Geoscience Reference
In-Depth Information
a)
Ultrafelsic
Felsic
Intermediate
Mafic
Ultramafic
Kimberlite & carbonatite
U (ppm)
Th (ppm)
Th (ppm)
Th/U=1
10
6
10
6
10
6
Ilm/Rut
10
5
10
5
10
5
10
4
10
4
10
4
Zr
Zr
Zr
10
3
10
3
10
3
Sph
Rut
Sph
Sph
U/K=1
Th/K=1
10
2
10
2
10
2
Amp
Ilm
Biot
Amp
Biot
Mus
Biot
Amp/Pyx
Na Fsp
Pyx
10
1
10
1
Pyx
Mag
Na Fsp
10
1
Mag
K Fsp
Mag
O
Qtz
K Fsp
Qtz
Ol
Qtz
Na Fsp
Ol
10
0
10
0
10
0
Ca Fsp
K Fsp
Ca Fsp
100
50
0
Ca Fsp
10
-1
10
-1
10
-1
K (%)
10
-2
10
-2
Ilm/Rut
Mus
10
-2
Mus
Ilm Rut
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
10
6
Average crust
K, Th & U ore minerals
Common minerals
Data comprising (a)
K (%)
K (%)
U (ppm)
b)
Heavy mineral sands
U & Th ores
U (ppm)
Th (ppm)
Th (ppm)
10
6
10
6
Cof
10
6
Cof
Ura
Cof
Bra
Tho
Tho
Mon
Mon
10
5
10
5
10
5
10
4
10
4
10
4
Bra/Ura
Mon
Tho
Ura
10
3
10
3
10
3
Ura
10
2
10
2
10
2
Pyx
Zr
Mag
Qtz
10
1
10
1
10
1
Sph
Amp
Ol
Mus
Biot
Cof
10
0
10
0
10
0
Ca Fsp
10
-1
10
-1
10
-1
Na Fsp
Mon
Syl/Car
K Fsp
10
-2
10
-2
10
-2
Bra
Car
Syl
Bra
Car
Syl
100
50
Tho
0
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
10
6
K (%)
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
-3
10
-2
10
-1
10
0
10
1
10
2
K (%)
K (%)
U (ppm)
Figure 4.12
Radioelement content of igneous rocks and selected minerals and ores. Data compiled from numerous published sources. (a) Data subdivided according to lithotype and
geochemistry. (b) Comparison between various lithotypes, K, U and Th ores and heavy mineral sand deposits. Amp
-
amphibole, Biot
-
biotite, Bra
-
brannerite, Ca Fsp
-
plagioclase,
-
-
-
-
-
-
-
-
-
-
Car
carnallite, Cof
cof
nite, Ilm
ilmenite, K Fsp
potassic feldspar, Mag
magnetite, Mon
monazite, Mus
muscovite, Na Fsp
sodic feldspar, Ol
olivine, Pbl
pitchblende,
-
-
-
-
-
-
-
-
Pyx
pyroxene, Qtz
quartz, Rut
rutile, Sph
sphene, Syl
sylvite, Tho
thorite, Ura
uraninite, Zr
zircon.
Search WWH ::
Custom Search