Phosphorus in Mesozoic intrusives in the region of the Seligdar apatite deposit

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Abstract

Phosphorus distributions are given for Central Aldan Mesozoic magmatites, mainly for the dike complex within the Seligdar apatite-carbonate ore deposit. The highest phosphate levels occur in the pyroxenites of the leucitite-syenite subassociation, but these rocks occur only on a restricted scale. The trachyte dikes have assimilated phosphorus from the surrounding apatite ores with the formation of an aureole of dike rocks anomalous in P2O5, including those in the upper structural level above the deposit. The assimilation is accompanied by calcitization in the dikes and by dedolomitization in the surrounding ores, where apatite calcite rocks are formed. -Journal summary

Original languageEnglish
Pages (from-to)41-49
Number of pages9
JournalGeochemistry International
Volume25
Issue number2
Publication statusPublished - 1988

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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