Kryvyi Rih (UG) Mine

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Mine TypeUnderground
  • Iron Ore
Mining Method
  • Sub-level caving
Production Start... Lock
Mine Life... Lock
SnapshotAfter operating at various levels of capacity in 2022/2023 affected by various difficulties, ArcelorMittal Kryvyi Rih ("AMKR") is currently operating its mining and steel facilities at 45% and 30%, respectively. The Company cannot predict the duration of the idling or of lower production as it will depend on the remaining course of Russia’s invasion of Ukraine and the establishment of safe and stable operating and logistical conditions thereafter, as well as potential repairs of any damages sustained. The Russian army has also blocked ports in Odessa, complicating and increasing the cost of exports (including steel and iron ore) from Ukraine. The ongoing conflict, its impact on demand, logistics (with respect to both supply and delivery) and costs and any resulting further reduced production, sales and income at its Ukrainian operations caused the Company to record a $1.0 billion impairment charge in 2022 with respect to such operations.


ArcelorMittal SA 95.13 % Indirect
ArcelorMittal Kryviy Rih (operator) 100 % Direct
Kryvyi Rih (UG) mine is 95.1% owned by ArcelorMittal and is integrated into the ArcelorMittal Kryvyi Rih steel business as a captive mine.



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Deposit type

  • Banded iron formation


The iron ore deposits are located within the southern part of the Krivorozhsky iron-ore basin. The iron mineralization is hosted by early Proterozoic rocks containing seven altered ferruginous quartzite strata with shale layers. The major iron ore bearing units in the open pit mines have carbonate-silicate-magnetite composition. In addition, oxidized quartzite is mined simultaneously with primary ore but cannot be processed at present and is stored separately for future possible processing. Only the magnetite mineralization is included in the 2015 open pit iron ore reserve estimates. The underground mine is hosted by a ferruginous quartzite with martite and jaspilite.

The Kryvyi Rih Basin contains mostly Precambrian sedimentary-metamorphic rocks and is divided into three suites. The middle suite, with a thickness of up to 2,000 m, is the main ore-bearing formation. It consists of seven to eight seams of ferruginous quartzites (represented by hematites, magnetites, and mixed hematite-magnetite varieties) and schists. The average iron content is 30–40 percent in the ferruginous quartzites and 25–30 percent in the magnetite varieties (which compose 20 percent of the total quartzite reserves). Rich iron-ore bodies are dispersed throughout the ore-bearing formation. The ore is formed in columnar, lenticular, and pocket-like bodies that descend to a depth of over 1,000 m. In several places the bodies merge into large sloping ore beds. The rich ores are divided into magnetite, martite, and hematite-martite ores. The last two varieties have an average iron content of 63.7 percent and make up more than half of all reserves.

The iron-formation succession at Kryvyi Rih/Krivoy Rog consists of seven members having a total thickness of ~1300 m (Alexandrov, 1973).

It lies within the valley of the Ingulets River and its tributaries, the Saksagan and the Zheltaya, and extends in a NNE direction over an interval of about 100 km. The basin is developed within the crystalline basement of the Kurainian massif, comprising Archaean gneisses, granites, migmatites, amphibolites and schists exposed to the west and east of the 2200-2000 Ma Palaeoproterozoic Krivbass geosyncline. The Proterazoic Krivoi Rog Series within the Krivbass is divided into three sections:
i). a lower arkose-quartzite and phyllitic sequence, with a horizon of talc schists;
ii). a middle, ore-bearing ferruginous quartzite (banded iron formation - BIF) and slate sequence, which includes includes nine BIF horizons intercalated with quartz-sericite, chlorite-sericite, slates and microquartzites; and
iii). an upper, quartzite-sandstone-slate sequence with lenses of marble.

The Krivoi Rog Series is folded itno a complex synclinorial structure of synclinal and anticlinal folds with dips on the limbs of 45 to 80°, for the most part with a keel shaped synclinal closure plunging at up to 40° northwards. The limbs of the major synform has been intruded by Proterozoic granite and are cut by longitudinal faults or overthrusts, resulting in the ore-bearing units being segregated along the north-south strike of the basin to form the: i). southern-most Inguletsky, ii). the Saksagan or Main, iii). the Pervomaisk, iv). Annovsk, and v). the northern Zheltorechensk and Popel'nostovsk ore fields. The largest reserves of high grade ores are concentrated in the Saksagan ore field where the ore-bearing middle unit attains a thickness of up to 2000 m and contains up to eight BIF seams.

The BIFs (locally termed 'ferruginous quartzites') comprise magnetite, magnetite-hematite, and hematite varieties, the most economically significant being the unoxidized magnetite and magnetite-hematite varieties. The high grade ores consist mainly of iron oxides and hydroxides which form column-like, less commonly stock-, and lens-like, and more rarely layer-like segregations and bodies within the BIF units, the characteristics of which vary from location to location within the basin. This high grade ore was formed by the leaching of quartz and oxidation of iron silicates within the BIFs.



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Mining Methods


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Crushers and Mills

Milling equipment has not been reported.



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Iron Ore Mt  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe0.
All production numbers are expressed as lump & sinter.

Operational metrics

Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe0.9 Mt0.9 Mt0.8 Mt

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 Mar 26, 2024
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