AndreaBozzo/ceres-open-data-index huggingface dataset:
Lead isotope signatures of Tintina Gold Province intrusions and associated mineral deposits from southeastern Yukon and southwestern Northwest Territories: Implications for exploration in the southeastern Tintina Gold Province

This paper presents new lead isotope data from intrusive rocks and several mineral deposits from the southeastern portion of the Tintina Gold Province (TGP). Lead isotopic studies of feldspars separated from various mid-Cretaceous intrusions in the study area and sulphide minerals from a number of mineral occurrences that are spatially associated with the intrusions were done in order to investigate possible relationships between the mineralization and magmatism. These data provide insight on metal sources within these systems and hence help to constrain exploration models. Results from this study indicate that: 1) the metals in many mineral deposits and prospects in the region are mostly derived from the mid-Cretaceous TGP intrusions; 2) the Sa Dena Hes deposit is broadly mid-Cretaceous in age; and 3) metals in apparently distal styles of intrusion-related gold mineralization are not entirely derived from magmatic sources.

Organization: Government of Yukon | Gouvernement du Yukon
Laser ablation ICP-MS U-Pb zircon ages for Cretaceous plutonic rocks in the Logtung and Thirtymile Range areas of southern Yukon.

Plutonic rocks of Early and mid-Cretaceous age are associated with tungsten-molybdenum porphyry and skarn-style mineralization in the Logtung area (Yukon MINFILE 105B 039, Deklerk and Traynor, 2005) in southwestern Wolf Lake map area (105B), and with tin-tungsten (-copper, lead, zinc) skarn mineralization at the Mindy and Ork occurrences (Yukon MINFILE 105C 038 and 054, respectively, Deklerk and Traynor, 2005) in the Thirtymile Range in eastern Teslin map area (105C). We have determined laser ablation U-Pb zircon ages of 109.4 ± 0.9 Ma and 110.5 ± 0.8 Ma for two samples of a biotite monzogranite stock that is inferred to be comagmatic with the felsic dyke system that partially hosts the Logtung mineralization. The latter sample is from the same locality from which a U-Pb zircon age of ~58 Ma was previously reported for zircons inferred to be hydrothermal in origin. Two separate phases of the Thirtymile Stock gave U-Pb ages of 102.7 ± 1.1 Ma and 100.9 ± 1.4 Ma.

Organization: Government of Yukon | Gouvernement du Yukon
Origin of gold in the White Channel sediments of the Klondike region, Yukon Territory

Results of a study to determine the origin of alteration in the Plio-Pleistocene White Channel sediments and bedrock using field observations, mineralogical and geochemical analysis. The study was coordinated with a sedimentological study of the White Channel gravel by S.R. Morison in 1985.

A copy of this thesis is available at the EMR library – TN414.C32 Y86.
This thesis is available online at https://doi.org/10.7939/R32F7JW6S.

Organization: Government of Yukon | Gouvernement du Yukon
Preliminary observations on the geology of the southern Big Salmon Range, south-central Yukon (parts of NTS 105C/13,14, 105F/4 and 105E/1)

Penetratively deformed rocks of the Yukon-Tanana terrane and Semenof block, and unfoliated Jurassic-Cretaceous intrusions are exposed in the southern Big Salmon Range of south-central Yukon. A newly mapped area, centred on the Boswell River, is divided into three structural panels by two regional-scale discontinuities, the Little Bear fault and the Sidney Creek fault.
The panel on the northeastern side of the Little Bear fault includes units dominated by metasedimentary rocks (Slate Mountain succession), mafic volcanic and volcaniclastic rocks (Wiley succession), and a varied metasedimentary/metavolcaniclastic unit (Livingstone Creek succession). Each of these is crosscut by intermediate-mafic intrusions of the Simpson Range suite and is therefore Early Mississippian or older. Fossiliferous limestone is interpreted to unconformably overlie phyllite of the Slate Mountain succession. Other units that crop out in this region are Permian augen schist and Cretaceous plutons, including Late Cretaceous quartz monzonite that hosts the Red Mountain Mo porphyry deposit.
The central part of the area, between the Little Bear and Sidney Creek faults, is dominated by mafic volcanic and plutonic rocks of the Sawtooth succession. These are along strike from, and provisionally correlated with the Moose formation of the Boswell assemblage. The Sawtooth succession is overlain by a carbonate and chert-bearing metasedimentary unit (Rosy succession), which hosts a small foliated metagranodiorite intrusion. A younger, as yet undated, mafic metavolcanic unit (Gunsight succession) is locally preserved above the Rosy succession. The metagranodiorite in the Rosy succession formed ca. 336 Ma and underwent metamorphic zircon growth in the Early Jurassic (~195 Ma). This zircon growth is interpreted to have accompanied regional, epidote-amphibolite to amphibolite-facies metamorphism and deformation.
Mississippian rocks of the Simpson Range suite dominate much of the southwestern domain. These intrusions crosscut quartzose schist, graphitic phyllite and metabasaltic rocks of the Flat Creek succession, which also hosts Middle Triassic metagabbro.
All pre-Jurassic rocks in the area are deformed, while post-tectonic intrusions include members of the Early Jurassic Lokken suite, the mid-Cretaceous Quiet Lake batholith and Iron Creek stock, and the aforementioned Red Mountain suite. Most Early Jurassic intrusions are undeformed, but deformation/hydration of some minor phases suggests they were intruded during the waning stages of deformation.
The Sidney Creek fault is cut by the Early Jurassic Sawtooth stock while the Cretaceous Iron Creek stock intruded across the trace of the Little Bear fault. The Little Bear and Sidney Creek faults are interpreted to define tectonic boundaries between Yukon-Tanana terrane and rocks of the Semenof block and may form part of a regional detachment between these units.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Permafrost Database: A new baseline data resource

The Yukon Geological Survey (YGS) has compiled available geotechnical and ground temperature data and related literature from government, industry and other contributors into the Yukon Permafrost Database. This paper reviews the database development process and structure, provides a snapshot of the primary datasets that have been loaded to date and discusses some of its limitations. The database is publicly accessible from an online portal (https://yukon.ca/en/yukonpermafrost) where data may be explored interactively in web maps, tables, and time series and ground temperature envelope graphics. Database contents are also available for download in a variety of formats. The Yukon Permafrost Database provides easily accessible data on permafrost distribution and thermal regime to support the assessment of thaw-related hazard and risk, and works towards the integration of disparate permafrost data at a territorial scale. The database will be maintained and updated regularly and YGS welcomes data contributions from government, industry and academic researchers to facilitate ongoing improvements to our collective knowledge of permafrost in Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Geological setting of gold-silver veins on Montana Mountain

The Montana Mountain area lies at the western edge of the Intermontane Belt, where the Whitehorse Trough overlies the Atlin Terrane. Paleozoic volcanic rocks of Atlin Terrane and clastic rocks of the Laberge Group occur along the margins of the area mapped. Cretaceous intermediate volcanic rocks of the Mount Nansen Group intrude this basement within a roughly circular area about 7 km in diameter and are referred to as the Montana Mountain Volcanic Complex. The northern margin of the complex is metamorphosed by a granite pluton related to the Coast Plutonic Belt. Porphyritic rhyolite dikes intrude the Mount Nansen Group and adjacent Laberge strata.

Quartz veins, some with economic mineralization, cut the granite and Mount Nansen volcanic rocks. Although Montana Mountain has a long history of prospecting and mining ventures, no detailed study of the geology is generally available.

Organization: Government of Yukon | Gouvernement du Yukon
Plants, bugs, and a giant mammoth tusk: Paleoecology of Last Chance Creek, Yukon Territory

An exceptional, complete tusk of a mature male woolly mammoth (Mammuthus primigenius) was recovered from a placer mining exposure on Last Chance Creek, Yukon Territory in July, 2002. The tusk is associated with peat dated to 25 700 ± 400 14C yrs BP. The direct association of Pleistocene fossils with past vegetation is rare, and allows a comparison between the local vegetation of Last Chance Creek and megafauna during the last glaciation. Preliminary analyses of plant and insect macrofossils from the peat indicate a vegetation cover composed of a mosaic of mesic riparian meadows with sedges, mosses, and willows, and well-drained grasslands or steppe with diverse herbs and sage. This discovery supports the interpretation that the "Mammoth-Steppe" biome existed near the onset of the last glaciation in eastern Beringia.

Organization: Government of Yukon | Gouvernement du Yukon
Reclamation practices and research on mineral exploration properties in the Yukon Territory

Reclamation testing was carried out on 3 mineral exploration sites in Yukon: an alpine site at the Red Ridge property in the Whitehorse area, and 2 subalpine sites, a boreal forest site at the Nucleus property in the Carmacks area, and a site in moist permafrost at the Hawk propeerty int he Dawson City area.

Organization: Government of Yukon | Gouvernement du Yukon
Moulting and Staging Waterbird Use of the Turner Lake Wetlands in the Yukon Territory: 2005 Aerial Survey Results

In 2005, the work of the Peel River Watershed Planning Commission commenced. Representatives from communities that have interest in the Peel Plateau including the Tetlit Gwichin First Nation (TGFN) in the Northwest Territories, Nacho Nyak Dun First Nation (NNDFN) in Mayo, Tr¿ondek Hwech¿in in Dawson, Vuntut Gwitchin First Nation (VGFN) in Old Crow, and YTG are involved in this process. In 2002 and 2004, the Yukon Government opened petroleum dispositions in the Peel Plateau region where a large complex of wetlands rich with wildlife and flora, known as the Turner Lakes is located. Turner Lakes was designated as an important wetland area by the Yukon Wetlands Technical Working Group. Little development has occurred on the Peel and the desire to develop land-use objectives by the planning commission before interest from outside land-users escalates, is paramount In 2002, Ducks Unlimited Canada (DUC), in partnership with other agencies, completed an earthcover mapping project of a four million hectare area of the Peel River watershed (Ducks Unlimited Inc. 2003). The detailed land cover mapping products will be used to help assist the land-use planning process for the Peel Plateau region.

Organization: Government of Yukon | Gouvernement du Yukon
Geological Compilation Maps of the Northern Stewart River Area, Klondike and Sixtymile Districts (115N/15, 16, 115O/13, 14 and Parts of 115O/15, 16)

This set of maps represents a geological compilation of the northern part of the Stewart River map area, southwest of the Tintina Fault Zone. This report includes six 1:50,000-scale bedrock geology maps covering NTS map sheets 115N/15, 16, 115O/13, 14, 15 and 16.

Organization: Government of Yukon | Gouvernement du Yukon
Regional stream sediment geochemical data, Teslin area, southern Yukon (NTS 105C)

This data package contains results for parts of the Teslin survey area (NTS 105C). This information has been provided in a variety of digital formats. PDF files include survey descriptions and details regarding methods, analytical data listings and summary statistics. Raw digital data of original field and analytical information plus new reanalysis results are included in Microsoft®Excel (XLS) format.

NGR surveys were originally conducted in the Teslin map area in 1985 and covered parts of NTS map sheet 105C (Geological Survey of Canada, 1986). Stream sediment and water samples were collected from a total of 865 sample sites. The work was undertaken by the GSC in conjunction with the Department of Indian Affairs and Northern Development, and the government of Yukon under the Canada-Yukon Mineral Development Agreement (1985-1989).

As part of the 2014 Yukon Database Upgrade Project, original material collected from 817 sample sites were selected for reanalysis. Samples from 48 sites located in protected areas were not included. Representative 2 gram splits were successfully recovered from a total of 865 samples. Due to a deficiency of available material, 2 samples were not recovered. The samples were delivered to Bureau Veritas Commodities Canada Ltd. (Vancouver) and were analyzed by an ultra-trace aqua-regia digestion ICP-MS package for 53 elements.

Organization: Government of Yukon | Gouvernement du Yukon
Geology of the Clinton Creek asbestos deposit, Yukon Territory

Clinton Creek asbestos deposit is situated at 77 km northwest of Dawson City on Clinton Creek in Yukon. Yukon Metamorphic Complex of Ordovician to Devonian age covers most of the Clinton Creek area. The most prominent metamorphism of the area occurred in Permian time. Based on intensity and style of deformation of ultramafic bodies and country rocks it is suggested that the ultramafic rocks were emplaced probably during the Permian period. Tintina fault is a weak zone along which the alpine ultramafic bodies of Clinton Creek and probably some of the others along and close to the Tintina Trench were tectonically emplaced. These were later folded and metamorphosed with the country rocks. During latest Cretaceous-earliest Tertiary time the area was intruded by acid intrusive rocks. The youngest undeformed and fresh basalt is probably of Selkirk volcanics equivalent. Three prominent phases of deformation were delineated. Probably the oldest and most complex phase occurred during the Permian, along with the initial movement of the Tintina fault. Small, tight, isoclinal folds are characteristics of this phase. The structural trend is roughly parallel to the direction of the Tintina Trench. Due to later deformations changes in direction of fold axes of this phase is common. The second phase of deformation gave rise to large recumbent folds with southerly vergence. Third phase of deformation gave rise to antiform structure of regional scale.

The Porcupine and Snow Shoe ultramafic bodies are mined for chrysotile asbestos. A few other ultramafic bodies contain appreciable amount of chrysotile-fibre but not of adequate quantity to be mined. Most of the ultramafic bodies are sheared or massive, and are devoid of known chrysotile-fibre. Chrysotile-fibre bearing serpentinized ultramafic masses within argillite unit or at the contact of argillite and other units seem to carry ore grade or substantial amount of chrysotile-fibre. Evidence of Clinton Creek asbestos deposit mainly supports formation of chrysotile-fibre as fracture filling. Although evidence of fracture filling rather than replacement seems convincing and exists on a wide scale, a few evidence indicates replacement characteristics on minor scale. The main phase of mineralization is believed to occur at the end of Cretaceous when acid intrusive rocks intruded the vicinity of the Clinton Creek area. These intrusions could have provided warm aqueous solution to react with the existing serpentine along fractures. This resulted deposition of chrysotile-fibre in an essentially closed system. Analysis of isotopic dates of the Yukon Crystalline Plateau shows a distinct grouping of igneous activity at mid Cretaceous and latest Cretaceous time.

A copy of this thesis is available at the EMR Library – QE195 H86.
This thesis is available online at https://open.library.ubc.ca/cIRcle/collections/ubctheses/831/items/1.0052868.

Organization: Government of Yukon | Gouvernement du Yukon
Exploration geology of the Mt. Skukum epithermal gold deposit, southwestern Yukon

Veins in Main Cirque are hosted in major normal fault zones bounding down-dropped blocks to depletion of a magma chamber below the adjacent eruptive centre. Residual heat within the exhausted magma chamber or perhaps a slight resurgence of intrusive material may have driven the hydrothermal circulation which resulted in regional alteration and deposition of the quartz-carbonate veins. Due to the close relationship of these factors, the identification of further eruptive chambers within the volcanic complex as well as any associated collapse features is critical to future exploration. Identification of additional faults associated with the collapse feature represented by Main Cirque is also important because these faults potentially host additional ore.

Gold-silver veins at Mt. Skukum display many of the classic characteristics of a relatively low temperature epithermal system as well as a low-sulphide adularia-sericite system. Vein formation probably occurred within several hundred metres of the paleosurface which may be represented by the intense kaolinitic alteration zone and the crater on the southeastern wall of Main Cirque. The Mt. Skukum deposits likely formed in a near surface environment by circulating meteoric waters in a hydrothermal system driven by a heat source associated with felsic dykes present in the area.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Snow Survey Network

Measurements of snow water equivalent and depth taken manually throughout the Yukon and neighboring regions of Alaska and British Columbia from 1958 to present. Surveys are performed around March 1, April 1, and May 1, plus or minus one week.

The data listed below is updated as soon as available. Note that some survey results may lag the target date of the first of the month by up to 10 days.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Geological Survey’s outreach program: 2024 highlights

The Yukon Geological Survey (YGS), a branch within the Government of Yukon, is dedicated to advancing our understanding of Yukon’s geology and disseminating this knowledge to various stakeholders, including other government departments, First Nations governments, private companies and the public. 

The YGS team conducts research across a range of Earth science fields including surficial and bedrock geology mapping, mineral assessments, permafrost and landslide monitoring, geotechnical monitoring along highway corridors, and geothermal research. This research generates data essential for understanding Yukon’s environment and addressing challenges. 

A foundational understanding of Earth science is essential for government partners, First Nations and the public to fully benefit from YGS’ findings. The YGS supports informed decision-making, responsible land stewardship, and economic development by making geoscience knowledge accessible. Outreach serves as a bridge between research and real-world application, ensuring that YGS’s research is not only shared but also understood by end users. 

The YGS seeks to inspire and engage with Yukoners by demonstrating how Earth science is both fascinating and relevant to daily life. The YGS helps individuals make informed decisions about the Yukon’s land and resources by sparking curiosity and building an understanding of Earth science. 

The YGS prioritizes outreach efforts by fostering collaboration with First Nations, supporting educators with curriculum-aligned resources, and encouraging public engagement with Earth science. This overview highlights YGS’ outreach initiatives and achievements throughout 2024.

Organization: Government of Yukon | Gouvernement du Yukon
Census 2006 (Semi-custom Profile of Yukon CSD Aggregations)

Datasource: Statistics Canada. 2008. Profile for Canada, Provinces, Territories, Census Divisions and Census Subdivisions, 2006 Census (table). Cumulative Electronic Profiles. Statistics Canada Catalogue no. 95F0495XCB01001. Ottawa. May 01, 2008. Version modified July 29,2008. http://www12.statcan.ca/english/census06/data/profiles/release/ListProducts.cfm?Temporal=2006&APATH=3&THEME=81&PTYPE=89103&GRP=1 (accessed November 7, 2008). 

Statistics Canada. 2009. 2006 Semi-custom Profile of Yukon CSD Aggregations, 2006 Census (table). CRO0104245. Ottawa. March 17, 2009.

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/census06/reference/dictionary/atoz.cfm.

Organization: Government of Yukon | Gouvernement du Yukon
2015–16 Supplementary estimates no. 2

Supplementary estimates no. 2 for the Government of Yukon 2015–16 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. April 2016, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Major and trace-element composition of platinum group minerals and their inclusions from several Yukon placers

Occurrences of placer platinum-group minerals (PGM) were reported in several gold placer deposits in Yukon. The source rock and the type of platinum mineralization are not known for these localities. We investigated five grains of Pt-Fe alloy from Burwash Creek (map area 115G and F), one grain from Scroggie Creek (map area 115O and N) and one grain from Wolverine Creek (map area 105C and D). Results of multiple electron microprobe analysis display elevated levels of Pd, Rh, Ir and Cu in these Pt-Fe alloy grains. The grains host micro-inclusions of various species of PGMs and silicate-melt inclusions with diopside, albite and sodic-calcic amphiboles. Trace element composition of the silicate inclusions determined using laser ablation ICP-MS shows a notable enrichment in large ion lithophile elements. We infer that the reported association of PGM and the trace element composition of silicate-melt inclusions observed in the studied grains are likely derived from a subduction-related Alaskan-type mineralization.

Organization: Government of Yukon | Gouvernement du Yukon
Geological setting of retrogressed eclogite and jade in the southern Campbell Range: Preliminary structure and stratigraphy, Frances Lake area (NTS 105H), southeastern Yukon.

The southern Campbell Range is underlain by greenschist facies volcaniclastic, epiclastic and sedimentary units of the Tuchitua River and Money Creek formations. Stratigraphy is deformed by at least three syn- to post-Early Permian folding events. Northwest-striking, high-angle faults imbricate the folded metasedimentary package with sheets of serpentinite. These rocks are juxtaposed against basinal rocks of the Fortin Creek group, to the east, along the Jules Creek fault.
Coarse-grained quartz-muscovite schist with lenses of retrogressed eclogite occurs within serpentinite and also in immediate fault contact with greenschist facies Tuchitua River and Money Creek metasedimentary rocks in the western field area. At the King Arctic mine, nephrite jade is the result of metasomatic replacement of Money Creek chert-pebble conglomerate and serpentinite by microcrystalline tremolite-actinolite along late high-angle faults.

Organization: Government of Yukon | Gouvernement du Yukon