<table><caption>Table 1: Compilation of the natural abundances of Ge isotopes determined by different mass spectrometry techniques. The Ge isotope composition of double spike mixtures used is also shown for comparison</caption><thead><tr><th>Ge material</th><th><sup>74</sup>Ge/<sup>70</sup>Ge</th><th>1 s.d.</th><th><sup>73</sup>Ge/<sup>70</sup>Ge</th><th>1 s.d.</th><th><sup>72</sup>Ge/<sup>70</sup>Ge</th><th>1 s.d.</th><th>Method</th><th>Instrument/Lab</th><th>Reference</th></tr></thead><tbody><tr><td>DS (Ge<sup>70</sup>:Ge<sup>73</sup>)</td><td>0.07614</td><td>0.00005</td><td>0.60707</td><td>0.00004</td><td>0.05626</td><td>0.00004</td><td>CSC, Ga</td><td>Neptune/IFREMER</td><td>(1)</td></tr><tr><td>NIST3120a</td><td>1.76094</td><td>0.00003</td><td>0.37335</td><td>0.00001</td><td>1.32901</td><td>0.00002</td><td>CSC, Ga</td><td>Neptune/IFREMER</td><td>(1)</td></tr><tr><td>NIST3120a</td><td>1.76137</td><td>0.00014</td><td>0.37447</td><td>0.00003</td><td>1.32934</td><td>0.00010</td><td>HG, Ga</td><td>Neptune/WHOI</td><td>(2)</td></tr><tr><td>NIST3120a</td><td>1.76426</td><td>0.00139</td><td>0.37484</td><td>0.00028</td><td>1.33068</td><td>0.00096</td><td>HG, Cu</td><td>Neptune/WHOI</td><td>(2)</td></tr><tr><td>NIST3120a</td><td>1.76738</td><td>0.00509</td><td>0.37494</td><td>0.00065</td><td>1.33145</td><td>0.00121</td><td>CSC, Ga</td><td>Isoprobe/CRPG</td><td>(2)</td></tr><tr><td>NIST3120a</td><td>1.76460</td><td>0.00021</td><td>0.37426</td><td>0.00004</td><td>1.33073</td><td>0.00009</td><td>CSC, Ga</td><td>Nu Plasma/LCABIE</td><td>(2)</td></tr><tr><td>NIST3120a</td><td>1.76223</td><td>0.00057</td><td>0.37411</td><td>0.00014</td><td>1.32979</td><td>0.00014</td><td>HG, Ga</td><td>Nu Plasma/LCABIE</td><td>(2)</td></tr><tr><td>Aldrich #01704KZ</td><td>1.76367</td><td>0.00283</td><td>0.37370</td><td>0.00151</td><td>1.33106</td><td>0.00070</td><td>CSC, Ga</td><td>Isoprobe/CRPG</td><td>(2)</td></tr><tr><td>In house</td><td>1.77000</td><td>0.00014</td><td>0.37520</td><td>0.00015</td><td>1.33300</td><td>0.00070</td><td>Ga</td><td>Nu Plasma/OSU</td><td>(3)</td></tr><tr><td>JMC #301230Sn</td><td>1.76641</td><td>0.00223</td><td>0.37499</td><td>0.01331</td><td>1.33199</td><td>0.00092</td><td>CSC, Ga</td><td>Isoprobe/CRPG</td><td>(2)</td></tr><tr><td>JMC #301230Sn</td><td>1.74337</td><td>-</td><td>0.37189</td><td>-</td><td>1.32360</td><td>-</td><td>Ga</td><td>VG-P54</td><td>(4)</td></tr><tr><td>Ge metal (Aldrich)</td><td>1.77937</td><td>-</td><td>0.37807</td><td>-</td><td>1.33712</td><td>-</td><td>CSC, Ga</td><td>Neptune</td><td>(5)</td></tr><tr><td>In house</td><td>1.69449</td><td>0.00598</td><td>0.36383</td><td>0.00090</td><td>1.30315</td><td>0.00276</td><td></td><td>TIMS</td><td>(6)</td></tr><tr><td>In house</td><td>1.74228</td><td>0.00370</td><td>0.37107</td><td>0.00067</td><td>1.31927</td><td>0.00491</td><td></td><td>TIMS-VG-354</td><td>(7)</td></tr><tr><td>In house</td><td>1.73038</td><td>-</td><td>0.37189</td><td>-</td><td>1.31833</td><td>-</td><td></td><td>TIMS</td><td>(8)</td></tr><tr><td>In house</td><td>1.78101</td><td>-</td><td>0.37821</td><td>-</td><td>1.33699</td><td>-</td><td></td><td>gas MS</td><td>(9)</td></tr><tr><td>In house</td><td>1.71516</td><td>-</td><td>0.36800</td><td>-</td><td>1.30938</td><td>-</td><td></td><td>SIMS</td><td>(10)</td></tr></tbody></table>

(1) Escoube et al., 2012; (2) this study; (3) Siebert et al., 2006; (4) Hirata, 1997; (5) Yang and Meija, 2010

(6) Green et al., 1986; (7) Chang et al., 1999; (8) Shima, 1963; (9) Reynolds et al., 1953; (10) Nishimura et al. 1988

CSC: cyclonic spray chamber; HG: hydride generation

s.d.: standard deviation

DS (Ge70:Ge73): Ge double spike
<table><caption>Table 2: Average compositions of Ge isotope standards used by different research groups normalized against NIST 3120a isotopic standard.</caption><thead><tr><th>Lab</th><th>Method</th><th>nb#</th><th>δ<sup>74/70</sup>Ge<br>NIST3120a</th><th>2s</th><th>δ<sup>73/70</sup>Ge<br>NIST3120a</th><th>2s</th><th>δ<sup>72/70</sup>Ge<br>NIST3120a</th><th>2s</th><th>δ<sup>74/72</sup>Ge<br>NIST3120a</th><th>2s</th></tr></thead><tbody><tr><td colspan="11"><em>"ARISTAR" standard</em></td></tr><tr><td>#1</td><td>HG SSB</td><td>11</td><td>-0.64</td><td>0.18</td><td>-0.54</td><td>0.18</td><td>-0.38</td><td>0.26</td><td>-0.28</td><td>0.03</td></tr><tr><td>#1</td><td>HG Ga</td><td>11</td><td>-0.57</td><td>0.08</td><td>nd</td><td></td><td>-0.30</td><td>0.09</td><td>-0.28</td><td>0.04</td></tr><tr><td>#2</td><td>CSC SSB</td><td>4</td><td>-0.59</td><td>0.02</td><td>-0.47</td><td>0.04</td><td>-0.33</td><td>0.01</td><td>-0.26</td><td>0.01</td></tr><tr><td>#2</td><td>CSC DS</td><td>4</td><td>-0.61</td><td>0.11</td><td>-0.46</td><td>0.08</td><td>-0.31</td><td>0.06</td><td>-0.30</td><td>0.06</td></tr><tr><td>#3</td><td>CSC Ga</td><td>6</td><td>-0.76</td><td>0.28</td><td>-0.61</td><td>0.20</td><td>-0.41</td><td>0.17</td><td>nd</td><td></td></tr><tr><td>#3</td><td>CSC SSB</td><td>6</td><td>-0.75</td><td>0.28</td><td>-0.63</td><td>0.20</td><td>-0.63</td><td>0.17</td><td>nd</td><td></td></tr><tr><td colspan="11"><em>"JMC" standard</em></td></tr><tr><td>#1</td><td>HG SSB</td><td>4</td><td>-0.32</td><td>0.10</td><td>-0.23</td><td>0.12</td><td>-0.16</td><td>0.07</td><td>-0.16</td><td>0.05</td></tr><tr><td>#1</td><td>HG Ga</td><td>4</td><td>-0.31</td><td>0.29</td><td>nd</td><td></td><td>-0.15</td><td>0.27</td><td>-0.18</td><td>0.06</td></tr><tr><td>#2</td><td>CSC SSB</td><td>4</td><td>-0.23</td><td>0.02</td><td>-0.14</td><td>0.04</td><td>-0.11</td><td>0.03</td><td>-0.12</td><td>0.03</td></tr><tr><td>#2</td><td>CSC DS</td><td>4</td><td>-0.32</td><td>0.07</td><td>-0.24</td><td>0.05</td><td>-0.16</td><td>0.04</td><td>-0.16</td><td>0.04</td></tr><tr><td>#3</td><td>CSC Ga</td><td>8</td><td>-0.37</td><td>0.04</td><td>-0.25</td><td>0.02</td><td>-0.19</td><td>0.07</td><td>nd</td><td></td></tr><tr><td>#3</td><td>CSC SSB</td><td>8</td><td>-0.37</td><td>0.16</td><td>-0.28</td><td>0.14</td><td>-0.20</td><td>0.06</td><td>nd</td><td></td></tr><tr><td colspan="11"><em>"SPEX" standard</em></td></tr><tr><td>#1</td><td>HG SSB</td><td>1</td><td>-0.59</td><td>nd</td><td>nd</td><td></td><td>-0.28</td><td>nd</td><td>-0.31</td><td>nd</td></tr><tr><td>#1</td><td>HG Ga</td><td>1</td><td>-0.60</td><td>nd</td><td>nd</td><td></td><td>-0.28</td><td>nd</td><td>-0.31</td><td>nd</td></tr><tr><td>#1</td><td>HG SSB</td><td>5</td><td>-0.84</td><td>0.16</td><td>nd</td><td></td><td>-0.48</td><td>0.10</td><td>-0.36</td><td>0.08</td></tr><tr><td>#1</td><td>HG Ga</td><td>5</td><td>-0.81</td><td>0.11</td><td>nd</td><td></td><td>-0.46</td><td>0.09</td><td>-0.35</td><td>0.04</td></tr><tr><td>#2</td><td>CSC SSB</td><td>3</td><td>-0.61</td><td>0.04</td><td>-0.51</td><td>0.09</td><td>-0.33</td><td>0.03</td><td>-0.28</td><td>0.05</td></tr><tr><td>#2</td><td>CSC DS</td><td>4</td><td>-0.63</td><td>0.13</td><td>-0.48</td><td>0.10</td><td>-0.32</td><td>0.06</td><td>-0.31</td><td>0.06</td></tr><tr><td>#3</td><td>CSC Ga</td><td>10</td><td>-0.81</td><td>0.19</td><td>-0.62</td><td>0.24</td><td>-0.41</td><td>0.11</td><td>nd</td><td></td></tr><tr><td>#3</td><td>CSC SSB</td><td>10</td><td>-0.79</td><td>0.18</td><td>-0.62</td><td>0.16</td><td>-0.41</td><td>0.12</td><td>nd</td><td></td></tr><tr><td>#4</td><td>CSC SSB</td><td>14</td><td>-0.64</td><td>0.42</td><td>nd</td><td></td><td>nd</td><td>0.00</td><td>-0.23</td><td>0.26</td></tr><tr><td>#4</td><td>CSC Ga</td><td>14</td><td>-0.79</td><td>0.18</td><td>nd</td><td></td><td>nd</td><td>0.00</td><td>-0.31</td><td>0.04</td></tr><tr><td colspan="11"><em>"ALDRICH" standard</em></td></tr><tr><td>#2</td><td>CSC SSB</td><td>4</td><td>-1.88</td><td>0.03</td><td>-1.46</td><td>0.07</td><td>-0.97</td><td>0.02</td><td>-0.92</td><td>0.03</td></tr><tr><td>#2</td><td>CSC DS</td><td>4</td><td>-2.14</td><td>0.06</td><td>-1.61</td><td>0.05</td><td>-1.08</td><td>0.03</td><td>-1.05</td><td>0.03</td></tr><tr><td>#2</td><td>HG DS</td><td>6</td><td>-1.90</td><td>0.10</td><td>-1.44</td><td>0.08</td><td>-0.96</td><td>0.05</td><td>-0.94</td><td>0.05</td></tr><tr><td>#3</td><td>CSC Ga</td><td>84</td><td>-2.08</td><td>0.26</td><td>-1.61</td><td>0.20</td><td>-1.08</td><td>0.16</td><td>nd</td><td></td></tr><tr><td>#3</td><td>CSC SSB</td><td>84</td><td>-2.05</td><td>0.22</td><td>-1.60</td><td>0.20</td><td>-1.06</td><td>0.14</td><td>nd</td><td></td></tr></tbody></table>

Lab 1: WHOI; Lab 2: IFREMER; Lab 3: CRPG; Lab 4: LCBIE. "nd", not determined.

SSB: sample-sample bracketing; DS: double spike correction; Ga: external normalisation to Ga.

CSC: cyclonic spray chamber; HG: hydride generation
<table><caption>Table 3: Compilation of published and unpublished values for georeference materials</caption><thead><tr><th>SiO<sub>2</sub><br>(wt%)</th><th>Ref</th><th>Ge<br>(ppm)</th><th>Ref</th><th>δ<sup>74/70</sup>Ge<br>NIST3120a</th><th>2sd</th><th>Ref</th><th>SiO<sub>2</sub><br>(wt%)</th><th>Ref</th><th>Ge<br>(ppm)</th><th>Ref</th><th>δ<sup>74/70</sup>Ge<br>NIST3120a</th><th>2sd</th><th>Ref</th></tr></thead><tbody><tr><td colspan="13" style="text-align: center; font-weight: bold;">BHVO-1 (Hawaiian basalt)</td></tr><tr><td rowspan="3">49.9</td><td rowspan="3">a</td><td>1.64</td><td>a</td><td>0.55</td><td rowspan="3">0.15</td><td rowspan="3">g</td><td rowspan="3">40.41</td><td rowspan="3">a</td><td>0.88</td><td>a</td><td>0.76</td><td rowspan="3">0.13</td><td rowspan="3">k</td></tr><tr><td>1.55</td><td>c</td><td></td><td>0.84</td><td>c</td><td>0.65</td><td>0.28</td><td>g</td></tr><tr><td>1.58</td><td>i</td><td>0.37</td><td>0.83</td><td>i</td><td>0.50</td><td>0.06</td><td>i</td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">BHVO-2 (Hawaiian basalt)</td></tr><tr><td rowspan="8">49.9</td><td rowspan="8">e</td><td>1.52</td><td>k</td><td>0.55</td><td rowspan="8">0.13</td><td rowspan="8">k</td><td rowspan="8">41.71</td><td rowspan="8">a</td><td>0.94</td><td>a</td><td>0.69</td><td rowspan="8">0.13</td><td rowspan="8">k</td></tr><tr><td>1.63</td><td>l</td><td>0.54</td><td>0.82</td><td>k</td><td>0.64</td><td>0.30</td><td>h</td></tr><tr><td>1.61</td><td>l</td><td>0.52</td><td></td><td></td><td>0.59</td><td>0.30</td><td>h</td></tr><tr><td>1.64</td><td>l</td><td>0.43</td><td></td><td></td><td>0.74</td><td>0.13</td><td>g</td></tr><tr><td></td><td></td><td>0.53</td><td></td><td></td><td>0.81</td><td>i</td><td>0.46</td><td>0.20</td><td>i</td></tr><tr><td></td><td></td><td>0.55</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td></td><td>0.64</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td></td><td>0.51</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">BIR-1 (Icelandic basalt)</td></tr><tr><td rowspan="6">47.96</td><td rowspan="6">e</td><td>1.50</td><td>a</td><td>0.74</td><td rowspan="6">0.13</td><td rowspan="6">k</td><td rowspan="6">46.3</td><td rowspan="6">a</td><td>0.80</td><td>a</td><td>0.67</td><td rowspan="6">0.13</td><td rowspan="6">k</td></tr><tr><td>1.45</td><td>b</td><td>0.60</td><td>0.93</td><td>c</td><td>0.66</td><td>0.13</td><td>g</td></tr><tr><td>1.53</td><td>b</td><td>0.56</td><td></td><td></td><td>0.84</td><td>k</td><td></td><td></td></tr><tr><td>1.49</td><td>c</td><td>0.64</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>1.52</td><td>d</td><td>0.57</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>1.52</td><td>i</td><td>0.57</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">BCR-1 (Columbia River basalt)</td></tr><tr><td rowspan="5">54.11</td><td rowspan="5">e</td><td>1.50</td><td>a</td><td>0.65</td><td rowspan="5">0.13</td><td rowspan="5">k</td><td rowspan="5">50.9</td><td rowspan="5">a</td><td>4.50</td><td>a</td><td>2.49</td><td rowspan="5">0.13</td><td rowspan="5">k</td></tr><tr><td>1.42</td><td>b</td><td>0.54</td><td>4.02</td><td>k</td><td>2.34</td><td>0.21</td><td>h</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td>2.51</td><td>0.55</td><td>g</td></tr><tr><td>1.45</td><td>c</td><td>0.47</td><td></td><td></td><td>2.43</td><td>0.60</td><td>g</td></tr><tr><td>1.36</td><td>k</td><td>0.54</td><td></td><td></td><td>2.42</td><td>0.26</td><td>g</td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">BE-N (Vosges basalt)</td></tr><tr><td>38.2</td><td>a</td><td>1.16</td><td>i</td><td>0.55</td><td>0.14</td><td>i</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">G-2 (granite)</td></tr><tr><td rowspan="3">69.1</td><td rowspan="3">a</td><td>1.02</td><td>b</td><td>0.39</td><td rowspan="3">0.34</td><td rowspan="3">g</td><td rowspan="3">41.2</td><td rowspan="3">a</td><td>24.00</td><td>a</td><td>1.11</td><td rowspan="3">0.13</td><td rowspan="3">k</td></tr><tr><td>0.94</td><td>b</td><td></td><td>22.00</td><td>f</td><td>1.03</td><td>0.25</td><td>j</td></tr><tr><td>0.92</td><td>k</td><td></td><td></td><td></td><td>1.01</td><td>0.27</td><td>j</td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">GH (granite)</td></tr><tr><td rowspan="3">75.8</td><td rowspan="3">e</td><td>2.18</td><td>c</td><td>0.74</td><td rowspan="3">0.13</td><td rowspan="3">k</td><td rowspan="3">49.28</td><td rowspan="3">a</td><td>1.56</td><td>l</td><td>0.85</td><td rowspan="3">0.18</td><td rowspan="3">l</td></tr><tr><td>1.63</td><td>k</td><td>0.55</td><td>1.64</td><td></td><td>0.91</td><td>0.09</td><td>l</td></tr><tr><td>1.84</td><td>i</td><td>0.63</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">DNC-1 (granite)</td></tr><tr><td rowspan="2">47.15</td><td rowspan="2">e</td><td>1.30</td><td>a</td><td>0.56</td><td rowspan="2">0.13</td><td rowspan="2">k</td><td rowspan="2">13.9</td><td rowspan="2">a</td><td>n.d.</td><td></td><td>1.22</td><td rowspan="2">0.16</td><td rowspan="2">m</td></tr><tr><td>1.26</td><td>b</td><td>0.76</td><td>n.d.</td><td></td><td>1.44</td><td>0.18</td><td>m</td></tr><tr><td>47.04</td><td>a</td><td>1.28</td><td>k</td><td>0.74</td><td>0.31</td><td>g</td><td>n.d.</td><td></td><td>1.24</td><td>0.16</td><td>m</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td><td>0.61</td><td>0.42</td><td>g</td><td>n.d.</td><td></td><td>1.17</td><td>0.20</td><td>m</td><td></td><td></td></tr><tr><td colspan="13" style="text-align: center; font-weight: bold;">Nod-P1 (Pacific Mn nodule)</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td>0.54</td><td>n</td><td>-0.08</td><td></td><td></td><td></td><td>0.18</td><td>l</td><td></td></tr></tbody></table>

References: a: Govindaraju (1994); b: Mortlock and Froelich (1987, 1996); c: Halicz (1990); d: Kurtz et al. (2002); e: USGS; f: Frei and Polat (2007); g: Rouxel et al. (2006); h: Escoube et al. (2012) (double-spike, WHOI); i: Luais (2012); j: Rouxel, unpublished; k: Escoube et al. (2012) (double-spike, Ifremer); l: Lalonde and Rouxel, unpublished; m: Qi et al. (2011); n: Axelsson et al., 2002.
<table><caption>Table 4: Lattice parameters for Ge in metal, silicate, oxides and sulfides.</caption><thead><tr><th></th><th>Oxidation state</th><th>Ge-Fe (Å)</th><th>Ge-O (Å)</th><th>Ge-S (Å)</th><th>References</th></tr></thead><tbody><tr><td>Fe-Ni metal</td><td>0</td><td>2.494</td><td></td><td></td><td>Cavell et al., 2004</td></tr><tr><td>Silicates</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>olivine</td><td>4<sup>+</sup></td><td></td><td>1.79</td><td></td><td>Li et al., 2009</td></tr><tr><td>K-felspar</td><td>4<sup>+</sup></td><td></td><td>1.758</td><td></td><td>Li et al., 2009</td></tr><tr><td>Albite</td><td>4<sup>+</sup></td><td></td><td>1.76</td><td></td><td>Li et al., 2009</td></tr><tr><td>Quartz</td><td>4<sup>+</sup></td><td></td><td>1.753</td><td></td><td>Li et al., 2009</td></tr><tr><td>Oxides</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Brunogierite<br>(Fe<sup>2+</sup>)<sub>2</sub>Ge<sup>4+</sup>O<sub>4</sub></td><td>4<sup>+</sup></td><td></td><td>1.771</td><td></td><td>Cempirek and Groat, 2013</td></tr><tr><td>Sulfides</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>[Ge(II)S<sub>4</sub>Zn<sub>2</sub>]<sup>2-</sup></td><td>2<sup>+</sup></td><td></td><td></td><td>2.257</td><td>Li et al., 2009</td></tr><tr><td>[Ge(II)S<sub>4</sub>Zn<sub>4</sub>]<sup>2-</sup></td><td>2<sup>+</sup></td><td></td><td></td><td>2.267</td><td>Li et al., 2009</td></tr><tr><td>[Ge(IV)S<sub>4</sub>Zn<sub>2</sub>]<sup>0</sup></td><td>4<sup>+</sup></td><td></td><td></td><td>2.275</td><td>Li et al., 2009</td></tr><tr><td>Sphalerite</td><td>4<sup>+</sup></td><td></td><td></td><td></td><td>Cook et al., 2015<br>Belissont et al., 2016</td></tr></tbody></table>
<table><caption>Table 5: Experimental determination of Ge mineral-liquid partition coefficients in silicate minerals as a function of temperature and pressure.</caption><thead><tr><th>Mineral</th><th>D (Ge) <sub>mineral/liquid</sub></th><th>Temperature/Pressure</th><th>References</th><th>D(Ge)/D(Si) Malvin and Drake (1987)</th></tr></thead><tbody><tr><td>Anorthite</td><td>0.5</td><td>1300°C</td><td>Malvin and Drake, 1987</td><td>0.58±0.05</td></tr><tr><td>Olivine</td><td>0.65</td><td>1300°C</td><td>Malvin and Drake, 1987</td><td>0.73±0.02</td></tr><tr><td></td><td>0.68±0.06</td><td>1300-1450°C, 1 atm</td><td>Capobianco and Watson, 1982</td><td></td></tr><tr><td></td><td>0.54±0.04</td><td>20kbar</td><td></td><td></td></tr><tr><td></td><td>0.43±0.01</td><td>1450-1650°C, 3GPa (30 kbar)</td><td>Davis et al., 2013</td><td></td></tr><tr><td></td><td>0.55</td><td>1100°C- 2 GPa</td><td>Adam and Green, 2006</td><td></td></tr><tr><td></td><td>0.95±0.04</td><td>1075°C- 1 GPa</td><td>Adam and Green, 2006</td><td></td></tr><tr><td>Clinopyroxene</td><td>1.1 to 1.52</td><td>Variable P, T 1075 to 1170°C - 1-3 GPa</td><td>Adam and Green, 2006</td><td></td></tr><tr><td>Diopside</td><td>1.4</td><td>1300°C</td><td>Malvin and Drake, 1987</td><td>1.4±0.02</td></tr><tr><td></td><td>0.87±0.03</td><td>1450-1650°C, 3GPa</td><td>Davis et al., 2013</td><td></td></tr><tr><td>Orthopyroxene</td><td>0.87±0.02</td><td>1450-1650°C, 3GPa</td><td>Davis et al., 2013</td><td></td></tr><tr><td></td><td>0.75±0.28</td><td></td><td></td><td></td></tr><tr><td></td><td>1.36±0.07</td><td>1160°C- 2.7 GPa</td><td>Adam and Green, 2006</td><td></td></tr><tr><td>Amphibole</td><td>1.61±0.06</td><td>1050°C- 2 GPa</td><td>Adam and Green, 2006</td><td></td></tr><tr><td></td><td>1.109-0.03</td><td>1025°C - 1 GPa</td><td></td><td></td></tr><tr><td>Mica</td><td>0.51-0.54± 0.02-0.05</td><td>1160-1100°C- 2.7-2.5 GPa</td><td>Adam and Green, 2006</td><td></td></tr><tr><td></td><td>1.08±0.05</td><td>1025°C - 1 GPa</td><td></td><td></td></tr><tr><td>Spinel</td><td>0.11</td><td>1300°C</td><td>Malvin and Drake, 1987</td><td>21±12</td></tr><tr><td></td><td>0.40±0.04</td><td>1450-1650°C, 3GPa</td><td>Davis et al., 2013</td><td></td></tr><tr><td>Garnet</td><td>1.51±0.03</td><td>1450-1650°C, 3GPa</td><td>Davis et al., 2013</td><td></td></tr></tbody></table>

D(Ge)mineral-liquid values for fractional crystallisation (Malvin and Drake, 1987; Capobianco and Watson, 1982; Adam and Green 2006) and partial melting (Davis et al. 2013).

D(Ge)/D(Si) : exchange coefficient for Ge and Si.
<table><caption>Table 6: Ge isotope composition and Ge concentration of biogenic opal</caption><thead><tr><th>δ<sup>74/70</sup>Ge<br>NIST3120a</th><th>1s</th><th>Ge (ppm)</th><th>Specimen</th><th>Ref</th></tr></thead><tbody><tr><td colspan="5"><strong>North East Pacific (34°45′N; 123°W); 4000m delp</strong></td></tr><tr><td>2.33</td><td>0.18</td><td>0.21</td><td>Hyalonema bianchoratum</td><td>(1)</td></tr><tr><td>2.46</td><td>0.15</td><td>0.21</td><td>Hyalonema bianchoratum</td><td>(1)</td></tr><tr><td>2.60</td><td>0.12</td><td>0.23</td><td>Hyalonema bianchoratum</td><td>(1)</td></tr><tr><td>2.42</td><td>0.12</td><td>0.23</td><td>Hyalonema bianchoratum</td><td>(1)</td></tr><tr><td>2.36</td><td>0.12</td><td>0.27</td><td>Hyalonema bianchoratum</td><td>(1)</td></tr><tr><td>2.21</td><td>0.12</td><td>0.22</td><td>Hyalonema bianchoratum</td><td>(1)</td></tr><tr><td>1.56</td><td>0.22</td><td>0.26</td><td>Bathydorus laevis ssp. spinosu</td><td>(1)</td></tr><tr><td colspan="5"><strong>North East Pacific (34°45′N; 123°W); 4000m delp</strong></td></tr><tr><td>2.19</td><td>0.22</td><td>0.18</td><td>Axinella mexicana sp.</td><td>(1)</td></tr><tr><td colspan="5"><strong>Southern Ocean - Burdwood Bank</strong></td></tr><tr><td>2.24</td><td>0.04</td><td>0.13</td><td>Unidentified Hexactinellid</td><td>(2)</td></tr><tr><td>2.19</td><td>0.05</td><td>0.16</td><td>Unidentified Demosponge</td><td>(2)</td></tr><tr><td>2.13</td><td>0.04</td><td>0.19</td><td>Mycalidae</td><td>(2)</td></tr><tr><td>1.79</td><td>0.05</td><td>0.18</td><td>Unidentified Demosponge</td><td>(2)</td></tr><tr><td>2.22</td><td>0.04</td><td>0.20</td><td>Unidentified Demosponge</td><td>(2)</td></tr><tr><td colspan="5"><strong>Southern Ocean - Drake Passage</strong></td></tr><tr><td>2.07</td><td>0.04</td><td>0.15</td><td>Unidentified Demosponge</td><td>(2)</td></tr><tr><td>2.14</td><td>0.07</td><td>0.15</td><td>Unidentified Demosponge</td><td>(2)</td></tr><tr><td>2.11</td><td>0.03</td><td>0.20</td><td>Unidentified Demosponge</td><td>(2)</td></tr><tr><td>1.79</td><td>0.02</td><td>0.25</td><td>Unidentified Demosponge</td><td>(2)</td></tr><tr><td>2.33</td><td>0.08</td><td>0.18</td><td>Acoelocalyx</td><td>(2)</td></tr><tr><td colspan="5"><strong>Southern Ocean - Scotia Sea</strong></td></tr><tr><td>2.11</td><td>0.02</td><td>0.35</td><td>Acoelocalyx</td><td>(2)</td></tr><tr><td>2.91</td><td>0.06</td><td>0.05</td><td>Acoelocalyx</td><td>(2)</td></tr><tr><td>2.45</td><td>0.09</td><td>0.16</td><td>Acoelocalyx</td><td>(2)</td></tr><tr><td colspan="5"><strong>Southern Ocean, Indian Sector</strong></td></tr><tr><td>2.51</td><td>0.27</td><td>0.76</td><td></td><td>(3)</td></tr><tr><td>2.82</td><td>0.19</td><td>0.78</td><td>Holocene diatoms, Core</td><td>(3)</td></tr><tr><td>2.99</td><td>0.05</td><td>0.90</td><td>RC11-94</td><td>(3)</td></tr><tr><td>2.92</td><td>0.07</td><td>0.67</td><td></td><td>(3)</td></tr></tbody></table>

Reference: (1) Rouxel et al. (2006); (2) Guillermic et al. (2016); (3)

Rouxel and De La Rocha, unpublished (pooled cleaned diatoms studied in De La Rocha et al., 1998)