Chemistry Reference
In-Depth Information
Al
2
O
3
wt%
20
Saint-Arnac suite (Agly)
Laouzas suite (Montagne Noire)
19
18
17
16
15
14
Orgaõs suite (Rio do janeiro)
Ansignan suite (Agly)
13
12
11
10
20
40
60
80
100
Fe/Fe + Mg%
Figure 3.13
Composition of the biotites of granitoids: Al
2
O
3
/X
Fe.
(X
Fe
=
100 Fe/(Fe
+
Mg))
diagram.
TiO
2
wt%
6
Ansignan suite (Agly)
5
Laouzas suite (Montagne Noire)
4
3
Orgaõs suite (Rio do janeiro)
2
Saint-Arnac suite (Agly)
1
20
40
60
80
100
Fe/Fe + Mg%
Figure 3.14
Composition of the biotites of granitoids: TiO
2
/X
Fe
(X
Fe
=
100 Fe/(Fe
+
Mg))
diagram.
Saint-Arnac suite (Agly): diorites- quartz-diorites
●
, granodiorites
⊕
, pseudoporphyritic granite ,
leucocratic granite Ansignan suite (Agly): norites
■
, charnockitic granite , white garnet granite
Laouzas suite (Montagne Noire): dark cordierite granodiorite
♦
,
d
ark cordierite granite
♦
, clear
biotite granite
♦
hololeucocratic granite with cordierite nodules
Orgãos suite (Rio de Janeiro,
Brésil): amphibole tonalites - granodiorites x, biotite granites +, pegmatites
.
