Alkaline rocks Alkaline series Nepheline Alkali Ankaramite basanite ...

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COMPOSITION. 35. SiO. 2. 44.1. 44.2. 45.4. 47 .9. 49.7. 55.6. 60.7. 60.6. TiO. 2. 2.7. 1 .6. 3.0. 3.4. 2.1. 0.9. 0.5. 0.1. Al. 2O. 3. 12.1. 15.6. 14.7. 15.9. 17 .0. 16.4.
0.7 0.3 3.8 3.4 4.2 12.5 22.6 26.3 – 23.9 2.8

K2O

P2O5

Il

Mt

Or

Ab

An

Di

Hy

Ol

Ne

–

1.9

Na2O

Ac

11 .5

CaO

–

13.0

MgO

0.6

9.6

FeO

Ap

3.2

–

1 .5

–

13.9

14.5

–

19.7

19.6

13.2

10.8

4.7

2.3

0.7

1 .8

4.0

9.7

8.9

6.1

–

0.9

–

3.1

14.1

–

21 .0

24.1

22.2

6.0

4.4

4.3

0.4

1 .0

3.0

10.5

7.8

9.2

4.1

14.7

–

1.5

–

0.5

8.3

–

12.3

20.6

37 .7

9.1

5.2

4.8

0.7

1 .5

4.2

8.0

4.8

7.6

4.9

15.9

3.4

47 .9

Hawaiite

–

1 .1

–

7 .2

9.7

–

7 .6

15.1

41 .2

11 .5

3.7

3.0

0.5

1 .9

5.8

5.5

2.8

9.0

3.5

17 .0

2.1

49.7

Mugearite

–

1 .5

–

–

2.3

3.3

2.3

7 .3

57 .0

21 .5

3.9

1 .3

0.7

3.5

6.1

2.9

1 .1

4.9

3.1

16.4

0.9

55.6

Benmorite

–

0.2

–

4.7

–

–

–

6.2

47 .0

38.9

2.4

0.7

0.1

6.7

6.2

1.4

0.2

0.4

2.3

20.5

0.5

60.7

Trachyte

7 .7

–

5.9

14.4

1 .5

–

–

3.9

44.4

22.1

–

0.1

–

5.1

8.9

0.8

0.1

1 .2

2.8

18.3

0.1

60.6

Phonolite

8:53 AM

Lc

15.6

12.1

Al2O3

Fe2O3

3.0

45.4

Alkali olivine basalt

12/7/06

4.4

1 .6

2.7

44.2

44.1

SiO2

Nepheline basanite

TiO2

Ankaramite

Alkaline rocks Alkaline series

34489_Ch02_final.qxd Page 35

COMPOSITION 35