Norma by Dr. Caco (2012). Implementation of the calculation of the CIPW norm designed by Cross, Iddings, Pirsson and Washington. Data should be uploaded from a txt file with the following fields separated by tabs.  A commenting row (e.g. with labels) is allowed providing that it begins with the '%' character (e.g: %SiO2 TiO2 Al2O3 Fe2O3 FeO MnO MgO CaO Na2O K2O P2O5 CO2 SO3 S F Cl Sr Ba Ni Cr Zr). Major elements, including S,F and Cl should be in weight %.  Trace elements (only Sr,Ba,Ni,Cr,Zr) should be uploaded as ppm.  If the analysis doesn't have an element, fill the cell with a zero and the norm will be calculated omiting such element. If the speciation of iron is not known, fill the ferric iron column with zeros and the ferrous iron column with total iron calculated as follows: FeO= 0.8998*Fe2O3. The speciation of the iron will be then estimated according to an intrinsic buffer, following Cortes et al., (2006) methodology. Available options are QFM, NNO and HM. The norm can be also calculated normalized if desired (although not recommended). To upload the data into the input field of the tool simply right click on the data window (Command-click in a Mac), which will display the uploading menu. When your data is uploaded, click on "Simulate" and the result will be displayed in the output window. Results can be downloaded clicking on the download button located in the upper-right corner of the window. Enjoy!

Researchers should cite this work as follows:

• Joaquin Alberto Cortes (2022), "Norma," https://theghub.org/resources/norma.

  BibTex | EndNote

1. geochemistry
2. petrogenesis
3. petrology