Details

Imprimer

Name

Iron Formation

Reference

IF-G

Working group

International Working Group - Groupe International de Travail (IWG-GIT)

Weight

Sachet of 30g

Availability

Available

Price

20.00

Source

From a large iron-ore deposit in the 3.8 b.y. old Isua supracrustal belt, West Geenland.

Major elements

Element

Number of results

Standard deviation

Working value (%)

95% confidence limits

SiO2810.6741.20.15
Al2O3760.0860.150.02
Fe2O3471.0137.20.3
FeO460.6216.780.18
MnO840.0140.0420.003
MgO840.161.890.04
CaO830.151.550.03
Na2O630.0460.0320.01
K2O560.0310.0120.008
TiO2530.030.0140.008
P2O5590.0520.0630.014
H2O+210.210.410.09
H2O-270.040.060.02
CO2120.180.30.1
Fe2O3T790.9955.850.22
Loss on ignition-1.1proposed value

Trace elements

Element

Number of results

Standard deviation

Working value (µg/g)

95% confidence limits

As80.71.50.5
Ba17331.50.5
Be130.64.70.5
Ce160.840.4
Cl25proposed value
Co313295
Cr371241
Cs60.06proposed value
Cu243102
Dy130.050.80.1
Er100.040.630.1
Eu220.070.390.04
F115010
Ga70.7proposed value
Gd110.040.740.2
Ge242
Hf30.04proposed value
Ho70.050.20.05
In0.02proposed value
La240.62.80.4
Li71proposed value
Lu160.020.090.01
Mo80.70.2
Nb130.10.05
Nd150.221.80.2
Ni311622.53
Pb1542
Pr50.080.40.05
Rb230.4proposed value
S18700proposed value
Sb100.30.630.2
Sc140.50.30.1
Sm190.060.40.1
Sn0.30.1
Sr3531
Ta80.020.20.03
Tb90.050.110.02
Th90.1proposed value
Tl0.02proposed value
Tm40.050.090.02
U60.02proposed value
V2021
W106022015
Y27390.5
Yb220.30.60.1
Zn367204
Zr1810.2

References

Date

Title

Reference

Authors

1984Geostandards Newsletter8:63-112K. Govindaraju
1995Geostandards Newsletter19:55-95K. Govindaraju
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