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DOOLGUNNA PROJECT
The Doolgunna Project is located approximately 140km NE of Meekatharra and comprises of 10 exploration licenses covering an area of 1700km2. The primary exploration target is Volcanogenic Massive Sulphide mineralisation (VMS) within the Yerrida Basin.
The area was selected from the original interpretation of the Proterozoic Glengarry Basin which shows the Narracoota Volcanic Unit is folded around and to the south through the project area (fig 1). Subsequent Government interpretations show that the Glengarry Basin has been subdivided into three smaller basins, the Padbury, Bryah and Yerrida. The project is located within Yerrida basin.
The company is targeting the stratigraphy at the top of the Killara Formation directly below the Maraloou Formation where there has been a transition from volcanism to low energy subaqueous sedimentary deposition. Within the project area this contact is coincident with regional copper, gold, platinum and zinc stream geochemical anomalies.
The thickness of the Killara Formation is uncertain but is estimated to be approximately 1,000m and comprises mainly of intrusive and extrusive mafic volcanic with minor intercalations of volcaniclastics. The overlying Maraloou Formation comprises black shale and fine grained carbonate sediments and the basal contact with the underlying Killara Formation is gradational and characterised by intercalated black shale, mafic lavas and sills.
It has been interpreted by the company that during the formation of the target stratigraphy the potential exists for the venting of hydrothermal fluids onto the sea floor after passing through a thick sequence of mafic volcanic rocks (Killara Formation) scavenging copper and gold metal and depositing it in the form of massive sulphide within or near the vent.
In March 2010 the company completed a 727 line km helicopter-borne VTEM geophysical survey that covered approximately 10% of the entire project area. The interpretation of the results is currently underway with approximately one third of the survey area reviewed resulting in the identification of 15 target areas that warrant further follow-up (see Fig 2). It is anticipated that more anomalies will be recommended for further follow-up once the review of the remaining area is complete.
Also the company has received petrographic descriptions of rock chips taken from the target stratigraphy prior to the VTEM survey which confirmed the presence of felsic hyaloclasite & basaltic andesite lavas interbedded with sulphidic black shales, siltstones, quartz arenite and chert. This is important as is it demonstrates the target stratigraphy conforms to existing VMS models and is typical of rift settings. The petrology also identified both the basalt and the quartz arenite rocks have been subject to hydrothermal alteration.
The only historical drilling within the VTEM survey area are 22 RAB holes & 1 diamond hole. The diamond hole intersected interbedded shales, siltstones and quartz arenite intercalated with basalts and gabbro.
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 Figure 1
 Figure 2
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