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Alteration of Hydrothermal Ore Deposits Short Course

June 4 @ 8:00 am - 5:00 pm


Alteration of Hydrothermal Ore Deposits 

A Guide to Mineralization

Hydrothermal alteration of rocks reflects the interaction of fluids, typically dominated by water, with rocks.  Alteration is a common feature in and around hydrothermal deposits, forming alteration haloes that can be significantly larger than the deposit itself. Such haloes are excellent targets for the exploration geologist. The mineralogy and chemical composition of alteration provide an indication of the proximity of mineralization and under ideal conditions, a vector towards mineralization. Therefore, recognition of the effects of hydrothermal fluids on their host rocks and the interpretation of these observations is one of the most important skills required by an exploration geologist.

The aim of this short course is to assist with field observations, focusing on mineralogical and textural features that can be seen with the naked eye or the hand lens.  An introduction to the identification of the most common alteration minerals will be followed by presentations covering typical alteration styles associated with major hydrothermal deposit types. A number of case studies will be presented, some of them also touching on the field of geochemistry, for example, the usefulness of multi-element soil geochemistry in the identification of hydrothermal alteration.

Details to Follow


June 4
8:00 am - 5:00 pm
Event Category:


Glenhove Conference Centre
52 Glenhove Rd, Melrose Estate
Johannesburg, Gauteng South Africa
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