ROCK TYPE

OXIDES

RHYOLITE

TRACHYTE

TUFF

BASALT

Maximum value (with sample number)

Minimum value (with sample number)

Maximum value (with sample number)

Minimum value (with sample number)

Maximum value (with sample number)

Minimum value (with sample number)

Maximum value (with sample number)

Minimum value (with sample number)

SiO₂

71.9 (35)

64.8 (113)

69.4 (51)

66.7 (63)

66.6 (13)

64.9 (89)

54 (154)

45.59 (159 {2})

TiO₂

2.84 (116)

1.61 (152)

2.93 (51)

2.67 (63)

3.16 (13)

2.6 (89)

4.12 (6)

2.34 (5)

Al₂O₃

13.1 (28)

7.2 (116)

10.5 (56)

6.1 (63)

13.8 (2)

10.2 (13)

17.4 (159 {2})

11.2 (160a)

Fe₂O₃

9.7 (35)

5.4 (48)

10.2 (63)

8.1 (56)

8.9 (13)

7.2 (2)

14.5 (159 {2})

9.67 (160a)

MnO

1.9 (170)

0.13 (152)

3.13 (56)

1.25 (51)

1.25 (13)

0.75 (89)

2.7 (160a)

1.62 (159 {2})

MgO

3.28 (135)

0.49 (104)

1.47 (56)

0.49 (51)

2.56 (13)

2.13 (89)

6.56 (160a)

4.42 (154)

CaO

3.64 (164)

0.8 (135)

1.52 (51)

0.8 (56)

1.96 (89)

0.56 (13)

7.6 (154)

1.68 (6)

Na₂O

1.18 (164, 170)

0.94 (116)

1.09 (63)

1.06 (56)

1.1 (89)

0.94 (13)

2.71 (160a)

1 (6)

K₂O

6.71 (15)

4.48 (35)

7.28 (63)

4.3 (56)

5.82 (89)

4.93 (2)

4.46 (5)

1.85 (154)

P₂O₅

0.66 (113)

0.32 (104)

0.55 (56)

0.5 (63)

0.65 (89)

0.58 (13)

0.88 (160a)

0.31 (159 {2})

H₂O

0.5 (15)

0.1 (116, 126)

0.2 (63)

0.1 (51, 56)

0.4 (13)

0.2 (2, 89)

0.8 (159 {2})

0.3 (154, 6)

CIPW Norms

Quartz

46.4 (35)

29.2 (28)

42.72 (56)

37.4 (63)

37.25 (2)

30.69 (89)

23.27 (6)

3.71 (159 {2})

Orthoclase

39.7 (15)

26.5 (35)

37.29 (51)

25.41 (56)

34.39 (89)

29.13 (2)

26.36 (5)

10.93 (154)

Albite

9.22 (135, 152)

2.85 (170)

8.97 (56)

1.9 (51)

9.31 (89)

7.95 (13)

22.93 (160a)

8.46 (6)

Anorthite

8.25 (28)

0.44 (135)

0.38 (56)

---

5.48 (89)

0.75 (2)

30.22 (159 {2})

5.79 (6)

Corundm

5.38 (82)

0.29 (35)

3.96 (56)

---

3.11 (13)

---

---

---

Diopside

8.08 (170)

2.63 (104)

0.65 (63)

---

7.05 (2)

2.18 (89)

7.64 (6)

0.79 (159 {2})

Hypersthene

8.17 (135)

0.34 (170)

3.66 (56)

1.22 (51)

6.38 (13)

---

9.7 (160a)

2.72 (154)

Wollastonite

0.72 (164)

0.21 (104)

2.69 (63)

---

6.13 (2)

5.3 (89)

15.44 (159 {2})

9.75 (154)

Olivine

---

---

8.13 (63)

---

---

---

---

---

Acmite

6.29 (170)

0.84 (48)

6.3 (51)

1.78 (56)

---

---

---

---

Illmenite

6.28 (152)

0.41 (15, 82)

5.53 (56)

2.67 (51)

2.67 (13)

1.6 (89)

5.78 (160a)

3.47 (159 {2})

Hematite

9.7 (35)

5.11 (48)

7.39 (63)

6.52 (51)

8.9 (13)

7.2 (2)

14.5 (159 {2})

9.67 (160a)

Apatite

1.53 (113)

0.74 (104)

1.27 (56)

1.16 (63)

1.51 (89)

1.34 (13)

2.04 (160a)

0.72 (159 {2})

Sphene

5.14 (15)

0.49 (170)

2.83 (51)

1.02 (63)

2.59 (2)

2.24 (89)

1.92 (6)

0.79 (159 {2})

Rutile

2.48 (82)

0.81 (48)

0.47 (51)

---

2.24 (13)

---

3.81 (154)

1.04 (5)

DI

84.7 (104)

72.76 (164)

78.26 (51)

70.71 (63)

77.08 (13)

74.39 (89)

54.07 (6)

33.37 (159 {2})

AI

1.19 (170)

0.55 (82)

1.59 (63)

0.62 (56)

0.73 (13)

0.51 (2)

0.73 (160a)

0.31 (159 {2})

Na + K

7.92 (104)

5.52 (35)

8.37 (63)

5.36 (56)

6.92 (89)

6 (2)

6.5 (160a)

3.04 (154)

Na/K

0.24 (135)

0.15 (28)

0.25 (56)

0.15 (63)

0.22 (2)

0.17 (13, 89)

0.72 (160a)

0.23 (5)

KN/C

7.06 (135)

2.19 (15)

7.47 (63)

4.85 (51)

8 (13)

1.66 (2)

2.85 (6)

0.4 (154)

A/CNK

1.44 (82)

0.47 (164)

1.43 (56)

0.55 (63)

1.75 (2)

1 (89)

1.67 (6)

0.12 (160a)

An/An + b

0.51 (28)

0.05 (135)

0.04 (56)

---

0.37 (89)

0.08 (2)

0.76 (159 {2})

0.24 (160a)

Mg#

---

---

---

---

---

---

54.1 (154)

45.9 (159 {2})