<table><caption>Table 5</caption><thead><tr><th>Name</th><th>Host Rocks</th><th>Regional setting</th><th>n</th><th>depth (m)</th><th>Cu</th><th>Zn</th><th>Pb</th><th>Fe<br>(wt %)</th><th>S</th><th>SiO2</th><th>Ba</th><th>Ag</th><th>Au</th><th>Cd</th><th>As</th><th>Sb</th><th>Ni</th><th>Co</th><th>Se</th><th>Mo</th><th>In</th><th>Sn</th><th>references</th></tr></thead><tbody><tr><td colspan="15"><strong>Fast-spreading mid-ocean ridges</strong></td></tr><tr><td>13°N</td><td>MORB</td><td>East Pacific Rise</td><td>31</td><td>2650</td><td>4.56</td><td>15.26</td><td>0.09</td><td>25.48</td><td>36.54</td><td>2.21</td><td>0.00</td><td>88</td><td>0.56</td><td>436</td><td>210</td><td>3</td><td>2</td><td>408</td><td>96</td><td>48</td><td>&lt;5</td><td>&lt;10</td><td>1</td></tr><tr><td>17°30S</td><td>MORB</td><td>East Pacific Rise</td><td>28</td><td>2573</td><td>2.65</td><td>11.99</td><td>0.05</td><td>32.76</td><td>41.57</td><td>4.14</td><td>0.00</td><td>44</td><td>0.10</td><td>302</td><td>211</td><td>3</td><td>1</td><td>218</td><td>263</td><td>63</td><td>4</td><td>3</td><td>2</td></tr><tr><td>18°30S</td><td>MORB</td><td>East Pacific Rise</td><td>18</td><td>2640</td><td>10.19</td><td>8.54</td><td>0.04</td><td>31.28</td><td>46.89</td><td>2.05</td><td>0.03</td><td>55</td><td>0.32</td><td>273</td><td>141</td><td>15</td><td>24</td><td>1321</td><td>243</td><td>197</td><td>9</td><td>8</td><td>3</td></tr><tr><td>21°30S</td><td>MORB</td><td>East Pacific Rise</td><td>26</td><td>2820</td><td>9.90</td><td>4.10</td><td>0.06</td><td>37.50</td><td>22.99</td><td>4.04</td><td>0.01</td><td>62</td><td>0.42</td><td>220</td><td>31</td><td>1</td><td>219</td><td>1185</td><td>-</td><td>90</td><td>-</td><td>-</td><td>4</td></tr><tr><td colspan="15"><strong>Slow-spreading mid-ocean ridges</strong></td></tr><tr><td>Menez Gwen</td><td>E-MORB</td><td>Mid Atlantic Ridge</td><td>26</td><td>820</td><td>1.75</td><td>1.66</td><td>0.05</td><td>7.12</td><td>14.25</td><td>25.99</td><td>20.77</td><td>27</td><td>0.15</td><td>100</td><td>114</td><td>30</td><td>22</td><td>18</td><td>63</td><td>55</td><td>-</td><td>-</td><td>5</td></tr><tr><td>Lucky Strike</td><td>E-MORB</td><td>Mid Atlantic Ridge</td><td>154</td><td>1650</td><td>5.37</td><td>4.16</td><td>0.05</td><td>21.05</td><td>30.97</td><td>12.38</td><td>10.85</td><td>74</td><td>0.30</td><td>195</td><td>334</td><td>28</td><td>10</td><td>89</td><td>110</td><td>79</td><td>1</td><td>1</td><td>6</td></tr><tr><td>TAG</td><td>MORB</td><td>Mid Atlantic Ridge</td><td>66</td><td>3670</td><td>8.34</td><td>7.63</td><td>0.04</td><td>25.13</td><td>26.56</td><td>8.89</td><td>0.01</td><td>81</td><td>1.40</td><td>203</td><td>98</td><td>15</td><td>68</td><td>95</td><td>30</td><td>84</td><td>-</td><td>2</td><td>7</td></tr><tr><td>Snake Pit</td><td>MORB</td><td>Mid Atlantic Ridge</td><td>71</td><td>3500</td><td>8.26</td><td>6.10</td><td>0.05</td><td>36.95</td><td>36.03</td><td>3.00</td><td>-</td><td>80</td><td>1.79</td><td>242</td><td>312</td><td>27</td><td>1</td><td>135</td><td>135</td><td>60</td><td>4</td><td>25</td><td>8</td></tr><tr><td>Krasnov</td><td>MORB</td><td>Mid Atlantic Ridge</td><td>16</td><td>3700</td><td>2.21</td><td>0.14</td><td>0.01</td><td>38.96</td><td>42.90</td><td>11.21</td><td>0.27</td><td>18</td><td>1.10</td><td>19</td><td>66</td><td>20</td><td>15</td><td>628</td><td>23</td><td>88</td><td>10</td><td>23</td><td>9</td></tr><tr><td>Rainbow</td><td>Ultramafic rocks +- gabbros</td><td>Mid Atlantic Ridge</td><td>116</td><td>2400</td><td>12.43</td><td>14.99</td><td>0.03</td><td>28.56</td><td>32.75</td><td>0.71</td><td>0.29</td><td>188</td><td>5.10</td><td>391</td><td>214</td><td>34</td><td>490</td><td>5086</td><td>186</td><td>29</td><td>10</td><td>138</td><td>10</td></tr><tr><td>Achadze-1</td><td>Ultramafic rocks +- gabbros</td><td>Mid Atlantic Ridge</td><td>49</td><td>4100</td><td>14.21</td><td>14.11</td><td>0.03</td><td>32.81</td><td>31.74</td><td>1.30</td><td>0.05</td><td>79</td><td>6.30</td><td>251</td><td>231</td><td>29</td><td>973</td><td>2882</td><td>200</td><td>31</td><td>11</td><td>347</td><td>11</td></tr><tr><td>logatchev-1</td><td>Ultramafic rocks +- gabbros</td><td>Mid Atlantic Ridge</td><td>18</td><td>3000</td><td>28.03</td><td>3.82</td><td>0.02</td><td>28.60</td><td>32.44</td><td>2.83</td><td>0.08</td><td>45</td><td>6.50</td><td>94</td><td>65</td><td>26</td><td>92</td><td>654</td><td>772</td><td>23</td><td>14</td><td>249</td><td>12</td></tr><tr><td colspan="15"><strong>Back-arc basins</strong></td></tr><tr><td>Central Manus</td><td>MORB, minor BABB</td><td>Central Manus basin</td><td>152</td><td>2500</td><td>1.00</td><td>17.60</td><td>0.60</td><td>11.60</td><td>24.50</td><td>24.20</td><td>8.70</td><td>514</td><td>-</td><td>500</td><td>425</td><td>-</td><td>19</td><td>24</td><td>-</td><td>-</td><td>&lt;20</td><td>-</td><td>13</td></tr><tr><td>Vienne Wood</td><td>MORB, minor BABB</td><td>Central Manus basin</td><td>18</td><td>2500</td><td>1.04</td><td>21.07</td><td>0.21</td><td>6.46</td><td>26.19</td><td>13.40</td><td>2.20</td><td>114</td><td>3.00</td><td>929</td><td>156</td><td>29</td><td>&lt;20</td><td>&lt;10</td><td>7</td><td>82</td><td>&lt;5</td><td>&lt;10</td><td>14</td></tr><tr><td>North Fiji</td><td>MORB, E-MORB, minor BABB</td><td>North fiji basin</td><td>26</td><td>1950</td><td>7.16</td><td>6.38</td><td>0.05</td><td>30.05</td><td>36.67</td><td>16.24</td><td>0.70</td><td>145</td><td>0.83</td><td>180</td><td>175</td><td>18</td><td>4</td><td>156</td><td>162</td><td>270</td><td>&lt;5</td><td>&lt;10</td><td>15</td></tr><tr><td>Central Mariana trough 18°N</td><td>MORB, minor BABB</td><td>Marianne trough</td><td>11</td><td>3675</td><td>1.20</td><td>10.00</td><td>7.40</td><td>2.40</td><td>17.80</td><td>1.20</td><td>33.30</td><td>185</td><td>0.78</td><td>465</td><td>125</td><td>190</td><td>-</td><td>2</td><td>10</td><td>5</td><td>-</td><td>-</td><td>16</td></tr><tr><td>Kings Triple Junction</td><td>BABB, MORB, low K andesite</td><td>Northern Lau basin</td><td>78</td><td>2000</td><td>5.60</td><td>28.20</td><td>0.10</td><td>8.70</td><td>-</td><td>14.40</td><td>-</td><td>17</td><td>-</td><td>555</td><td>380</td><td>-</td><td>5</td><td>27</td><td>-</td><td>-</td><td>53</td><td>-</td><td>17</td></tr><tr><td>Kulo Lasi</td><td>MORB, trachy-andesite</td><td>Futuna volcanic area</td><td>16</td><td>1500</td><td>0.80</td><td>8.97</td><td>0.29</td><td>26.71</td><td>32.21</td><td>6.36</td><td>1.00</td><td>46</td><td>&lt;1</td><td>433</td><td>531</td><td>44</td><td>41</td><td>1121</td><td>265</td><td>42</td><td>15</td><td>168</td><td>18</td></tr><tr><td>Pacmanus</td><td>BABB, MORB, low K andesite, dacite</td><td>Eastern Manus basin</td><td>111</td><td>1650</td><td>6.40</td><td>24.80</td><td>1.40</td><td>12.40</td><td>24.70</td><td>10.80</td><td>6.40</td><td>290</td><td>13.49</td><td>960</td><td>4600</td><td>670</td><td>7</td><td>7</td><td>10</td><td>97</td><td>57</td><td>9</td><td>19</td></tr><tr><td>SuSu</td><td>BABB, MORB, low K andesite, dacite</td><td>Eastern Manus basin</td><td>19</td><td>1460</td><td>14.20</td><td>1.10</td><td>0.20</td><td>20.80</td><td>29.70</td><td>14.10</td><td>5.30</td><td>97</td><td>14.52</td><td>92</td><td>7890</td><td>385</td><td>-</td><td>118</td><td>39</td><td>470</td><td>-</td><td>-</td><td>20</td></tr><tr><td>Vai Lili</td><td>BABB, MORB, low K andesite, dacite</td><td>Southern Lau basin</td><td>24</td><td>1710</td><td>7.52</td><td>20.65</td><td>0.21</td><td>10.15</td><td>28.13</td><td>4.41</td><td>9.02</td><td>113</td><td>1.21</td><td>566</td><td>1213</td><td>29</td><td>9</td><td>1</td><td>1</td><td>24</td><td>73</td><td>6</td><td>21</td></tr><tr><td>White Church</td><td>BABB, MORB, low K andesite, dacite</td><td>Southern Lau basin</td><td>21</td><td>1966</td><td>3.80</td><td>11.09</td><td>0.38</td><td>7.06</td><td>18.83</td><td>21.62</td><td>23.98</td><td>109</td><td>2.26</td><td>318</td><td>430</td><td>85</td><td>2</td><td>2</td><td>2</td><td>53</td><td>1</td><td>0</td><td>22</td></tr><tr><td>Northern Valu Fa Ridge</td><td>BABB, MORB, low K andesite, dacite</td><td>Southern Lau basin</td><td>63</td><td>1850</td><td>3.20</td><td>12.10</td><td>0.40</td><td>6.80</td><td>18.10</td><td>21.30</td><td>21.80</td><td>86</td><td>2.68</td><td>300</td><td>450</td><td>78</td><td>22</td><td>3</td><td>&lt;5</td><td>36</td><td>11</td><td>8</td><td>23</td></tr><tr><td>Central Valu Fa Ridge</td><td>BABB, MORB, low K andesite, dacite</td><td>Southern Lau basin</td><td>87</td><td>1750</td><td>5.50</td><td>27.60</td><td>0.30</td><td>7.40</td><td>27.40</td><td>3.80</td><td>10.80</td><td>120</td><td>3.21</td><td>855</td><td>1900</td><td>76</td><td>13</td><td>3</td><td>&lt;5</td><td>16</td><td>125</td><td>19</td><td>24</td></tr><tr><td>Southern Valu Fa Ridge</td><td>BABB, MORB, low K andesite, dacite</td><td>Southern Lau basin</td><td>25</td><td>1850</td><td>1.70</td><td>11.60</td><td>0.70</td><td>32.30</td><td>38.90</td><td>1.80</td><td>3.30</td><td>405</td><td>1.43</td><td>350</td><td>3815</td><td>21</td><td>28</td><td>23</td><td>35</td><td>18</td><td>1</td><td>11</td><td>25</td></tr><tr><td colspan="15"><strong>Arc</strong></td></tr><tr><td>Myojin knoll</td><td>IAB, low K andesite, dacite, Rhyolite</td><td>Izu-Bonin arc</td><td>37</td><td>1300</td><td>5.50</td><td>21.90</td><td>2.30</td><td>10.50</td><td>-</td><td>8.70</td><td>6.70</td><td>1215</td><td>20</td><td>1860</td><td>5045</td><td>3565</td><td>-</td><td>-</td><td>-</td><td>-</td><td>-</td><td>-</td><td>26</td></tr><tr><td>Suiyo Seamount</td><td>IAB, low K andesite, dacite</td><td>Izu-Bonin arc</td><td>13</td><td>1300</td><td>12.80</td><td>17.50</td><td>0.70</td><td>15.00</td><td>-</td><td>-</td><td>&lt;0.1</td><td>160</td><td>27.73</td><td>885</td><td>1170</td><td>585</td><td>4</td><td>19</td><td>1</td><td>120</td><td>-</td><td>15</td><td>27</td></tr><tr><td>Brothers</td><td>IAB, minor BABB, med. K andesite</td><td>Kermadec arc</td><td>9</td><td>1600</td><td>2.80</td><td>3.30</td><td>0.20</td><td>7.40</td><td>-</td><td>-</td><td>31.90</td><td>-</td><td>-</td><td>105</td><td>2155</td><td>-</td><td>66</td><td>39</td><td>-</td><td>-</td><td>-</td><td>-</td><td>28</td></tr><tr><td colspan="15"><strong>Intracontinental back-arc</strong></td></tr><tr><td>Jade site - Izena cauldron</td><td>Basalt, K andesite, dacite, rhyolite, sediments</td><td>Central Okinawa trough</td><td>40</td><td>1400</td><td>3.30</td><td>20.20</td><td>11.80</td><td>6.20</td><td>18.10</td><td>10.10</td><td>7.20</td><td>2305</td><td>3.13</td><td>820</td><td>17500</td><td>6710</td><td>-</td><td>-</td><td>4205</td><td>-</td><td>-</td><td>-</td><td>29</td></tr></tbody></table>

Source of data: (1) = Fouquet et al. 1996; (2, 3, 4, 14) = Fouquet, unpublished data; (5 to 12) = Fouquet et al., 2010; (13, 16, 17, 19, 20, 23, 24, 25, 26, 27, 28, 29) = Hannington et al., 2004, 2005 and references therein; (15) = Bendel et al. 1993; (18) = this study. (21, 22) = Fouquet et al., 1993. MORB = mid-ocean ridge basalt, E-MORB = enriched MORB; BABB = back-arc basin basalt; IAB = Island-arc tholeite.
<table><caption>Table 6</caption><thead><tr><th>Sample</th><th>FU-PL02-07</th><th>FU-PL02-08</th><th>FU-PL02-09</th><th>FU-PL02-11</th></tr></thead><tbody><tr><td>%</td><td></td><td></td><td></td><td></td></tr><tr><td>SiO<sub>2</sub></td><td>86.53</td><td>43.80</td><td>42.83</td><td>26.26</td></tr><tr><td>Al<sub>2</sub>O<sub>3</sub></td><td>0.30</td><td>0.36</td><td>0.49</td><td>0.53</td></tr><tr><td>Fe<sub>2</sub>O<sub>3</sub></td><td>4.61</td><td>34.50</td><td>36.16</td><td>52.55</td></tr><tr><td>MnO</td><td>0.02</td><td>1.40</td><td>1.34</td><td>0.81</td></tr><tr><td>CaO</td><td>0.29</td><td>1.16</td><td>1.33</td><td>1.41</td></tr><tr><td>MgO</td><td>0.48</td><td>2.92</td><td>2.11</td><td>1.36</td></tr><tr><td>K<sub>2</sub>O</td><td>0.15</td><td>0.52</td><td>0.47</td><td>0.35</td></tr><tr><td>Na<sub>2</sub>O</td><td>1.88</td><td>3.40</td><td>3.13</td><td>2.86</td></tr><tr><td>TiO<sub>2</sub></td><td>0.02</td><td>0.02</td><td>0.04</td><td>0.04</td></tr><tr><td>P<sub>2</sub>O<sub>5</sub></td><td>0.12</td><td>0.87</td><td>1.08</td><td>1.00</td></tr><tr><td>SO<sub>4</sub></td><td>0.15</td><td>0.17</td><td>0.14</td><td>0.18</td></tr><tr><td>LOI</td><td>6.01</td><td>10.70</td><td>10.45</td><td>11.27</td></tr><tr><td>Total</td><td>100.56</td><td>99.82</td><td>99.57</td><td>98.62</td></tr><tr><td>ppm</td><td></td><td></td><td></td><td></td></tr><tr><td>V</td><td>10</td><td>171</td><td>106</td><td>211</td></tr><tr><td>Co</td><td>3</td><td>19</td><td>13</td><td>50</td></tr><tr><td>Ni</td><td>2</td><td>30</td><td>30</td><td>27</td></tr><tr><td>Cu</td><td>10</td><td>36</td><td>48</td><td>82</td></tr><tr><td>Zn</td><td>8</td><td>70</td><td>73</td><td>71</td></tr><tr><td>As</td><td>11</td><td>118</td><td>108</td><td>93</td></tr><tr><td>Rb</td><td>4</td><td>9</td><td>8</td><td>6</td></tr><tr><td>Sr</td><td>38</td><td>264</td><td>270</td><td>300</td></tr><tr><td>Y</td><td>&lt;3</td><td>5</td><td>7</td><td>3</td></tr><tr><td>Zr</td><td>&lt;10</td><td>&lt;10</td><td>&lt;10</td><td>&lt;10</td></tr><tr><td>Nb</td><td>1</td><td>1</td><td>1</td><td>1</td></tr><tr><td>Ba</td><td>19</td><td>127</td><td>51</td><td>88</td></tr><tr><td>Ce</td><td>&lt;10</td><td>&lt;10</td><td>&lt;10</td><td>&lt;10</td></tr><tr><td>La</td><td>&lt;6</td><td>6</td><td>10</td><td>&lt;6</td></tr><tr><td>Sc</td><td>&lt;3</td><td>&lt;3</td><td>&lt;3</td><td>&lt;3</td></tr><tr><td>Mo</td><td>6</td><td>46</td><td>44</td><td>49</td></tr><tr><td>Pb</td><td>9</td><td>10</td><td>11</td><td>12</td></tr><tr><td>Sn</td><td>5</td><td>&lt;3</td><td>-</td><td>-</td></tr><tr><td>Sb</td><td>6</td><td>&lt;2</td><td>-</td><td>-</td></tr><tr><td>U</td><td>4</td><td>&lt;2</td><td>3</td><td>-</td></tr></tbody></table>

Table 6

Fouquet et al.
ORGEO-2017-381
<figure><img src="image_27.png" /><figcaption>Figure 22</figcaption></figure>

Fouquet et al.

ORGEO-2017-381

3D Diagram of the current stage of formation of the Kulo Lasi caldera (Stage 4). A: old lava flows. B: fractured volcanic basement. M: magma chamber. R: resurgent dome. C: recent lava flows. Caldera faults: red dotted line = reverse faults; dark blue lines = normal faults. Colored numbers: 1- red arrows: high-temperature hydrothermal fluid generated by deep water-rock reaction. 2- white arrows: seawater heated (>250°C) at shallow levels in contact with the hot recent dyke controlled by the reverse faults (red line). 3- Blue arrow, cold seawater. Black numbers = hydrothermal precipitates: 1- stockwork mineralization (red crosshatching). 2- low-temperature Fe/Mn deposits (brown patches). 3- Low-temperature Si/Fe mineralization (orange patches). 4- native sulfur deposits generated by the discharge of magmatic fluids (yellow dots). 5- recent (< 1 year) black smokers sulfidic chimneys (red triangles). 6- low-temperature silica chimney near the base of the caldera wall (yellow triangles). 7- Diffuse low-temperature venting without precipitates.