Yeoval Porphyry gold-copper-molybdenum-rhenium project (100% Godolphin)


  • Existing JORC 2012 Mineral Resource Estimate of 12.8 Mt at 0.38% copper, 0.14 g/t gold, 2.2 g/t silver & 120 ppm molybdenum
  • Yeoval Project (EL8538) covers ~290 km², with over 60 historic copper-gold mine workings along 20 km strike length
  • Recent assessment of data highlights additional drilling required at Yeoval and Cyclops prospects
  • Typical porphyry Cu-Au style mineralisation at Yeoval with disseminated and vein-hosted chalcopyrite, molybdenite and bornite
  • Cyclops Prospect hosts significant copper-gold porphyry potential
  • Multiple exploration activities planned with drilling to commence during 2022


The Yeoval Project is located approximately 70 km northwest of Orange in central New South Wales. The tenement EL8538 covers an area of approximately 290 km². The area is underlain by granites, granodiorites and volcanics, and more than 60 historic mine workings occur within the project. These trend in a north-easterly direction along a 20 km strike length. The project also includes the recently granted neighbouring tenements EL8964 and EL8990.

The Yeoval Project area is readily accessible via sealed and unsealed roads and is adjacent to the Molong – Dubbo railway infrastructure. The Project area is within easy reach of the Mitchell Highway to the east.

A Mineral Resource Estimate was disclosed in the Godolphin Prospectus, 29 October 2019.


Previous owner Ardea Resources completed a Mineral Resource Estimate update in August 2019.

Table 1: Yeoval August 2019 Mineral Resource Estimate (JORC 2012)
Category Tonnes (Mt) Cu (%) Au (g/t) Ag (g/t) Mo (g/t)
Inferred 12.8 0.38 0.14 2.20 120
Total 12.8 0.38 0.14 2.20 120

Based on a 0.2% Cu cut-off

Refer to Godolphin Prospectus, 29 October 2019, for JORC statement


The Yeoval Project has numerous minor scale copper and gold historical workings, with the most significant workings located in the Yeoval, Cyclops and Goodrich Prospects.

The tenement (EL8538) covers an area of ~290 km², granted in 2017 to Ardea Exploration Pty Ltd. Godolphin is exploring for a large tonnage porphyry gold-copper system in the Yeoval area.

The Yeoval prospect is a typical porphyry copper system. The many gold-copper showings in the Yeoval district have been explored almost continuously since the 1960s, though mostly at shallow levels only. Previous explorers have included Noranda, BHP\Newcrest and CRAE.

Previous companies have explored a total of 38 prospects to varying degrees, with much of the work centred on the Yeoval and Goodrich prospects. Of these 38 prospects, 14 have been drilled, including 12 with RC drilling and 7 with diamond drilling. A total of 86 RC holes and 35 diamond drill holes have been completed.

Most of this exploration was carried out prior to the Discovery 2000 airborne magnetics and radiometrics becoming available for parts of the Lachlan Fold Belt including the Yeoval district.

Malachite Resources was the only explorer in recent years to hold all tenure over the Yeoval district, and over a five year period, Malachite conducted a comprehensive exploration program at Yeoval, mainly searching for porphyry style gold-copper deposits, but also high-grade gold vein systems (e.g. Thunderbolt).


Yeoval Project is located in the Cowra Zone of the Lachlan Orogen and contains Devonian granite and granodiorites of the Yeoval Batholith. East and north of the intrusive complex are Silurian and Devonian aged sedimentary and volcanic rocks.

A number of strike-extensive north-south trending fault structures have been mapped in the region, primarily in the Ordovician and Silurian lithologies lying to the east of the Yeoval Batholith. The Batholith itself trends northerly, in a general sense controlled by the north-south faulting. Internally, granodiorite, which forms the eastern third of the Batholith, trends north-north-easterly. Numerous north-westerly trending faults transect the Batholith. These structures also occur in the older lithologies in the south of the licence area.

Interpretation of the local geology has been aided by the regional airborne geophysical data, which was commissioned by the NSW Geoscience Mapping Accord and flown in 1991. Numerous northwest fault sets have been defined from mapping and aeromagnetic interpretation. Detailed magnetics flown by a number of companies have enabled enhancement of the geological and structural interpretation of the Yeoval area.

Copper, gold and other base metal mineralisation is widespread in the region and the main mineralisation styles include Porphyry style gold-copper mineralisation associated with Devonian calc-alkaline intrusions e.g. Yeoval, Skarn mineralisation hosted by mafic units in the Cuga Burga Volcanics, low sulphidation epithermal gold mineralisation in Middle Devonian volcanics and structurally controlled quartz-copper ± gold vein mineralisation in Ordovician to Devonian sedimentary rocks and volcanics.

The mineralisation style is considered to be a porphyry gold-copper style and consists of chalcopyrite, bornite and molybdenite veins.