Australia

Dolphin Mine

Click for more information

Categories

Overview

Mine TypeOpen Pit & Underground
StatusActive
Commodities
  • Tungsten
Mining Method
  • Truck & Shovel / Loader
  • Post Pillar Cut & Fill
  • Bench stoping
  • Cut & Fill
Production Start... Lock
Mine Life... Lock
SnapshotIn August 2023, the Dolphin tungsten mine has officially re-opened, after being closed for three decades.

The redevelopment strategy envisions an eight-year open-cut mine followed by a six-year underground operation.

Owners

SourceSource
CompanyInterestOwnership
Group 6 Metals Ltd. 100 % Indirect
The Mining lease and Exploration License are 100% owned by Australian Tungsten Pty Ltd, a subsidiary of Group 6 Metals Limited (formerly King Island Scheelite).

Contractors

Lock

- subscription is required.

Deposit type

  • Skarn
  • Metamorphic
  • Intrusion related

Summary:

Scheelite skarn mineralisation has formed within the metamorphic aureole of the Carboniferous Grassy Granite where it is in proximity to the calcareous sediments and carbonates of the Lower Grassy Group. The Dolphin and Bold Head deposits are hosted in a similar stratigraphic sequence.

Mineralisation is hosted within a 100-200m thick sequence of complex skarn mineralogy with two main horizons known as B and C Lens both of 10-30m thickness separated by a similar thickness of skarn altered volcanic sediments. Skarn formation and mineralisation have occurred where carbonates come into direct contact with the intrusion, or adjacent to brittle faults intersecting the intrusion. Mineralisation in the Dolphin deposit is best developed within C Lens which has several distinct mineralogical components including a garnet hornfels, a pyroxene-garnet hornfels and banded pyroxene garnet hornfels. B Lens is an upper dolomite horizon which has been variably hornfelsed and metasomatised with sporadic mineralised pyroxene-garnet skarn.

The Dolphin deposit dips east to southeast at approximately 30° before steepening to 50° in proximity of the Decline Fault on the eastern margin of the deposit. The host stratigraphy is broadly folded by several southeast dipping open anticlines or vergence folds with wavelengths of a few tens of metres. Several major southeast and east trending normal faults associated with the folding cut the orebody into discreet fault blocks. The Northern Boundary Fault truncates the mine sequence to north juxtaposing the Lower Grassy Group against the Fraser Formation quartzite. The Mine Sequence is truncated to the south by the granite, the surface of which dips and plunges shallowly north and east.

Reserves

Lock

- subscription is required.

Mining Methods

Lock

- subscription is required.

Comminution

Crushers and Mills

Lock

- subscription is required.

Processing

Lock

- subscription is required.

Production

CommodityUnitsLOM (Projected)
WO3 M mtu 3.3
All production numbers are expressed as WO3 in concentrate.

Production Costs

Commodity production costs have not been reported.

Heavy Mobile Equipment

Lock

- subscription is required.

Personnel

Mine Management

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2024
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2024
....................... Subscription required ....................... Subscription required ........... Subscription required Subscription required Jan 10, 2024
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2024
....................... Subscription required ....................... Subscription required Subscription required Jan 10, 2024

Aerial view:

Lock

- subscription is required.