К вопросу о генезисе месторождений Первого Северного железорудного узла

Abstract

Research subject . This study was aimed at examining iron ore and ore-bearing strata in the Pervy Severny iron ore district in the Northern part of the Tagil depression. This area features several ore occurrences and three small industrial objects, which have been almost completely exhausted, namely the Pervoe Severnoe, Sukhodoyskoye and Peshchernoe deposits. Materials and methods . The research was based on the analysis of published materials and available production reports on the aforementioned objects, as well as the author’s own field observations and search for similar deposits in literature sources. Results . It has thus far been believed that magnetite ores were formed by contact-metasomatic interaction of Givetian limestone and the intrusions of dolerites and gabbrodiorites. However, the area under study is characterized by very few typical skarns. In addition, the ore bodies here are deposited in accordance with sedimentary and volcanic rocks. Iron ore deposits in the Lan-Dill Region in Germany seem to be the closest analogue, which suggests an alternative (volcanogenic-sedimentary) model of the formation of iron ore deposits in the Pervy Severny iron ore district. Conclusion . The use of the volcanogenic-sedimentary model allows search criteria to be specified, thus significantly increasing prospects of detection of new industrial iron ore deposits.