|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SiO2 | 48.05 | 48.43 | 47.92 | 48.21 | 49.16 | 49.2 | 49.71 | 50.1 | 50.37 | 50.56 | 50.74 | 50.85 | 50.92 | 51.24 | 53.42 | 40.01 |
51.50
|
51.29
|
0.04
|
TiO2 | 2.04 | 2.00 | 2.16 | 2.24 | 2.29 | 2.57 | 2.68 | 2.71 | 3.09 | 3.16 | 3.35 | 3.36 | 3.61 | 3.74 | 3.36 | 0.04 |
1.10
|
0.00
|
48.16
|
Al2O3 | 10.33 | 10.70 | 10.75 | 11.37 | 13.33 | 12.77 | 13.65 | 13.78 | 14.02 | 13.92 | 13.57 | 14.02 | 13.80 | 13.6 | 13.75 | 1.13 |
4.20
|
31.29
|
0.11
|
Fe2O3 | 1.34 | 1.15 | 1.08 | 1.50 | 1.31 | 1.50 | 1.19 | 1.89 | 1.88 | 1.78 | 1.36 | 1.90 | 1.85 | 1.87 | 1.96 | 0.30 |
1.50
|
0.08
|
9.65
|
FeO | 10.19 | 10.08 | 10.65 | 10.18 | 9.71 | 10.05 | 9.72 | 9.46 | 10.07 | 10.18 | 10.63 | 10.44 | 10.71 | 11.19 | 10.45 | 12.33 |
6.00
|
0.00
|
39.82
|
MnO | 0.17 | 0.17 | 0.18 | 0.18 | 0.16 | 0.17 | 0.17 | 0.17 | 0.17 | 0.18 | 0.18 | 0.18 | 0.19 | 0.18 | 0.18 | 0.17 |
0.20
|
0.00
|
0.43
|
MgO | 17.39 | 16.29 | 15.43 | 13.94 | 10.41 | 10.00 | 8.24 | 7.34 | 6.75 | 6.33 | 6.16 | 5.68 | 5.46 | 5.12 | 3.92 | 44.77 |
16.20
|
0.00
|
1.17
|
CaO | 8.14 | 8.67 | 9.33 | 9.74 | 10.93 | 10.75 | 11.59 | 11.46 | 10.39 | 10.24 | 9.94 | 9.71 | 9.45 | 9.03 | 7.75 | 1.23 |
19.00
|
13.62
|
0.07
|
Na2O | 1.66 | 1.71 | 1.79 | 1.89 | 2.15 | 2.12 | 2.26 | 2.25 | 2.35 | 2.61 | 2.69 | 2.77 | 2.80 | 2.81 | 3.34 | 0.01 |
0.30
|
3.64
|
0.00
|
K2O | 0.36 | 0.35 | 0.44 | 0.44 | 0.51 | 0.51 | 0.54 | 0.57 | 0.62 | 0.64 | 0.67 | 0.74 | 0.75 | 0.83 | 1.10 | 0.00 |
0.01
|
0.08
|
0.00
|
P2O5 | 0.19 | 0.18 | 0.23 | 0.22 | 0.16 | 0.25 | 0.25 | 0.27 | 0.32 | 0.33 | 0.37 | 0.38 | 0.40 | 0.41 | 0.59 | 0.00 |
0.01
|
0.00
|
0.00
|
Total | 99.86 | 99.73 | 99.96 | 99.91 | 100.12 | 99.89 | 100.00 | 100.00 | 100.03 | 99.93 | 99.66 | 100.03 | 99.94 | 100.02 | 99.82 | 99.99 | 100.00 |
100.00
|
100.00 |
Mg# | 75.3 | 74.2 | 72.1 | 70.9 | 65.6 | 63.9 | 60.2 | 58 | 54.4 | 52.6 | 50.8 | 49.2 | 47.6 | 44.9 | 40.1 | 86.6 |
73.00
|
5
|
|
F | 34 | 35 | 38 | 38 | 43 | 44 | 47 | 48 | 51 | 52 | 53 | 53 | 54 | 56 | 56 |
22
|
27
|
0
|
97
|
M | 59 | 57 | 55 | 53 | 46 | 44 | 40 | 37 | 34 | 32 | 31 | 29 | 28 | 26 | 21 | 78 |
72
|
0
|
3
|
A | 7 | 7 | 8 | 9 | 12 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 18 | 18 | 24 | 0 |
1
|
100
|
0
|
D.I. | 16.18 | 16.54 | 17.75 | 18.59 | 21.2 | 20.95 | 22.31 | 23.52 | 26.01 | 27.93 | 28.97 | 30.64 | 31.54 | 32.92 | 41.44 | ||||
Normative Mineralogy | |||||||||||||||||||
Q | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.11 | 2.46 | 2.1 | 2.25 | 2.83 | 3.42 | 4.24 | 6.68 | ||||
Or | 2.13 | 2.07 | 2.6 | 2.6 | 3.01 | 3.01 | 3.19 | 3.37 | 3.66 | 3.74 | 3.96 | 4.37 | 4.43 | 4.9 | 6.5 | ||||
Ab | 14.05 | 14.47 | 15.15 | 15.99 | 18.19 | 17.94 | 19.12 | 19.04 | 19.89 | 22.09 | 22.76 | 23.44 | 23.69 | 23.78 | 28.26 | ||||
An | 19.67 | 20.49 | 20 | 21.24 | 25.22 | 23.82 | 25.51 | 25.82 | 25.88 | 24.38 | 22.97 | 23.64 | 22.87 | 22.04 | 19.28 | ||||
Cpx | 15.6 | 17.14 | 19.95 | 20.65 | 22.66 | 22.61 | 24.74 | 23.87 | 19.3 | 19.92 | 19.69 | 18.17 | 17.66 | 16.63 | 12.77 | ||||
Opx | 21.12 | 21.12 | 14.87 | 15.99 | 14.45 | 18.66 | 16.92 | 18.28 | 19.51 | 18.32 | 18.84 | 17.48 | 17.41 | 17.67 | 15.74 | ||||
Ol | 21.04 | 18.57 | 21.2 | 16.51 | 9.98 | 6.21 | 3.13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
Mt | 1.94 | 1.67 | 1.57 | 2.17 | 1.9 | 2.17 | 1.73 | 2.74 | 2.73 | 2.58 | 1.97 | 2.75 | 2.68 | 2.71 | 2.84 | ||||
Il | 3.87 | 3.8 | 4.1 | 4.25 | 4.35 | 4.88 | 5.09 | 5.15 | 5.87 | 6 | 6.36 | 6.38 | 6.86 | 7.1 | 6.38 | ||||
Ap | 0.45 | 0.43 | 0.54 | 0.52 | 0.38 | 0.59 | 0.59 | 0.64 | 0.76 | 0.78 | 0.88 | 0.97 | 0.95 | 0.97 | 1.4 |
Footnotes
Mg# = the magnesium number (100 * Mg2+ / (Mg2+
+ Fe2+)).
F, M, and A are the normalized values for plotting in the MgO-FeO-(Na2O+K2O)
triangular variation diagram.
D.I. = the Thorton and Tuttle (1960) Differentiation Index.
Analysis number 16 is that of a typical olivine phenocryst found in
PHAT basalts.
Analysis number 17 is that of a typical augite phenocryst found in
PHAT basalts.
Analysis number 18 is that of a typical plagioclase phenocryst found
in PHAT basalts.
Analysis number 19 is that of a typical ilmenite phenocryst found in
PHAT basalts.