APPENDIX 1

Geochemical Analyses- Tables 1,2
Mass Change Calculations- Table 3

Table 1a)               Major Element Analyses %


 
 Sample Rock Type SiO2 TiO2 Al2O3 Fe2O3 MnO CaO MgO Na2O K2O P2O5 SUM LOI
S97-9-40.6 Peridotite (Dunitic) 37.67 0.21 3.80 10.04 0.16 2.45 33.06 0.29 0.01 0.01 87.71 11.94
S97-9-148.3 Spinifex-textured flow 43.85 0.27 9.01 11.41 0.19 11.03 17.92 0.58 0.02 0.02 94.29 5.85
S97-9-173.2 Peridotite (Oikocrystic) 41.16 0.31 5.88 10.76 0.15 6.50 25.31 0.44 0.03 0.03 90.57 8.92
S97-9-254.6 Leuco Basalt (amydaloidal) 44.13 0.43 8.45 11.94 0.20 7.97 19.23 0.75 0.07 0.03 93.21 6.95
S97-9-287.6 Hyaloclastite 47.69 1.09 8.68 15.33 0.26 10.21 10.56 2.83 0.06 0.08 96.78 3.49
S97-9-291.0 Hyaloclastite 48.03 1.05 8.82 14.24 0.22 10.08 11.25 2.39 0.06 0.09 96.22 4.18
S97-9-296.5 Hyaloclastite 47.64 1.03 8.58 14.59 0.23 10.51 10.46 2.21 0.06 0.06 95.37 4.98
S97-9-330.9 Basalt Dike/Sill 47.02 1.09 8.98 13.98 0.20 10.35 12.26 1.82 0.05 0.08 95.85 4.49
S97-09-335.9 Spinifex-textured flow 42.54 0.64 11.00 12.76 0.24 7.21 17.30 1.25 0.27 0.02 93.22 6.65
S97-9-342.1 Hyaloclastite 48.55 1.10 8.52 16.14 0.24 9.28 10.17 3.11 0.06 0.07 97.23 2.79
S97-9-347.6 Hyaloclastite 47.77 1.08 8.92 15.26 0.22 8.63 10.61 2.84 0.05 0.08 95.45 4.88
S97-9-368.1 Basalt Dike/Sill 43.89 0.98 7.99 11.66 0.33 13.82 8.64 3.14 0.03 0.09 90.57 9.26
S97-9-379.8 Hyaloclastite 45.39 0.98 9.02 15.21 0.38 10.27 10.86 2.79 0.06 0.07 95.04 5.16
S97-9-386.4 Basalt Dike/Sill 46.40 1.07 8.28 14.46 0.40 8.96 12.99 2.43 0.05 0.07 95.11 5.23
S97-9-417.5 Peridotite Flow 39.49 0.33 6.54 13.00 0.21 3.53 25.61 0.03 0.10 0.02 88.86 10.60
S97-9-429.6 Peridotite Flow 44.42 0.50 8.96 12.48 0.20 8.83 17.74 1.06 0.06 0.02 94.28 5.88
S97-9-531.5 Peridotite Flow 40.12 0.32 6.04 12.78 0.19 4.53 25.80 0.51 0.16 0.03 90.47 9.21
S97-9-537.2 Peridotite Flow 45.33 0.45 8.50 10.18 0.18 10.63 18.29 1.15 0.05 0.04 94.80 5.51
S97-9-564.3 Hyaloclastite 47.75 0.80 7.48 10.47 0.32 17.25 10.13 2.56 0.01 0.08 96.87 2.68
S97-9-569.5 Hyaloclastite 47.76 1.06 8.76 13.67 0.18 9.52 11.47 3.30 0.04 0.07 95.83 4.09
S97-9-640.6 Basalt Dike/Sill 44.42 0.45 8.52 12.12 0.18 8.09 20.07 0.46 0.05 0.04 94.39 5.82
S97-9-664.1 Hyaloclastite 29.46 1.49 12.10 30.20 0.29 1.52 17.56 0.50 0.04 0.11 93.26 7.64
S97-9-666.7 Hyaloclastite 46.79 1.05 8.55 13.46 0.18 9.36 11.43 2.30 0.04 0.05 93.22 6.82
S97-9-673.9 Hyaloclastite 30.35 0.69 5.54 14.13 0.59 17.15 12.68 0.47 0.11 0.07 81.77 18.80
S97-9-677.0 Hyaloclastite 19.09 1.23 10.05 56.65 0.37 0.44 4.41 0.36 0.02 0.01 92.63 8.43
S97-9-714.4 Peridotite Flow 42.54 0.33 6.57 12.08 0.17 5.91 23.50 0.63 0.06 0.03 91.79 7.89
S97-9-738.6 Peridotite Flow 42.52 0.50 8.81 12.55 0.21 9.51 18.69 0.27 0.03 0.03 93.11 7.02
S98-02-357.5 Tholeiitic basalt 49.09 1.65 13.16 18.93 0.27 6.10 3.21 3.84 0.25 0.19 96.69 3.73
S98-04-136.5 Peridotite 37.10 0.18 3.04 9.89 0.14 0.53 34.74 0.60 0.01 0.01 86.25 14.30
S98-04-137.0 Silicified? Peridotite 39.06 0.72 12.66 11.41 0.24 23.86 8.57 0.07 0.02 0.20 96.81 3.35
S97-04-137.0 Silicified? Peridotite 40.05 0.65 14.44 10.97 0.23 22.47 7.75 0.87 0.04 0.17 97.63 2.60
S97-08-110 Spinifex-textured flow 45.23 0.54 9.95 11.94 0.20 8.95 16.31 1.70 0.27 0.03 95.13 4.66
S97-08A-349.8 Peridotite Flow 38.05 0.19 3.03 10.07 0.17 1.40 33.47 0.43 0.02 0.03 86.86 12.34

Table 1b) Major Element Analyses (P Series after Coad, 1976) %

Sample
 Rock Type SiO2
TiO2
Al2O3
Fe2O3
MnO
CaO
MgO
Na2O
K2O
SUM
 LOI
P10-001 Pillow Breccia 46.7
0.99
8.16
15.21
0.23
9.31
15.03
0.93
0.07
98.01
 2.90
P10-002 Pillow Breccia 49.50
0.99
8.04
13.44
0.18
7.91
15.21
1.42
0.07
98.01
 3.39
P10-003 Hyaloclastite 55.85
0.85
7.53
12.12
0.19
9.62
9.90
3.37
0.06
98.91
 0.64
P10-004 Hyaloclastite 48.34
1.09
8.90
15.12
0.25
9.98
12.04
1.73
0.30
98.69
 2.45
P10-005 Hyaloclastite 47.61
1.07
9.27
13.41
0.12
8.17
13.08
2.83
0.07
97.90
 3.61
P10-006 Hyaloclastite 48.54
1.03
9.03
16.02
0.18
9.61
10.22
2.70
0.05
97.92
 2.14
P10-007 Hyaloclastite 48.55
1.02
9.06
14.78
0.32
9.65
11.30
1.97
0.22
97.65
 2.26
P10-008 Hyaloclastite 48.10
0.99
8.67
13.63
0.26
11.47
10.69
2.49
0.05
97.89
 2.90
P10-009 Quench-Textured Tholeiite 47.30
1.03
7.94
14.71
0.26
11.75
12.73
1.59
0.06
98.11
 2.21
P10-010 Quench-Textured Tholeiite 45.87
1.07
8.62
15.89
0.27
10.94
13.20
0.81
0.12
98.47
 3.24
P10-011 Quench-Textured Tholeiite 45.26
1.06
8.67
15.64
0.26
11.61
12.75
0.98
0.08
98.35
 3.58
P10-012 Quench-Textured Tholeiite 45.59
1.01
8.18
16.21
0.25
11.42
13.03
0.69
0.17
98.13
 3.20
P10-013 Quench-Textured Tholeiite 44.55
1.08
8.98
15.52
0.46
8.30
15.51
0.89
0.06
97.47
 3.63
P10-014 Spinifex-textured flow 42.58
0.39
7.94
13.14
0.21
8.24
21.47
0.19
0.04
98.48
 5.59
P10-015 Spinifex-textured flow 43.86
0.45
9.26
12.43
0.23
11.23
17.60
0.15
0.03
98.59
 4.58
P10-016 Spinifex-textured flow 45.17
0.54
10.57
12.99
0.22
8.85
15.77
1.17
0.08
98.11
 3.78
P10-017 Spinifex-textured flow 41.71
0.33
7.55
13.22
0.19
7.22
22.79
0.25
0.03
98.06
 6.09
P10-018 Spinifex-textured flow 43.22
0.45
8.58
13.22
0.19
10.09
18.76
0.32
0.03
98.05
 4.51
P10-019 Spinifex-textured flow 42.45
0.45
9.03
12.92
0.21
8.29
20.37
0.14
0.04
98.43
 5.77
P10-020 Peridotite 40.48
0.27
5.94
12.30
0.17
5.72
26.78
0.08
0.06
97.89
 7.32
P10-021 Peridotite 42.75
0.28
5.89
11.07
0.15
5.19
26.77
0.10
0.04
98.74
 7.61
P10-022 Peridotite 40.86
0.31
4.81
14.14
0.19
4.48
28.09
0.14
0.06
97.71
 6.04
P10-023 Peridotite 41.57
0.25
4.89
12.05
0.17
3.48
28.35
0.09
0.04
98.37
 8.18
P10-024 Peridotite 36.69
0.23
4.66
11.13
0.18
3.22
30.50
0.09
0.03
98.07
 9.45
P10-025 Peridotite 40.40
0.20
4.43
7.81
0.18
5.23
30.83
0.04
0.01
98.25
 9.12
P10-026 Peridotite 39.75
0.22
4.75
8.96
0.17
4.73
30.41
0.03
0.06
98.75
 9.67
P10-027 Peridotite 44.87
0.44
8.70
10.07
0.21
8.27
19.58
0.59
0.04
98.64
 4.74
P10-028 Tuff 54.47
0.36
7.79
13.75
0.34
4.46
12.09
4.52
0.03
99.98
 1.35

 

Table 2. Trace Element Analyses

Sample Rock Type Sc V Cr Co Ni Cu Zn Nb Zr Y Sr Rb Ba
S97-9-40.6 Peridotite (Dunitic) 18 82 3286 102 1868 53 66 3 19 8 9 3 32
S97-9-148.3 Spinifex-textured flow 32 147 1574 103 555 37 83 1 21 13 31 5 1
S97-9-173.2 Peridotite (Oikocrystic) 31 143 3616 110 1344 303 70 3 24 9 21 13 25
S97-9-254.6 Leuco Basalt (amydaloidal) 32 183 2378 81 721 65 86 2 33 17 40 6 32
S97-9-287.6 Hyaloclastite 34 227 1292 73 414 114 96 5 77 20 91 6 10
S97-9-291.0 Hyaloclastite 32 240 1415 83 445 112 130 4 81 21 60 8 48
S97-9-296.5 Hyaloclastite 37 227 1415 73 521 138 122 1 74 18 123 8 77
S97-9-330.9 Basalt Dike/Sill 36 248 789 27 188 85 94 5 87 25 125 11 23
S97-09-335.9 Spinifex-textured flow 41 237 1558 90 418 68 89 3 38 18 78 14 46
S97-9-342.1 Hyaloclastite 30 229 1336 80 427 137 101 5 85 24 79 9 28
S97-9-347.6 Hyaloclastite 33 233 1442 75 414 107 97 7 88 24 67 6 4
S97-9-368.1 Basalt Dike/Sill 29 209 1061 63 367 89 118 2 71 19 102 8 8
S97-9-379.8 Hyaloclastite 30 216 1362 98 480 151 166 5 93 23 74 8 49
S97-9-386.4 Basalt Dike/Sill 33 251 1006 52 289 71 169 3 76 20 42 7 1
S97-9-417.5 Peridotite Flow 27 151 4836 113 1323 88 82 0 24 6 21 10 5
S97-9-429.6 Peridotite Flow 34 197 1791 91 603 23 66 3 33 16 86 4 20
S97-9-531.5 Peridotite Flow 30 134 3770 111 1205 55 184 6 30 14 15 13 30
S97-9-537.2 Peridotite Flow 33 155 2343 53 702 25 182 2 35 15 75 13 16
S97-9-564.3 Hyaloclastite 19 147 834 40 303 62 68 8 68 23 119 10 37
S97-9-569.5 Hyaloclastite 37 244 1370 100 451 134 137 4 79 19 68 9 10
S97-9-640.6 Basalt Dike/Sill 32 169 2405 78 599 68 102 5 37 17 24 5 6
S97-9-664.1 Hyaloclastite 55 458 2291 77 309 159 16 5 105 18 28 23 18
S97-9-666.7 Hyaloclastite 29 168 910 44 269 63 97 3 52 21 30 11 15
S97-9-673.9 Hyaloclastite 20 150 849 34 283 63 89 5 59 19 143 25 1
S97-9-677.0 Hyaloclastite 67 396 1913 12 126 173 0 10 99 31 17 26 2
S97-9-714.4 Peridotite Flow 25 149 3356 99 1017 41 107 3 27 8 8 14 2
S97-9-738.6 Peridotite Flow 36 177 2017 74 635 30 67 2 37 16 18 12 0
S98-02-357.5 Tholeiitic basalt 19 117 64 36 19 53 128 5 133 32 315 28 99
S98-04-136.5 Peridotite 17 86 1747 122 1894 609 76 2 20 8 8 4 21
S98-04-137.0 Silicified? Peridotite 26 152 52 36 84 2 70 4 86 17 251 18 0
S97-04-137.0 Silicified? Peridotite 24 138 55 60 87 49 66 5 68 14 821 19 2
S97-08-110 Spinifex-textured flow 30 189 2297 89 605 106 83 0 37 9 69 26 14
S97-08A-349.8 Peridotite Flow 20 83 5075 114 1992 34 79 1 16 3 10 1 19

Table 3. Calculated Chemical Gains and Losses Assuming Constant TiO2


 



 

Altered

Oxide

 Precursor

S98-4-136.5

 Altered

S98-4-137

 Change

Gains/Losses
SiO2 40.1 40.34 -30.02
TiO2 0.21 0.74 -0.03
Al2O3 3.52 13.07 -0.25
FeO (total) 10.31 10.6 -7.66
MnO 0.16 0.25 -0.1
CaO 0.61 24.65 5.55
MgO 40.28 8.85 -38.07
Na2O 0.69 0.07 -0.67
K2O 0.01 0.02 -0.01
P2O5 0.01 0.2 0.04
Cu 608 2 -607
Zn 76 69 -58.75

               Chemical Gains and losses calculated assuming constant TiO2 and single precursor for ultramafic komatiitic flows
                (S98-4-136.5) and tholeiitic hyaloclastite (S97-9-569.5).

                Calculation done using the method of Maclean.

                Calculated gains and losses are approximate and calculated values do not equal weight % changes.

                The direction of change ie, positive (added) or negative (removed) is the most significant.

                Oxides represent anhydrous values.
 

                Hyaloclastite - Carbonate Matrix

Oxide Precursor

S97-9-569.5

 Altered

S97-9-564.3

 Change

Gains/Losses

 Altered

S97-9-673.9

 Change

Gains/Losses
SiO2 50.56 49.84 15.48 37.76 8
TiO2 1.12 0.83 -0.02 0.89 0.26
Al2O3 9.27 7.8 1.07 6.89 1.41
FeO (total) 13.02 9.83 0 15.2 10.55
MnO 0.19 0.33 0.25 0.73 0.94
CaO 10.07 18 13.78 21.34 23.02
MgO 12.14 10.57 1.87 15.77 12.31
Na2O 3.49 2.67 0.05 0.58 -2.59
K2O 0.04 0.01 -0.03 0.13 0.16
P2O5 0.07 0.08 0.04 0.07 0.04
Cu 61 61 19 62 35
Zn 68 68 22 89 70

Hyaloclastite - Black Chlorite Alteration


 



 

Oxide Precursor

S97-9-569.5

 Altered

S97-9-677

 Change

Gains/Losses

 Altered

S97-9-664.1

 Change

Gains/Losses
SiO2 50.56 21.95 -31.64 32.64 -27.34
TiO2 1.12 1.41 0.1 1.65 0.05
Al2O3 9.27 11.55 0.68 13.4 0.26
FeO (total) 13.02 58.61 37.49 30.11 8.4
MnO 0.19 0.43 0.18 0.32 0.04
CaO 10.07 0.5 -9.64 1.68 -8.87
MgO 12.14 5.07 -7.77 19.45 1.7
Na2O 3.49 0.41 -3.14 0.55 -3.1
K2O 0.04 0.02 -0.02 0.04 -0.01
P2O5 0.07 0.01 0.06 0.12 0.02
Cu 61 172 87 159 52
Zn 68 1 -67 16 -56