Types of Bauxite

Bauxite deposits are commonly referred to by a number of different terminologies relating to either their mineralogy or geological formation.

Alternately they may be described by likening them to other well known deposits elsewhere around the globe.

According the to their mineralogy:

  1. Trihydrate or gibbsitic bauxite: consisting chiefly of gibbsite
  2. Mixed bauxite: typically consisting of significant proportions of both gibbsite and boehmite.
  3. Monohydrate bauxite: consisting mainly of boehmite or diaspore and
According to their geological formation
  1. Lateritic: formed in situ from weathering of aluminous parent rocks in tropical and temperature regions. Consisting mostly of gibbsite or a mixed gibbsite and boehmitecontent.
  2. Karst: partially transformed or transformed bauxite materials washed and accumulated in eroded limestone cavities where further transformation can occur. Commercially significant karst bauxites occur in Europe, the Middle East, China and Jamaica.
According to other well known deposits:
  1. Suriname type: a pseudonym for trihydrateor gibbsitic bauxite
  2. European type: composed mainly of boehmite
  3. Jamaica type: applied to very fine grained high-iron gibbsitic bauxite containing minor quantities of boehmite.
Source: World Bauxite Resources, USGS