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ASI - IND / SBU 2.1

Sample

Rock type
Trachyandésite
Sampled at
1994-01-01
Sampled by
Christian HONTHAAS
Bibliography
Country
Indonésie
Region
Mer de Banda / Banda Sea
Zone
villa de Ramos
Longitude
123.8 DD     123° 47' 1''
Latitude
-4.7 DD     -5° 17' 1''
Altitude
-5000 m
Body of water
Comments

Whole rock K-Ar dating

Analysis 1

Reference
B3804-6
Method
K-Ar
Technique
isotope dilution on
Age
7.33 Ma
Age incertitude
0.18 Ma
Precision
0
Sigma
±1
K2O
1.98 %
Fused mass
g
40ArR/40ArT
53.6 %
40ArR
4.68 10-7cm3.g-1
36Ar
exp 10-9cm3
Comments

Mineral K-Ar dating

No data available

Major elements analysis

Analysis 1

Precision
0
SiO2
60.2
TiO2
1.68
Al2O3
14.3
Fe2O3
8.98
MnO
0.27
MgO
2.3
CaO
5.38
Na2O
4.42
K2O
2.06
P2OR
0.46
Total
Loss on ignition
0.33
Comments
composition normative : Q = 11.60 ; Hy = 10.42 ; D.I. = 60.92 ; (Mg) = 0.37

Trace elements analysis

Analysis 1

Precision
0
Rb
84
Ba
288
Th
12.01
Nb
16.2
La
35
Ce
81
Sr
142
Nd
46
Sm
9.3
Zr
284
Eu
2.5
Gd
0
Dy
12
Y
67
Er
6
Yb
5.8
Sc
19
V
137
Cr
25
Co
19
Ni
23
Cu
0
Comments
ppm: Cs = 2.02 ; Hf = 10.40 ; Ta = 1.35 ; U = 2.67 ; Tb = 1.70,

Microprobe analyses

No data available

Isotopic analysis

Analysis #1

87Sr/87Sr
0
143Nd/144Nd
0
206Pb/204Pb
0
207Pb/204Pb
0
208Pb/204Pb
0
Comments
autre: 40Ar = 53.6(%); 40Ar = 4.68(e-7 cc/g); 36Ar = 1.37(e-9 cc/g) Age : 7.33 +/- 0.18 Ma ,
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