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TABLE 1.—Chemical composition in weight percent
Constituent
Fe
Ni
Co
FeS
SiO2
.
TiO2
.
A12O3 ......
Cr2
FeO
Fe 2
MnO
MgO
CaO
Wa20
K20
P 2°5
H20+
H20-
C
Total
Total Fe
Atarra Cranganore Karkh
6.87
1.63
0.06
6.91
38.70
0.12
2.26
0.52
lU.32
—
0.31
25.01
1.60
0.92
0.10
0.23
0.27
0.11
0.02
99.96
22.39
Kutt ippuram
6.1+2
l.Ul
0.06
l.kO
38.75
O.lU
2.11
0.50
15.U5
—
0.31
23.62
1.89
1.01+
0.11+
0.12
0.27
0.06
0.0U
99.73
23.10
Mabwe Khoywa
6.1+3
1.23
0.06
6.58
39.U7
0.12
2.U0
0.55
11+.36
—
0.31
21+.1+8
1.83
0.93
0.10
0.21
0.80
0.09
0.19
100.ik
21.77
Mirzapur
6.88
1 . 1 + 1
0.07
1+.55
1+0.51
0.11
2.3I+
0.1+6
lU.1+2
—
0.31+
25.26
1.72
1.02
0.10
0.21
0.00
0.11+
0.16
99-70
20.98
Segowlie
1+.16
1.22
0.01+
6.31
39.05
0.16
2.30
0.51
11+.36
3.03
0.33
2U.3I+
1.67
0.96
0.13
0.20
0.35
0.21+
0.06
99.J+2
21.1+5
Sultanpur
6.39
1.20
0.06
5.38
39.90
0.16
2.07
0.51
16.25
—
0.35
21+.21
1.75
0.90
0.10
0.18
0.19
0.11
0.01+
99.75
22.1+U
7.12
1.1+1
0.06
5.37
39.58
0.11+
1.76
0.51+
11+.07
0.31+
21+.87
07
ok
12
23
12
0.10
0.61+
100.58
21.1+1+
7.37
1.29
0.06
5.02
39.56
0.11+
2.32
0.51+
11+.06
0.31
21+.68
1.75
1.00
0.11
0.26
1.21
0.17
0.90
100.75
21.1+9
TABLE 2.—Abundance and average composition of major silicate phases
Constituent
Atarra
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Cranganore
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Karkh
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Kuttippuram
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Mabwe Khoywa*
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Mirzapur
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Segowlie
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Sultanpur
Olivine
Pyroxene 1
Pyroxene 2
Plagioclase
Mode
Vt.%
33.
18.
8.
1.
37.
19-
6.
9-
33.
26.
-6.
3.
35.
27-
5.
8.
39.
-25
-7 1.
35.
25.
5.
2.
37.
17-
5.
5.
36.
22.
5.
5.
1+
0
8
1
8
8
0
0
9 0
9
0
1+
5
0
1
1+
9
1
0
7
9
6
9
8
3
0
1
6
9
FeO
21.1+
13.7
5.0
-
22.8
Ik
5.3
-
-23
Ik.6
-8.2
-
22.1+
13.6
5
-
-21
-11+
_
-
22.9
13.6
1+.3
-
23.2
1U.3
k.8
-
21+.3
ik.3
5.2
-
CaO
_
0.1
22.1
2.0
_
0.8
20.8
2
_
1.0
-16.1+
2.0
_
0.9
21.1+
2.2
_
-0.7
-
-2
_
1
22.2
1.9
_
0..8
22.3
2.0
_
1.1
22.1+
2.2
MgO
39.6
29.7
17.*+
-
38.8
29
16.9
-
-39
28.8
-20.5
-
39
29.1
16.7
-
~ko
-29
-
-
38.6
28.6
18.1
-
38.8
28.8
17.8
-
36.8
28.3
17.6
-
SiO2
38.6
55.7
51+.2
65.2
38. k
55-7
56.1+
65.2
38.8
56
-55
65.3
38.6
56.6
55
65.O
-39
-56
-
-
38.2
56
5U.9
66
38
55.8
5U.9
65.6
38.9
56.1
5I+.8
65.O
Al,
_
-0
0
21
-0
0
21
-0
~0
21
~0
0
22
-0
0
21
0
0
21
0
0
21
°3
.2
.8
.8
.2
.6
.8
.3
.7
.7
.2
.7
.7
.1
.6
.2
.2
.6
.8
.2
.6
.3
Na
0
10
10
10
0
9
10
10
10
2°
_ _.5
.2
-
-
-
.2
-
_
-
.2
_
-
.6
.8
_
_
-
-
-
_
-
.1
-
-
-
.1
_
-
-
.5
K20
_
_
_
1.1
-
-
-
1.1
-
_
-
1.0
-
-
(TiO,
1.0 '
-
_
-
-
-
_
-
0.7
- -
-
1.0
-
-
-
1.0
MnO
-0.3 -
-
-
-0.2
-
-
-
-0.3
-
-
-
-0.3
, 0.5)
-
-
-
-
-0.3 _
-
-
-0.3 -
-
-
-
-
-
*01ivine and pyroxenes variable, see description.