AndreaBozzo/ceres-open-data-index huggingface dataset:
Concentrations of flame retardants (BDE), polychlorinated biphenyls (PCB) and organochlorine pesticides measured in the blubber of belugas from the St. Lawrence Estuary population (Delphinapterus leucas) between 1987 and 2009

The St. Lawrence Estuary beluga population, designated as endangered, is declining and has shown no signs of recovery despite several conservation measures. Its exposure to organohalogen contaminants has been proposed as a possible limiting factor in its recovery. This dataset was built in order to investigate the temporal trends in the concentrations of contaminants in the population. 

Sampling consisted of collecting blubber samples from 128 beluga carcasses (63 females, 64 males, and 1 intersex) found stranded in the St. Lawrence Estuary between 1987 and 2009 and deemed sufficiently fresh (Geraci-Lounsbury Scale ≤4) to undergo laboratory necropsy. Samples were taken from the entire layer of blubber between the skin and muscle, except where indicated otherwise. The necropsy included the following procedures: determination of the cause of death, morphometric measurements, age assessment, and body condition evaluation. The concentrations of polybrominated flame retardants (BDEs), polychlorinated biphenyls (PCBs), and organochlorine pesticides were measured on the lipid fraction after lipid extraction. The methods are described in further detail in Lebeuf et al. (2004, 2007). 

This dataset contains morphometric measurements, sex and age, cause of death, a fitness index, the relative proportion of lipids in the blubber, and the concentration (pg/g wet weight) of polybrominated or emerging flame retardants, polychlorinated biphenyls (PCBs), and organochlorine pesticides and their derivatives.

Data quality control procedures included, for each set of 10 samples analyzed, a procedural blank, a Standard Reference Material, and the use of analogs labeled with stable isotopes. The accuracy of the analytical method was validated in interlaboratory studies.

The following individuals (individual_id) were also included in the publication below; however, the samples were subsampled differently and analyzed independently. 
https://open.canada.ca/data/en/dataset/dbf501e3-53b0-4330-a7fb-0cebdd40d1a3
DL_1997_05, DL_1997_07, DL_1998_07, DL_1998_08, DL_1998_09, DL_1999_01, DL_1999_02, 
DL_1999_06, DL_2001_01, DL_2001_03, DL_2001_07, DL_2002_02, DL_2002_03, DL_2002_08, 
DL_2003_01, DL_2003_05, DL_2003_08, DL_2004_08, DL_2004_09, DL_2004_10, DL_2005_01, 
DL_2005_04, DL_2005_05, DL_2006_01, DL_2007_09, DL_2007_10

Organization: Fisheries and Oceans Canada | Pêches et Océans Canada
Local Scale Biophysical Mapping for Integrated Resource Management, Watson Lake (NTS 105A/2), Yukon

Biophysical or ecosystem mapping is built on the principle that vegetation composition and distribution responds in predictable ways to specific abiotic terrain conditions. Terrain (surficial geology) mapping and subsequent stratification into ecosystem units forms the basis for local-scale biophysical mapping. Biophysical mapping is therefore an integrated system of mapping which describes both terrain conditions (surficial material type, slope, landscape position, drainage and permafrost conditions) and ecological factors (vegetation community and structure, and soil moisture and nutrient regimes).

The Watson Lake area was selected for a pilot biophysical mapping project because of imminent resource activities in southeastern Yukon. Local-scale (1:50 000) biophysical mapping was carried out in the 105A/2 NTS map area during 2004 in cooperation with Yukon Environment, Yukon Geological Survey and Cryogeographic Consulting. Analysis of hard copy 1:40 000-scale aerial photographs was conducted to outline preliminary terrain (surficial geology) and ecosystem units. Four weeks of summer field work was then conducted to ground truth the preliminary aerial photograph interpretation and develop a more detailed ecological classification system for southeast Yukon. Following the field season, the corrected mapping was digitized using stereo-georeferenced high-resolution scanned aerial photographs in Microstation Diap Viewer. Subsequent geographic information system (GIS) manipulation was performed in ArcGIS 9.0. Part of the purpose of the project was to develop a methodology for performing biophysical mapping using these technological tools.

Organization: Government of Yukon | Gouvernement du Yukon
Residual Total Magnetic Field, Aeromagnetic Survey of the Wolf Lake Area, Yukon, Part of NTS 105B (south half)

This aeromagnetic survey was carried out by Novatem Inc. from February 23, 2019 to April 2, 2019. The data were recorded using split-beam cesium vapour magnetometers mounted in the tail booms of two Piper Navajo aircraft. The nominal traverse and control line spacings were 400 m and 2400 m, and the aircraft flew at a nominal terrain clearance of 150 m. Traverse lines were oriented N45°E with orthogonal control lines.

Organization: Government of Yukon | Gouvernement du Yukon
Residual total magnetic field, aeromagnetic survey of the Llewellyn area

The aeromagnetic survey was carried out by Goldak Airborne Surveys and data were acquired from March 10 to July 6, 2017. Spacing for the nominal traverse and control lines were 400 m and 2400 m, respectively. Nominal terrain clearance was 150 m.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 105L

Aurora Geosciences Ltd was contracted to perform a review of publicly available digital magnetic geophysical data submitted with assessment reports to develop standardized products and compilations. Data submitted prior to March 2015 were considered.

Individual assessment report data were levelled and integrated with 1:250 000 compilations.

Four gridded PDFs have been produced (residual total magnetic field, reduced to pole, vertical derivative and tilt derivative). Original 250k geophysical data can be found in YGS Open File 2017-20.

Organization: Government of Yukon | Gouvernement du Yukon
First vertical derivative of the magnetic field, Northern Stevenson Ridge Aeromagnetic Survey, NTS 115O/1, 1150/2 and part of 115O/3, Yukon

This map of the first vertical derivative of the magnetic field was derived from data acquired during an aeromagnetic survey carried out by Goldak Airborne Surveys during the period of May 16 to July 1, 2009. The data were recorded using a split-beam cesium vapour magnetometer mounted in the tail boom of a Piper Navajo aircraft. The nominal traverse and control line spacings were 400 m and 2400 m, respectively, and the aircraft flew at a nominal terrain clearance of 150 m.

Organization: Government of Yukon | Gouvernement du Yukon
Enhanced interpretation of stream sediment geochemical data for NTS 105O and 105P

New geochemical data from re-analysis of archived stream sediment samples have been assessed using weighted sums modeling and catchment basin analysis as described in the methodology report that accompanies this map (YGS Open File 2015-10). Both commodity and pathfinder element abundances are evaluated to highlight areas that show geochemical responses consistent with a variety of base and precious-metal mineral deposit types. The results of modeling, completed using two approaches, are presented as a series of catchment maps and associated data files. This release is part of a regional assessment of stream sediment geochemistry that covers a large part of Yukon.

These principal component residuals maps accompany the weighted sums modeling done by D. Heberlein (OF2013-16).

Organization: Government of Yukon | Gouvernement du Yukon
Residual total magnetic field, Aeromagnetic Survey of the Nisling River Area, NTS 115 J/2 and part of 115 J/3, Yukon

This high sensitivity aeromagnetic survey was carried out by Goldak Airborne Surveys (Goldak) on behalf of the Geological Survey of Canada (GSC) between January 25th and March 26th, 2011. Aircraft equipment operated included three cesium vapour magnetometers, a GPS real-time and post-corrected differential positioning system, a flight path recovery camera, VHS titling and recording system, as well as radar and barometric altimeters. All data were recorded digitally in GEDAS binary file format. Reference ground equipment included two GEM Systems GSM-19W Overhauser magnetometers and a Novatel 12 channel GPS base station which was set up at the base of operations for differential post-flight corrections.

Eighty two flights (including test and calibration sorties) were required to complete the survey block. A total of 37,999 line kilometres of high resolution magnetic data were collected, processed and plotted. The traverse lines were flown at a spacing of 400 m with control lines flown at a separation of 2400 m. Nominal terrain clearance was specified at 100 m above ground.

Organization: Government of Yukon | Gouvernement du Yukon
Curie point depth mapping in Yukon

Curie point depth (CPD) mapping in Yukon was done using public domain aeromagnetic data from Natural Resources Canada. CPD mapping estimates the depth in the Earth’s crust to the Curie point temperature (~580°C) where magnetization in rocks disappears. When used in combination with other data, such as heat flow, CPD mapping can serve as a regional scale geothermal prospecting tool. In this study, two different CPD methodologies were employed using two different window sizes (200 km and 300 km). Qualitatively, the results were broadly consistent regardless of the method or window size. South-central Yukon exhibits shallow CPD values while northern and southeastern Yukon have deeper CPD values. This suggests that south-central Yukon has higher levels of heat flow in the mid-to-lower crust compared to the rest of the territory. The CPD results are largely consistent with heat flow measurements from the near surface. Specifically, regions with shallow CPD estimates correspond to areas with elevated heat flow measurements. Geologically, the regions with shallow CPD correspond to the Cordillera, while deep CPD areas appear to be co-located with continental platform rocks of Ancestral North America. Comparison with Yukon-specific crustal geotherms derived from other data suggest that the CPD estimates for south-central Yukon are systematically too deep by 2 to 12 km. The discrepancy is likely caused by the need to better understand and account for the fractal distribution of magnetization in the crust in Yukon. The results of this CPD study are valuable in that 95% of Yukon has been demarcated into regions of shallow CPD (higher heat flow) and deep CPD (lower heat flow). These findings should be combined with other data, such as heat generation and sediment thickness estimates, to identify the most prospective regions of elevated subsurface heat in Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Greater Whitehorse area permafrost characterization

This document comprises a compilation of technical reports for field investigations completed by Yukon University Research Centre (YRC) at seven case study sites that represent common permafrost environments in the greater Whitehorse area. This work was completed for Yukon Geological Survey (YGS) with core funding from Crown-Indigenous Relations and Northern Affairs Canada (CIRNAC) Climate Change Preparedness in the North (CCPN) program.
The primary purpose of the report is to document results of field investigations (e.g., ERT geophysics, drilling and geotechnical laboratory analysis) completed by YRC at each site. Supporting background material and case study geological descriptions were prepared by YGS, along with general discussion relating to climate change and implications for development.

Organization: Government of Yukon | Gouvernement du Yukon
Residual Total Magnetic Field, Aeromagnetic Survey of the Marsh Lake Area, Yukon, Part of NTS 105C/North

This aeromagnetic survey was carried out by Geo Data Solutions GDS Inc. from January 12, 2018 to March 16, 2018. The data were recorded using split-beam cesium vapour magnetometers mounted in the tail booms of a Beechcraft King Air and a Piper Navajo. The nominal traverse and control line spacings were 400 m and 2400 m, and the aircraft flew at a nominal terrain clearance of 150 m. Travers lines were oriented N45°E with orthogonal control lines.

Organization: Government of Yukon | Gouvernement du Yukon
Aeromagnetic survey of the Nash Creek area, Yukon

This aeromagnetic survey was carried out by Geo Data Solutions (GDS) from January 19, 2020 to March 28, 2020. The data were recorded using split-beam cesium vapour magnetometer mounted in the tail boom of a Beechcraft King Air aircraft. The nominal traverse and control line spacings were 400 m and 2400 m, and the aircraft flew at a nominal terrain clearance of 150 m. Traverse lines were oriented N0°E with orthogonal control lines.

There are 10 pdf maps accompanying this open file. Sheets 1–5 are residual total magnetic field maps. Sheets 6–10 are first vertical derivative of the magnetic field maps.

This survey was funded by phase 2 of the Geo-Mapping for Energy and Minerals program (GEM-2) of the Lands and Minerals Sector, Natural Resources Canada.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 115A

Aurora Geosciences Ltd was contracted to perform a review of publicly available digital magnetic geophysical data submitted with assessment reports to develop standardized products and compilations. Data submitted prior to March 2015 were considered.

Individual assessment report data were levelled and integrated with 1:250 000 compilations.

Four gridded PDFs have been produced (residual total magnetic field, reduced to pole, vertical derivative and tilt derivative). Original 250k geophysical data can be found in YGS Open File 2017-32.

Organization: Government of Yukon | Gouvernement du Yukon
Residual total magnetic field, Aeromagnetic Survey of the Nisling River Area, NTS 115 H/14 and part of 115 H/15, Yukon

This high sensitivity aeromagnetic survey was carried out by Goldak Airborne Surveys (Goldak) on behalf of the Geological Survey of Canada (GSC) between January 25th and March 26th, 2011. Aircraft equipment operated included three cesium vapour magnetometers, a GPS real-time and post-corrected differential positioning system, a flight path recovery camera, VHS titling and recording system, as well as radar and barometric altimeters. All data were recorded digitally in GEDAS binary file format. Reference ground equipment included two GEM Systems GSM-19W Overhauser magnetometers and a Novatel 12 channel GPS base station which was set up at the base of operations for differential post-flight corrections.

Eighty two flights (including test and calibration sorties) were required to complete the survey block. A total of 37,999 line kilometres of high resolution magnetic data were collected, processed and plotted. The traverse lines were flown at a spacing of 400 m with control lines flown at a separation of 2400 m. Nominal terrain clearance was specified at 100 m above ground.

Organization: Government of Yukon | Gouvernement du Yukon
Geophysical Series, parts of NTS 115J/4, 115K/1, 115K/2, 115K/7, 115K/8, MEGATEM® II survey, Central Stevenson Ridge area, Yukon

The airborne survey was flown over the central Stevenson Ridge area. Flight line spacing is 400m in a 90-270 degree direction. Nominal terrain clearance of the EM receiver bird is 60m.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 105H

Reprocessing of magnetic data for Yukon was performed between November 2016 and March 2017. Aeromagnetic data were compiled, data of different resolutions were merged, and a series of images individually levelled for each map sheet were produced. For each 250k-scale map, the following magnetic derivative maps were produced: 1. Residual Total Magnetic Field; 2. Reduced-to-Pole Magnetic Field (RTP); 3. First Vertical Derivative of the Reduced-to-Pole Magnetic Field (RTP_VD); and 4. Tilt Derivative of the Reduced-to-Pole Magnetic Field (RTP_TDR). These maps are provided as pdfs, geotiffs and Geosoft grid files. Colour ramps/legends are provided for each map.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 116C

Aurora Geosciences Ltd was contracted to perform a review of publicly available digital magnetic geophysical data submitted with assessment reports to develop standardized products and compilations. Data submitted prior to March 2015 were considered.

Individual assessment report data were levelled and integrated with 1:250 000 compilations.

Four gridded PDFs have been produced (residual total magnetic field, reduced to pole, vertical derivative and tilt derivative). Original 250k geophysical data can be found in YGS Open File 2017-46.

Organization: Government of Yukon | Gouvernement du Yukon
Reprocessing of Yukon magnetic data for NTS 117C

Reprocessing of magnetic data for Yukon was performed between November 2016 and March 2017. Aeromagnetic data were compiled, data of different resolutions were merged, and a series of images individually levelled for each map sheet were produced. For each 250k-scale map, the following magnetic derivative maps were produced: 1. Residual Total Magnetic Field; 2. Reduced-to-Pole Magnetic Field (RTP); 3. First Vertical Derivative of the Reduced-to-Pole Magnetic Field (RTP_VD); and 4. Tilt Derivative of the Reduced-to-Pole Magnetic Field (RTP_TDR). These maps are provided as pdfs, geotiffs and Geosoft grid files. Colour ramps/legends are provided for each map.

Organization: Government of Yukon | Gouvernement du Yukon
First Vertical Derivative of the Magnetic Field, Aeromagnetic Survey of the Marsh Lake Area, Yukon, Part of NTS 105F/North

This aeromagnetic survey was carried out by Geo Data Solutions GDS Inc. from January 12, 2018 to March 16, 2018. The data were recorded using split-beam cesium vapour magnetometers mounted in the tail booms of a Beechcraft King Air and a Piper Navajo. The nominal traverse and control line spacings were 400 m and 2400 m, and the aircraft flew at a nominal terrain clearance of 150 m. Travers lines were oriented N45°E with orthogonal control lines.

Organization: Government of Yukon | Gouvernement du Yukon
First vertical derivative of the magnetic field, Northern Stevenson Ridge Aeromagnetic Survey, NTS 115J/13 and 115J/14, Yukon

This map of the first vertical derivative of the magnetic field was derived from data acquired during an aeromagnetic survey carried out by Goldak Airborne Surveys during the period of May 16 to July 1, 2009. The data were recorded using a split-beam cesium vapour magnetometer mounted in the tail boom of a Piper Navajo aircraft. The nominal traverse and control line spacings were 400 m and 2400 m, respectively, and the aircraft flew at a nominal terrain clearance of 150 m.

Organization: Government of Yukon | Gouvernement du Yukon
Stratigraphic Sections

This GIS dataset is a Yukon-wide compilation of detailed stratigraphic section descriptions from 421 locations as depicted on 51 published and unpublished surficial geology maps of various scales produced by the Geological Survey of Canada and Yukon Geological Survey. Attribute data for 1198 section layers includes: unit depths and thicknesses; surficial material classification; and detailed descriptive notes such as texture, structure, sorting, colour, age and/or location.

Organization: Government of Yukon | Gouvernement du Yukon
Enhanced interpretation of stream sediment geochemical data for NTS 105B

New geochemical data from re-analysis of archived stream sediment samples have been assessed using weighted sums modeling and catchment basin analysis as described in the methodology report that accompanies this map (YGS Open File 2015-10). Both commodity and pathfinder element abundances are evaluated to highlight areas that show geochemical responses consistent with a variety of base and precious-metal mineral deposit types. The results of modeling, completed using two approaches, are presented as a series of catchment maps and associated data files. This release is part of a regional assessment of stream sediment geochemistry that covers a large part of Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
Residual total magnetic field, Aeromagnetic Survey of the Nisling River Area, Parts of NTS 115 G/10, 11, Yukon

This high sensitivity aeromagnetic survey was carried out by Goldak Airborne Surveys (Goldak) on behalf of the Geological Survey of Canada (GSC) between January 25th and March 26th, 2011. Aircraft equipment operated included three cesium vapour magnetometers, a GPS real-time and post-corrected differential positioning system, a flight path recovery camera, VHS titling and recording system, as well as radar and barometric altimeters. All data were recorded digitally in GEDAS binary file format. Reference ground equipment included two GEM Systems GSM-19W Overhauser magnetometers and a Novatel 12 channel GPS base station which was set up at the base of operations for differential post-flight corrections.

Eighty two flights (including test and calibration sorties) were required to complete the survey block. A total of 37,999 line kilometres of high resolution magnetic data were collected, processed and plotted. The traverse lines were flown at a spacing of 400 m with control lines flown at a separation of 2400 m. Nominal terrain clearance was specified at 100 m above ground.

Organization: Government of Yukon | Gouvernement du Yukon
Enhanced interpretation of stream sediment geochemical data for NTS 115J and 115K

New geochemical data from re-analysis of archived stream sediment samples have been assessed using weighted sums modeling and catchment basin analysis as described in the methodology report that accompanies this map (YGS Open File 2015-10). Both commodity and pathfinder element abundances are evaluated to highlight areas that show geochemical responses consistent with a variety of base and precious-metal mineral deposit types. The results of modeling, completed using two approaches, are presented as a series of catchment maps and associated data files. This release is part of a regional assessment of stream sediment geochemistry that covers a large part of Yukon.

Organization: Government of Yukon | Gouvernement du Yukon
First vertical derivative of the magnetic field, Aeromagnetic Survey of the Nisling River Area, Parts of NTS 115 H/6, 7, 10, 11, Yukon

This high sensitivity aeromagnetic survey was carried out by Goldak Airborne Surveys (Goldak) on behalf of the Geological Survey of Canada (GSC) between January 25th and March 26th, 2011. Aircraft equipment operated included three cesium vapour magnetometers, a GPS real-time and post-corrected differential positioning system, a flight path recovery camera, VHS titling and recording system, as well as radar and barometric altimeters. All data were recorded digitally in GEDAS binary file format. Reference ground equipment included two GEM Systems GSM-19W Overhauser magnetometers and a Novatel 12 channel GPS base station which was set up at the base of operations for differential post-flight corrections.

Eighty two flights (including test and calibration sorties) were required to complete the survey block. A total of 37,999 line kilometres of high resolution magnetic data were collected, processed and plotted. The traverse lines were flown at a spacing of 400 m with control lines flown at a separation of 2400 m. Nominal terrain clearance was specified at 100 m above ground.

Organization: Government of Yukon | Gouvernement du Yukon