Analysis of lake sediments and peat cores

Solicitation number NRCan-5000027475

Publication date

Closing date and time 2017/02/02 16:00 EST

Last amendment date


    Description

    Peats and lake sediments are natural archives of past environmental conditions. Detailed identification and characterization of the arsenic (As)-hosting minerals preserved in these archives can be used to understand and predict the transport and fate of As in terrestrial and aquatic systems.

    The deliverables of this request will help Natural Resources Canada (NRCan) to better understand how As is hosted in near-surface solid phase materials in northern ecosystems of the Yellowknife region, where approximately seventy-five years of gold mining and associated contamination obscures geochemical background. Peats and lake sediments have been collected from the Yellowknife region, Northwest Territories, and they will be sub-sampled for various analyses, including mineralogy. By studying the mineralogy of As, NRCan will be able to determine if solid phase As is geogenic or anthropogenic in origin, and thus characterize the environmental impact of past mining activity. Previous work has shown that the application of synchrotron-based techniques, scanning electron microscopy, and Mineral Liberation Analysis can be successfully used to distinguish As compounds known to have been emitted from historical stack emissions at Giant Mine, including arsenic trioxide and As-hosting maghemite and hematite, from arsenopyrite and other forms that are more likely to be natural in origin. Detailed micromineralogical analyses have also shown how post-depositional diagenesis can convert arsenic trioxide in lake sediments to less bioaccessible arsenic-bearing sulfide minerals.

    Contract duration

    Refer to the description above for full details.

    Trade agreements

    • No trade agreements are applicable to this solicitation process

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    Contact information

    Contracting organization

    Organization
    Natural Resources Canada
    Address
    580 Booth St
    Ottawa, Ontario, K1A 0E4
    Canada
    Contracting authority
    Pizzi, Len
    Phone
    905-645-0676
    Address
    183 Longwood Road South
    Hamilton, ON, L8P 0A5
    CA

    Buying organization(s)

    Organization
    Natural Resources Canada
    Address
    580 Booth St
    Ottawa, Ontario, K1A 0E4
    Canada
    Bidding details

    Full details regarding this tender opportunity are available in the documents below. Click on the document name to download the file. Contact the contracting officer if you have any questions regarding these documents.

    Tender documents
    Document title Amendment no. Language Unique downloads Date added
    000
    French
    0
    000
    English
    11

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    Summary information

    Notice type
    Advance Contract Award Notice
    Language(s)
    English, French
    Region(s) of delivery
    Ontario (except NCR)
    Region of opportunity
    Canada
    Procurement method
    Competitive – Selective Tendering

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