Mining Intelligence and News

Murchison Project

Click for more information



Mine TypeOpen Pit & Underground
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longhole stoping
Backfill type ... Lock
Mine Life... Lock
SnapshotThe Murchison Gold Project (MGP) involves a brownfield restart of mining at Andy Well and a greenfield start up at Turnberry and St Anne’s. Andy Well was previously permitted for mining and processing operations, and various licenses and permits remain in place. Turnberry and St Anne’s require new approvals prior to development. Based on the work completed to date and the information available, the Company is confident that approvals required for development will be granted.

Access to the Project is via the existing Andy Well mine gate from the Great Northern Highway.

1.0Mtpa CIL processing facility, TSF, offices, workshop, powerhouse and camp to be constructed at Turnberry.

Existing infrastructure at Andy Well including workshop, stores, powerhouse and 6km of UG development will be recommissioned for mining activities.

A haul road from Andy Well to Turnberry will be constructed on a granted Miscellaneous Licence (L 51/97) for ore haulage.
Related AssetAndy Well


Andy Well Mining Pty Ltd. (operator) 100 % Direct
Meeka Metals Ltd. 100 % Indirect
Andy Well Mining Pty Ltd, a subsidiary of Meeka Metals Limited, owns 100% of all Exploration Licenses, Mining Leases and mineral rights for the Project.



- subscription is required.

Deposit type

  • Porphyry
  • Vein / narrow vein
  • Hydrothermal


Project scale geology consists of Archean aged high Mg Basalt units intruded by north-south striking porphyry intrusives. These are cross cut by east-west striking Proterozoic dolerite dykes. The mineralized quartz vein cross cuts the Archean units but not the Proterozoic dykes.

The Yilgarn is divided into four broad tectonic terranes; the Narryer, Youanmi, Southwest and Eastern Goldfields Superterrane. The Project is located within the northern end of the Youanmi Terrane.

Andy Well
Andy Well is located at the northernmost end of the north-north easterly trending Archaean Meekatharra- Wydgee greenstone belt, within the Youanmi Terrane. The belt comprises a succession of metamorphosed mafic to ultramafics, felsic and sedimentary rocks interpreted to belong to the Norie Group formerly Luke Creek and Mount Farmer Groups.

The Andy Well local stratigraphy is comprised of a north-northeast striking, sub-vertical (~80º) dipping, Achaean volcano-sedimentary package. The stratigraphy youngs toward the West based on sedimentary textures and immobile element geochemistry of basalts. The local package follows a general transition from a basaltic subaqueaous lava sequence at its base which becomes mafic volcaniclastic dominated before transitioning to a siliciclastic sequence of agrillites and arenites to the west of the Great Northern Highway.

The gold mineralisation at Andy Well is orogenic shear hosted, narrow high-grade quartz reefs. Economic mineralisation has so far been identified within five parallel north-northeast trending quartz reefs; Wilber, Judy North, Judy South, Suzie and Jenny.

A geochemical affinity for basalt host rock/contact is also likely to be significant for mineralisation as grade is less abundant within sheared porphyry host rock.

Vein mineralogy is predominantly quartz-calcite-chlorite+/-fuchsite associated with minor disseminated pyrite with lesser amounts of chalcopyrite, galena and sphalerite. Gold is frequently visible and finely dispersed throughout laminated, breccia and massive quartz types as well as with a lesser pyrite and other sulphides. Gold grades within veining are in general above 30g/t, whilst grades outside of veining but within the mineralised envelope are in the order of <0.3g/t Au.

Mineralised veins are interpreted petrographically as a space-filling. During flow of the hydrothermal fluid through the open structure, slivers of altered wall were scavenged into the structure, and suffered replacement to form fine-grained fuchsite + chlorite in stylolitic trails. Ongoing mild deformation caused partial recrystallisation of the vein quartz, forming finer-grained sutured mosaics.

Historical production was principally sourced from the Wilber Lode, a sub-vertical slightly west dipping laminated quartz vein commonly 0.4 to 1.5m in width with a well-developed boudinage texture. It forms an extensive and largely continuous sheet of mineralisation, which is currently defined over 600m strike and 700m down dip, remaining open at depth.

Turnberry is located within the Gnaweeda greenstone belt, a narrow belt of Archaean volcano-sedimentary rocks up to 10 kilometres wide in the northern half and decreasing to less than one kilometre in the south, situated at the northernmost margin between the Achaean Murchison, Southern Cross, and Yeelirrie Provinces. The belt comprises a succession of metamorphosed mafic to ultramafic, felsic and metasedimentary rocks with minor felsic to intermediate intrusives interpreted to belong to the Norie Group formerly Luke Creek within the Murchison Supergroup.

Lithologies at Turnberry are dominated by dolerites with the best section of mineralisation hosted within a magnetic quartz dolerite which forms a discrete ‘double bullseye’ aeromagnetic anomaly. The magnetic dolerite is likely to represent a fractionated portion of a layered dolerite sill with a contribution of magnetite from alteration creating the anomaly within the hinge of the folded mafic. This mineralisation style is the most well developed at Turnberry as it hosts the highest and most consistent grades and widths.

The area is covered with transported colluvium to a depth of ~10-25m and is highly weathered with a depth to fresh rock of ~100m.

Mineralisation forms a 1.7km north-northeast trending gold anomalous corridor, which is broadly defined into three zones, Turnberry South, Central and North. Mineralisation is primarily hosted where shears intersect fold hinges (saddles) and limbs of felsic lithological boundaries. Vein and shear-hosted mineralisation are also present at the mafic contact, which tends to host narrow, high-grade gold. In other areas (e.g. outside of fold hinges or lithological contacts), Au mineralisation is controlled by the orientation of steeply, dipping veins within the shear zone.

Mineralisation can often be visually indistinct owing to several styles of mineralisation being present and manifested differently depending on the lithology of the host rock. There are several unrelated shearing and veining events, however gold is usually accompanied by an increase in disseminated pyrite.

Mineralisation at Turnberry South and Turnberry North has developed within felsic volcanics and porphyries with strong pervasive sericite-pyrite alteration, which hosts broad low grade gold mineralisation and local sporadic high grades. Vein and shear mineralisation is also present at the mafic contact which tends to host narrow, high grades with occasional visible gold in RC chips.

At Turnberry Central, gold is hosted within a broad alteration zone within a quartz dolerite unit. Gold is believed to occur on the flanks of an intense silica-albite-pyrite ‘core’ surrounded by distal chlorite and epidote alteration. Gold is associated with disseminated pyrite, which occurs at a background level of around 1% in un-mineralised magnetic dolerite and increases to up to 30% within the centre of the alteration zone. Gold bearing alteration is typically associated with 3-10% disseminated pyrite with moderate chlorite-magnetite+silica alteration and can occur on either side of the core of the altered zone.

St Anne’s
St Anne’s is located centrally within the north-south trending Archaean Gnaweeda greenstone belt. At St Anne’s, the belt comprises a succession of metamorphosed mafic to ultramafic, felsic and metasedimentary rocks with minor felsic to intermediate intrusives interpreted to belong to the Norie Group, formerly Luke Creek, within the Murchison Supergroup.

The St Anne’s area is covered with transported colluvium to a depth of ~20m and is highly weathered with a depth to fresh rock of ~100 to 160m.

The local geology and stratigraphy of St Anne’s from east to west, interpreted from portable pXRF analysis and geological logging, is comprised of an ultramafic base, sediments, a fractionated mafic package including ultramafic, dolerite and basalt overlain by felsic volcaniclastics. The stratigraphy dips steeply to the east and strikes north–northeast with a stratigraphy sub-parallel foliation.

Structural interpretation suggests a broad zone of shearing trends north-northeast at St Anne’s. Several northwest-southeast structures are interpreted from geophysics to crosscut the stratigraphy and appear to off-set stratigraphy regionally and mineralisation locally.

Mineralisation at St Anne’s forms an 800m north-northeast trending gold anomalous corridor, which occurs within a broad alteration zone logged by geologists and mapped by arsenic anomalism in pXRF analysis. Mineralisation is widespread and occurs within multiple mineralised envelopes, predominantly concentrated within the mafic rocks proximal to lithology contacts.



- subscription is required.

Mining Methods


- subscription is required.


Crushers and Mills


- subscription is required.



- subscription is required.


CommodityUnitsAvg. AnnualLOM
Gold oz 80,000663,000
All production numbers are expressed as metal in doré.

Operational metrics

Hourly processing capacity  ....  Subscribe
Annual processing capacity  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
Tonnes processed, LOM  ....  Subscribe
* According to 2023 study.

Production Costs

Total cash costs Gold AUD  ....  Subscribe
All-in sustaining costs (AISC) Gold AUD  ....  Subscribe
All-in costs Gold AUD  ....  Subscribe
Assumed price Gold AUD  ....  Subscribe
* According to 2023 study / presentation.

Operating Costs

OP mining costs ($/t milled) AUD 24.5 *  
UG mining costs ($/t milled) AUD  ....  Subscribe
Processing costs ($/t milled) AUD  ....  Subscribe
G&A ($/t milled) AUD  ....  Subscribe
Total operating costs ($/t milled) AUD  ....  Subscribe
* According to 2023 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscribe
Expansion CapEx $M AUD  ......  Subscribe
Sustaining CapEx $M AUD  ......  Subscribe
Total CapEx $M AUD  ......  Subscribe
OP OpEx $M AUD  ......  Subscribe
UG OpEx $M AUD  ......  Subscribe
Processing OpEx $M AUD 245.9
G&A costs $M AUD 54.2
Total OpEx $M AUD  ......  Subscribe
Royalty payments $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
EBITDA (LOM) $M AUD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscribe
After-tax Cash Flow (LOM) $M AUD  ......  Subscribe
Pre-tax NPV @ 5% $M AUD  ......  Subscribe
After-tax NPV @ 5% $M AUD  ......  Subscribe
Pre-tax IRR, %  ......  Subscribe
After-tax IRR, %  ......  Subscribe
Pre-tax payback period, years  ......  Subscribe

Required Heavy Mobile Equipment


- subscription is required.

EV - Electric


Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 4, 2024
....................... Subscription required ....................... Subscription required Subscription required Jan 4, 2024
....................... Subscription required ....................... Subscription required Subscription required Jan 5, 2024


- subscription is required.