• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Cambodia
Okvau Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
56 km SW from Kaoh Nheaek, Cambodia

  Address:
1110 Hay Street
West Perth
Western Australia, Australia
6005
Phone  ...  Subscription required
Fax+61-8-9286-6333
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Cambodia
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon adsorption-desorption-recovery (ADR)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life7 years (as of Jan 1, 2017)
30 July, 2021 - Emerald Resources NL (ASX: EMR) (“Emerald”) is pleased to advise that it has reached practical completion of construction and commissioning of its 100% owned 2.0Mtpa Okvau Gold Mine. The successful commissioning of the sulphide float regrind circuit and commencement of hard rock sulphide ore feed marks the commencement of run of mine ore processing and normal operations. The processing plant has performed well to date and is expected to achieve full nameplate capacity within the coming weeks.
Latest NewsEmerald Resources NL: Okvau Gold Mine Ramps Up to Full Production     September 21, 2021


Owners

Source: p. 5
CompanyInterestOwnership
Emerald Resources NL 100 % Indirect
Renaissance Minerals (Cambodia) Ltd. 100 % Direct
Emerald, through its 100% owned Cambodian subsidiary company, Renaissance Minerals (Cambodia) Limited, holds a 100% interest in the Okvau Exploration Licence (and the adjoining O’Chhung Exploration Licence).

Deposit Type

  • Vein / narrow vein
  • Intrusion related


Summary:

The Okvau Deposit is largely hosted in a Cretaceous diorite intrusion emplaced within an upper Triassic metasedimentary host rock package. Gold mineralisation is contained in a north-east trending fracture set in a narrow off-shoot or apophyses from a larger diorite intrusion however extends beyond the diorite contact into the metasediments.

The Okvau deposit is interpreted as an “intrusion-related gold system”. It is hosted mostly in Cretaceous age diorite and, to a lesser extent, in surrounding hornfels (metamorphosed, fine-grained clastic sediments). Gold mineralization is hosted within a complex array of sulphide veins, which strike northeast to east-west, and dip at shallow to moderately steep angles, to the south and southeast. Mineralisation is structurally controlled and mostly confined to the diorite. The highest grade intersections generally occur at the diorite-hornfels contact.

Gold mineralisation is concentrated along a network of brittle/ductile shears and arsenopyrite-rich sulphide veins. The mineralized shears typically comprise 10 to 50 metre wide core of strongly altered, fractured, and/or sheared rock locally with a weak planar fabric, surrounded by 0.5 to 2 metre wide less intensely altered halos which retain relict diorite texture. Variably deformed pyrrhotite, arsenopyrite and/or pyrite-rich layers up to 10 metres wide also commonly occur in the core of the shears.

The greater width of the alteration haloes around the shears, and textural evidence of movement along the shears implies they, rather than the narrow veins, were the principal fluid conduits within the Okvau Deposit. Gold-bearing fluids presumably accessed the fracture mesh which hosts the auriferous sulphide veins via the more strongly altered shears.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Okvau Deposit will be mined via conventional open pit mining methods from a single pit which will be mined in stages to maintain a relatively constant mining rate whilst providing adequate ore for processing at consistent ore grades. Mining will be undertaken by drilling and blasting ore and waste with load and haul using mining contractors. The proposed core mining fleet is made up of 120 tonne class excavators and 91 tonne class mine haul trucks.


Crushing and Grinding


Processing

  • Flotation
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon adsorption-desorption-recovery (ADR)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

The Okvau process plant will have a nameplate throughput of 2.0Mtpa, with an availability of 8,000 hours per annum (91.3%) and a nominal capacity of 250 tonnes per hour (‘tph’). The process plant will be located to the east of the open pit and adjacent to the TSF.

The process design broadly comprises of the following:
- Primary Jaw Crushing
- Crushed Ore Stockpile and Reclaim System
- SAG Milling and Classification with Pebble Crushing
- Sulphide Flotation
- Flotation Concentrate Thickening
- Fine Grinding of Concentrate Through a Regrind Mill
- Pre-Leach Oxygenation of Concentrate
- Pre-Leach Thickening
- Leaching and Absorption of both Concentrate and Flotation Tailings
- Elution and Electrowinning
- Cyanide Detoxification of Tails.

Ore will be placed in various stockpiles on the ROM pad adjacent to the process plant and will be fed by front end loader with a blending strategy to maximise predicted gold rec ........

CommodityParameter

Production:

CommodityUnitsAvg. Annual (Projected)LOM (Projected)
Gold koz 106762
All production numbers are expressed as metal in doré.


Reserves at April 30, 2017:

CategoryTonnage CommodityGradeContained Metal
Probable 14.26 Mt Gold 1.98 g/t 907 koz
Indicated 15.11 Mt Gold 2.08 g/t 1,008 koz
Inferred 2.57 Mt Gold 1.61 g/t 133 koz
Total Resource 17.68 Mt Gold 2.01 g/t 1,141 koz


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 8, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 8, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Press Release 2017
Subscription required - Subscription is required.

News:

NewsDate
Emerald Resources NL: Okvau Gold Mine Ramps Up to Full Production September 21, 2021
Emerald Successfully Achieves Practical Completion at Okvau July 31, 2021
MACA wins $366m contract with Emerald March 13, 2020
MACA to extend Emerald relationship with $303m contract January 31, 2019

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2022 MDO Data Online Inc.