GEOROC Sample Information
Location
Latitude -0.5133 | Longitude -91.13
GALAPAGOS ISLANDS / ISABELA (ALBEMARLE) / ALCEDO
OCEAN ISLAND
Reference
MACDONALD R.,SMITH R. L.,THOMAS J. E. JR.
CHEMISTRY OF THE SUBALKALIC SILICIC OBSIDIANS
U. S. GEOL. SURV. PROF. PAP. 1523 [1992] 1-214
Sample Name: 193
Sample Information
OBSIDIAN / PHENOCRYSTIC TEXTURE / OBSIDIAN, POST(?)-CALDERA LAVA FLOW
OUTCROP
Sample Age Information
No sample age information given.
Chemistry (and, if given, analytical ages)
Analyzed: VOLCANIC GLASS
AL2O3 | 13.36 WT% |
CAO | 1.23 WT% |
CL | 0.12 WT% |
CL | 0.1 WT% |
F | 0.1 WT% |
F | 0.09 WT% |
FE2O3 | 1.1 WT% |
FEO | 2.83 WT% |
H2OP | 0.14 WT% |
K2O | 3.01 WT% |
MGO | 0.24 WT% |
MNO | 0.14 WT% |
NA2O | 5.93 WT% |
P2O5 | 0.03 WT% |
SIO2 | 71 WT% |
TIO2 | 0.37 WT% |
CE | 136 PPM |
EU | 2.81 PPM |
GD | 16.7 PPM |
LA | 66 PPM |
LU | 1.35 PPM |
ND | 73 PPM |
SM | 17.5 PPM |
TB | 2.76 PPM |
TM | 1.5 PPM |
YB | 10 PPM |
BA | 435 PPM |
BE | 5.2 PPM |
CO | 1.5 PPM |
CR | 0.6 PPM |
CS | 1 PPM |
HF | 21.3 PPM |
LI | 28 PPM |
MO | 6 PPM |
NB | 83 PPM |
NB | 79 PPM |
PB | 10 PPM |
RB | 71 PPM |
RB | 50 PPM |
SB | 0 PPM |
SC | 4.7 PPM |
SN | 8.4 PPM |
SR | 90 PPM |
TA | 5.64 PPM |
TH | 10.4 PPM |
U | 2.8 PPM |
W | 2.1 PPM |
Y | 108 PPM |
ZN | 142 PPM |
ZR | 840 PPM |