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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

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