Overview

Mine Type	Open Pit
Status	Active
Commodities	Diamond
Mining Method	Truck & Shovel / Loader
Production Start	...
Snapshot	RZM Murowa Limited managed to successfully complete and bring into production its Project Crown Jewel plant in the second half of 2022. The forecast production upside from the plant will however, only reflect subsequent to year end as focus in the current year was on stabilising and optimising the plant. There were no mining activities from the pits and material processed was obtained from the pre-mined low grade and tailings stock piles.

Deposit type

• Kimberlite
• Breccia pipe / Stockwork
• Vein / narrow vein
• Hydrothermal

Summary:

The Murowa Diamond deposit consists of a cluster of five kimberlite pipes and dykes. The pipes, labelled K1 to K5, lie between two structural features with a North-South trend. To the West is a doleritic dyke and to the east is a major shear zone.

The K1 pipe is considered to be part of a complex blow along a North-South system of kimberlite dykes of which the smaller K3, K4 and K5 bodies are a part of the local controls on K1 are of North-South orientation. However K2’s emplacement was more directly controlled by a reactivation along the shear zone.

The shape of the pipe of the K2 pipe, the eastern side of which is in direct contact with the shear, and the western wall which dips away to the west, is an inverted wedge. This shape is unusual for a kimberlite pipe and it is said almost certainly to result from a structural preparation of the ground. Detailed observation of some dyke contacts with the granite on the western side of K2 indicate that there was indeed some reactivation along the quartz shear occurring at the time of emplacement.

The geology of the Murowa kimberlite pipes is complex comprising of inter-mixing of kimberlite lithologies and different phases of emplacement. The country rock is veined, brecciated and/or metasomatised and fenitised with kimberlitic fluid phases at the kimberlite pipe contact (Moss, 2010). The K1 pipe (the main focus of this study) is modelled as a complex, steep sided multi-lobed kimberlite pipe. The contact zones around K1 vary in thickness, overall rock textures and the relative proportion of kimberlitic components.

Mining Methods

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Comminution

Crushers and Mills

Processing

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Production

Commodity	Units	2022	2021	2020	2019	2018	2017	2016	2015
Diamond	k carats	....	....	....	685	740	732	433	298

Operational metrics

Metrics	2022	2018	2017
Hourly processing capacity	....
Tonnes processed	....	1,018,776 t	876,130 t

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Sep 12, 2023
.......................	.......................		Sep 12, 2023

Employees	Contractors	Total Workforce	Year
......	......	......	2020
......	......	......	2019
......	......	......	2018
		......	2017