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Geochronology, Geology, Geochemistry and Petrology
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AF-MA / AZ21
Sample
Rock type
Néphélinite
Sampled at
Sampled by
M. El Azzouzi R. Maury A. Piqué
Bibliography
Country
Maroc
Region
Moyen Atlas
Zone
Azrou
Longitude
5.116667 DD 5° 7' 0''
Latitude
33.35 DD 33° 21' 0''
Altitude
1910 m
Body of water
Comments
Whole rock K-Ar dating
Analysis 1
Reference
B4057
Method
K-Ar
Technique
conventionnelle
Age
0.72 Ma
Age incertitude
30 Ka
Precision
2
Sigma
±1
K2O
1.62 %
Fused mass
1.0087 g
40ArR/40ArT
18.9 %
40ArR
0.37 10-7cm3.g-1
36Ar
0.89 exp 10-9cm3
Comments
Une 2ème analyse suit donnant un résultat de 0.78 ± 0.05 Ma. L'âge moyen est donc de 0.75 ± 0.05 Ma pour un sigma
Mineral K-Ar dating
No data available
Major elements analysis
Analysis 1
Precision
2
SiO2
40
TiO2
3.08
Al2O3
11.9
Fe2O3
13.4
MnO
0.21
MgO
11.45
CaO
12.6
Na2O
3.85
K2O
1.62
P2OR
1.25
Total
99.58
Loss on ignition
0.22
Comments
Trace elements analysis
No data available
Microprobe analyses
No data available
Isotopic analysis
No data available
Map
Documents
No data available
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