Very common. Present in all three oxidation zones.
- 1st Oxidation Zone
- 2nd Oxidation Zone
- 3rd Oxidation Zone
As botryoidal masses in the third oxidation zone, on 46 Level (Gebhard, 1999).
Paragenetic and General Notes
Goethite is a common secondary mineral at Tsumeb. It seldom forms attractive specimens in its own right, but occurs as an accessory constituent with a diverse range of mineral species and in various parageneses.
Keller (1977) noted that goethite tends to form early in the supergene process, and he included it in two of his "Type I" parageneses (i.e. associations forming under relatively high pH conditions):
(1) Goethite >> duftite (I) >> cerussite >> duftite (II) >> dolomite
(2) Goethite >> wulfenite >> mimetite >> malachite
Goethite is reported to form pseudomorphs after the following minerals: schultenite (rare).