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Mine TypeUnderground
StatusCare and Maintenance
  • Copper
  • Gold
  • Silver
Mining Method
  • Cut & Fill
  • Room-and-pillar
Backfill type ... Lock
Production Start... Lock
Mine Life... Lock
SnapshotTwo underground copper mines (Otjihase and Matchless) and an 800ktpa concentrator in Namibia on care and maintenance - operating until Sep 2015, producing high quality copper concentrate.

Mines and concentrator being maintained ready for immediate restart, with underground workings dewatered and ore faces accessible.

No production data is publicly available since mine acquisition by Bonohgroup Limited.
Related AssetsMatchless Mine, Otjihase Mine


Bonohgroup Ltd. 100 % Indirect
On 1 June 2018, Simon Kirkhope and Andrew Johnson were appointed as Joint Administrators of the Weatherly International plc.

Following no viable third party offers having been received and on the basis that a thorough marketing process had been run and a purchaser had not been found, the Administrators approved and accepted an offer received by Bonohgroup Limited, whose Director, John Sisay, is a person connected with Weatherly International PLC (“the Company”), to purchase the shares the Company held in WNSL, CARN and CARN Holding. CARN which held Berg Aukus and Weatherly (Namibia SL) LTD (St Lucia) “WNSL” which through Ongopolo Mining Ltd (Namibia) “OML” held the Tschudi mine, Central operations and the Tsumeb township and concentrator.

Exchange of contracts took place on 28 July 2020, following this on 2 September 2020 the share sale was completed and the shares in the Company’s subsidiaries were sold to Bonohgroup Limited (is a private company).

Deposit type

  • VMS


The Matchless Amphibolite Belt is a conspicuous narrow northeast-southwest trending sequence consisting of amphibolite, chlorite-amphibole schist, talc schist and metagabbro which extends over a distance of 350km in the Southern Tectonostratigraphic Zone of the Damara Orogen. The Matchless Belt represents a sequence of metamorphosed tholeiitic basalts, which are the product of submarine volcanism. Stratigraphically the Matchless Amphibolite Member occurs within the Kuiseb Formation (Khomas Subgroup) of the Damara Sequence, which is a metapelitic sequence of biotite schists, with subordinate calcsilicate rocks and carbonaceous schists.

The Matchless deposit comprises six echelon shoots namely the Eastern Prospect, East Shoot, West Shoot, River Shoot, Western Prospect and Western Extension, extending over a strike length of 2.5km from the east to the west in that order. The East Shoot, West Shoot and River Shoot form the old Matchless Mine. The mineralisation occurs in amphibolites and quartz-sericite schist lying between the Matchless Amphibolite and the Footwall Amphibolite, dipping at 30o , 350o towards the north and plunges to the northwest. The mineralised zones are distinct pyrite chalcopyrite occurring in a quartz mica schist. A slight angular discordance between the mineralised zone and the Matchless Amphibolite was mapped on outcrop. The mineralisation is strata-bound and is of a massive sulphide type containing mainly pyrite, pyrrhotite, chalcopyrite and minor sphalerite, gold and silver.

The Otjihase deposit comprises five sub parallel, spatula-shaped, mineralised zones namely Shoot A, Shoot B, Shoot 2, Shoot 3 and Shoot 4. Shoots A and B are known collectively as the Main Shoot in mine terminology because of their close proximity, but geologically they are separate entities. The shoots consist of massive sulphides composed primarily of chalcopyrite and pyrite, hosted in a magnetite rich quartzite. Of the five, only Shoot A is consistently mineralised and forms the bulk of the mineral resources.

With the exception of Shoot B, which is slightly elevated above the southern margin of Shoot A, the westerly-plunging mineralised shoots occur at approximately the same stratigraphic level and are separated by more than 150m of barren or weakly mineralised quartz-mica schists that dip north westerly at 16°.

The northern margins of the shoots are abrupt, whereas the southern margins are gradational, consisting of thin bands and lenses of mineralisation, or disseminated mineralisation, in the quartz-mica schist country rocks. The footwall contact between the lowermost mineralised band and the underlying quartz-mica schists is usually sharp. The hangingwall contact is often gradational due to the presence of zones of disseminated mineralisation.

Each of the shoots has a gossanous outcrop and extends down plunge for more than eight kilometres. The mineralised shoots are cut by a series of sub-vertical northerly trending normal faults that down-throw the shoots progressively deeper towards the west. The faults separate the deposit into a number of blocks (or compartments) named after the faults that occur along the western margin of each block.

The Otjihase deposit lies in quartz-biotite chlorite and quartz-biotite schists and consists of a shoot of massive and disseminated sulphides about 200m wide plunging to the west at about 6°. The deposit dips to the northwest at about 16°. The shoot thickness varies between 4m and 12m with an average between 6m and 8m. The hanging wall is a quartzbiotite chlorite schist with distinct schistosity which sometimes spalls. It is competent if supported. The declines and other development are usually excavated in competent quartzmica schists.

The mineralisation stretches from near surface to depths of 800m and more and is divided into compartments by north-south trending faults. These faults are water bearing and contain flowing material and are thus difficult to traverse.



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Copper Metal in concentrate t

Production Costs

Commodity production costs have not been reported.

Heavy Mobile Equipment

Fleet data has not been reported.


Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 19, 2024

Total WorkforceYear
...... Subscription required 2019


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