As part of the geochemistry programme, a wide range of elements and compounds are measured in three environmental media: topsoil, stream water and stream sediment. Other samples collected but not routinely analysed include subsoil, vegetation and panned concentrate samples – these are available from the GSI archive on request.
1. Sampling 
- Composite sample from points and centre of 20 m x 20 m square
- Collection by hand auger to 20 cm and 50 cm depths
| 2. Preparation 
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3. Analysis 
| 4. Data Processing 
- Quality control
- Statistical analysis
- Mapping
- Interpretation
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Stream Sediment |
1. Sampling 
- In-situ wet sieving technique from small streams
- Collection of <150 µm fraction
| 2. Preparation 
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4. Analysis 
- Multi-element XRFS
- Precious group elements fire assay
| 3. Data Processing - Quality control
- Statistical analysis
- Mapping
- Interpretation
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1. Sampling 
- Collection of filtered water, <0.45µm
| 2. Preparation 
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3. Analysis 
- Multi-element ICP-MS
- Major ions IC
- Organic carbon
| 4. Data Processing - Quality control
- Statistical analysis
- Mapping
- Interpretation
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