Coming from this question and the answer, a proposed genetic classification of minerals:
Endogenic: Magmatic, Metamorphic, Hydrothermal.
Exogenic: Supergene, Sedimentary.
My question is how would you describe minerals as chrysotile formed as an alteration product of mafic rocks in surface (weathering), or clays or oxydes formed in soils as diaspore, that forms in bauxites.
Could an alteration or weathering class be added to that classification?
From this other answer I would tend to say they can't be supergenic, but they are exogenic.
By contrast, a supergenic deposit is the result of remineralization and concentration of one mineral into another, different mineral; more ultra low-grade chemical metamorphism than sedimentary.
Perhaps as a mineral resulted from weathering, it should be included in sedimentary environment because weathering is a part of sedimentary cycle?
What is better?
- Sedimentary: bauxites.
- Weathering: bauxites.
- Alteration: bauxites.
- Supergenic: bauxites.