PJSC Severalmaz, in which ALROSA owns 99.6% of shares, is engaged in the development of Lomonosovskoye deposit in the Arkhangelsk Region. It is one of the Company’s key development projects.
Severalmaz develops Lomonosov primary deposit that consists of 6 kimberlite pipes with the total diamond resources over 115 million carats. Two pipes, Arkhangelskaya and Karpinskogo-1, are being developed now.
Commercial production of diamonds near the White Sea coast started in 2005, when the first module of the processing plant with annual capacity of 1 million tons of ore was put into operation at the Lomonosov Mining and Processing Division (MPD).
In 2014, Severalmaz commissioned the second module of the plant, increasing its capacity from 1 to 4 million tons of ore per year.
Share in ALROSA Group’s production totaled 5% in 2016.
The pipe was discovered in 1980; it is located in the Arkhangelsk region 100 km northeast of Arkhangelsk city. Open-pit mining started here in 2005. Current reserves of the pipe are sufficient to maintain diamond mining until 2033.
Diamond output in 2014 – 1.239 million carats
Ore resources inclusive of reserves – 87.327 million tons
The average diamond grade – 1.1 carats per ton
The pipe is located 750 m northeast of Arkhangelskaya pipe. Stripping operations at the pipe were held from 2009; diamond mining at Karpinskogo-1started in 2014. The estimated reserves will allow to maintain diamond mining at the pipe until 2033.
Diamond output in 2014 – 1.089 million carats
Ore resources inclusive of reserves – 22.501 million tons
The average diamond grade – 1.32 carats per ton