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Geoinformatics Exploration Inc.3D Modeling and near-mine exploration targets

at the Saulyak Mine, Ukraine

A summary presentation prepared for Eurogold LtdMay 2005


Stage One Saulyak Project

This presentation represents a short summary of some of the key findings of the Geoinformatics / Eurogold Saulyak Stage One project.

For more detailed information and further results please refer to the report.


Stage One Saulyak Project *Summary of project scope, aims and process*

• Conduct underground mapping and locate in 3D space.

• Understand the geometry of the main units and their relationship to mineralisation

• Provide training to Eurogold geologists on underground mapping techniques

• To establish a geometric framework for near-mine (in-mine) exploration

*For further details please refer to the detailed project report


Underground Mapping

3D representation of “factual” geology

• Detailed mapping focused on the main ore-zones including:

•Structure•Alteration•Lithology•Veins


Observations from Underground mapping

Geology, veining and alteration*

• SchistsChloritic and sericite schists are observed throughout the mine

• MarblesMassive foot wall marble(s) Occasional schistose marbles

• VeinsQuartz, CarbonateQuartz / Carbonate

• Alteration (from vein boundaries outwards)SilicifcationSericite-carbonate +- pyriteSericite – carbonate – chloriteChlorite – ankeriteChlorite – calcite

*For further details please refer to the detailed project report


3D geological modeling

Focus on main orezone between 498 and 468 levels

• The footwall marble

• The Trench marble

• Alteration zones

• Mineralised zones •498 Level

•468 Level


3D geological modeling

Focus on main orezone between 498 and 468 levels

• The footwall marble

• The Trench marble

• Alteration zones

• Mineralised zones


Implications for near-mine exploration targetingThe Gap Zone

•Mapping in the gap zone revealed normal faults off-set to the ore-body.

•The downthrown portion of this zone remains untested and forms a target beneath 498RL

Fault off-set. NW is down thrown

Wall Map

NW SE


Implications for near-mine exploration targetingTwo ore bodies not one!

• Previous interpretations linked ore bodies and marbles on the 468 and 498 levels with the surface trenching / outcrop of the mineralised zone.

• Geological mapping and modeling revealed that the marbles don’t line up. (possibly fault offset, or separate lenses altogether).

• Mapping in the access adit on the 498 level revealed a marble and alteration zone that probably represents the down-dip continuation of the trench marble and surface mineralised zone. In the 498 adit this has not been sampled and forms an exploration target.


Implications for near-mine exploration targetingSouthward Continuation of mineralisation

• On the 468 level, the geological modeling of the marble and the location of mineralisation shows a change in strike from NW-SE to N-S.

•This is consistent with plunges in modeled alteration zones.

•The southern most cross-cut has some of the highest grades on this level including 52g/t, 10g/t, 9.6g/t and this continuation has not been adequately tested.

• This change in strike has implications to the location of the stope definition drilling to be carried out shortly


SummaryAnd conclusions

• The Saulyak ore-body is complexly deformed, and previous studies have mis-interpreted the 3D geometry of the mineralised zones and the key structural / lithological units.

• Three new in-mine targets have been identified.

• In particular, this project recognised that there are two sub-parallel systems in the main part of the mine.

• It is paramount that the findings and models from this study are used in resource definition / stope delineation drilling to be carried out shortly.

• There is still a lot to learn about this system. Extensional exploration for continuations of the mineralised zones to depth, or the recognition of new mineralised horizons is contingent on:

successful validation of the the drill database. further 3D geological modeling that extends the in-mine model into extensional exploration areas constant collection of in-mine geological data when new areas become available. testing of hypotheses presented in this presentation as well as the report

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