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Geochronology, Geology, Geochemistry and Petrology
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ASI - PH MNO / Q 90-21
Sample
Rock type
Dacite
Sampled at
Sampled by
Bibliography
Magmatic response to abrupt changes in geodynamic settings : Pli
Country
Philippines
Region
Mindanao / Pacific Cordillera
Zone
North Davao
Longitude
126.2 DD 126° 12' 0''
Latitude
7.4 DD 7° 24' 0''
Altitude
0 m
Body of water
Océan Pacifique
Comments
Whole rock K-Ar dating
Analysis 1
Reference
B3001-7
Method
K-Ar
Technique
Age
0.31 Ma
Age incertitude
40 Ka
Precision
Sigma
±1
K2O
2.3 %
Fused mass
0.8 g
40ArR/40ArT
6.69 %
40ArR
1.63 10-7cm3.g-1
36Ar
0.87 exp 10-9cm3
Comments
Mineral K-Ar dating
Mineral 1 - Feldspath
Analysis 1
Reference
B3002-8
Method
K-Ar
Technique
Age
0.59 Ma
Age incertitude
90 Ka
Precision
Sigma
±1
K2O
1.3 %
Fused mass
g
40ArR/40ArT
5.29 %
40ArR
1.63 10-7cm3.g-1
36Ar
1.19 exp 10-9cm3
Comments
Major elements analysis
Analysis 1
Precision
SiO2
64.8
TiO2
0.31
Al2O3
16.75
Fe2O3
3.19
MnO
0.07
MgO
1.81
CaO
2.57
Na2O
7.36
K2O
2.44
P2OR
0.16
Total
99.63
Loss on ignition
0.17
Comments
Trace elements analysis
Analysis 1
Precision
Rb
37
Ba
429
Th
Nb
4.05
La
6.35
Ce
13
Sr
923
Nd
8
Sm
Zr
85
Eu
0.5
Gd
Dy
1.1
Y
7.5
Er
0.6
Yb
0.8
Sc
9
V
92
Cr
18
Co
8.5
Ni
10.5
Cu
Comments
Sr/Y=123
La/Yb=7.9
Ba/Nb=106
Ba/La=68
Microprobe analyses
No data available
Isotopic analysis
No data available
Map
Documents
No data available
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