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Mercury contamination in permafrost in the Jean Marie River First Nation Lands (dehcho region)

Metadata

File Identifier: 12683_iso.xml
Metadata Language: eng; CAN
: utf8
Resource Type: Dataset
Responsible Party: Individual Name: Polar Data Catalogue Organisation Name: Canadian Cryospheric Information Network Role: Point Of Contact Contact Info: Voice: (519) 888-4567 x32689 Street Address: 200 University Avenue West, University of Waterloo City: Waterloo Province/State: Ontario Postal Code/ZIP: N2L 3G1 Country: Canada E-Mail Address: pdc@uwaterloo.ca
Metadata Date: 2016-04-01
Metadata Standard Name: North American Profile of ISO 19115:2003
Metadata Standard Version: 2009-01-01

Data Identification

Abstract: Freeze-dried, homogenized permafrost samples (sediment and peat) were analyzed for total Hg on a Milestone® DMA-80 Direct Mercury Analyzer using methods described in EPA method 7473 (U.S.EPA, 2007). The calibration detection limit was 1 ng/g. Every 10 samples, duplicate samples were analyzed (% deviation: 3.7 and 13.6, n=2). A certified reference material (CRM; MESS-3 (0.091 ± 0.009 mg/kg Hg) was analyzed at the start and end of the run (mean recovery: 93.0 ± 0.06, n=3). Blanks were analyzed at the start, end, and every 10 samples (mean: 0.08 ± 0.03 ng, n=4). Permafrost samples were collected on the field with a portable GÖLZ Earth-drill system and brought to the lab for analysis. Sieve analysis of grain size were performed following a specifically modified American Standard and Testing Method protocol (ASTM D422-63, 2000). The volumetric ice content was calculated by immersing the frozen sample, bagged in vacuum-sealed polybags, in a recipient to measure its volume (Vtot). The sample was then thawed and put in the oven to dry. The remaining dry material was immersed again to determinate its volume (Vsed). A log for each permafrost borehole was created by assembling laboratory photos of the cores. Borehole logs include maximal depths, grain size ratio and volumetric ice content (see Appendix 3 for all borehole log descriptions and data). These logs were used as supporting data for mapping. All analyses were performed for 4 permafrost sites and samples were collected at various depth. The data is stored in GIS (shape-file) and excel format.
Purpose: A first set of data evaluates the contribution of degrading permafrost to the mercury contamination of lakes and fish around Jean Marie River First Nation (JMRFN). Total mercury was analysed for 19 permafrost samples and can be compared to mercury contamination of fish and water of the same area (data collected by another project team and not included in these data sets). Other sets of data were developed to study the composition of permafrost and its content in ice, which gives information on the current conditions of permafrost and monitor its degradation. This allows to gain knowledge of the structure and current conditions of permafrost.
Language: eng; CAN
Citation:
Contact Info: Title: Mercury contamination in permafrost in the Jean Marie River First Nation Lands (dehcho region) Date: Date: 2016-04-01 Date Type: Publication Date Individual Name: Geo Cardinal Role: Principal Investigator Individual Name: Jean Marie River First Nation Role:
Point Of Contact:
Individual Name: Polar Data Catalogue Organisation Name: Canadian Cryospheric Information Network Role: Point Of Contact Contact Info: Voice: (519) 888-4567 x32689 Street Address: 200 University Avenue West, University of Waterloo City: Waterloo Province/State: Ontario Postal Code/ZIP: N2L 3G1 Country: Canada E-Mail Address: pdc@uwaterloo.ca Online Resource: polardata.ca
Topic Category: Environment and Conservation
Keyword Collection:
Keyword: Health Keyword: Mercury Keyword: Northwest Territories Keyword: Palsa Keyword: Peat Keyword: Permafrost Keyword: Thawing Associated Thesaurus: Polar Data Catalogue Thesaurus (Canada) Keyword: Jean Marie River, Northwest Territories, Canada
Spatial Extent:
West Bounding Longitude: -122 East Bounding Longitude: -120 North Bounding Latitude: 62 South Bounding Latitude: 61
Legal Constraints:
Access Constraints: Other Restrictions Use Constraints: Other Restrictions Other Constraints: Terms of Use of the Polar Data Catalogue: https://www.polardata.ca/pdcinput/public/termsofuse

Distribution

Distribution Format:
Format Name: Digital file Format Version: 1.0
Distributor:
Distributor Contact: Individual Name: Polar Data Catalogue Organisation Name: Canadian Cryospheric Information Network Role: Distributor Contact Info: Voice: (519) 888-4567 x32689 Street Address: 200 University Avenue West, University of Waterloo City: Waterloo Province/State: Ontario Postal Code/ZIP: N2L 3G1 Country: Canada E-Mail Address: pdc@uwaterloo.ca

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