Redalyc.Volcanismo de sin-rift de la Cuenca Neuquina, Argentina ...
Redalyc.Volcanismo de sin-rift de la Cuenca Neuquina, Argentina ...
Redalyc.Volcanismo de sin-rift de la Cuenca Neuquina, Argentina ...
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D’Elia et al./ An<strong>de</strong>an Geology 39 (1): 106-132, 2012<br />
TABLA 1. ANÁLISIS QUÍMICOS DE ROCAS VOLCÁNICAS Y PIROCLÁSTICAS ALOJADAS EN LOS DEPOCENTROS DEL SECTOR AUSTRAL DE LA CUENCA<br />
NEUQUINA.<br />
Muestras NIR 8 NIR 10 NIR 23 NIR 28 PLT 26 PLT 27 PLT 32 PLT 33 PLS 22-1 PCL 22 ECM 21 ECM 47 NPS 12 LAPA LAC 2 PDA 2 PDA 1 PDA 3 SN 1 SN 6 SN 2 SN 4 SN 7 SN 5<br />
Ocurrencia domo <strong>la</strong>va <strong>la</strong>va <strong>la</strong>va <strong>la</strong>va <strong>la</strong>va <strong>la</strong>va ign domo <strong>la</strong>va domo <strong>la</strong>va <strong>la</strong>va <strong>la</strong>va <strong>la</strong>va ign ign <strong>la</strong>va <strong>la</strong>va domo <strong>la</strong>va <strong>la</strong>va <strong>la</strong>va ign<br />
C<strong>la</strong>sificación* riolita an<strong>de</strong>sita an<strong>de</strong>sita an<strong>de</strong>sita an<strong>de</strong>sita an<strong>de</strong>sita an<strong>de</strong>sita riodacita riodacita an<strong>de</strong>sita riodacita an<strong>de</strong>sita riodacita basalto basalto riolita riodacita dacita an<strong>de</strong>sita riodacita an<strong>de</strong>sita riodacita an<strong>de</strong>sita riodacita<br />
Elementos may. (% wt)<br />
SiO2 73,36 56,82 65,37 66,29 62,58 72,92 61,12 81,84 81,78 62,04 65,77 56,17 78,27 49,32 49,85 79,44 70,33 52,78 54,29 73,24 59,10 69,35 61,94 67,75<br />
Al2O3 12,53 15,52 13,95 14,26 14,79 11,00 16,49 9,58 10,16 16,58 14,24 17,88 11,05 15,11 15,23 10,49 13,86 16,81 17,47 12,61 17,43 14,20 15,56 14,12<br />
Fe2O3(T) 3,23 6,92 4,64 4,65 5,32 3,61 6,14 1,29 0,61 5,68 4,55 7,07 2,97 8,69 8,95 1,19 3,03 9,17 4,92 2,64 5,87 1,95 7,31 1,70<br />
MnO 0,06 0,10 0,08 0,13 0,09 0,04 0,07 0,02 0,00 0,11 0,14 0,56 0,04 0,19 0,16 0,02 0,02 0,15 0,12 0,03 0,18 0,04 0,08 0,05<br />
MgO 0,24 3,54 0,80 2,28 0,58 0,91 1,10 0,08 0,03 0,98 1,17 3,33 0,37 0,66 8,23 0,21 0,36 2,59 0,37 0,17 2,68 0,33 1,08 0,58<br />
CaO 1,16 8,26 3,05 1,14 2,52 0,88 1,85 0,16 0,07 3,36 1,08 1,09 0,68 8,15 9,69 0,48 0,62 4,82 8,30 0,54 5,12 2,56 5,46 1,43<br />
Na2O 4,34 3,47 6,92 5,43 3,22 2,63 3,26 2,39 1,99 4,23 2,69 5,78 5,24 6,38 2,63 1,34 3,13 4,08 4,02 2,58 3,86 2,73 3,29 1,14<br />
K2O 1,46 0,44 0,34 1,32 4,81 3,92 3,80 3,78 4,78 3,18 6,53 3,25 0,72 0,98 0,63 5,30 3,91 2,27 3,46 4,71 1,06 3,39 0,93 4,46<br />
TiO2 0,13 0,94 0,63 0,59 0,73 0,58 0,78 0,23 0,10 0,77 0,48 0,66 0,27 1,77 0,96 0,08 0,41 1,18 0,65 0,30 0,62 0,44 0,94 0,21<br />
P2O5 0,03 0,16 0,18 0,15 0,21 0,19 0,20 0,03 0,03 0,21 0,07 0,15 0,06 0,54 0,23 0,03 0,12 1,01 0,27 0,08 0,25 0,11 0,26 0,04<br />
LOI 2,17 3,34 2,62 2,44 3,52 2,27 3,76 0,69 0,59 1,94 2,12 2,55 1,08 6,61 2,47 2,39 2,97 4,40 5,65 1,40 3,04 3,76 2,49 7,07<br />
Total 98,70 99,51 98,57 98,66 98,37 98,94 98,57 100,10 100,10 99,07 98,84 98,50 100,70 98,40 99,03 101,00 98,77 99,25 99,51 98,30 99,19 98,84 99,35 98,55<br />
Elementos trazas (ppm)<br />
Sc 7,0 23,0 13,0 11,0 13,0 11,0 17,0 5,0 2,0 17,0 12,0 13,0 5,0 22,0 29,0 3,0 6,0 15,0 11,0 7,0 7,0 8,0 17,0 3,0<br />
Be 2,0 2,0 1,0 2,0 3,0 2,0 2,0 1,0 1,0 2,0 2,0 2,0 2,0 2,0 1,0 2,0 1,0 3,0 2,0 1,0 1,0 2,0 1,0 2,0<br />
V < 5 167,0 37,0 80,0 63,0 67,0 54,0 13,0 < 5 54,0 65,0 72,0 44,0 190,0 222,0 13,0 43,0 90,0 106,0 36,0 70,0 59,0 97,0 31,0<br />
Ba 222,0 95,0 71,0 279,0 558,0 493,0 693,0 864,0 1544,0 424,0 1674,0 639,0 397,0 394,0 159,0 686,0 979,0 955,0 979,0 683,0 277,0 908,0 400,0 1242,0<br />
Sr 81,0 77,0 94,0 154,0 101,0 120,0 254,0 129,0 123,0 359,0 91,0 243,0 401,0 370,0 715,0 47,0 92,0 553,0 553,0 83,0 530,0 154,0 427,0 583,0<br />
Y 37,0 19,0 25,0 19,0 25,0 19,0 28,0 15,0 20,0 29,0 27,0 19,0 19,0 28,0 15,0 24,0 24,0 32,0 9,0 14,0 19,0 17,0 23,0 11,0<br />
Zr 248,0 129,0 158,0 140,0 169,0 136,0 198,0 117,0 106,0 206,0 214,0 126,0 129,0 256,0 86,0 58,0 263,0 408,0 192,0 79,0 142,0 169,0 152,0 113,0<br />
Cr < 20 130,0 < 20 50,0 < 20 20,0 < 20 90,0 < 20 < 20 30,0 < 20 70,0 220,0 410,0 30,0 < 20 40,0 30,0 < 20 < 20 < 20 30,0 < 20<br />
Co < 1 28,0 7,0 17,0 8,0 5,0 11,0 2,0 < 1 13,0 12,0 21,0 5,0 22,0 47,0 1,0 6,0 28,0 10,0 4,0 9,0 4,0 15,0 213,0<br />
Ni < 20 40,0 < 20 < 20 < 20 < 20 < 20 < 20 < 20 < 20 < 20 < 20 < 20 60,0 160,0 < 20 50,0 < 20 < 20 < 20 < 20 < 20 < 20 300,0<br />
Cu 10,0 60,0 < 10 30,0 10,0 < 10 10,0 10,0 < 10 < 10 < 10 10,0 30,0 10,0 80,0 < 10 < 10 60,0 30,0 10,0 < 10 < 10 20,0 20,0<br />
Zn 110,0 60,0 70,0 220,0 80,0 60,0 80,0 50,0 < 30 140,0 100,0 230,0 110,0 100,0 120,0 < 30 60,0 150,0 110,0 40,0 70,0 80,0 70,0 50,0<br />
Ga 20,0 17,0 10,0 13,0 19,0 11,0 21,0 6,0 7,0 21,0 21,0 20,0 8,0 14,0 19,0 13,0 17,0 24,0 22,0 14,0 19,0 19,0 18,0 15,0<br />
Ge 2,0 3,0 3,0 1,0 2,0 2,0 2,0 2,0 2,0 3,0 2,0 2,0 2,0 5,0 3,0 2,0 2,0 2,0 3,0 3,0 2,0 3,0 2,0 2,0<br />
As 7,0 29,0 22,0 7,0 8,0 8,0 10,0 < 5 < 5 14,0 24,0 13,0 8,0 150,0 < 5 19,0 6,0 < 5 6,0 9,0 < 5 10,0 9,0 11,0<br />
Rb 91,0 12,0 18,0 45,0 163,0 179,0 156,0 79,0 145,0 164,0 314,0 160,0 34,0 35,0 16,0 186,0 165,0 48,0 90,0 97,0 24,0 164,0 20,0 122,0<br />
Nb 12,0 3,0 7,0 7,0 7,0 5,0 8,0 3,0 4,0 8,0 8,0 5,0 7,0 17,0 5,0 8,0 8,0 20,0 5,0 8,0 6,0 8,0 5,0 9,0<br />
Mo
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