South Nechako Basin and Cariboo Basin Lake Sediment & Water Geochemical Survey (NTS 92N, 92O, 92P, 93A, 93B)
- Wayne Jackaman, Independent Consultant

Within the mountain pine beetle (MPB) infestation area of central BC there remains a significant gap in regional geochemical survey (RGS) coverage in the South Nechako and Cariboo Basins. Although this 18,000 square kilometre region was included in previous regional geochemical survey (RGS) stream sediment programs, subdued topography and poor drainage limited the availability of appropriate stream sites for sampling. South Nechako Basin and Cariboo Basin Lake Sediment Geochemical SurveyIn fact, large parts of the surveyed areas were not even sampled. As a result, previous sampling was limited to 385 stream sites and the average sample density is only 1 site every 47 square kilometres.

In order to expand existing first level sample density, the 2006 South Nechako Basin and Cariboo Basin Lake Sediment and Water Geochemical Survey involves the collection and analysis of samples from approximately 1350 lakes within parts of NTS map sheets 92O, 92P, 93A and 93B. Combining these new sites with the existing RGS sites will increase sample density within the study area to one sample site every 10 square kilometres.

This survey will provide access to new regional drainage sediment and water geochemical information in an under explored and poorly understood region of the MPB infestation zone. The work will significantly enhance existing geochemical information, and compliment other ongoing geoscience initiatives and future projects.

Final survey results will be compiled into an RGS style data package that will include survey descriptions and details regarding methods; analytical and field data listings; summary statistics; plus sample location maps and maps for individual elements. The publication will be released on CD as PDF files and will include all raw digital data files used in the production process. The package and MapPlace (www.mapplace.ca) digital data will be made available to the public in the spring of 2007.

Posters and Presentations
2007: South Nechako Basin and Cariboo Basin Lake Sediment Geochemical Survey (parts of NTS mapsheets 92 N, O, P, 93A & B)
- Mineral Exploration Roundup Poster (pdf, 14.1MB)

Technical Articles
2007: "South Nechako Basin and Cariboo Basin Lake Sediment Geochemical Survey (Parts of NTS 092N, O, P; 093A, B), Central British Columbia"
- Geological Fieldwork 2006, Report 2007-1 p.311-314 (pdf, 1.06MB)

Final Deliverables
Geoscience BC Report 2007-6
Regional Drainage Sediment and Water Geochemical Data South Nechako Basin & Cariboo Basin, Central British Columbia (parts of NTS 92N, O, P, 93A & B)


August 29, 2007 - Geoscience BC is pleased to announce the release of Geoscience BC Report 2007-6 "Regional Drainage Sediment and Water Geochemical Data South Nechako Basin & Cariboo Basin, Central British Columbia (parts of NTS 92N, O, P, 93A & B)", by Wayne Jackaman, which contains new lake sediment and water data covering over 16,000 square kilometers of previously un-surveyed ground in central BC, and represents a significant addition to the provincial geochemical database.

Survey results include information on sample site locations, field observations and analytical data and maps for a total of 1451 sample points. Each sample has been determined for a range of base metals, precious metals and path-finder elements using advanced multi-element analytical techniques.

Drainage sediment and water geochemical data provides valuable information on the abundance of base and precious metals in the environment. Survey results can be used to locate sources of mineralization as well as assist in the identification of underlying bedrock geology. This type of information is used by the mining sector to focus exploration activities into areas that are considered to be prospective for new discoveries.

Used in combination with other mineral exploration tools, detailed investigations of this new geochemical information will help identify areas of mineral potential and provide a greater understanding of the complex geological conditions associated with the survey area.

 


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