30km in diameter. Carbonatite, melilitite, nepheline syenite, trachyte, phonolite, basanite. Bauxite mining.
http://www.koeln.netsurf.de/~w.steffens/brazil.htm
Geochimica Brasiliensis (1995), 8: 179-214.
Lages complex consists of the following rock association : olivine melilitites, olivine nephelinites, basanites, phononephrites, nepheline syenites, porphyritic peralkaline phonolites.
Mineral List
42 entries listed. 34 valid minerals.
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