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Geochronology, Geology, Geochemistry and Petrology
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ASI - PH MNO / P 90-20
Sample
Rock type
Dacite
Sampled at
Sampled by
Bibliography
Magmatic response to abrupt changes in geodynamic settings : Pli
Country
Philippines
Region
Mindanao / Zamboanga Peninsula
Zone
Pagadian City
Longitude
123.1 DD 123° 5' 1''
Latitude
7.7 DD 7° 42' 0''
Altitude
0 m
Body of water
Océan Pacifique
Comments
Whole rock K-Ar dating
Analysis 1
Reference
B2983-5
Method
K-Ar
Technique
Age
0.82 Ma
Age incertitude
0.2 Ma
Precision
Sigma
±1
K2O
1.35 %
Fused mass
0.8004 g
40ArR/40ArT
4.63 %
40ArR
6.19 10-7cm3.g-1
36Ar
1.6 exp 10-9cm3
Comments
Analysis 2
Reference
B3026-6
Method
K-Ar
Technique
Age
0.82 Ma
Age incertitude
0.2 Ma
Precision
0
Sigma
±0
K2O
1.35 %
Fused mass
0 g
40ArR/40ArT
9.18 %
40ArR
1.63 10-7cm3.g-1
36Ar
9.76 exp 10-9cm3
Comments
Mineral K-Ar dating
Mineral 1 -
Analysis 1
Reference
B2987-9
Method
K-Ar
Technique
Age
1.39 Ma
Age incertitude
0.74 Ma
Precision
0
Sigma
±0
K2O
0.33 %
Fused mass
0.5996 g
40ArR/40ArT
2.91 %
40ArR
5.08 10-7cm3.g-1
36Ar
1 exp 10-9cm3
Comments
Mineral 2 -
Analysis 1
Reference
B3028-8
Method
K-Ar
Technique
Age
2.55 Ma
Age incertitude
1.19 Ma
Precision
0
Sigma
±0
K2O
0.33 %
Fused mass
0 g
40ArR/40ArT
5.01 %
40ArR
1.63 10-7cm3.g-1
36Ar
0.89 exp 10-9cm3
Comments
Major elements analysis
Analysis 1
Precision
0
SiO2
64.5
TiO2
0.38
Al2O3
17.95
Fe2O3
4.1
MnO
0.09
MgO
1.57
CaO
5.18
Na2O
4.13
K2O
1.24
P2OR
0.14
Total
100.19
Loss on ignition
0.91
Comments
Trace elements analysis
Analysis 1
Precision
Rb
26
Ba
240
Th
Nb
2
La
6.45
Ce
15
Sr
464
Nd
8.5
Sm
Zr
58
Eu
0.5
Gd
Dy
1.5
Y
10
Er
1
Yb
0.85
Sc
9.4
V
67
Cr
41
Co
12
Ni
21
Cu
Comments
Sr/Y=46
La/Yb=7.6
BaNb=120
Ba/La=37
Microprobe analyses
No data available
Isotopic analysis
No data available
Map
Documents
No data available
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