neighbours, page-2

and this is what it looks like (thanks scout). Wasn't "hydothermal" mentioned in the last report

IOCG Deposits
Iron oxide-copper-gold (IOCG) deposits are a recently-recognized class of hydrothermal ore deposit that can be economically very significant. They have become an important target type in the portfolio of many exploration and mining companies. In fact the number of deposits classified into the IOCG category has increased dramatically in the past 15 years, as has the understanding of the genesis of this enigmatic deposit type.

IOCGs occur in a variety of geological settings around the world. Their mode of origin remains controversial, but they appear to be replacive. Some of the largest mineral deposits in the world are IOCGs. Examples include the huge Olympic Dam deposit in Australia which contains over 2.6 billion tonnes of ore grading 1.2% copper, 0.5g/t gold, 2.7g/t silver, and 0.4kg/t uranium oxide. Another important, world-scale example is the Kiruna iron deposit in Sweden which originally contained over 2Bt of magnetite.

Typical features of IOCG include:

* Copper-gold sulphide mineralization typically occurring with large concentrations of iron oxide minerals; mainly magnetite and hematite, as opposed to iron sulphides.

* They tend to be localized along subsidiary structures related to major, crustal-scale fault systems and are associated with widespread hydrothermal alteration.

* They appear to replace the host rock in which they are found.