Volta basin, African Plate (original) (raw)

ⓘ Alunite

Formula: KAl3(SO4)2(OH)6

ⓘ 'Apatite'

Formula: Ca5(PO4)3(Cl/F/OH)

ⓘ Baryte

Formula: BaSO4

ⓘ Coronadite

Formula: Pb(Mn4+6Mn3+2)O16

ⓘ Cryptomelane

Formula: K(Mn4+7Mn3+)O16

ⓘ Diamond

Formula: C

References:

Chirico, P.G., Malpeli, K.C., Anum, Solomon, Phillips, E.C., (2010), Alluvial diamond resource potential and production capacity assessment of Ghana: U.S. Geological Survey Scientific Investigations Report 2010–5045, 25 p.

ⓘ Fluorapatite

Formula: Ca5(PO4)3F

ⓘ Gahnite

Formula: ZnAl2O4

ⓘ Galena

Formula: PbS

ⓘ Gibbsite

Formula: Al(OH)3

ⓘ Gold

Formula: Au

ⓘ Graphite

Formula: C

ⓘ Halotrichite

Formula: FeAl2(SO4)4 · 22H2O

Description: Recent formations on drill cores which intersected massive pyrite layers.

ⓘ Hematite

Formula: Fe2O3

ⓘ Hollandite

Formula: Ba(Mn4+6Mn3+2)O16

ⓘ Kaolinite

Formula: Al2(Si2O5)(OH)4

ⓘ Magnetite

Formula: Fe2+Fe3+2O4

ⓘ Muscovite

Formula: KAl2(AlSi3O10)(OH)2

ⓘ Muscovite var. Illite

Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2

ⓘ Planerite

Formula: Al6(PO4)2(PO3OH)2(OH)8 · 4H2O

ⓘ Plumbogummite

Formula: PbAl3(PO4)(PO3OH)(OH)6

ⓘ 'Psilomelane'

ⓘ Pyrite

Formula: FeS2

ⓘ Pyrrhotite

Formula: Fe1-xS

ⓘ Quartz

Formula: SiO2

ⓘ Siderite

Formula: FeCO3

ⓘ 'Smectite Group'

Formula: A0.3D2-3[T4O10]Z2 · nH2O

ⓘ Sphalerite

Formula: ZnS