Geochemical Evidence for Mantle Origin and Crustal Processes in ...

JOURNAL OF PETROLOGY VOLUME 46 NUMBER 6 JUNE 2005
Table 1: continued
Suite: Popocatépetl
Sample: 9490m 95112lp 9450p 0101s 0102s 0103d 0104p 97D1 96D3-1 96D4-A1 96D4-Com 96D3-3 96D3-2 97D2
E Tlamacaz
Location: Paso de
Cortés
Rock type: Milky
pumice
Mineralogy: hb>2px>
pl>ol>ox
E Paso de
Cortés
Lorenzo
pumice
pl>2px>
2ox>po
E Paso
de Cortés
Pink
pumice
pl>2px>
ol>2ox>po
E Tlamacaz E Tlamacaz E Tlamacaz E Tlamacaz E Tlamacaz Near Bonsai
seism.
stat.
Scoria,
pyrocl. fl.
22.1.2001
pl>2px¼
ol>ox
Scoria,
pyrocl. fl.
22.1.2001
pl>2px¼
ol>ox
Dome
fragm., pyrocl.
fl. 22.1.2001
pl>ol>
2px>ox
Latitude N: 19 05 0 13 00 19 04 0 57 00 19 05 0 09 00 19 03 0 00 00 19 03 0 00 00 19 03 0 00 00 19 03 0 00 00 19 02 0 48 00 19 02 0 59 00 19 03 0 43 00 19 02 0 59 00 19 02 0 59 00 19 02 0 59 00 19 02 0 48 00
Longitude W: 98 38 0 37 00 98 35 0 48 00 98 38 0 41 00 98 37 0 15 00 98 37 0 15 00 98 37 0 15 00 98 37 0 15 00 98 38 0 01 00 98 33 0 36 00 98 34 0 10 00 98 33 0 36 00 98 33 0 36 00 98 33 0 36 00 98 38 0 01 00
Altitude (m): 3680 3690 3690 3825 3825 3825 3825 3800 3500 3100 3500 3500 3500 3800
Distance
from crater: 7 km N 8.7km NE 6.7km N 2.5km N 2.5km N 2.5km N 2.5km N 2.7kmN 8kmNE 7.4 km NE 8 km NE 8 km NE 8 km NE 2.7km N
Pumice in
pyrocl. fl.
22.1.2001
pl>ol>
2px>ox
Dome
fragm.,
30.6.1997
pl>2px>
ol
Dome
fragm.,
30.4.1996
pl>2px>
ol
NE Popocatéptl
flank
Dome
fragm.,
30.4.1996
pl>2px>
ol
Near Bonsai
seism.
stat.
Dome
fragm.,
30.4.1996
pl>2px>
ol
Near Bonsai
seism.
stat.
Dome
fragm.,
30.4.1996
pl>2px>
ol
Near Bonsai
seism.
stat.
Dome
fragm.,
30.4.1996
pl>2px>
ol
Dome
fragm.,
30.6.1997
pl>2px>
ol
wt % Detection
limits
SiO 2 60.52 61.04 61.74 53.75 59.33 61.42 62.67 58.20 60.81 62.12 63.23 62.63 62.82 62.92
TiO2 0.77 0.80 0.75 0.77 0.87 0.79 0.72 0.92 0.67 0.71 0.71 0.71 0.69 0.73
Al2O3 16.77 16.63 15.87 14.37 16.02 16.11 15.57 16.06 15.84 16.10 16.28 16.31 16.09 16.58
Fe 2 O 3 (tot) 5.64 5.57 5.15 5.66 6.25 5.51 5.08 6.58 5.8 5.39 5.11 5.65 5.36 5.05
MnO 0.09 0.09 0.08 0.09 0.10 0.09 0.09 0.10 0.09 0.09 0.08 0.09 0.09 0.10
MgO 3.75 4.13 3.44 5.26 5.53 4.29 3.67 6.97 3.48 3.81 3.39 3.78 3.03 3.55
CaO 5.72 4.96 4.80 5.79 6.47 5.69 5.00 6.24 5.04 5.08 4.96 5.18 4.79 5.05
Na 2 O 4.10 4.23 4.25 3.84 4.20 4.37 4.61 4.21 4.21 4.33 4.36 4.40 4.40 4.56
K2O 1.57 1.67 1.97 1.22 1.30 1.55 1.74 1.34 1.67 1.72 1.75 1.65 1.78 1.81
P2O5 0.21 0.21 0.21 0.16 0.20 0.18 0.17 0.22 0.17 0.17 0.17 0.17 0.17 0.17
LOI 0.49 1.03 0.40 8.87 0.12 0.01 0.96 0.18 0.01 0.04 0.08 0.29 0.77 0.06
Total 99.63 100.35 98.66 99.78 100.16 99.98 100.27 100.661 97.78 99.50 100.12 100.86 99.98 100.58
ppm
Sc 13 13 11 15 17 14 12 14 11 12 12 13 11 11
Be 1 2 1 1 1 2 2 n.d. 1 1