Chemistry Reference
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Table 1.7
Chemical compositions of garnets from eclogites from Atbashi metamorphic complex, Kirgyzstan (wt%)
.
Number of samples
L-12
L-13
Number of analyses
Component
L-12-4 (c)
L-12-5 (c)
L-12-6 (r)
L-12-14
L-13-22 (c)
L-13-23 (r)
L-13-24
L-13-32
SiO
2
36,31
37,18
37,96
37,61
38,00
38,41
38,81
39,24
TiO
2
0,126
0,073
0,048
0,049
0,064
0,022
1,06
0,02
Al
2
O
3
19,75
20,31
20,77
20,58
20,55
21,25
21,19
21,67
Cr
2
O
3
0,018
0,026
0,034
0,02
0,059
0,133
0,042
0,054
FeO
30,84
30,45
28,51
28,85
26,17
23,88
23,65
24,68
MnO
1,02
0,851
0,417
0,726
0,412
0,454
0,453
0,488
MgO
2,17
2,2
4,38
3,85
4,35
6,32
6,59
6,56
CaO
7,74
8,25
7,53
7,82
9,54
8,82
8,34
8,81
Na
2
O
0,035
0,038
0,043
0,027
0,042
0,014
0,03
0,029
K
2
O
N.d.
0,001
0,006
N.d.
N.d.
N.d.
0,004
N.d.
Total
98,01
99,38
99,70
99,53
99,19
99,30
100,17
101,55
Note: The analyses carried out done by the X-ray microprobe method on apparatus “Camebax-Micro” (analyst O. Khmel'nikova) in Analytical
Centre of UIGGM SB of USSR AS (Novosibirsk). (c) - core, (r) - rim.
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