| Title | Geochemical signatures of porphyry deposits in ground and stream waters: erosion, enrichment, and alteration |
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| Author | Kidder, J A |
| Source | 29th international applied geochemistry symposium; 2022 p. 38 |
| Links | Online - En ligne
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| Year | 2022 |
| Alt Series | Natural Resources Canada, Contribution Series 20220092 |
| Publisher | Association of Applied Geochemists |
| Meeting | International Applied Geochemistry Symposium; Vina del Mar; CL; October 23-28, 2022 |
| Document | serial |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf |
| Subjects | geochemistry; mineralogy; porphyry deposits; groundwater; streams |
| Program | Targeted Geoscience Initiative (TGI-6) Ore systems |
| Released | 2022 10 23 |
| Abstract | The dispersion of metals in ground and surface waters from hydrothermal mineral deposits has been shown to be an effective vector in mineral exploration and where water can be sampled, a tool to explore
where deposits are deeply emplaced or covered by post-mineral deposits. The atypical geochemical signatures (Mo, Se, Re, As, Cu) of porphyry systems are commonly reflected in water chemistry around mineral occurrences. However, the successful
application of hydrogeochemistry in mineral exploration requires an understanding of the geological and hydrological controls on metal dispersion in aqueous environments. Such variation can be introduced as a function of (but not limited to): (i)
aqueous chemistry; (ii) deposit weathering and extent of secondary enrichment; (iii) erosion; (iv) hydrology; as well as (v) development and extent of alteration. Understanding this variation is key to interpreting hydrogeochemical datasets in
different settings and establishing background thresholds. A multifaceted approach to hydrogeochemical mineral exploration, coupling trace elements and stable isotope geochemistry is the most effective vectoring approach. This talk presents recent
work undertaken at the Casino porphyry in the Dawson Range, Yukon, as well as presenting comparisons from studies globally, to provide a range of prospective hydrogeochemical signatures associated with expected geological scenarios. This talk aims to
highlight effective methodologies for exploration hydrogeochemistry. |
| Summary | (Plain Language Summary, not published)
The analysis of ground and stream waters containing dissolved metals from ore deposits is a useful mineral exploration method. The fate of metals in
waters varies according to hydrology and geology which can change the geochemical signature. |
| GEOSCAN ID | 330135 |
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