Biogenic magnetite formation through anaerobic biooxidation of Fe(II)

The presence of isotopically Light carbonates in association with fine-grained magnetite is considered to be primarily due to the reduction of Fe(III) by Fe(III)-reducing bacteria in the environment. Here, we report on magnetite formation by biooxidation of Fe(II) coupled to denitrification, This metabolism offers an alternative environmental source of biogenic magnetite.