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Table 3 Representative analyses of opaque minerals (wt%)

From: An Almahata Sitta EL3 fragment: implications for the complex thermal history of enstatite chondrites

Phase

Occurrence

Mg

Si

P

S

Ca

Ti

Cr

Mn

Fe

Co

Ni

Cu

Zn

Total

Keilite

Chondrule

2.63

0.05

b.d

38.25

2.47

0.15

7.11

18.99

24.73

b.d

b.d

0.10

0.44

94.92

Fe–Ni metal

Chondrule

b.d

0.45

0.42

b.d

b.d

b.d

0.06

b.d

90.13

0.33

7.48

b.d

0.08

98.94

Fe–Ni metal

Isolated mineral

b.d

0.42

0.41

b.d

b.d

b.d

b.d

b.d

90.38

0.29

7.59

0.06

b.d

99.27

Oldhamite

Chondrule

0.61

0.20

0.04

40.90

53.28

b.d

b.d

1.19

0.77

b.d

b.d

b.d

b.d

96.99

Schreibersite

Isolated mineral

b.d

0.05

14.61

b.d

b.d

b.d

0.06

b.d

76.86

0.25

7.46

b.d

b.d

99.30

Buseckite

Chondrule

0.92

0.05

b.d

33.92

b.d

b.d

b.d

5.00

29.09

b.d

b.d

b.d

26.12

95.09

Troilite

Chondrule

0.08

b.d

b.d

36.40

b.d

0.32

2.41

1.33

57.58

b.d

0.20

0.07

b.d

98.40

Troilite

Isolated mineral

b.d

b.d

b.d

36.19

b.d

0.28

2.14

1.28

58.11

b.d

0.24

0.09

b.d

98.34

  1. b.d.: below detection limits (3 s), 0.03 for Mg, Si, P, Ti, and Ca, 0.05 for S, Co, Ni, Cr, Mn, Fe, Zn, and Cu
  2. The data of Fe–Ni metal and schreibersite as isolated mineral in this table are use to calculate geothermometries (see Text)