Lake Pavin History, geology, biogeochemistry, and sedimentology of a deep meromictic maar lake

Table 7.1 Major and trace element composition of Pavin group magmas

Sample Montcineyre Estivadoux Montchal Pavin

P13-8 P7699 P13- 7TE

P13-

7Sa P13-7Sb P7698 P13-4 P13-5 P13-9 KBP2b* KBP3b* PAV-0 PAV1-1

Lava Flow Scoria fall deposit

Lava Flow (couze

Pavin) Caulifl ower bombs

Plinian

Fall

Red (Top) Black

(bottom)

Besse en Chandesse Sanner (1981, unpub.) in Bourdier
( 1980 )
SiO 2 43.80 49.20 57.71 58.45
TiO 2 2.80 2.60 1.37 1.30
Al 2 O 3 14.10 16.30 18.01 18.05
Fe 2 O 3 5.96 5.02
FeO 5.80 4.93 5.99 6.11
MnO 0.17 0.17 0.15 0.15
MgO 12.70 7.25 1.78 2.11
CaO 10.00 9.00 4.80 4.71
Na 2 O 3.20 3.70 5.50 5.01
K 2 O 1.45 2.20 4.50 4.11
P 2 O 5 0.37
PF 0.06
Total 100.04 100.37 99.73 100.00
Trace elements ppm
Rb 39.0 33.5 60.6 62.4 71.2 56.8 62.2 61.4 55.2 134.5 141.4 132.5 132.8
Cs 0.86 0.66 1.47 1.38 1.58 0.76 0.92 1.05 0.88 0.96 2.34 2.83 2.12
Sr 685 722 627 610 640 701 422 623 649 537 731 788 729
Ba 480 466 530 545 593 559 579 589 549 881 909 901 1006
Y 21.8 21.4 23.6 22.2 23.9 23.8 24.3 24.4 22.9 21.0 24.3 27.4 25.6
La 43.0 42.0 46.3 47.5 52.3 45.8 50.3 51.1 48.3 65.6 74.5 74.3 79.6
Ce 85.6 82.3 91.9 92.7 102.0 88.6 97.9 99.9 94.6 115.0 134.7 134.3 141.5
Pr 10.1 9.6 10.8 10.7 11.7 10.0 11.2 11.5 10.9 12.1 14.0 14.5 14.7
Nd 39.2 37.1 41.3 40.4 43.8 37.8 42.2 43.0 41.3 41.8 47.8 50.1 50.0
Sm 7.70 6.84 7.91 7.72 8.32 6.92 7.93 8.16 7.89 7.09 7.95 8.45 8.19
Eu 2.47 2.36 2.50 2.44 2.60 2.36 2.54 2.55 2.48 2.39 2.44 2.77 2.81
Gd 7.56 7.79 7.85 7.58 8.13 8.11 7.96 8.06 7.83 7.05 7.85 10.13 10.10
Tb 0.98 0.95 1.02 0.99 1.05 1.00 1.04 1.05 1.02 0.87 0.96 1.14 1.12
Dy 5.01 4.54 5.39 5.16 5.51 4.88 5.41 5.42 5.29 4.59 5.03 5.39 5.08
Ho 0.92 0.83 1.01 0.97 1.03 0.91 1.01 1.02 1.01 0.89 0.97 1.04 1.00
Er 2.34 2.22 2.63 2.55 2.72 2.51 2.62 2.66 2.58 2.45 2.68 3.03 2.96
Tm 0.30 0.28 0.36 0.35 0.36 0.33 0.36 0.37 0.35 0.35 0.38 0.41 0.39
Yb 1.80 1.64 2.15 2.12 2.22 1.94 2.17 2.21 2.16 2.29 2.44 2.65 2.52
Lu 0.26 0.24 0.31 0.30 0.32 0.28 0.31 0.31 0.30 0.34 0.36 0.38 0.37
Zr 235 219 270 278 298 280 300 304 281 448 497 474 507
Hf 5.18 4.61 6.06 6.18 6.44 5.55 6.39 6.47 6.18 8.63 9.48 8.84 9.41
Nb 59.9 54.3 61.9 63.3 68.8 61.0 69.3 69.2 64.6 106.4 110.2 100.8 110.3
Ta 3.41 3.02 3.70 3.79 4.08 3.34 3.92 3.97 3.79 5.17 5.96 5.39 5.77
Pb 2.28 3.67 4.43 4 5 3 4 4 4 8 10 9 9
Th 4.74 4.73 6.87 7.13 7.74 6.94 7.29 7.35 6.92 15.98 17.12 17.51 18.04
U 1.30 1.26 1.96 2.04 2.26 1.75 1.96 2.10 1.87 4.60 4.71 4.71 4.89
Sc 27 26 23 19 18 18 22 21 21 10 10 13 12
V 280 275 223 189 202 230 232 226 216 103 103 110 96
Cr 345 377 146 108 83 148 180 145 181 10 11 16 14
Co 56.4 57.1 33.5 30.4 32.0 35.8 37.9 35.3 35.3 10.9 11.8 11.5 10.5
Ni 237 221 57 51 46 73 78 64 75 6 8 9 7
Cu 51 67 38 42 40 54 52 45 44 14 12 36 47
Zn 83 89 90 70 78 85 80 79 73 69 70 67 65

• indicates that xenoliths fragments have been removed by hand
  Trace elements in ppm. BHVO-2 is used as the reference for ICP- MS measurements. Reproducibility (in %) is calculated on 25 repeated measurements

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