Activate the logging of intermediate values in the console.
Check this box if you want the calculated norm to be normalized to 100%.
Enter desired ratio of Fe₂O₃ to FeO. The default value is "0" (see info):
Fe3+/(Total Iron) |
Normally you calculate a norm using the analyzed Fe₂O₃ and FeO proportions. To do this just put a zero in the space to the right. Sometimes, if a rock has been chemically altered, metamorphosed, or if you don't have data for both Fe₂O₃ and FeO, you may want to use a standard ratio of these two components to calculate the norm. To choose a standard ratio, replace the zero in this space with a number from 0 to 1, corresponding to the desired molar ratio of Fe3+/(Total Iron). Common ratios used for rocks of the following compositions are: 0.1 for basalts and basaltic andesites, 0.15 for andesites, 0.2 for dacites, and 0.3 for rhyolites.
Total Fe as FeO |
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Desired Fe₂O₃ |
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Desired FeO |
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Weight corr. factor |
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This box checks certain parts of the calculations to be sure they are consistent with a correct norm. The green OK message indicates that there is nothing grossly incorrect detected in this calculated norm. This does not necessarily mean that the norm is correct, and you should always check for data entry errors and the reasonableness of the norm itself.
The red warning message indicates that there is a problem with the norm. This may mean that your rock composition was typed in wrong, that the rock composition lies outside the composition space in which the norm is designed to work, or it may indicate a bug in the calculation program. First, check for data entry errors and control the composition of your rock. If this is not the problem, please contact Minetosh online.
For more information and explanations go the help page, please:
SiO₂ |
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TiO₂ |
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Al₂O₃ |
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Fe₂O₃ |
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FeO |
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MnO |
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MgO |
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CaO |
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Na₂O |
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K₂O |
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P₂O₅ |
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CO₂ |
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SO₃ |
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S |
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F |
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Cl |
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Sr |
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Ba |
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Ni |
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Cr |
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Zr |
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Total* |
* This total includes the trace elements. The trace element values listed above have also been recalculated from ppm to the weight % of their respective oxides.
This function allows the classification of your rock using the Streckeisen-Diagram (QAPF-Diagram). Please indicate first whether your rock is volcanic or plutonic.
My sample is a ...
Q: |
The quartz content in wt% of the norm. |
A: |
The orthoclase content in wt% of the norm. |
P: |
The plagioclase (albite and anorthite) content in wt% of the norm. |
F: |
The content of nepheline and leucite in wt% of the norm. |
Index |
Volcanic rocks |
Plutonic rocks |
---|---|---|
1 |
Quartz Alkali-Feldspar Rhyolite |
Quartzolite |
2 |
Rhyolite |
Quartz-Rich Granitoid |
3 |
Dacite |
Alkali-Feldspar Granite |
3a |
Plagidacite (Quartz-Andesite) |
— |
4 |
Quartz-Bearing Alkali-Feldspar Trachyte |
Syeno-Granite |
5 |
Quartz-Trachyte |
Monzo-Granite |
6 |
Quartz-Latite |
Granodiorite |
7 |
Basalt, Andesite |
Tonalite |
7a |
Quartz-Bearing Latite-Andesite, Quartz-Bearing Latite-Basalt |
— |
7b |
Andesite, Quartz-Basalt |
— |
7c |
Latite-Andesit, Latite-Basalt |
— |
7d |
Andesite, Basalt |
— |
7e |
Foid-Bearing Latite-Andesit, Foid-Bearing Latite-Basalt |
— |
7f |
Foid-Bearing Andesite, Foid-Bearing Basalt |
— |
8 |
Alkali-Feldspar Trachyte |
Quartz-Bearing Alkali-Feldspar Syenite |
9 |
Trachyte |
Quartz-Syenite |
10 |
Latite |
Quartz-Monzonite |
11 |
Foid-Bearing Alkali-Feldspar Trachyte |
Quartz-Monzodiorite, Quartz-Monzogabbro |
12 |
Foid-Bearing Trachyte |
Quartz-Diorite, Quartz-Gabbro, Quartz-Anorthosite |
13 |
Foid-Bearing Latite |
Alkali-Feldspar Syenite |
14 |
Phonolite |
Syenite |
15 |
Tephritic Phonolite |
Monzonite |
16 |
Phonolitic Basanite (Olivine > 10%), phonolitic Tephrite (ol < 10%) |
Monzodiorite, Monzogabbro |
17 |
Basanite (Olivine > 10%), Tephrite (ol < 10%) |
Diorite, Gabbro, Anorthosite |
18 |
Phonolitic Foidite |
Foid-Bearing Alkali-Feldspar Syenite |
19 |
Tephritic Foidite |
Foid-Bearing Syenite |
20 |
Foidite |
Foid-Bearing Monzonite |
21 |
— |
Foid-Bearing Monzodiorite, Foid-Bearing Monzogabbro |
22 |
— |
Foid-Bearing Diorite / Gabbro / Anorthosite |
23 |
— |
Foid Syenite |
24 |
— |
Foid Monzosyenite |
25 |
— |
Foid Monzodiorite, Foid Monzogabbro |
26 |
— |
Foid Diorite, Foid Gabbro |
27 |
— |
Foidolite |
This function allows the classification of your rock using the TAS-Diagram (Total Alkali vs. Silica).
Usually, this diagram is only used for volcanic rocks. Accordingly, only the names of the corresponding volcanic rocks are given here.
Index |
Volcanic rocks |
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Pc |
Picrobasalt |
B |
Basalt |
O1 |
Basaltic andesite |
O2 |
Andesite |
O3 |
Dacite |
R |
Rhyolite |
S1 |
Trachybasalt |
S2 |
Basaltic trachyandesite |
S3 |
Trachyandesite |
T |
Trachyte or Trachydacite |
U1 |
Basanite or Tephrite |
U2 |
Phonotephrite |
U3 |
Tephriphonolite |
Ph |
Phonolite |
F |
Foidite |
Current date:
Enter a title for the currrent data-set
Identification: Sample number, etc.
The Streckeisen- and TAS-classifications can be downloaded using the Buttons below the diagrams.