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Table 4

Whole-rock trace element composition recalculated on an anhydrous basis. Key race element ratios normalized to the primitive mantle composition (McDonough and Sun, 1995) have also been calculated. < d.l: values below detection limit. Grt Lrz: Garnet Lherzolite; Spl Hrz: Spinel Harzburgite; Phl Hrz: Phlogopite–chromite Harzburgite; Srp: Serpentinite.

Analyses roche totale en éléments traces, recalculées sur une base anhydre. < d.l. : valeurs inférieures à la limite de détection. Grt Lrz : Lherzolite à grenat ; Spl Hrz : Harzburgite à spinelle ; Phl Hrz : Harzburgite à phlogopite–chromite ; Srp : Serpentinite.

Sample JB-19-20 JB-19-23 JB-19-31 JB-19-33 JB-19-34 JB-20-06 JB-20-12 JB-20-13 JB-20-14 JB-19-21 JB-19-22 JB-18-27 JB-19-45 JB-19-48 JB-19-49
Type Grt Lrz Grt Lrz Grt Lrz Grt Lrz Grt Lrz Grt Lrz Grt Lrz Grt Lrz Grt Lrz Phl Hrz Spl.Hrz Srp Srp Srp Srp
As 0.92 90.21 2.12 3.88 3.84 5.81 5.16 1.08 4.07 12.30 2.76 26.93 78.75 496.29 65.25
Ba 22.1 < d.l 21.6 < d.l < d.l < d.l < d.l < d.l 50.0 171.5 26.9 < d.l 9.6 < d.l < d.l
Be < d.l 0.91 0.55 < d.l 0.71 0.26 0.95 0.15 0.49 1.18 0.32 0.16 0.50 0.21 0.09
Bi < d.l 0.07 0.75 0.09 0.10 0.06 < d.l 0.08 0.26 0.31 1.21 0.12 0.42 1.09 0.13
Cd 0.03 0.03 0.08 0.04 < d.l 0.03 0.03 0.06 0.06 0.07 < d.l 1.89 0.09 < d.l < d.l
Co 101.9 110.8 97.9 103.5 105.1 101.4 100.3 99.7 111.8 129.2 111.8 121.2 113.6 119.8 81.0
Cr 2718 2803 2426 2499 2563 2598 2710 2871 2723 5674 2705 3038 2815 2772 2675
Cs 1.52 7.90 3.17 1.30 3.65 2.63 2.56 0.66 1.51 4.02 5.96 1.46 3.56 0.47 0.20
Cu 7.33 5.95 8.85 8.51 3.49 6.55 5.69 13.74 14.13 5.59 5.81 < d.l 3.35 < d.l
Ga 3.0 2.2 4.0 3.4 3.1 2.6 3.6 3.6 2.5 2.1 1.9 1.1 1.4 1.5 0.8
Ge 0.85 2.18 1.02 0.88 0.93 0.95 1.01 0.92 0.96 2.13 0.88 1.03 1.20 1.42 1.02
Hf 0.14 0.09 0.32 0.20 0.18 0.19 0.20 0.25 0.31 0.55 0.18 0.05 < d.l 0.13 < d.l
Nb 0.08 0.05 0.37 0.07 0.09 0.06 0.03 0.08 0.37 0.88 0.63 0.06 0.19 0.18 0.08
Ni 1979 2129 1891 1909 2038 2064 2005 1865 2157 2788 2104 2088 2171 2201 2322
Pb 1.57 2.42 1.57 0.58 0.60 11.88 5.97 0.59 4.91 1.84 1.44 3.15 2.62 1.35 < d.l
Rb 1.09 5.68 14.81 2.38 4.15 3.36 4.24 2.52 7.76 34.93 17.31 0.99 17.70 0.29 0.28
Sb 0.07 2.00 0.13 0.12 3.09 2.07 1.07 0.35 0.41 3.78 0.63 0.81 4.66 7.69 9.51
Sc 15.0 11.8 15.2 15.5 15.0 13.1 16.4 19.2 13.0 3.2 12.4 12.4 12.3 10.1 7.5
Sn < d.l < d.l 1.64 < d.l < d.l < d.l < d.l < d.l 0.93 < d.l 0.34 0.66 0.46 0.43 < d.l
Sr 9.7 11.1 8.0 10.0 17.8 12.3 11.6 9.6 29.9 7.0 15.2 13.8 9.0 5.6 6.6
Ta 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0
Th 0.50 0.08 0.65 0.03 0.03 0.08 0.05 0.48 1.24 0.55 0.08 0.04 0.37 0.08
U 0.11 0.05 0.38 0.03 0.02 0.04 0.06 0.11 0.37 0.80 0.32 0.37 0.11 0.10 0.06
V 63.3 46.5 69.4 70.4 65.6 55.9 74.8 79.0 53.4 15.9 41.1 34.0 42.3 35.5 27.0
W < d.l 3.3 4.3 < d.l < d.l < d.l < d.l < d.l < d.l < d.l 1.3 11.7 1.0 3.0 6.2
Y 2.70 1.92 4.90 3.19 3.16 2.28 3.54 4.36 1.57 2.47 1.28 0.66 0.31 1.16 0.33
Zn 56.8 61.0 68.4 54.4 53.9 59.7 71.5 62.1 72.4 99.9 54.1 87.4 49.3 67.0 62.2
Zr 4.1 2.8 10.8 7.2 6.2 6.7 6.7 8.5 10.4 17.7 6.5 2.2 < d.l 4.8 < d.l
La 0.930 0.293 1.053 0.235 0.210 0.186 0.434 0.329 1.356 1.771 1.949 0.389 0.152 0.750 0.503
Ce 1.866 0.696 2.499 0.762 0.665 0.601 0.999 0.986 4.099 4.206 4.936 0.581 0.397 1.543 0.936
Pr 0.234 0.106 0.367 0.141 0.117 0.110 0.159 0.172 0.658 0.589 0.620 0.088 0.052 0.200 0.118
Nd 1.039 0.526 1.810 0.807 0.665 0.599 0.839 0.895 3.067 2.577 2.266 0.359 0.190 0.833 0.464
Sm 0.291 0.202 0.608 0.298 0.250 0.232 0.317 0.353 0.859 0.615 0.402 0.075 0.043 0.204 0.101
Eu 0.090 0.084 0.158 0.121 0.120 0.102 0.146 0.139 0.176 0.085 0.084 0.018 0.038 0.111 0.082
Gd 0.356 0.252 0.707 0.405 0.362 0.299 0.427 0.497 0.604 0.525 0.270 0.083 0.031 0.196 0.082
Tb 0.064 0.047 0.128 0.075 0.066 0.056 0.086 0.098 0.069 0.079 0.039 0.014 0.005 0.032 0.011
Dy 0.465 0.326 0.839 0.505 0.473 0.404 0.596 0.719 0.311 0.473 0.227 0.091 0.046 0.207 0.062
Ho 0.107 0.074 0.185 0.117 0.111 0.089 0.139 0.166 0.058 0.094 0.047 0.023 0.012 0.046 0.013
Er 0.294 0.216 0.509 0.330 0.317 0.254 0.396 0.477 0.156 0.242 0.131 0.066 0.040 0.126 0.036
Tm 0.049 0.033 0.080 0.053 0.050 0.040 0.061 0.074 0.023 0.037 0.022 0.012 0.007 0.020 0.005
Yb 0.312 0.219 0.532 0.344 0.327 0.267 0.393 0.482 0.164 0.257 0.153 0.085 0.059 0.123 0.035
Lu 0.049 0.036 0.083 0.051 0.055 0.041 0.061 0.076 0.025 0.042 0.027 0.015 0.011 0.019 0.007
(Th/Nb)N 54.857 13.843 14.605 2.671 4.917 21.938 5.354 10.796 11.709 7.288 11.542 1.711 16.961 7.748
(Th/Yb)N 9.328 2.119 7.099 0.484 0.737 1.191 0.644 16.988 27.870 20.825 5.306 3.768 17.542 12.749
(Th/La)N 4.358 2.204 5.000 1.051 1.474 1.500 1.315 2.869 5.635 2.273 1.619 2.030 3.996 1.240
(La/Yb)N 2.140 0.962 1.420 0.490 0.460 0.500 0.794 0.490 5.921 4.946 9.162 3.278 1.856 4.390 10.279

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