Tuesday November 25, 2014

Moolart Well Gold Mine

 

Overview

Stage Producing 
Mine Type Open pit 
Mineralisation Laterite & oxide 
Plant type  Crush, grind, CIL 
Throughput  2.5mtpa 
Average grade  1.4g/t gold 
Recovery  >92% 
FY13 production  100 – 110koz 
FY13 cash cost A$540 – 590/oz1
Mine life  5 years 
Ore reserves  476koz2
Mineral resources  2.7Moz2

moolart-chart

The Moolart Well Gold Mine is located within the Duketon Gold Project, approximately 350 kilometres north, north-east of Kalgoorlie in Western Australia. The Company completed development of the Moolart Well Gold Mine in the September 2010 quarter on time and within budget.

The Moolart Well deposit is a large oxide gold deposit sitting within a deeply weathered Archaean ultramafic-mafic volcanic sequence above the base of weathering at about 70m vertical depth. Primary gold-sulphide mineralisation exists within quartz lodes and alteration zones beneath the weathered zone in fresh rock.
The deposit consists of two zones: a flat-lying laterite zone developed in an iron-rich weathering hard cap, and a deeper oxide zone developed in clays. These relationships are illustrated in the cross section below.
 

The Moolart Well Gold Mine is located within the Duketon Gold Project, approximately 350 kilometres north, north-east of Kalgoorlie in Western Australia. The Company completed development of the Moolart Well Gold Mine in the September 2010 quarter on time and within budget. 

The Moolart Well deposit is a large oxide gold deposit sitting within a deeply weathered Archaean ultramafic-mafic volcanic sequence above the base of weathering at about 70m vertical depth. Primary gold-sulphide mineralisation exists within quartz lodes and alteration zones beneath the weathered zone in fresh rock.

The deposit consists of two zones: a flat-lying laterite zone developed in an iron-rich weathering hard cap, and a deeper oxide zone developed in clays. These relationships are illustrated in the cross section below.

moolart-cross-section-in-page

Download Moolart Well Cross Section (PDF)

 

The laterite zone of mineralisation is covered by 6m of barren colluvial material and extends down to an average depth of 20 metres. Over the known 5km x 1.5km extent of the Moolart well mineralisation, the average mineralised laterite ore thickness is 3.8 metres, and the average colluvial cover is 6.4 metres.

As at 30 June 2012, the laterite has a reserve of 6.8 million tonnes at 1.31 g/t for a contained 285,000 ounces of gold above a cut-off grade of 0.5 g/t.

laterite-small

The oxide mineralisation extends from beneath the laterite cap at 20m down to the base of weathering at approximately 70m vertical depth. This zone contains a total reserve of 4.1 million tonnes at 1.41 g/t gold for 186,000 contained ounces of gold at a cut-off grade of 0.5g/t.

The Company continues to actively explore within the oxide zones to add to the reserve base of the project.

oxide-pit-diagram-small

 

Moolart Well Photo Gallery