Yarri Project


The Yarri Project comprises 31 granted licences and applications, including two awaiting ballot, covering approximately 1,405km2. The Project is approximately 150km northeast of Kalgoorlie between the Keith-Kilkenny Tectonic Zone (KKTZ) and the Laverton Tectonic Zone (LTZ).

Yarri Project - Tenement Location

Hobbes Prospect

The Hobbes Prospect is within Licence E31/1117 (OreCorp 80%) covering a portion of the Edjudina Greenstone Belt, Pig Well Graben and north-northwest trending KKTZ within the Kurnalpi Terrane of the Archaean Eastern Goldfields Province. The gold mineralisation within the licence is preferentially hosted within the older volcaniclastic, andesite and carbonated mafic units commonly associated with  porphyry intrusives. 

Historical drilling intersected primary mineralisation beneath the supergene zones. OreCorp completed a maiden reverse circulation (RC) drilling program of 17 holes at the Hobbes Prospect designed to confirm and test the strike length, depth potential and lateral continuity of both the supergene and primary gold mineralisation and returned encouraging results. Better intercepts include:

  • HOBRC0001      12m @ 1.49g/t gold from 58m; Incl. 4m @ 3.39g/t gold from 64m
  • HOBRC0002      22m @ 3.22g/t gold from 45m
  • HOBRC0009      9m @ 2.85g/t gold from 176m; Incl. 3m @ 5.13g/t gold from 182m (end-of-hole)
  • HOBRC0014      30m @ 1.08g/t gold from 47m; Incl. 14m @ 1.25g/t gold from 47m and 8m @ 1.27g/t gold from 68m

Gold mineralisation at Hobbes is typically hosted within a shallow, sub horizontal supergene blanket generally 45-65m below surface with a vertical thickness up to 30m (using a 0.25 g/t lower cut). This blanket lies above primary mineralisation, hosted in subvertical north-northwest striking structures in chlorite-carbonate-silica altered intermediate epiclastic volcanic rocks.

The drill program outlined broad zones of supergene mineralisation at least 1km along strike and >400m across strike and open in all directions.

Hobbes Prospect - Drilling

Hobbes Prospect - Drilling

Hobbes Prospect - Cross Section

Statesman Well Prospect

At the Lake View licence (E31/1225), Solstice has undertaken compilation of historical exploration information and has identified significant drill results at the Statesman Well prospect. The prospect appears to have been first drilled by Tyson Resources Limited (Tyson) between 1986 and 1990. During 2012, Saracen Gold Mines Pty Ltd completed 24 RC holes (SWRC001–SWRC024) for 1,740m of drilling and reported that anomalous gold mineralisation was intersected in all the holes, with a peak individual sample result of 7.18 g/t Au (14–15 m) in SWRC022. Some of the more encouraging results from the drilling included:

  • SWRC004      5m @ 1.25g/t Au from 21m
  • SWRC010      7m @ 1.32g/t Au from 31m
  • SWRC018      10m @ 1.63g/t Au from 58m

The gold mineralisation at Statesmen Well prospect occurs for at least 900m along strike and is open to the north and south.Choirboy Prospect

Choirboy Prospect

The Choirboy Prospect is located within E39/1914 and is associated with a mylonitic shear zone defined by tectonic cherts and quartz veins within a sequence of felsic metasedimentary schists, graphitic and sulphidic shales.  Historical drilling, including 14 RC holes and 74 RAB holes, on nominal 100m line spacing, has defined a north-south mineralised zone interpreted by previous operators as dipping shallowly to the east, over a strike length of >800m. Better RC intercepts (using a 0.5g/t cut off) include:

  • CBP001      8m @ 1.66g/t Au from 0m
  • CBP007      4m @ 3.66g/t Au from 42m
  • CBP008      15m @ 0.95g/t Au from 61m
  • CBR014      2m @ 5.07g/t Au from 47m
  • CBR022      12m @ 1.31g/t Au from 25m

Results from systematic rock-chip sampling completed by OreCorp are encouraging and correlate closely with the gold mineralised zones in historical drilling. Fifteen samples with grades > 1.0 g/t Au (range 1.04–19.65 g/t Au) defined a continuous Ridge Zone of high grade gold mineralisation over 320m of strike and up to 16m width. A high grade sample of 3.56 g/t Au was returned from a sample line 250m south of the Ridge Zone, which defines discontinuous gold mineralisation with a strike length of up to 570m. Gold mineralisation is variably associated with the fault-breccia, chert and volcaniclastic schist units.

Choirboy Prospect - Rock Chips

The Gap Prospect

Located approximately 1.3km northeast of Choirboy within E39/1914 and comprises of a series of prominent parallel banded iron formation (BIF) ridges that strike north-northwest, intercalated with a quartz-mica schist and subordinate amounts of mafic schist. Strongly silicified fault-breccia with abundant quartz veining, sub-parallel to bedding, occurs along the crest of the western most BIF ridge.

Selective rock chip sampling in 2020 identified anomalism (>1.0g/t gold) over ~180m of strike. This was followed up with a systematic rock chip sampling program over the original zone of gold anomalism and its potential strike extensions. Best results for the follow-up sampling included 2.40g/t and 0.61g/t gold, further highlighting the gold mineralisation potential of The Gap Prospect.

Jericho Prospect

Located within P39/5600, the Jericho prospect is an early stage target defined by a semi-continuous gold-in-soil anomaly covering an area of 1,200m x 100m, peaking at 522ppb Au. The anomaly predominantly overlies felsic metasediments and volcaniclastics to the east and west of a prominent BIF ridge which trends north-northwest and dips steeply to the east. The anomaly has been lightly tested by 14 RAB holes on ~200m line spacing, with maximum downhole intercepts of 1m @ 1.7g/t Au and 1m @ 1.3g/t Au in holes RCRB0059 and RCRB0038 respectively.

Yarri Regional

Regionally within the Yarri Project area systematic geochemical surface sampling programs have been undertaken over a number of the exploration licences. The regional sampling programs targeted gold-prospective areas and utilised the UltraFine fraction (UFF) assay method to identify gold and multi-element anomalies. Several anomalous gold-in-soil zones have been defined within the Cosmo licence (E31/1175), Lucerne Well licence (E31/1150) and Kingsley Prospect within the Horse Rock Bore licence (E31/1121).

Data from the surface geochemistry will be used for development and prioritisation of gold targets for drilling.

Image Gallery

site by café media