Iron, titanium and vanadium ores
In Poland, during 50-70'es of 20th century, iron ores were exploited in several mines situated in the Częstochowa, Kielce and Łęczyca regions. Those were iron ores occurring in sedimentary rocks in the form of accumulations of siderite nodules and iron-bearing limonitic sands. Resources of the iron ores were crossed out of the registry of Polish mineral raw material deposits by decision of the Minister of Environmental Protection, Natural Resources and Forestry already in 1994 as not meeting economic criteria. Since that there has not been any economic iron deposit documented in Poland.
Deposits of vanadium-bearing magnetite-ilmenite ores occur in anorthosite complexes of the Proterozoic Suwałki mafic massif (north-eastern Poland) at depths from 850 to 2,300 m. The deposits became known thanks to an intense drilling exploration and appraisal drilling program launched in the 1970s. In order to classify the resources of the ores, special economic criteria were worked out and accepted in 1996. On the basis of these new criteria the ore resources of the Krzemianka and Udryń deposits were classified as subeconomic on account of low contents of metals, especially vanadium (0,26 - 0,31 % V2O5 at the average) and large depth of occurrence.
At present the magnetite-ilmenite ores appear to be of interest mainly as a raw material of vanadium. According to M. Nieć (2003)(1) evaluation the cut-off grade equivalent of V2O5 in economic ore should reach 0.73 % what constitute only 1 % of totally documented resources. However, large resources of shallow-seated or even exposed deposits of that type were recently discovered and proved in the Republic of South Africa and several other places throughout the world. This makes any attempt to develop the ore deposits of the Suwałki area difficult to expect in the foreseenable future and their classification as subeconomic deposits too optimistic under the present conditions. It should be added that any decision to start development of the Suwałki ore deposits would bring a very high risk of social and environmental conflicts. Therefore, the ores should be treated at present as an interesting geological object, without any practical value larger economical importance. If this is the case, it may be stated that there Poland does not have any iron ore deposits which could be the source of raw material for the steel industry.
A bog iron ore deposit of the Dębe Małe area is relatively small, with resources estimated at 8,000 tonnes. Its resources appear not useful as raw material for the steel industry but easily find other industrial uses, especially as adsorbent of H2S, CO2 and organic compounds of sulfur in cleaning combustion flue gases and in other environmental activities.
Prepared by: Stanisław Z. Mikulski
(1)Nieć M., 2003 – Ocena geologiczno-gospodarcza złóż wanadonośnych rud tytanomagnetytowych masywu suwalskiego. Gospodarka Sur. Min., t. 19 z. 2, str. 5 – 28. Wyd. IGSMiE PAN Kraków..