Instructions:
- To enter the input data directly in the app, click on the Input Data tab above.
Note that this is a one-time data entry where input will be lost when the app is closed.
Alternatively, select the Download Table button under the Input Data tab and enter
and save input data in an Excel (csv format) table. Do NOT change the formatting of this table,
save it as a .csv file, and re-upload it. To re-upload, select Upload File button under the
Input Data tab, which allows you to select and upload the .csv input file. Mineral mode inputs
are in volume % and
grain dimensions in centimeters. Distribution types: h = hypergeometric;
b = binomial; p = Poisson. Mineral compositions (from EPMA data) are in
weight % oxide.
- In the Input Data tab window, enter the sample name, which will be saved to
output tables and plots.
- Select the Type of Calculation (left side panel): Range of Sample Sizes models
the rock over a range of sample sizes (masses) from 625 to 20,000 grams; Defined Sample
Size allows you to input the particular sample size (mass) that you want modeled.
- It is recommended that you download the final input table for your records before running
the program. This can be done with the Download Table button under the Input Data tab.
- Press Run Modeling (left panel) and wait for program to finish. Note that it may take ~ 60 seconds
for the program to complete its calculations.
- View and download output table and plots using the output tabs above. Results Table gives the
average major-,
minor- and selected trace-element composition derived from the
10,000 simulations of the input rock modal composition. The table
also reports, for a given sample mass and mineral grain sizes,
the predicted sampling error standard deviation and relative
standard deviation (RSD) for each oxide or element.
Download ReadME file