Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Production Start | ... |
Mine Life | 2030 |
Williamson mine has become one of the world’s most important source of large pink diamonds.
Production at Williamson was going well until a Tailings Storage Facility failure in November 2022. After the failure, all production activities were stopped. There were only minor injuries and no loss of life. The focus for the next seven months was on fixing the problem, building a new storage facility, and doing necessary maintenance. These actions allowed Petra to start operations again in early July, ahead of schedule. The mine is expected to reach full production by the second half of fiscal year 2024. |
Source:
p. 4
Company | Interest | Ownership |
Government of Tanzania
|
25 %
|
Indirect
|
Petra Diamonds Ltd.
|
75 %
|
Indirect
|
Williamson Diamonds Ltd.
(operator)
|
75 %
|
Direct
|
Petra: 75%;
the Government of Tanzania: 25%.
After completion (expected in H1 FY 2023) of the Framework Agreement and MoU with Caspian, Petra will hold an effective 31.5% interest in the Williamson mine, with the Government of Tanzania holding 37% and Caspian Limited holding 31.5%.
Contractors
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Summary:
The mine is an open pit operation based upon the 146 hectare Mwadui kimberlite pipe, which is the world’s largest economic kimberlite to have seen continuous mining.
Despite having been in operation since 1940, the pit is only 95 metres at its deepest point due to the large size of the deposit. The low grade of the deposit is countered by the high value of its diamonds and lends itself well to high volume, bulk mining methods.
Summary:
The mine is an open pit operation based upon the 146 hectare Mwadui kimberlite pipe, which is one of the world’s largest economic kimberlites.
Despite having been in operation since 1940, the pit is only 105 metres at its deepest point due to the large size of the deposit. The low grade of the deposit is countered by the high value of its diamonds and lends itself well to high volume, bulk mining methods.
Source:
Summary:
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Source:
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Reserves at June 30, 2023:
Resource bottom cut-off: 1.15mm.
Reserve bottom cut-off: 1.15mm.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained carats |
Probable
|
37.4 Mt
|
Diamond
|
7 cpht
|
2.63 M carats
|
Indicated
|
60 Mt
|
Diamond
|
4.9 cpht
|
2.92 M carats
|
Inferred
|
954.5 Mt
|
Diamond
|
3.6 cpht
|
34.58 M carats
|
Total Resource
|
1,015 Mt
|
Diamond
|
3.7 cpht
|
37.5 M carats
|
Corporate Filings & Presentations:
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