Element or mineral^a

Average

Standard deviation

Minimum

Maximum

Fe_T

80.1

4.89

43.5

91.4

SiO₂

2.87

0.65

0.87

6.74

Amphiboles

11.7

29.4

0.00

65.0

Apatite

23.4

21.4

0.33

89.0

Carbonates

31.5

32.7

0.00

90.0

Hematite Goethite

80.0

4.97

43.1

91.7

Magnetite

83.8

14.7

0.00

93.9

Mica

2.76

6.44

0.00

55.0

Manganese oxides

28.0

11.5

0.00

82.0

Plagioclases

7.31

9.32

0.00

60.0

Pyrite

62.1

15.8

14.2

93.2

Quartz

2.87

0.64

0.86

6.61

Titaniferous minerals

33.1

39.8

0.00

87.0