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Australia
Glenburgh Project

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 Location:
250 km E from Carnarvon, Western Australia, Australia

  Project Contacts:
Level 1, 41-47 Colin Street
PO Box 1449
West Perth
Western Australia, Australia
6005
Phone  ...  Subscription required
Fax+61 8 9481 0411
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageFeasibility
Mine TypeOpen Pit / Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Gravity separation
  • Carbon in leach (CIL)
  • Solvent Extraction & Electrowinning
Mine Life4 years (as of Jan 1, 2013)


Owners

 
CompanyInterestOwnership
Gascoyne Resources Ltd. 100 % Direct

Deposit Type

  • Sedimentary


Summary:

Regionally the project lies in the southern Gascoyne Province adjacent to the northwest margin of the Yilgarn Craton. Geologically the province has been described as the high-grade metamorphic core zone of the Early Proterozoic Capricorn Orogen. The region comprises granitoid intrusions, gneiss domes, metamorphosed sedimentary rocks and remobilised Archaean basement gneiss.

The project overlies an east-north-east trending sequence of highly metamorphosed Lower Proterozoic rocks comprising variably quartz feldspar-biotite-garnet-magnetite gneiss, amphibolite, quartzite and calc-silicate. A prominent crustal scale north-east trending fault, the Deadman Fault, bisects the project area.

Gold mineralisation at Glenburgh was first detected by Helix Resources in 1994 from gold anomalism in regional stream sediment sampling and subsequent soil sampling which outlined a 20km long anomalous trend. Drilling principally by Helix and since 2010, Gascoyne Resources has discovered and extended a series of gold deposits with JORC Resources. Gold mineralisation at Glenburgh is somewhat enigmatic as a result of the high grade metamorphic host rocks; gold occurs in quartz- feldspar- biotite-garnet gneiss with a general observation of higher grades occurring in silica “flooded” zones.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Upon completion of the Glenburgh mining study, Kenmore Mine Consulting completed a number of conceptual mine schedules (for both open cut and underground). The aim of the schedules was to complete the mining in the most productive manner possible, while allowing selective ore blending strategies. The selected schedule allows for two excavators mining the open pits for approximately two years, then one excavator for the next year, while the underground is developed and mined in two years commencing in month 27 of the schedule.

In addition to the open cut optimisations and resulting mine designs, a conceptual underground development has also been designed for the high grade zones below the Zone 126 open pit. An underground mine design has been completed that results in an underground mining inventory of 426,000t @ 4.6 g/t. This adds significantly to the overall project mining inventory, in the final two years of processing.


Crushing and Grinding


Processing

  • Gravity separation
  • Carbon in leach (CIL)
  • Solvent Extraction & Electrowinning

Source: Subscription required

Summary:

The Study was completed by a number of independent consultants and investigated several options, based around a carbon in leach (CIL) treatment facility, processing approximately 1.2mtpa. The project includes a number of conceptual mill feed sources including eleven open pits at Glenburgh, a high grade open pit at the Egerton project (currently under option) and an underground development at the Zone 126 deposit at Glenburgh.

The metallurgical testwork showed that a relatively simple flowsheet can be adopted for the project. As a result, a number of second hand processing facilities are suitable for the project. While the company is yet to secure an option over a suitable facility, there are a number in Western Australia that are “fit for purpose” and the company is investigating a number of options.

Recoveries & Grades:

CommodityParameterAvg. LOM
Gold Recovery Rate, %  ......  Subscription required
Gold Head Grade, g/t 2
Subscription required - Subscription is required.

Projected Production:

CommodityUnitsLOM
Gold oz 316,000

Operational Metrics:

Metrics
Ore tonnes mined 4.9 Mt *
Stripping / waste ratio 8.1 *
Annual processing rate 1.2 Mt *
* According to 2013 study.

Reserves at December 31, 2013:

CategoryTonnage CommodityGradeContained Metal
Measured 32,100 t Gold 9.5 g/t 9,800 oz
Indicated 6.95 Mt Gold 1.75 g/t 390,000 oz
Inferred 14.2 Mt Gold 1.35 g/t 620,000 oz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold AUD 991 / oz *
C1 cash costs Gold AUD 909 / oz *
Assumed price Gold USD 1,350 / oz *
* According to 2013 study / presentation.

Operating Costs:

Units2013
Total operating costs ($/t milled) AUD 29.2 *
* According to 2013 study.

2013 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscription required
Initial CapEx $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
Total CapEx $M AUD  ......  Subscription required
Net revenue (LOM) $M AUD  ......  Subscription required
Subscription required - Subscription is required.

Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 23, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Technical Report 2013
Corporate Presentation 2011
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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