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Australia
Tower Hill Project (Leonora Operations - Gwalia)

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 Location:
1 km SW from Leonora, Western Australia, Australia

  Project Contacts:
Kane Street, Gwalia
PO Box 67
Leonora
Western Australia, Australia
6438
Phone  ...  Subscription required
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  • Overview
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  • Reserves
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  • Filings & News

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Overview

StagePre-Feasibility
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Ore Reserves for Tower Hill will be revised following the completion of a pre-feasibility study in Q1 FY23.

The study identified that open pit extraction was the best option for development.


Owners

Source: p. 14
CompanyInterestOwnership
St Barbara Ltd. 100 % Indirect
The Tower Hill project is 100% owned by St Barbara Limited.

Contractors

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Deposit Type

  • Vein / narrow vein


Summary:

Gold mineralisation at Tower Hill is hosted within a moderately (35 - 50°) east-dipping quartz vein package adjacent to the contact of granite and strongly foliated ultramafic rocks. Quartz-gold vein lodes strike north to north-northwest with strike lengths of up to 600 m and widths from less than a metre to a vein package with a horizontal width of up to 50 m.

The mineralised domain was defined by quartz veining, the granite contact and structural controls as well as gold grade.

Quartz-gold vein lodes strike north to north-northwest and dip moderately (30-50o) east with strike lengths of up to 600 m and widths from less than 1m to a vein package with a horizontal width of up to 50m. Mineralisation has been defined over a 1.1km strike length and has been tested to a maximum depth of approximately 525m below surface.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The prefeasibility study into Tower Hill and Harbour Lights made significant headway during the year with resource definition drilling to inform our resource models. The study identified that open pit extraction was the best option for development. This enabled the issuing of a maiden open pit Mineral Resource for Tower Hill during the year, increasing our gold resources in the province by 600koz.


Crushing and Grinding
Flow Sheet: Source

All Tower hill ore will be trucked to the Gwalia processing plant. The processing plant is located at St Barbara’s Leonora Operations and consists of a three stage crushing circuit and single stage milling circuit.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Combined production numbers are reported under Leonora Operations - Gwalia


Reserves at December 31, 2021:
Mineral Resources are reported constrained by a A$2,500/oz pit shell. Cut-off Grade 0.4 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Indicated 20,682 kt Gold 1.8 g/t 1,177 oz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 14, 2022
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Corporate Filings & Presentations:

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

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