ENMORE GOLD PROJECT (NSW)
The Enmore Gold Project (“Enmore”) is underexplored and remains highly prospective for identifying potentially economic high-grade gold mineralisation on known prospects, and for discovering new mineralised areas on the 135km2 exploration licence. Historic exploration at Enmore has largely focussed on the potential for locating and developing open-cut resources.
The Company is very encouraged by both the apparent high-grade potential, and the limited relevant systematic exploration testing of higher-grade gold reefs within the broader structural lodes.
Figure 1: Enmore Gold Project – Location Plan
The mineral occurrences at Enmore comprise structurally controlled orogenic style gold (± antimony) mineralisation. Two primary mineralisation styles have developed throughout the duration of a long-lived hydrothermal system, analogous to the Hillgrove gold-antimony deposit:
An early relatively low grade ductile silicified and sulfidic lode style mineralisation constrained within and generally parallel to mylonite zones formed on the major NE trending structures.
A later and higher-grade mineralisation associated with brittle deformation in dilational and rheologically controlled shoots often oblique to but constrained within the mylonite zones.
Gold is present both as free gold and in solution with pyrite and possibly arsenopyrite. Gold occurrences associated with late dilational events generally have a higher proportion of free gold and significantly higher gold grades than the lode style structures.
The main prospects on the Enmore goldfield (Bora Mine, Sherwood Mine, Sunnyside Mine) are defined by the presence of continuous lode style mineralisation over strike extents of up to 600m. Getty Oil Development Company concluded that structural preparation of the fault corridors which host these known lode structures may be as extensive as 2.6km strike on the Borah Fault and 1.5km strike on the Sunnyside-Melrose Fault. There is potential for development of additional lodes within the structurally prepared fault corridors.
The deeper drilling at Enmore has been relatively wide-spaced and has not adequately accounted for the expected limited strike extent of high-grade shoots or their oblique orientation to the host lode structure. High gold grades associated with quartz veins and breccias are interpreted to represent dilational shoots and have been returned in several deeper holes, particularly at the Bora Mine where the peak result from drilling is 4m @ 20.6 g/t from 92m, including 1m @ 58.0 g/t (BSD5).
ELECTRICAL GEOPHYSICAL TECHNIQUES HAVE BEEN A MISSED OPPORTUNITY
The lode and vein mineralisation styles identified at Enmore are ideally suited to definition using systematic 3D electrical geophysics techniques and model inversions. Use of electrical targeting techniques at Enmore to date has been limited to several discrete grids of IP conducted in 1983.