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.
Opening of the Arkhangelsk deposit was carried out in difficult conditions given the high water content in the surrounding rocks.
Building of the plant.
During the development of the Arkhangelsk open-pit mine, hydro-geological impact studies were given top priority.
Loading of overburden at the deposit.
Designers are at work.
First stage of the processing plant at the enterprise.
Open-pit mine at Arkhangelsk pipe of the Lomonosov MPE.
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