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Australia
Keysbrook Mine

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 Location:
20 km NE from Mandurah, Western Australia, Australia

  Address:
1424 Hopeland Road,
PO Box 86
North Dandalup
Western Australia, Australia
6207
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Heavy Minerals
  • Leucoxene
  • Zircon
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life9 years (as of Jan 1, 2021)
Keysbrook is known as one of the world’s largest leucoxene deposits.


Owners

Source: p. 3
CompanyInterestOwnership
Iwatani Corp. 100 % Indirect
The Keysbrook Mine and operating entity, Keysbrook Leucoxene Pty Ltd (KLPL), were acquired from MZI Resources Ltd (formerly the parent company of KLPL) by Doral Mineral Sands Pty Ltd on 1 July 2019.

Doral Pty Ltd is wholly owned by Iwatani Corporation of Japan. The Doral Pty Ltd includes Doral Mineral Sands Pty Ltd.

Contractors

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Deposit Type

  • Mineral sands


Summary:

The project lies within the Swan Coastal Plain, approximately 3 km west of the Darling Scarp (which is the surface expression of the Darling Fault). The Darling Fault separates the Precambrian Yilgarn Block sequences from the Phanerozoic strata of the Swan Coastal Plain. The fault has an estimated maximum displacement of 15 km and, as a result of erosion, lies approximately 1 to 2 km west of the present scarp.

The Swan Coastal Plain extends from the Darling Scarp to the Indian Ocean, and ranges up to 75 m above sea level. A narrow piedmont zone occurs at the base of the scarp comprising alluvial fans and remnants of two strand-line deposits: the Ridge Hill Sandstone and the Yoganup Formation. West of the piedmont zone lies an alluvial swathe up to 10 km wide, termed the Pinjarra Plain. The Pinjarra Plain, comprising the Guildford Formation, ranges in elevation from 6 to 50 m and is overlain to the west by a series of coastal sand dunes. The oldest of these sequences is the Pleistocene Bassendean Sand, which hosts the Keysbrook Mineral Sand Deposit.

The Guildford Formation is characterised by clay, loam, sand and gravel of alluvial origin, with variable laterisation and podsolization. The Bassendean Sand and Guildford Formation have a combined thickness of 10 to 15 m and unconformably overlie about 50 to 130 m of Creataceous Leederville Formation. In the western portion of the project area the Leederville Formation conformably overlies the Cretaceous So ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Keysbrook project covers a shallow orebody with an average depth of two metres, making it very simple to mine and rehabilitate.

Mining involves earthmoving similar to subdivision earthworks, using a small fleet of conventional excavators, front-end loaders, articulated dump trucks, dozers and graders.

First, top soil is removed and stored for rehabilitation. An excavator then removes the ore and stockpiles it next to the Mine Field Unit (MFU) for processing.

At the MFU, ore is mixed with water and passed over vibrating screens to remove coarse non-mineralised waste. The remaining mineralised ore is then pumped to the Wet Concentrator Plant (WCP) as a slurry.

Mining operations are daytime hours only, between the hours of 7am and 6pm. Ore processing remains a 24/7 operation, with the Mining Feed Unit (MFU) fed by ore from a stockpile during the night period.

Mining has changed from a combined effort of KLPL and contractor personnel and equipment to now solely contract mining using Pinjarra based earth moving company, Raywell Contracting. As a consequence of this change, many of the people employed by KLPL have been re-employed by Raywell Contracting.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits20202019 *201820172016
Leucoxene kt  ......  Subscription required  ......  Subscription required
Zircon Concentrate kt  ......  Subscription required *  ......  Subscription required  ......  Subscription required  ......  Subscription required
Heavy Minerals Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Leucoxene L88 kt 263010
Leucoxene L70 kt 281712
* Average annual production reported in 2019
Subscription required - Subscription is required.

Operational Metrics:

Metrics201820172016
Ore tonnes mined 4,018,346 t3,967,154 t2,522,311 t
Tonnes processed 3,397,436 t3,620,656 t2,385,321 t
Annual processing capacity 5.25 Mt
Annual processing capacity 135,000 t of heavy minerals concentrate

Reserves at June 30, 2018:

CategoryTonnage CommodityGradeContained Metal
Proven 53 Mt Heavy Minerals 2.2 % 1.2 Mt
Proven 1.2 Mt Zircon 11.8 %
Probable 4.6 Mt Heavy Minerals 2.1 % 0.1 Mt
Probable 0.1 Mt Zircon 10.7 %
Proven & Probable 57.6 Mt Heavy Minerals 2.2 % 1.3 Mt
Proven & Probable 1.3 Mt Zircon 11.7 %
Total Resource 78.2 Mt Heavy Minerals 2.2 % 1,710 kt
Total Resource 1,710 kt Zircon 11.8 %

Financials:

Units201820172016
Capital expenditures M AUD 14.7   13.7   35.7  
Revenue M AUD 42.5   39.6   17.3  
Pre-tax Income M AUD -29.8   -24.7   -12.7  



Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Quarterly Report 2018
Annual Report 2017
Annual Report 2016
Technical Report 2016
Year-end Mineral Reserves 2016
Corporate Presentation 2015
Fact Sheet 2015
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Subscription required - Subscription is required.

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