GeoYukon_GY_Geological

Geophysics Residual Magnetic Total Fields - 200m (1)

The Yukon Territory is underlain by a great variety of rock types ranging in age from Early Proterozoic to recent and representing diverse environments including epicratonic basins, subsiding shelves, foreland basins, island arcs and deep ocean basins. Episodes of compressional and extensional deformation, transcurrent faulting, metamorphism and plutonism further complicate the map pattern. This complex geological record has been described in terms of the interactions of several terranes (large parts of the earth's crust which preserve a common geological record) with each other and with the margin of ancestral North America. The Geological Survey of Canada, in partnership with the Yukon Geological Survey, have flown geophysical surveys that have provided aeromagnetic coverage of most of the Yukon. The Residual Magnetic Total Field has been extracted as 200 m grids from ESS-NRCan GDR database and trimmed to the Yukon boundary.

Assessment Report Footprints (3)

The Yukon Mining Assessment Report Footprints database contains over 7,500 reports documenting mineral exploration activity in Yukon since the 1950s. The majority fo these records are open to the public, more recent reports are confidential. Each record in this database represents a report, with the polygon geometry representing the area where work was performed. Key information about these reports has been captured, such as report number, title, author, year, claims, property name, expenditures, as well as a hyperlink to the scanned report, and it's associated data. The intended audience for this dataset is mining companies, prospectors, land use planners, First Nations, regulators, Yukon Environmental and Socio-Economic Assessment Board, Yukon Geological Survey, and Yukon Government.

Community Hazards - Pelly Crossing - 20k (6)

Landscape hazard maps were completed as part of a community hazards mapping program coordinated by the Northern Climate ExChange (Yukon Research Centre, Yukon College). Potential landscape hazards were assessed under changing future conditions by incorporating a variety of data sets, including surficial geology, topography (slope and aspect), permafrost distribution, site-specific permafrost data (e.g. ground penetrating radar, electrical resistivity tomography and borehole data), analyses of past hydrological and climatological trends, and future climate projections. The landscape hazard map identifies existing and potential geological hazards such as landslides, permafrost stability and flooding. The hazard map is presented in stoplight colours to provide an intuitive tool for community decision makers aiming to incorporate an adaptation planning framework into existing land use management practices. Detailed descriptions of data inputs and hazard analysis methodology are presented in an accompanying report (available for download from http://data.geology.gov.yk.ca/Reference/DownloadProduct/49693). An accompanying surficial geological map also describes detailed landscape characteristics such as surface landscape features, sediment texture, genetic material, surface expression and geomorphological processes (available for download from http://data.geology.gov.yk.ca/Reference/DownloadProduct/49694).

Community Hazards - Mayo - 20k (8)

Landscape hazard maps were completed as part of a community hazards mapping program coordinated by the Northern Climate ExChange (Yukon Research Centre, Yukon College). Potential landscape hazards were assessed under changing future conditions by incorporating a variety of data sets, including surficial geology, topography (slope and aspect), permafrost distribution, site-specific permafrost data (e.g. ground penetrating radar, electrical resistivity tomography and borehole data), analyses of past hydrological and climatological trends, and future climate projections. The landscape hazard map identifies existing and potential geological hazards such as landslides, permafrost stability and flooding. The hazard map is presented in stoplight colours to provide an intuitive tool for community decision makers aiming to incorporate an adaptation planning framework into existing land use management practices. Detailed descriptions of data inputs and hazard analysis methodology are presented in an accompanying report (available for download from http://data.geology.gov.yk.ca/Reference/DownloadProduct/49690). An accompanying surficial geological map also describes detailed landscape characteristics such as surface landscape features, sediment texture, genetic material, surface expression and geomorphological processes (available for download from http://data.geology.gov.yk.ca/Reference/DownloadProduct/49691).

Community Hazards - Dawson - 30m (10)

Landscape hazard maps were completed as part of a community hazards mapping program coordinated by the Northern Climate ExChange (Yukon Research Centre, Yukon College). Potential landscape hazards were assessed under changing future conditions by incorporating a variety of data sets, including surficial geology, topography (slope and aspect), permafrost distribution, site-specific permafrost data (e.g. ground penetrating radar, electrical resistivity tomography and borehole data), analyses of past hydrological and climatological trends, and future climate projections. The landscape hazard map identifies existing and potential geological hazards such as landslides, permafrost stability and flooding. The hazard map is presented in stoplight colours to provide an intuitive tool for community decision makers aiming to incorporate an adaptation planning framework into existing land use management practices. Detailed descriptions of data inputs and hazard analysis methodology are presented in an accompanying report (available for download from http://ygsftp.gov.yk.ca/publications/openfile/2014/OF2014-12/Dawson_report.pdf). An accompanying surficial geological map also describes detailed landscape characteristics such as surface landscape features, sediment texture, genetic material, surface expression and geomorphological processes (available for download from http://data.geology.gov.yk.ca/Reference/DownloadProduct/49699).

Geochemical Provinces - 250k (12)

Physiographic Regions - 250k (14)

Major Faults (17)

The framework of the Cordilleran orogen of northwestern North America is commonly depicted as a ‘collage’ of terranes – crustal blocks containing records of a variety of geodynamic environments including continental fragments, pieces of island arc crust and oceanic crust. The series of maps available here are derived from a GIS compilation of terranes based on the map published by Colpron et al. (2007) and Nelson and Colpron (2007), and include modifications from recent regional mapping, The dataset includes individual terrane data for British Columbia, Yukon and Alaska, as well as a layer showing selected major Late Cretaceous and Tertiary strike-slip faults. Graphic files derived from the GIS compilation were prepared for the Northern Cordillera (Alaska, Yukon and BC), the Canadian Cordillera (BC and Yukon), Yukon, and British Columbia. These maps are intended for page-size display (~1:5,000,000 and smaller). Polygons are accurate to ~1 km for Yukon and BC, and ~5 km for Alaska. More detailed geological data are available from both BC Geological Survey and Yukon Geological Survey websites. Descriptions of the terranes, their tectonic evolution and metallogeny can be found in Colpron et al. (2007), Nelson and Colpron (2007), Colpron and Nelson (2009).The terrane map project is a collaborative effort of the BC Geological Survey and the Yukon Geological Survey.

Folds - 250k (19)

Contacts (21)

Yukon Bedrock Geology MapThis update of the Yukon bedrock geology map builds upon the previous compilation by Gordey and Makepeace (1999, 2001). It includes new, detailed bedrock geology maps and regional compilations that have been published by the Yukon Geological Survey and the Geological Survey of Canada between 1999 and 2015, as well as some recent thesis works. A few of these maps were partially integrated into the digital dataset by Gordey and Makepeace (2003), but only as overlay to the 1999 compilation. A number of errors and omissions from the 1999 compilation of Gordey and Makepeace were also noted and corrected during compilation of this version of the map. The Yukon bedrock geology GIS dataset is regularly updated and can be downloaded from the Yukon Geological Survey’s website: www.geology.gov.yk.ca. Users are advised to consult the website regularly to ensure they are working with the latest version of the geodatabase or shape files. This update of the GIS dataset includes an expanded attribute structure (compared to the 1999 dataset) that facilitates searching of the geodatabase. The Yukon Geological Survey aims to provide users with the best available geoscience data for Yukon. Any revisions or additional geological information known to the user would be welcomed by the Yukon Geological Survey.Contact Person:Maurice Colpron (Maurice.Colpron@gov.yk.ca)Yukon Geology Contact AttributesFEATUREcontact (needed for query from merge line set)TEXT25TYPEType of contact – stratigraphic, intrusiveTEXT30SUBTYPEUnconformity, facies change, gradational… BLANK = ConformableTEXT30CONFIDENCEReliability – defined, approximate, inferred, coveredTEXT15REFERENCESource (publication)TEXT254SCALEMinimum scale for display (x 1000) – 1000, 250, 50…NUMBERINTEGERCOMMENTSUsed to track changes between versionsTEXTINTEGER

Drillhole Locations - 250k (23)

Core viewing and rock sawing facilities are available Monday - Friday, 8:30 a.m. to 4:30 p.m. To see information on the status of our drill core program and download forms for accessing the collection, visit http://www.geology.gov.yk.ca/core_collection.html.To reserve the core library facilities, please contact: Craig Nicholson (393-6495) - YGS-Minerals@gov.yk.caFor comments or feedback on the dataset, please contact Brett Elliot (867-667-8481) - brett.elliot@gov.yk.caField NameData TypeDescriptionDRILLHOLE_IDSHORT INTDatabase ID for each drillhole (UNIQUE)PROPERTYTEXT (150)Property that the drill hole is from.DDH_NUMBERTEXT (50)Drillhole number as assigned by the driller.ZONE_DESCTEXT (250)The zone within the property that the drill hole is from. Larger properties are divided into many zones.YEAR_DRILLEDSHORT INTYear that the drill hole was drilled.ELEVATION_MDOUBLEThe surface elevation of the drillhole collar.AZIMUTHDOUBLEThe horizontal angle of drilling.DIPDOUBLEThe vertical angle of drilling.TOTAL_LENGTH_MDOUBLEThe total length of core from the drill hole that is now at the core library.CORE_CONDITION_DESCTEXT (100)A description of the core’s general condition.TOTAL_BOXESSHORT INTTotal number of boxes of core.COMPLETE_HOLETEXT (5)Is the drill hole in its entirety at the core library?(Yes / No)CORE_SIZE_DESCTEXT (20)The wire line tube sized used. Descriptors use standard ‘Q’ wire line bit sizes.PUBLICLY_AVAILABLETEXT (3)Is the core available for public viewing? (Yes / no)MINFILE_NUMBERTEXT (10)The corresponding MINFILE number. MINFILE_NAMETEXT (75)The corresponding MINFILE name.LINK_TO_MINFILETEXT (250)Link to the corresponding MINFILE.COMMODITIESTEXT (250)Commodities associated with the drill hole.REFERENCESTEXT (250)Reports that reference the drill holes.CORE_OWNERTEXT (250)Individual or company that owns the core.END_OF_HOLE_MDOUBLEDepth of the hole.SUBMITTED_BYTEXT (250)Individual or company that submitted the core to the core library.PUBLIC_DATEDATEDate that core will become public, if not already publicly available.LATITUDE_DDDOUBLELatitude, in decimal degrees.LONGITUDE_DDDOUBLELongitude, in decimal degrees.DEPOSIT_MATERIALTEXT (100)Deposit material, ie. Purpose of hole.DEPOSIT_TYPE_1TEXT (250)Hierarchical classification of deposit type.DEPOSIT_TYPE_2TEXT (250)Hierarchical classification of deposit type.DEPOSIT_TYPE_3TEXT (250)Hierarchical classification of deposit type.DEPOSIT_TYPE_4TEXT (250)Hierarchical classification of deposit type.DEPOSIT_TYPE_LABELTEXT (250)Label that can be used to describe deposit type.

Mineral Occurrences - 250k (25)

Lithogeochemistry (27)

Geochronology is a discipline of geoscience which measures the age of earth materials and provides the temporal framework in which other geoscience data can be interpreted in the context of Earth history. This knowledge helps to answer questions such as when did a volcano last erupt, what is the rate of crustal uplift in a specific area, are rocks at one gold prospect the same age as those at another.

Regional Geochemical Surveys (RGS) - INAA (30)

Regional stream sediment geochemical data compilationNovember 2020Release notesThe regional stream sediment geochemical data compilation comprises data for more than 30 000 samples across Yukon. This compilation updates the work of Héon (2003). This new compilation includes results from the reanalysis of more than 24 000 samples; inductively coupled plasma mass spectrometry (ICPMS) analysis provides upgraded detection limits and a broader range of elements relative to previous analytical data. In addition to analytical data, efforts have been made to improve sample location accuracy. The data in this release are organized by analytical method with the geodatabase having six feature classes:RGS_SITE_WATER – site specific physiography and water quality data. These data are unchanged from the original releases.RGS_HEON – the same data as released in Héon (2003) with minor updates to sample location.RGS_AAS – all samples analyzed by atomic absorption spectrometry. Most of these data are superseded by INAA and ICPMS data.RGS_INAA – all samples analyzed by instrumental neutron activation analysis (INAA) and fire assay-neutron activation (FA-NA) analysis.RGS_ICPMS – all samples analyzed by inductively coupled plasma mass spectrometry (ICPMS).RGS_All – includes all AAS, INAA and ICPMS data.Collection of stream sediment samples in Yukon began in 1976 and ended in 2006. Three analytical methods have been used to analyze the minus 0.177 mm fraction (-80 mesh) of these samples: AAS, INNA (and FA-NA) and ICPMS. A simple description of each method is given below. For atomic absorption spectrometry(AAS) a 1 g aliquot is ‘partially digested’ using Lefort aqua regia or concentrated hot nitric acid. The digestion product is analyzed using an atomic absorption spectrometer. Oxide and silicate minerals are partially digested while some sulphide minerals are erratically volatilized. This means that AAS cannot be used to obtain accurate REE, Ta, Nb, As, Sb, Sn, Hg, Cr, or Au determinations.For instrumental neutron activation analysis (INAA), aliquots of sieved sediment (the minus 0.177 mm fraction) or milled rock ranging from 5 to 40 g are encapsulated and irradiated in a nuclear reactor before counting the primary gamma radiation induced by the neutron irradiation with a high resolution germanium gamma ray detector. Fire assay-neutron activation (FA-NA) analysis is similar but includes a pre-concentration fire assay step prior to irradiation and analysis. Results for both INAA and FA-NA are similar to those for samples analyses by fusion or other total digestion techniques. Neutron activation detection limits are typically higher than those by acid digestion – ICPMS. Commodity and pathfinder elements such as Au, As, Sb and W have reasonable detection limits by INAA and the data generated are relatively precise.For ICPMS analysis, aliquots of sieved sediment (the minus 0.177 mm fraction) ranging from 0.5 to 1 g are prepared using a partial digestion technique, typically aqua regia, followed by analysis of dissolution product by ICPMS. Sulphide minerals are completely oxidized and dissolved whereas most oxide and silicate minerals are only partially digested. This means that results produced by partial digestion methods are acceptable for elements such as Ag, As, Mo, Ni, Pb, Sb, Tl, and Zn but values for elements such as Al, Ba, Cr, Fe, P, Sn, Ti, Y, and Zr are likely to not reflect the actual element concentration in a sample. The sample size used for routine RGS sample analysis is too small be representative of Au in the original sample and thus Au by aqua regia digestion – ICPMS has poor precision.Further upgrades to this database are not anticipated. All samples that could be found in the GSC-Ottawa warehouse have been reanalyzed using ICPMS. Any errors or omissions in this database should be reported to the Yukon Geological Survey. Your feedback contributes to improving the accuracy of the geoscience databases for Yukon.Contact: YGSMinerals@gov.yk.ca; geology@gov.yk.ca

Regional Geochemical Surveys (RGS) - Heon (32)

Regional stream sediment geochemical data compilationNovember 2020Release notesThe regional stream sediment geochemical data compilation comprises data for more than 30 000 samples across Yukon. This compilation updates the work of Héon (2003). This new compilation includes results from the reanalysis of more than 24 000 samples; inductively coupled plasma mass spectrometry (ICPMS) analysis provides upgraded detection limits and a broader range of elements relative to previous analytical data. In addition to analytical data, efforts have been made to improve sample location accuracy. The data in this release are organized by analytical method with the geodatabase having six feature classes:RGS_SITE_WATER – site specific physiography and water quality data. These data are unchanged from the original releases.RGS_HEON – the same data as released in Héon (2003) with minor updates to sample location.RGS_AAS – all samples analyzed by atomic absorption spectrometry. Most of these data are superseded by INAA and ICPMS data.RGS_INAA – all samples analyzed by instrumental neutron activation analysis (INAA) and fire assay-neutron activation (FA-NA) analysis.RGS_ICPMS – all samples analyzed by inductively coupled plasma mass spectrometry (ICPMS).RGS_All – includes all AAS, INAA and ICPMS data.Collection of stream sediment samples in Yukon began in 1976 and ended in 2006. Three analytical methods have been used to analyze the minus 0.177 mm fraction (-80 mesh) of these samples: AAS, INNA (and FA-NA) and ICPMS. A simple description of each method is given below. For atomic absorption spectrometry(AAS) a 1 g aliquot is ‘partially digested’ using Lefort aqua regia or concentrated hot nitric acid. The digestion product is analyzed using an atomic absorption spectrometer. Oxide and silicate minerals are partially digested while some sulphide minerals are erratically volatilized. This means that AAS cannot be used to obtain accurate REE, Ta, Nb, As, Sb, Sn, Hg, Cr, or Au determinations.For instrumental neutron activation analysis (INAA), aliquots of sieved sediment (the minus 0.177 mm fraction) or milled rock ranging from 5 to 40 g are encapsulated and irradiated in a nuclear reactor before counting the primary gamma radiation induced by the neutron irradiation with a high resolution germanium gamma ray detector. Fire assay-neutron activation (FA-NA) analysis is similar but includes a pre-concentration fire assay step prior to irradiation and analysis. Results for both INAA and FA-NA are similar to those for samples analyses by fusion or other total digestion techniques. Neutron activation detection limits are typically higher than those by acid digestion – ICPMS. Commodity and pathfinder elements such as Au, As, Sb and W have reasonable detection limits by INAA and the data generated are relatively precise.For ICPMS analysis, aliquots of sieved sediment (the minus 0.177 mm fraction) ranging from 0.5 to 1 g are prepared using a partial digestion technique, typically aqua regia, followed by analysis of dissolution product by ICPMS. Sulphide minerals are completely oxidized and dissolved whereas most oxide and silicate minerals are only partially digested. This means that results produced by partial digestion methods are acceptable for elements such as Ag, As, Mo, Ni, Pb, Sb, Tl, and Zn but values for elements such as Al, Ba, Cr, Fe, P, Sn, Ti, Y, and Zr are likely to not reflect the actual element concentration in a sample. The sample size used for routine RGS sample analysis is too small be representative of Au in the original sample and thus Au by aqua regia digestion – ICPMS has poor precision.Further upgrades to this database are not anticipated. All samples that could be found in the GSC-Ottawa warehouse have been reanalyzed using ICPMS. Any errors or omissions in this database should be reported to the Yukon Geological Survey. Your feedback contributes to improving the accuracy of the geoscience databases for Yukon.Contact: YGSMinerals@gov.yk.ca; geology@gov.yk.ca

Regional Geochemical Surveys (RGS) - AAS (34)

Regional stream sediment geochemical data compilationNovember 2020Release notesThe regional stream sediment geochemical data compilation comprises data for more than 30 000 samples across Yukon. This compilation updates the work of Héon (2003). This new compilation includes results from the reanalysis of more than 24 000 samples; inductively coupled plasma mass spectrometry (ICPMS) analysis provides upgraded detection limits and a broader range of elements relative to previous analytical data. In addition to analytical data, efforts have been made to improve sample location accuracy. The data in this release are organized by analytical method with the geodatabase having six feature classes:RGS_SITE_WATER – site specific physiography and water quality data. These data are unchanged from the original releases.RGS_HEON – the same data as released in Héon (2003) with minor updates to sample location.RGS_AAS – all samples analyzed by atomic absorption spectrometry. Most of these data are superseded by INAA and ICPMS data.RGS_INAA – all samples analyzed by instrumental neutron activation analysis (INAA) and fire assay-neutron activation (FA-NA) analysis.RGS_ICPMS – all samples analyzed by inductively coupled plasma mass spectrometry (ICPMS).RGS_All – includes all AAS, INAA and ICPMS data.Collection of stream sediment samples in Yukon began in 1976 and ended in 2006. Three analytical methods have been used to analyze the minus 0.177 mm fraction (-80 mesh) of these samples: AAS, INNA (and FA-NA) and ICPMS. A simple description of each method is given below. For atomic absorption spectrometry(AAS) a 1 g aliquot is ‘partially digested’ using Lefort aqua regia or concentrated hot nitric acid. The digestion product is analyzed using an atomic absorption spectrometer. Oxide and silicate minerals are partially digested while some sulphide minerals are erratically volatilized. This means that AAS cannot be used to obtain accurate REE, Ta, Nb, As, Sb, Sn, Hg, Cr, or Au determinations.For instrumental neutron activation analysis (INAA), aliquots of sieved sediment (the minus 0.177 mm fraction) or milled rock ranging from 5 to 40 g are encapsulated and irradiated in a nuclear reactor before counting the primary gamma radiation induced by the neutron irradiation with a high resolution germanium gamma ray detector. Fire assay-neutron activation (FA-NA) analysis is similar but includes a pre-concentration fire assay step prior to irradiation and analysis. Results for both INAA and FA-NA are similar to those for samples analyses by fusion or other total digestion techniques. Neutron activation detection limits are typically higher than those by acid digestion – ICPMS. Commodity and pathfinder elements such as Au, As, Sb and W have reasonable detection limits by INAA and the data generated are relatively precise.For ICPMS analysis, aliquots of sieved sediment (the minus 0.177 mm fraction) ranging from 0.5 to 1 g are prepared using a partial digestion technique, typically aqua regia, followed by analysis of dissolution product by ICPMS. Sulphide minerals are completely oxidized and dissolved whereas most oxide and silicate minerals are only partially digested. This means that results produced by partial digestion methods are acceptable for elements such as Ag, As, Mo, Ni, Pb, Sb, Tl, and Zn but values for elements such as Al, Ba, Cr, Fe, P, Sn, Ti, Y, and Zr are likely to not reflect the actual element concentration in a sample. The sample size used for routine RGS sample analysis is too small be representative of Au in the original sample and thus Au by aqua regia digestion – ICPMS has poor precision.Further upgrades to this database are not anticipated. All samples that could be found in the GSC-Ottawa warehouse have been reanalyzed using ICPMS. Any errors or omissions in this database should be reported to the Yukon Geological Survey. Your feedback contributes to improving the accuracy of the geoscience databases for Yukon.Contact: YGSMinerals@gov.yk.ca; geology@gov.yk.ca