Minette ore, Egypt

Major Minerals:

Chamosite, haematite, limonite

Minor Minerals:

Manganese oxides and hydroxides

Trace Minerals:

Include pyrite, chalcopyrite, TiO2 minerals, magnetite


Concentrically banded chamosite-haematite ooids are cemented by limonite or by chamosite. Recrystalization of some ooids has produced radially oriented chamosite. Limonite is rhythmically banded and grows into open voids