AndreaBozzo/ceres-open-data-index huggingface dataset:
Report on the Detailed Mineral Assessment of the Proposed Wellesley Lake Special Management Area, Yukon

The Yukon and Canadian Governments and White River First Nation agreed to create a 530.30 km2 Special Management Area designated as a Habitat Protection Area that cover Wellesley Lake and the surrounding wetlands. It is currently proposed that Selkirk First Nation will add this SMA to their Final Agreement. The Habitat Protection Area designation does not require the withdrawal of the area from mineral staking and withdrawal has not been requested in the Memorandum of Understanding signed between the governments of Canada and Yukon and the First Nations. The purpose of this report is to present the results of the detailed mineral assessment of an approximately 1094 km2 area that encompassed the proposed Special Management Area. This enlarged area was included to provide some relative context for the assessment. The proposed area has no known mineral occurrences and although it was not the focus of the 2002 fieldwork, work conducted during 2002 did not identify any new mineral resources. The detailed mineral assessment is based on the mineral potential of the geology as identified by a panel of industry experts. The detailed mineral assessment map indicates that a belt of rocks crossing the northwestern portion of the proposed Special Management Area has the highest relative mineral potential. This area is underlain by Windy McKinley Terrane (WMT). The WMT is composed of an oceanic assemblage of ultramafic rocks, greenstone, chert, carbonate, and metamorphosed equivalents. The WMT was determined to have the highest relative mineral potential by the assessment panel conducting the detailed mineral assessment of the Wellesley study area. The assessment panel determined that the WMT has potential for hosting volcanic massive sulfide volcanogenic type, gabbroic nickel-copper and gold-quartz vein deposits. The Carmacks volcanic rocks in the southern portion of the proposed Special Management Area have potential for epithermal type deposits. Field work in 2002 located an area with anomalous gold, arsenic and antimony values in soil and stream sediment samples in the WMT just outside the proposed SMA boundary. Two soil samples collected from within the proposed SMA, from an area underlain by Carmacks Group basalts, yielded weakly anomalous gold values. Further evaluation work is recommended for the higher elevations where there is potential for rock formations to outcrop.

Organization: Government of Yukon | Gouvernement du Yukon
Experimental Reclamation Project, Shrub Trial Plots - Brewery Creek Mine

In September 2000, eleven shrub species were planted in experimental plots at three different areas of the Brewery Creek Gold Mine near the Klondike River. All of these shrub species naturally grow in the mine area. The purpose of this project is to find out which of these shrub species may be useful for revetating the large open areas at the mine site, after the mine closes. It is anticipated that this information will also be useful when revegetating other mine sites in the Yukon.

The three sites chosen for these experiments are a steep north-facing slope, a steep south-facing slope, and a lower, nearly level area. The shrubs were planted in six plots at each of the three sites. All three areas had been graded and seeded in 1996-97, and there was a fairly thick growth of grasses and clovers at the time the shrubs were planted. To determine if this thick growth interfered with the survivial of the newly planted shrubs, the grass and clover was first removed from one half of each plot.

Organization: Government of Yukon | Gouvernement du Yukon
First vertical derivative of the magnetic field, McQuesten Aeromagnetic Survey, NTS 115P/2 and part of 115P/1, Yukon

Map of the first vertical derivative of the magnetic field derived from data acquired during an aeromagnetic survey carried out by Goldak Airborne Surveys from November 19, 2008 to February 19, 2009. The 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
Clast fabric analysis of glacial diamict at the Allan Creek section and its implication for paleo-ice flow of Liard Lowland, southeastern Yukon

The Allan Creek section was identified and briefly described during reconnaissance mapping of the Watson Lake map area (NTS 105A) several decades ago and provides southeastern Yukon’s most complete known record of glaciation. The region supported ice sheets during multiple Quaternary glaciations, with landforms in Liard Lowland recording the ice flow toward the southeast during the Last Glacial Maximum (LGM). Inference of earlier ice-flow patterns requires sedimentologic characterization of glacial deposits underlying Liard Lowland. We expand macro-scale descriptions of the sequence of four diamict units exposed in the Allan Creek section to provide further insight on paleo-ice flow in southeastern Yukon. Pebble fabrics were measured from each diamict unit to compare with known LGM ice-flow directions and previously reported clast orientations. Three of the diamict units record ice-flow along the NW-SE trend of Liard Lowland. The second highest diamict in the sequence may record ice-flow directions both parallel and transvers to the basin’s trend. Only the lowest diamict unambiguously indicates unidirectional ice-flow; it suggests southeastward paleo-flow during early glaciation of southeastern Yukon, similar to that during the LGM.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Mining & Exploration Overview 1999

Yukon mining and exploration overview - 1999 is published as a stand-alone report as well as within the larger publication Yukon Exploration and Geology 1999. It gives a comprehensive overview of mining and exploration activity in the Yukon, including placer mining, Yukon Geology Program, Yukon Mining Incentive Program, and Robert E. Leckie Awards.

Organization: Government of Yukon | Gouvernement du Yukon
Gold Run Creek Erosion Control Project 2006 Follow-up Monitoring

A large erosion cut, approximately 300 metres long and up to 50 metres deep, has occurred on a stockpile of frozen overburden on the east bank of Gold Run Creek, a placer mining area southeast of Dawson City. In September 2005 erosion control structures reinforced with live willow cuttings were installed at the site. These structures consisted of earth retaining walls built to stabilize the slope failure and a flume to convey the water past the retaining walls while the willows had time to grow and strengthen the structures. In July 2006 the site was revisited. It was found that, while the earth retaining walls were intact, the flume had malfunctioned and further erosion had occurred beyond the walls. It was concluded that the collapse of the flume was the primary cause of the failure of the erosion control project.

Organization: Government of Yukon | Gouvernement du Yukon
2015–16 Supplementary estimates no. 1

Supplementary estimates no. 1 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. October 2015, Whitehorse, Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Fault tectonics in the Rapid depression of the Yukon North Slope (Canadian Arctic) - Summary of preliminary results

Mesozoic to Tertiary rocks in the Rapid depression on the Yukon North Slope are dissected by a N-NNE striking fault array. Two phases of Tertiary deformation are recorded across the Rapid depression east of the Barn fault: D1 is characterized by faults with either sinistral or dextral strike-slip displacement and overall ~W-E to NW-SE contraction; D2 faults developed under a regime of ~W-E-oriented contraction and N-S extension. The southern segment of the Barn fault is interpreted as an oblique dextral fault. The structural style is inconsistent with the propagation of a large-scale strike-slip fault zone such as the Kaltag fault through the Rapid depression, as previously suggested, but rather may indicate reactivation of older structural heterogeneity in the subsurface.

Organization: Government of Yukon | Gouvernement du Yukon
Yukon Geological Survey 2022 overview

This overview provides a summary of research highlights for 2022. Many of the projects described here are presented in more detail in the Yukon Exploration and Geology technical papers that are released with this Overview volume. Two highlights from 2022 are worth noting this year. First, 2022 marks the 30th anniversary of YGS. Since its creation, the Survey has grown and evolved into a multi-disciplinary organization that provides expertise across a range of disciplines (bedrock geology, regional tectonics, glacial history, geohazards and metallogeny) and excels at geoscience education and information management. The second noteworthy event to point out was the discovery of a mummified baby woolly mammoth (Nun Cho Ga) in June on Upper Eureka Creek. Two Survey staff had the privilege of assisting with the recovery of the mammoth and participating in the Tr’ondëk Hwëch’in First Nation ceremony that marked this scientifically and culturally important discovery. Jeff Bond subsequently mapped the discovery site in detail, documenting the conditions that led to the remarkable preservation of Nun Cho Ga.

Organization: Government of Yukon | Gouvernement du Yukon
Regional Stream Sediment and Water Geochemical Data, Frances Lake area, southeastern Yukon (NTS 105H)

This open file contains analytical data for stream silt sediment, stream water and field data - originally published as GSC Open File 1649, as well as Inductively Coupled Plasma Mass Spectrometry (ICP-MS) re-analysis data of archived stream silt sediment samples. This publication includes site-specific field observation and analytical data for stream sediments and waters from 917 sites. Silt sediments were analyzed for 38 elements plus loss-on-ignition and corresponding waters were analysed for uranium, fluoride and pH.

Organization: Government of Yukon | Gouvernement du Yukon
Quaternary Geology and Till Geochemistry of the Anvil District (Parts of 105K/2, 3, 5, 6 and 7), central Yukon Territory

The integration of till geochemistry and glacial geology into Yukon mineral exploration has been largely underused. In the Anvil district, thick glacial deposits have consistently hampered exploration. From the time of the initial discovery made in Vangorda Creek, it took an additional 20 years before the Grum deposit was discovered only 2 km to the northwest. This work examines the utility of till geochemistry as a method to trace mineralized soil/till samples back to their source rocks in the Anvil district. The Anvil district was last glaciated during the McConnell glaciation, which had a significant impact on the local terrain. The relatively swift-flowing Cordilleran ice sheet deposited thick sequences of till in low-lying areas and eroded southeast-facing slopes and hill summits in the Swim basin and Vangorda plateau. This type of glacial history is conducive for till geochemical exploration. Evidence for a late glacial Cordilleran re-advance is discussed and has implications on prospecting in the district.

A 12-km2 till grid was sampled northwest of the Faro deposit to map the glacial dispersion of mineralized sediment. The till geochemistry on the -230 mesh fraction (silt and clay) indicated a broad dispersion plume for
lead, zinc and copper extending more than 5 km west of the Faro Pb/Zn deposit. A section of the dispersion train may have a palimpsest origin. The soil geochemistry on the -80 mesh fraction, from 1964 data, indicated a much narrower dispersion plume extending directly from the Faro deposit. The geochemical changes at depth in the till stratigraphy were examined at the Vangorda mine. Results showed that anomalous lead concentrations, unlike zinc concentrations, were found throughout the 20-m till column. Regional till sampling was carried out in three areas peripheral to the known massive sulphide deposits. Results from these sampling programs highlighted anomalies in lead, zinc and copper. Overall, the application of till geochemistry proved to be successful in the Anvil district. Applying similar techniques to drift-covered terrain elsewhere in the northern Cordillera would be beneficial.

Organization: Government of Yukon | Gouvernement du Yukon
Late Holocene fluctuations of the north lobe of Llewellyn Glacier, Upper Yukon River Basin

Llewellyn Glacier contributes glacial meltwater to runoff entering the Yukon River, which flows through the hydroelectric power dam in Whitehorse, Yukon. An examination of lateral moraine stratigraphy, and radiocarbon and dendrochronological dating of in situ and detrital subfossil wood provide a record of fluctuations of Llewellyn Glacier over the past two millennia. Our data indicate the north lobe advanced sometime between AD 260 and AD 505, and reached within 70 m of its Little Ice Age maximum limit as early as the 17th century. The main lobe advanced as early as AD 1035, possibly between the First Millennium and Little Ice Age advances of the last two millennia, when glaciers have traditionally been considered more restricted. Results provide new information on the timing and frequency of fluctuations of Llewellyn Glacier, and can be used to assist with modelling the future impacts of climate change on glacial meltwater contributions to rivers and hydroelectric security in Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Mineral Assessment of the Northern Kluane Wildlife Sanctuary, Yukon

The mineral potential of the Northern Kluane Wildlife Sanctuary (KWS) is rated as HIGH.

Within the KWS, rocks of the Wrangellia Terrane rate the highest as they include two mineral deposits with proven reserves, one past producer, favorable stratigraphy for a variety of mineral deposits with production history and proven reserves elsewhere in the Cordillera as well as over 45 mineral occurrences within the boundaries of the KWS. Ultramafic hosted Ni-Cu-PGE; Fe, Cu, Au skarn, replacement or basaltic copper, VMS and polymetallic vein deposits are hosted in this belt of extremely high mineral potential.

Pennsylvanian and post-accretionnary Cretaceous and Tertiary plutons are also of high potential for a variety of mineral deposit types including porphyry copper, epithermal gold and silver, skarns and polymetallic veins. Sedimentary and volcanic rocks of the Gravina-Nutzotin belt are host to VMS, skarn, and gold and polymetallic vein occurrences.

The lower part of the Alexander Terrane, which is exposed within the KWS, contains few mineral occurrences locally but, at a regional scale, contains numerous important and varied mineral deposits. The Triassic succession of Alexander Terrane is not known to outcrop within the KWS although similar Triassic rocks of the Karmutsen Assemblage do. The Alexandrian portion of the KWS occupies the most remote and ice covered corner of the study area. 

The mineral potential of the Wrangell lavas and related plutons is not well understood. More mapping is needed in order to define the extent of the reported but undocumented felsic end member of this suite. A sliver of Coast Plutonic Metamorphic Complex and Kluane Schist occurs within the KWS. 

The Amphitheater assemblage and the Quaternary cover are the lowest rating units.
Geological map coverage is very poor for the area between the White and Donjek Rivers and needs to be upgraded in order to determine the extent of high potential rocks in that part of Wrangellia.

Organization: Government of Yukon | Gouvernement du Yukon
National Household Survey 2011 (Semi-custom Profile of Yukon Territory and Selected Regions)

Datasource: Statistics Canada. 2013. National Household Survey (NHS) Profile. 2011 National Household Survey. Statistics Canada Catalogue no. 99-004-XWE. Ottawa. Released September 11, 2013. http://www12.statcan.gc.ca/nhs-enm/2011/dp-pd/prof/index.cfm?Lang=E http://www12.statcan.gc.ca/nhs-enm/2011/dp-pd/prof/index.cfm?Lang=E (accessed October 9, 2014). 

Statistics Canada. 2014. 2011 Semi-custom Profile of Yukon Territory and Selected Regions, 2011 National Household Survey. Ottawa. February 20, 2014.

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 http://www12.statcan.gc.ca/nhs-enm/2011/dp-pd/prof/help-aide/aboutdata-aproposdonnees.cfm?Lang=E suppressed for confidentiality reasons. 

Values have been subjected to a confidentiality procedure known as http://www12.statcan.gc.ca/nhs-enm/2011/dp-pd/prof/help-aide/aboutdata-aproposdonnees.cfm?Lang=E random rounding 

For Statistics Canada's definition of terms, http://www12.statcan.gc.ca/nhs-enm/2011/ref/dict/azindex-eng.cfm click here

Organization: Government of Yukon | Gouvernement du Yukon
Foliation development and hydrothermal gold emplacement in metagabbroic rocks, central Yukon, Canada

Gold mineralization has been identified on the foliated margins of Paleozoic gabbroic intrusions, where a protracted series of structural preparation events has enhanced rock permeability. Rheological contrasts between these mafic rocks and amphibolite facies metasedimentary hosts have resulted in variable foliation development, especially at margins of mafic bodies. Initial foliation development centred on granitoid material in magmatic intrusion breccia, and was enhanced by syn-metamorphic biotite formation. Early mineralized quartz vein development occurred under greenschist facies conditions during and/or after regional Mesozoic thrust stacking of kilometre scale rock slabs. Initial vein emplacement was largely controlled by the foliation in mafic gneiss, and minor chloritic alteration and later hydrothermal generations cut across all structures. Gold mineralization involved only minor introduction of As, Sb, and S, and the hosting quartzite has higher As, Sb, and S content than most mineralized veins. Au is accompanied by elevated Bi, Mo, and Te in quartz veins.

Organization: Government of Yukon | Gouvernement du Yukon
Regional Geoscience Studies and Petroleum Potential, Peel Plateau and Plain

Initiated by the Northwest Territories Geoscience Office, the project Regional Geoscience Studies and Petroleum Potential, Peel Plateau and Plain, Northwest Territories and Yukon (2005 to 2009) involved partners from the Yukon Geological Survey, Geological Suvey of Canada, as well as universities and industry. The research team coupled field-based studies with subsurface analytical techniques to evaluate the study area's hydrocarbon potential. Over 70 interim publications have been produced. This volume compiles chapters devoted to several stratigraphic petroleum plays, along with structural and petroleum systems elements and a digital geodatabase (or atlas) of spatially based data collected during the course of the project . The result is a comprehensive body of geoscience work for Peel area which will be useful too in oil and gas exploration and for regional land use and business planning endeavours.

Organization: Government of Yukon | Gouvernement du Yukon
Summary of the stratigraphy, sedimentology and hydrocarbon potential of the Laberge Group (Lower-Middle Jurassic), Whitehorse trough, Yukon.

Whitehorse trough is a northwestward-tapering belt of Upper Triassic to Lower Cretaceous volcanic and sedimentary rocks extending ~650 km from the British Columbia–Yukon border, north to the vicinity of Carmacks in south-central Yukon. It consists of three main stratigraphic units (i.e., the Lewes River Group, Laberge Group and Tantalus Formation) representing three sedimentary basins, partially overlapping in space and time. The Laberge Group (Lower-Middle Jurassic), informally subdivided into the Richthofen, Tanglefoot and Nordenskiold formations, was deposited in the Laberge basin, a collapsing fore-arc basin in which the arc was undergoing uplift and erosion. The Richthofen formation consists of conglomerate, massive sandstone, sandstone-mudstone couplets, volcaniclastic rocks and minor limestone interpreted as submarine fan systems. The Tanglefoot formation consists of coal-bearing sandstone, mudstone, conglomerate, volcaniclastic rocks and minor limestone interpreted as delta systems and shallow marine deposits. The Richthofen and Tanglefoot formations are the same age (i.e., Sinemurian to Bajocian), but the Richthofen formation is restricted to the southern half of the basin, whereas the Tanglefoot formation occurs in the northern half. The Nordenskiold formation consists of subaerially erupted, resedimented volcaniclastics deposited mainly during Pliensbachian time. The Richthofen formation is interpreted as a spent source rock and the Nordenskiold formation is not a source rock. The Tanglefoot formation is interpreted as a potential source rock and possibly an effective source rock. It contains petroleum fluid inclusions (mainly 23°- 32° and 40°- 44° API gravity) indicating a minimum trapping temperature of 110-115°C. The Tanglefoot formation is also a potential reservoir rock.

Organization: Government of Yukon | Gouvernement du Yukon
Early Ordovician seamounts preserved in the Canadian Cordillera: Implications for the rift history of western Laurentia

The breakup of the supercontinent Rodinia and development of the western Laurentian rifted margin are in part recorded by Neoproterozoic to mid-Paleozoic igneous and sedimentary rock successions in the Canadian Cordillera. New bedrock mapping and volcanic facies analysis of Early Ordovician mafic rocks assigned to the Menzie Creek Formation in central Yukon allow reconstruction of the depositional environment during the volcanic eruptions, whole-rock geochemical data constrain the melting depth and crust-mantle source regions of the igneous rocks within the study area, and zircon U-Pb age studies provide determination of the precise timing of submarine eruptions. Menzie Creek Formation volcanic rocks are interlayered with continental slope strata and show lithofacies consistent with those of modern seamount systems. Representative seamount facies contain several kilometers of hyaloclastite breccia and pillow basalt with rare sedimentary rocks. Menzie Creek Formation seamounts form a linear array parallel to the Twopete fault, an ancient extensional or strike-slip fault that localized magmatism along the nascent western Laurentian margin. Zircon grains from two volcanic successions yielded high-precision chemical abrasion–thermal ionization mass spectrometry (CA-TIMS) dates of ca. 484 Ma (Tremadocian), which are interpreted as the age of eruption. Menzie Creek Formation rocks are alkali basalt and have oceanic-island basalt–like geochemical compositions. The whole-rock trace element and Nd-Hf isotope compositions are consistent with the partial melting of subcontinental lithospheric mantle at ~75–100 km depth. Post-rift, Early Ordovician seamounts in central Yukon record punctuated eruptive activity along a rift-related fault, the separation of a continental fragment from western Laurentia, or the oblique post-breakup kinematics from the counterclockwise rotation of Laurentia that facilitated local extension in the passive margin.

Organization: Government of Yukon | Gouvernement du Yukon
Petrography and reservoir characterization of Cretaceous sandstones of the Parkin, Fishing Branch, and Cody Creek formations of the Eagle Plains sedimentary basin, Yukon

A copy of this thesis is available at the EMR library – QE195.M368 2011.
This thesis is available online at https://emrlibrary.gov.yk.ca/theses/mcquilkin_m_2011.pdf.

Organization: Government of Yukon | Gouvernement du Yukon