| Title | Groundwater sampling methodology for mineral exploration in glaciated terrain using reverse circulation overburden drilling |
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| Author | Boyle, D R; Cox, D L; Vandebeek, R R |
| Source | Journal of Geochemical Exploration vol. 49, issue 3, 1993 p. 213-231, https://doi.org/10.1016/0375-6742(93)90046-o |
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| Year | 1993 |
| Alt Series | Geological Survey of Canada, Contribution Series 49792 |
| Publisher | Elsevier BV |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Subjects | hydrogeology; industrial minerals; metallic minerals; groundwater; groundwater surveys; sampling methods; exploration activities; exploration; mineral exploration; overburden drilling; bedrock aquifers;
glacial deposits; mineral deposits; sediment tracer techniques; piezometric levels |
| Illustrations | schematic diagrams; tables |
| Released | 1993 12 01 |
| Abstract | A technique to sample groundwaters in the basal sediment aquifers of regions characterized by thick glacial sediments using reverse circulation drilling has been developed together with a methodology
for carrying out detailed groundwater hydrogeochemical surveys aimed at discovery of sub-outcropping and deep-seated ore deposits. The method consists essentially of five steps, namely: ( 1 ) overburden drilling using a stable tracer dye to monitor
the effects of drill water input into the basal aquifer, (2) removal of the tricones from the drill bit to allow emplacement of the piezometer unit and injection of filter sand packs and bentonite seals, (3) development of groundwater in the basal
aquifer to remove drill water inputs, (4).emplacement of the piezometer unit and injection of the filter sand pack and bentonite seal, and (5) further development of the piezometer installation followed by sampling of basal aquifer groundwater and
measurment of piezometric heads. The piezometer installation and sampling procedures can be performed with a minimal amount of training by geological technicians either employed by mining companies or more generally by overburden drilling management
companies as part of their contractual agreement with a mining company. |
| GEOSCAN ID | 204172 |
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