GEOROC Sample Information

Location
Latitude -0.5133 | Longitude -91.13
ALCEDO
CONVERGENT MARGIN

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

NOT GIVEN / 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

AL2O313.36 WT%
CAO1.23 WT%
CL0.12 WT%
CL0.1 WT%
F0.1 WT%
F0.09 WT%
FE2O31.1 WT%
FEO2.83 WT%
H2OP0.14 WT%
K2O3.01 WT%
MGO0.24 WT%
MNO0.14 WT%
NA2O5.93 WT%
P2O50.03 WT%
SIO271 WT%
TIO20.37 WT%
CE136 PPM
EU2.81 PPM
GD16.7 PPM
LA66 PPM
LU1.35 PPM
ND73 PPM
SM17.5 PPM
TB2.76 PPM
TM1.5 PPM
YB10 PPM
BA435 PPM
BE5.2 PPM
CO1.5 PPM
CR0.6 PPM
CS1 PPM
HF21.3 PPM
LI28 PPM
MO6 PPM
NB83 PPM
NB79 PPM
PB10 PPM
RB71 PPM
RB50 PPM
SB0 PPM
SC4.7 PPM
SN8.4 PPM
SR90 PPM
TA5.64 PPM
TH10.4 PPM
U2.8 PPM
W2.1 PPM
Y108 PPM
ZN142 PPM
ZR840 PPM