Table 2. Experimental conditions and results.
| Run # | Temp (ºC) |
fO2 log |
Phase assemblage | Phase proportions | Na2O
loss (wt%) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Duration (hr) |
Gl | Ol | Pl | Lpx | Aug | |||||||||||
152-917A-27R-2 (Piece 4, 38-43 cm) |
||||||||||||||||
27R2-6 |
1177 |
-9.13 |
23 |
Gl |
1.000 |
1.178 |
0.20 |
|||||||||
27R2-7 |
1168 |
-8.64 |
21 |
Gl |
Ol |
Pl |
0.862 |
0.032 |
0.106 |
0.369 |
0.30 |
|||||
27R2-9 |
1158 |
-8.81 |
69 |
Gl |
Ol |
Pl |
0.832 |
0.047 |
0.121 |
0.115 |
0.40 |
|||||
27R2-10 |
1148 |
-9.25 |
68 |
Gl |
Ol |
Pl |
0.752 |
0.065 |
0.183 |
0.170 |
0.30 |
|||||
27R2-11 |
1136 |
-9.26 |
92 |
Gl |
Ol |
Pl |
Lpx |
0.679 |
0.014 |
0.209 |
0.098 |
0.034 |
0.50 |
|||
27R2-12 |
1130 |
-9.39 |
71 |
Gl |
Ol |
Pl |
Lpx |
0.574 |
<0.010 |
0.276 |
0.150 |
0.042 |
0.50 |
|||
27R2-13 |
1120 |
-9.55 |
91 |
Gl |
Ol |
Pl |
Lpx |
0.504 |
<0.010 |
0.311 |
0.199 |
0.087 |
0.50 |
|||
27R2-8 |
1111 |
-9.58 |
68 |
Gl |
Ol |
Pl |
Lpx |
0.470 |
<0.010 |
0.331 |
0.198 |
0.036 |
0.60 |
|||
27R2-19 |
1101 |
-9.65 |
239 |
Gl |
Ol |
Pl |
Lpx |
0.425 |
0.066 |
0.370 |
0.139 |
0.408 |
0.50 |
|||
152-918D-108R-1 (Piece 2B, 54-58 cm) |
||||||||||||||||
108R1-4 |
1197 |
-8.66 |
20 |
Gl |
1.000 |
1.187 |
0.20 |
|||||||||
108R1-5 |
1186 |
-8.81 |
27 |
Gl |
Ol |
Pl |
0.851 |
0.050 |
0.099 |
0.686 |
||||||
108R1-6 |
1177 |
-9.13 |
23 |
Gl |
Ol |
Pl |
Aug |
0.816 |
0.041 |
0.085 |
0.058 |
0.011 |
0.20 |
|||
108R1-7 |
1168 |
-8.64 |
21 |
Gl |
Ol |
Pl |
Aug |
0.694 |
0.041 |
0.148 |
0.117 |
0.019 |
||||
108R1-9 |
1158 |
-8.81 |
69 |
Gl |
Ol |
Pl |
Aug |
0.597 |
0.055 |
0.198 |
0.150 |
0.283 |
||||
108R1-10 |
1148 |
-9.25 |
68 |
Gl |
Ol |
Pl |
Aug |
Lpx |
0.496 |
0.036 |
0.226 |
<0.010 |
0.253 |
0.020 |
||
108R1-11 |
1136 |
-9.26 |
92 |
Gl |
Ol |
Pl |
Aug |
-- |
0.390 |
<0.010 |
0.289 |
0.226 |
0.153 |
0.017 |
0.20 |
|
108R1-12 |
1130 |
-9.39 |
71 |
Gl |
Ol |
Pl |
Aug |
Lpx |
0.315 |
<0.010 |
0.315 |
0.218 |
0.176 |
0.005 |
0.20 |
|
108R1-8 |
1111 |
-9.58 |
68 |
Gl |
Ol |
Pl |
Aug |
Lpx |
0.117 |
0.020 |
0.410 |
0.154 |
0.299 |
0.129 |
0.10 |
|
108R1-21 |
1103 |
-9.56 |
70 |
Gl |
Ol |
Pl |
Aug |
Lpx |
0.221 |
<0.010 |
0.366 |
0.214 |
0.219 |
0.015 |
0.20 |
|
163-989B-10R-7 (Piece 5A, 55-59 cm) |
||||||||||||||||
989B-8 |
1186 |
-8.83 |
8 |
Gl |
1.000 |
|||||||||||
989B-7 |
1182 |
-8.81 |
22 |
Gl |
Ol |
0.981 |
0.019 |
0.020 |
||||||||
989B-4 |
1172 |
-8.91 |
25 |
Gl |
Ol |
Pl |
0.918 |
0.045 |
0.037 |
0.012 |
||||||
989B-10 |
1612 |
-9.00 |
13 |
Gl |
Ol |
Pl |
Aug |
0.825 |
0.069 |
0.097 |
0.009 |
0.018 |
||||
989B-9 |
1158 |
-9.07 |
20 |
Gl |
Ol |
Pl |
Aug |
0.737 |
0.078 |
0.137 |
0.048 |
0.005 |
||||
989B-1 |
1150 |
-9.55 |
22 |
Gl |
Ol |
Pl |
Aug |
0.697 |
0.078 |
0.143 |
0.082 |
0.218 |
0.10 |
|||
989B-5 |
1125 |
-9.48 |
27 |
Gl |
Ol |
Pl |
Aug |
0.412 |
0.119 |
0.290 |
0.179 |
0.009 |
||||
989B-3 |
1101 |
-9.59 |
21 |
Gl |
Ol |
Pl |
Aug |
Lpx |
0.263 |
0.121 |
0.356 |
0.036 |
0.224 |
0.002 |
0.10 |
|
Notes: Abbreviations of
experimental phase assemblage are gl = glass; ol = olivine; pl = plagioclase;
lpx = low-Ca pyroxene; aug = augite; -- = phase not observed. Temp = the
experimental temperature in ºC. The phase proportions (wt%) are calculated by
least squares mixing calculations, as explained in the text.
r2
= the sum of squares of residuals. The loss of Na2O has been
estimated by including Na2O as a phase in the mixing calculations.
Since the mineral phases were not analyzed for Runs # 10R7-1 and 108R1-8,
appropriate compositions were used in the calculating of the mode.