The role of phoscorites in the minerageny of the Tomtor ore field
https://doi.org/10.31242/2618-9712-2022-27-2-195-206
Abstract
The Tomtor massif of ultrabasic alkaline rocks and carbonatites (UAC) is located in the northeast of the Siberian Platform. The massif is one of the largest UAC in the world and is associated with the unique deposit Tomtor with colossal resources of Nb and REE. Moreover, the Ongkuchakh deposit with apatite-magnetite ores (phoscorites) is located within the massif. The deposit contains more than 1 billion tons of iron in total and about 500 million tons of P2O5 with high concentrations of REE. The Tomtor massif represents an important economic and strategic facility for the development of the Russian Arctic. In this paper we demostrate the contribution of phoscorites to the minerageny of the unique mineralization. We have provided geological and geochemical characteristics of the carbonatite complex and phoscorites. XFA and ICP AES methods were used to study their compositions in comparison plex and horizons of the lateritic weathering crust that form the mineralization. The generally accepted opinion that the deposit was formed during the weathering of ore carbonatites is supported by the convincing facts proving the significant participation of phoscorites in the formation of Nb-REE mineralization in the supergene complex.
About the Authors
L. N. Baranov
NAC VGRE PJSC «ALROSA»
Russian Federation
Russian Federation
BARANOV, Leonid Nikolaevich, scientific researcher, Vilyuyskaya Geological Exploration Expedition
39 Lenina st., Mirniy 678174
A. V. Tolstov
Diamond and Precious Metal Geology Institute
Russian Federation
Russian Federation
TOLSTOV, Alexander Vasilievich, Dr. Sci. (Geology and Mineralogy), Academician of the Academy of Sciences of the Republic of Sakha (Yakutia), chief scientific researcher, Institute of Geology of Diamond and Precious Metals, Siberian Branch of the Russian Academy of Sciences
39 Lenin pr., Yakutsk 677000
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Review
For citations:
Baranov L.N., Tolstov A.V. The role of phoscorites in the minerageny of the Tomtor ore field. Arctic and Subarctic Natural Resources. 2022;27(2):195-206. (In Russ.) https://doi.org/10.31242/2618-9712-2022-27-2-195-206
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