表 2.6 球粒陨石的陨石
陨石类型 |
样品数 |
硅酸 |
||||||||
---|---|---|---|---|---|---|---|---|---|---|
SiO2 | MgO | FeO ④ |
Fe2O3 |
Al2O3 |
CaO |
Na2O |
K2O |
Cr2O3 |
||
普通球 |
100 |
38.29 | 23.93 | 11.95 |
— |
2.27 |
1.90 |
0.90 |
0.10 |
0.37 |
粒陨石 |
||||||||||
H |
45 |
36.41 | 23.09 | 8.87 |
— |
2.60 |
1.87 |
.93 |
.10 |
.33 |
27 |
36.52 | 23.48 | 8.87 |
— |
2 ( 43 |
1.82 |
.85 |
.14 |
.362(431.82 |
|
L |
55 ① |
39.70 | 24.58 | 14.33 |
— |
2.81 |
1.92 |
.94 |
.11 |
.41 |
30 |
39.88 | 24.98 | 13.12 |
— |
2.31 |
1.90 |
.88 |
.14 |
.44 |
|
LL |
7 |
39.38 | 25.40 | 17.70 |
2.21 |
1.96 |
.87 |
.21 |
.30 |
|
HL ② |
4 |
33.88 | 32.68 | 24.00 |
2.67 |
2.25 |
.59 |
.049 |
.50 |
|
顽火辉石球粒陨石 |
8 |
38.62 | 21.01 | 1.69 |
— |
1.87 |
1.97 |
1.00 |
.11 |
.35 |
EH |
5 |
35.81 | 17.90 |
— |
1.95 |
1.43 |
.93 |
.13 |
.Cr=0.24 |
|
EL |
6 |
41.15 | 22.89 |
— |
1.98 |
1.24 |
.85 |
14 |
Cr=0.29 |
|
碳质球粒 |
||||||||||
陨石 |
||||||||||
C1 |
3 |
23.08 | 15.56 | 10.32 |
— |
1.77 |
1.55 |
.76 |
.07 |
.28 |
C2 |
8 |
27.31 | 19.00 | 20.06 |
— |
2.31 |
2.03 |
.54 |
.05 |
.39 |
C3 |
5 |
33.75 | 23.86 | 24.32 |
— |
2.65 |
2.32 |
.55 |
.05 |
.51 |
*包括 L 及 LL;②Keil(1969)及 Gomes 和 Keil(1980)将普通球粒陨石划④Fe2O3 均以 FeO 表示;(据欧阳自远,1988)平均化学成分
盐相 |
金属相 |
FeS2C 其 他 |
|||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MnO |
TiO2 |
P2O5 |
H2O |
NiO |
总计 |
Fe |
Ni |
Co |
P |
总计 |
|||
.26 |
0.11 |
0.20 |
0.27 |
— |
81.00 |
11.65 |
1.34 |
0.08 |
0.05 |
13.11 |
5.89 |
||
.26 |
0.11 |
0.18 |
.30 |
— |
75.05 |
17.45 |
1.68 |
.10 |
.05 |
19.28 |
5.67 |
||
.25 |
0.13 |
0.23 |
.33 |
— |
75.42 |
17.23 |
1.58 |
.085 |
— |
18.90 |
5.35 |
.107) |
|
.26 |
0.11 |
0.22 |
.24 |
— |
85.63 |
7.13 |
1.07 |
.07 |
.04 |
7.31 |
6.06 |
||
.27 |
0.15 |
0.26 |
.34 |
— |
84.67 |
7.7 |
1.12 |
.59 |
— |
8.88 |
6.17 |
.097) |
|
.32 |
0.19 |
0.22 |
.37 |
— |
89.58 |
3.39 |
.95 |
.052 |
— |
4.39 |
5.87 |
||
.20 |
0.13 |
0.30 |
.53 |
— |
88.78 |
3.64 |
1.43 |
.007 |
— |
5.15 |
5.90 |
.33 |
|
.14. 06 .20 .62 .00 Ti=0.07 , Mn=0.18 Ti=0.05 , Mn=0.10 |
66.29 |
19.82 ③ 32 85 ③ 24.88 |
1.66 1.77 1.53 |
.12 .09 .11 |
— .17 .12 |
21.60 |
10.70 S=5.57 S=3.31 |
.29 .43 .34 |
.77 |
||||
.19 |
.08 |
.27 |
.20.54 |
1.17 |
75.60 |
.11 |
.02 |
.00 |
— |
0.13 |
16.88 |
3.62 |
3.77 |
.17 |
.10 |
.27 |
13.23 |
1.56 |
87.02 |
.00 |
.16 |
.00 |
— |
0.16 |
8.58 |
2.44 |
1.80 |
.20 |
.12 |
.32 |
1.00 |
.33 |
89.98 |
2.34 |
1.08 |
.06 |
— |
3.48 |
6.08 |
0.46 |
— |
分出 H,L,LL 和 HL,HL 即高铁低金属群普通球粒陨石;③为铁和总含量;