be found unconformably overlying glacial drift. Deeply incised interglacial valleys oriented obliquely to paleo-ice flow directions are also favourable locations for the preservation of economic placer deposits in glaciated areas.

Interest in exploring for new gold reserves has been sparked by new placer research and surficial mapping programs initiatied by the Yukon Geology Program and the Geological Survey of Canada. As this research continues to add to the understanding of placer gold deposits, exploration activity is expected to continue and new reserves in both unglaciated and glaciated areas may be found.

Organization: Government of Yukon | Gouvernement du Yukon
Geology and bedrock mapping updates at the Coffee Project gold deposit: implications for deposit classification

The Coffee Project comprises numerous gold occurrences, including the structurally-controlled gold-only Coffee deposit, which is hosted in poly-deformed Paleozoic basement rocks of the Yukon-Tanana terrane and Mesozoic plutons situated in the northern Canadian Cordillera, west-central Yukon. The deposit has been interpreted as having characteristics of numerous deposit types over the project’s history including epithermal, reduced intrusion-related, Carlin-type, and orogenic gold, as well as combinations of deposit types. Recent mapping efforts and new geochronology highlight a previously unknown secondary phase of the Permian Sulphur Creek suite and led to the relocation of the Coffee Creek fault which is interpreted as a primary controlling structure of the Coffee deposit. A new structural analysis builds on previous depth estimates and suggests that the deposit formed at a relatively shallow depth of 1–3 km and together with the new map has outlined the structural history of the deposit in greater detail. New dike geochemistry suggests some mineralized Coffee dikes may be related to the Carmacks group volcanics or Prospector Mountain suite intrusives, which implies a Late Cretaceous age of formation. Field relationships and timing of regional faulting together corroborate a minimum age of formation of ~57 Ma. Available multi-element geochemistry highlights a subtle Au-As-Sb ± Ag-Pb-Te-W-Zn-K metal association that suggests a possible magmatic component to the mineralizing fluids at Coffee. Newly drilled shallow mafic intrusions adjacent to the Coffee Creek pluton serve as a potential source and may be coeval with movement on the Coffee Creek and Big Creek fault systems.

Organization: Government of Yukon | Gouvernement du Yukon
Residual total magnetic field, McQuesten Aeromagnetic Survey, NTS 115O/1 and 115O/2, Yukon

A map of the residual total magnetic field derived from data acquired by Goldak Airborne Surveys during the period of November 19, 2008 to February 19, 2009. Data were recorded using a split-beam cesium vapour magnetometer mounted in the tail boom of a Piper Navajo aircraft.

Organization: Government of Yukon | Gouvernement du Yukon
Aeromagnetic Total Field, Yukon Territory/Northwest Territories, 106K/NW-NE

This map was compiled from data obtained as a result of an aeromagnetic survey carried out by Goldak Airborne Surveys using two Piper Navajo aircraft.The survey operations were carried out from July 18 to September 2, 2003. 
A 0.005 nT sensitivity split-beam cesium vapour magnetometer was mounted in the tail boom of each survey aircraft. 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 Globa 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 Mineral Deposits 2007

The following tables have been compiled from information derived from the Yukon MINFILE 2005 A database of mineral occurrences (Deklerk and Traynor, 2005). Reserve and resource figures presented are not calculated by Yukon MINFILE personnel, but are quoted from referenced industry sources, publications, assessment and/or technical reports, etc. The reader is encouraged to refer to the original data for detailed information.

Organization: Government of Yukon | Gouvernement du Yukon
Digital compilation of bedrock geology and till geochemistry of Glenlyon (105L) and eastern Carmacks (115I) map areas, Yukon Territory

Contains digital data files that were assembled or created from the 2002 Glenlyon component of the Targeted Geoscience Initiative (TGI) project. All data are provided in formats easily explored using widely available free softwares.
Features include
	GIS spatial data of bedrock and surficial geology, generalized background topography and georeferenced geophysical and satellite raster images.
	Interactive map projects to allow viewing and querying of the spatial data using a variety of common GIS software (ArcExplorer 2.0, ArcView 3.x, ArcMap 8.x, and MapInfo)
	Databases of field observations (bedrock and surficial geology)
	Publications relevant to the study area, including open file maps, and a collection of reports from the Yukon Exploration and Geology (YEG) series
	A photo gallery to illustrate representative rock units and surficial geology features
	Free softwares (Adobe Acrobat Reader 5 and ESRI ArcExplorer 2) for viewing publications and interactive maps.


Organization: Government of Yukon | Gouvernement du Yukon
2005–06 Supplementary estimates no. 1

Supplementary estimates no. 1 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. October 2005, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Forum Declaration and Joint Priorities Action Plan

In January 2017, [Yukon Forum](https://yukon.ca/en/your-government/find-out-what-government-doing/yukon-forum) leaders signed a declaration committing to working together and meeting four times a year. In May 2017, the Yukon Forum agreed on the four joint priority areas. In September 2017, the Yukon Forum approved a 5-year joint priority action plan.

Organization: Government of Yukon | Gouvernement du Yukon
Geology of the Haggart Creek-Dublin Gulch area, Mayo District, Yukon Territory

The map area is a four miles by ten miles strip that extends westward from the summit of Potato Hills. The centre of the map area lies about thirty miles north of Mayo, Yukon. Exposure is poor in many parts of the area, because of the thick Pleistocene cover. The rocks in the area are quartzites of the precambrian Yukon Group. Quartzite is generally micaceous and contains interbedded phyllite. Regional metamorphism (greenschist facies) has affected these rocks. An early bedding plane foliation has been modified by two distinct phases of folding. A granodiorite stock with related sills of similar composition has intruded the metamorphic assemblage and a five hundred feet wide thermal metamorphic aureole that contains corundum has been developed in the metasedimentary rocks around the stock. East trending and later north trending faults have disrupted the rocks. Mineralization in the area is of various types. Silver-lead-antimony veins occur in the west. A preliminary study of their mineralogy shows them to contain jamesonite, galena, sphalerite, chalcopyrite, pyrite, arsenopyrite, tetrahedrite and boulangerite in a gangue of siderite and dolomite. Secondary minerals include bindheimite or stetefeldite, anglesite, goethite, scorodite, covellite and chalcosite. Two stages of Pleistocene ice advance have modified the topography.

This thesis is available online at https://open.library.ubc.ca/cIRcle/collections/ubctheses/831/items/1.0104944. A copy of this thesis is available at the EMR library – QE195 T45.

Organization: Government of Yukon | Gouvernement du Yukon
2003–04 Supplementary estimates no. 2

Supplementary estimates no. 2 for the Government of Yukon 2003–04 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. March 2004, Whitehorse, Yukon."

Organization: Government of Yukon | Gouvernement du Yukon
Regional Stream Sediment and Water Geochemical Data, Sheldon Lake area, east-central Yukon Territory (NTS 105J)

This CD-ROM contains stream sediment and water data. These data have been compiled in separate flat files in Microsoft Excel file format. These standard file formats are easily imported into most spreadsheet, database and GIS computer programs. Products derived from these raw data consist of: data listings and a sample location map as Portable Document Format (PDF) files.

Organization: Government of Yukon | Gouvernement du Yukon
Stratigraphy and structural geology of the upper Hyland River area (parts of 105H/8, 105H/9), southeast Yukon

The upper Hyland River area of southeast Yukon is mostly underlain by rocks of the Neoproterozoic-Cambrian Hyland Group. The Yusezyu Formation, which forms the lower part of the Hyland Group, was previously undivided; however, good exposure in the upper Hyland River area facilitates the identification of marker horizons, including marble/limestone layers and thick units of quartz granule-pebble conglomerate. A new 1:50000-scale map of part of the area includes ten stratigraphic subdivisions in rocks previously assigned to the Yusezyu Formation. From northeast to southwest, the structure of the area is characterized by: (1) a southwest-vergent fold and thrust belt; (2) a central region with upright, northwest-trending folds; and (3) a highly deformed region characterized by tight-isoclinal folding, in which folds and stretching lineations are at a high angle to the trend of the orogen. This deformation was accompanied by amphibolite facies, low-pressure metamorphism. 
A steeply-dipping fault with long strike-length is coincident with the upper Hyland River valley.

Organization: Government of Yukon | Gouvernement du Yukon
Census 2001 (Semi-Custom Profile of Selected CSD Aggregates in Yukon)

Datasource: Statistics Canada. 2003. Profile for Canada, Provinces, Territories, Census Divisions and Census Subdivisions, 2001 Census (table). Cumulative Electronic Profiles. Statistics Canada Catalogue no. 95F0495XCB01001. Ottawa. October 22, 2003. http://www12.statcan.ca/english/census01/products/standard/profiles/ListProducts.cfm?%20Temporal=2001&APATH=3&RL=9&FREE=0 (accessed November 7, 2008). 

Statistics Canada. 2009. 2001 Census Semi-Custom Profile of Selected CSD Aggregates in Yukon, 2001 Census (tables). J5543 and CRO0105914. Ottawa. November 7, 2008.

Footnotes: A value of 0 in any given cell represents one of the following: 1) value is actually zero; 2) value may be random rounded to zero; or 3) value is more than zero but is suppressed for confidentiality reasons. This table is based on 20% data.

Values have been subjected to a confidentiality procedure known as random rounding.

For Statistics Canada's definition of terms, http://www12.statcan.ca/english/census01/Products/Reference/dict/atoz.htm.

Organization: Government of Yukon | Gouvernement du Yukon
Glenlyon project: Coherent stratigraphic succession of Yukon-Tanana Terrane in the Little Salmon Range, and its potential for volcanic-hosted massive sulphide deposits, central Yukon.

Geological mapping of Yukon-Tanana Terrane in Little Salmon Range has outlined a coherent stratigraphic succession in rocks that were previously described as strongly foliated and lineated mylonitic tectonites. The widespread occurrence of primary sedimentary and volcanic textures and the lateral continuity of the units are incompatible with the previous interpretation of the area. A laterally continuous volcanic arc sequence occupies the core of a broad synclinorium and rests unconformably on disparate clastic units to the east and west. The volcanic sequence is structurally overlain by an allochthonous sheet of distal turbidites. The occurrence of massive sulphide and exhalite within the volcanic sequence attests to the high mineral potential of this largely unexplored region.

Organization: Government of Yukon | Gouvernement du Yukon
Besa River Formation in Liard basin, southeast Yukon: Report on 2012 reconnaissance fieldwork

Prospective Devonian - Mississippian shale gas strata in Liard basin are the focus of a new collaborative study among research scientists of the Yukon Geological Survey, Northwest Territories Geoscience Office, and British Columbia Ministry of Energy, Mines and Natural Gas. Reconnaissance fieldwork in July 2012 involved measuring and sampling outcrops in each jurisdiction. One hundred eighty-seven metres of Besa River Formation shale and mudstone was measured and described in the Yukon part of Liard basin (NTS 95C/11). The section comprises three lithofacies: 1) mudstone and shale; 2) silty mudstone and shale; and 3) interbedded mudstone/shale and silty mudstone and shale. Shale is generally recessive, fissile, carbonaceous, very thinly laminated (<1 cm), and black on fresh surfaces. Mudstone is more competent than shale, thin to medium-bedded (1-5 cm), and medium to dark grey on fresh surfaces. Mudstone has variable silt and silica components based on observations of hand samples. Fossils are rare and include cephalopod impressions and unidentified biological fragments. The sampling program involved spectral gamma-radiation readings at one-metre intervals, and chip samples through two-metre intervals for Rock-Eval/total organic carbon, vitrinite reflectance, X-ray diffraction mineralogy, lithogeochemistry, and microfossil biostratigraphy. Laboratory results are anticipated in 2013.

Organization: Government of Yukon | Gouvernement du Yukon
Multisensor airborne geophysical survey, Stewart River area, 115N/2

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
Preliminary observations of the Bouvette Formation at Nadaleen Mountain, Yukon (NTS 106C/2, 3)

The Cambrian–Devonian Bouvette Formation outcrops over large parts of central Yukon. Despite its broad lateral and temporal extent, relatively little is known about its age range, facies distribution, depositional history, and significance for early Paleozoic paleogeographic reconstructions of northwestern Laurentia. At Nadaleen Mountain (NTS 106C/2,3) in east-central Yukon, the Bouvette Formation is remarkably well exposed and provides new insight into the transition between the southeastern Ogilvie platform and northern Selwyn basin. Here, we present preliminary field data collected from this region during 2017 and 2018, including measured stratigraphic sections, biostratigraphy, and detailed imagery acquired from Unmanned Aerial Vehicles (UAVs), in order to test the hypothesis that the Bouvette Formation locally preserves a platform margin reef and forereef succession. These observations not only provide an important new contribution to Yukon’s early Paleozoic depositional history, but also identify an exceptional location to study carbonate platform–margin depositional environments.

Organization: Government of Yukon | Gouvernement du Yukon
The Paradise gravel: Evidence for a pre-White Channel Gravel in the Klondike

New stratigraphic interpretations of exposures at Dago, Preido and Paradise hills on lower Hunker Creek suggest a more complex stratigraphic framework for the development of high-level bench gravels in the Klondike than has been previously put forward. A highly-altered gravel has formerly been interpreted to be part of the lower White Channel Gravel sequence and its degree of alteration attributed to enhanced groundwater diagenesis near the bedrock contact. New mining exposures indicate this altered gravel, here informally termed ‘Paradise gravel’, is laterally extensive and the alteration is not restricted to the bedrock interface. Furthermore, a cross-section reconstruction shows the White Channel Gravel is stratigraphically inset into the Paradise gravel. Alteration of the Paradise gravel is possibly a function of pedogenesis, suggesting a period of landscape stability followed its deposition. This pattern of sedimentation and potential stability was repeated within the lower White Channel Gravel and recorded by a zone of clay alteration and iron oxidation. 
Economically, the Paradise gravel is significant. At each locality investigated, the primary pay streak occurs in the Paradise gravel. Conversely, the White Channel Gravel is only economic where it sufficiently erodes and reworks the Paradise gravel. In nearby drainages, including upper Hunker Creek, the White Channel Gravel more completely reworks Paradise gravel to bedrock and becomes the pay unit. Preservation of the Paradise gravel documented in lower Hunker Creek may be due to its broad valley morphology. Future studies are recommended on the sedimentology of the Paradise gravel to understand gold distribution both vertically and within the pay channel(s). In addition, research into the pedogenic alteration could provide information on past climates during the Neogene.

Organization: Government of Yukon | Gouvernement du Yukon
2006 Regional Water Quality, Sediment and Benthic Invertebrate Assessment for the South MacMillan River Watershed, MacMillan Pass, Yukon

The Macmillan Pass in east-central Yukon (Figure 1) near the border with the Northwest Territories, is a highly mineralized area. The significant presence of metallic minerals in the MacMillan Pass area is reflected by the naturally elevated metal concentrations in both the soil and water (Soroka and Jack 1983, Kwong and Whitley 1993). A recent surge in metal prices has sparked renewed interest in mineral exploration and development at MacMillan Pass. Consequently, a broader understanding of the regional stream geochemistry is particularly important to help establish environmentally meaningful water quality objectives for the region.

Organization: Government of Yukon | Gouvernement du Yukon
A field, petrographic and preliminary S isotopic study of the Walt and Tyrala sediment-hosted barite occurrences (105O/7), and associated Ba-Zn-Pb mineralization, MacMillan Pass district, Yukon.

The MacMillan Pass district (map sheet 105O) located in east Yukon contains several sedimenthosted Ba ± Zn ± Pb deposits including the Tom and Jason deposits, as well as a multitude of 'barren' sediment-hosted barite occurrences. A classic sedimentary-exhalative (SEDEX) model has been postulated for these occurrences in which the barite horizons represent distal expressions of a hydrothermal vent system. Fieldwork was completed at the Walt and Tyrala barite occurrences that occur within the MacMillan Pass district in order to examine the deposit-scale geology and to sample undeformed barite horizons for subsequent geochemical analysis. Samples were also collected from drill core from the Hess barite occurrence. Barium mineralization occurs in both the Devonian Portrait Lake Formation (Lower Earn Group) and in underlying Ordovician-Silurian limestone of the Road River Group. A variety of textures were encountered that were indicative of both synsedimentary deposition of barite, as well as diagenetic to epigenetic barite mineralization. Base metal sulphides that are interpreted to post-date the barite mineralization were encountered at depth in drill core and are primarily hosted by Road River Group carbonates.

Organization: Government of Yukon | Gouvernement du Yukon
Geology of Sab Lake (105B/7) and Meister Lake (105B/8 ), Yukon

Geological maps (1:50,000 scale) of the Sab Lake (NTS 105B/7) and Meister Lake (NTS 105B/8) map areas, southeastern Yukon, including marginal notes on bedrock lithology, structural geology and economic geology.

Organization: Government of Yukon | Gouvernement du Yukon
Auriferous conglomerates at McKinnon Creek, west-central Yukon (115O/11): Paleoplacer or epithermal mineralization?

Siliciclastic sedimentary rocks at McKinnon Creek, Indian River area, consist of interbedded sandstone, conglomerate, siltstone and coal, in order of decreasing abundance. The sediments are Lower Cretaceous (Albian) in age and were deposited in fluvial and deltaic environments. Strata are at least 500 m thick and subdivided into a lower lithic unit and an upper quartzose unit. Upper Cretaceous-Paleocene andesite dykes and sills intrude the sedimentary rocks.

Conglomerates of the upper quartzose unit contain up to 3.4 g/t gold. Historically, this deposit was regarded as a plaeoplacer. However, an epithermal origin is suggested by extensive quartz and clay cementation and authigenic pyrite and tourmaline in the conglomerates and by their close proximity to faulting and intrusions. The area should be reassessed for its economic potential.

Organization: Government of Yukon | Gouvernement du Yukon