36Cl Exposure Age Calculator
Please enter the samples using the form below. You can double click the box to edit the dropdown boxes. You can also download the template at the bottom of the page and copy the boxes from the template directly into the calculator. When finished entering
the data, please click the calculate button and be patient while the calculations are run. You will receive an email with a link to see the status of your sample run unless the server encounters an error. A new window will pop up with the results
from your request or any errors that occur.
Note when pasting: When pasting data from Excel, single-click the cell where you would like to paste the data (the cell will be highlighted). If you double-click a cell (which brings up a text box), the program will assume you want all pasted
data to go into that single cell. Pasting has been verified in the latest versions of Chrome, Firefox, and Edge.
Official Update to Version 2.1 (13 Aug 2020):
- This version includes two small fixes to typos involving Cr-Li and the normalisation of major elements
to account for pore water. The production rates have been completely recalibrated to account for the changes and will be available soon in an errata. The largest
difference is for Pf(0), which is approximately 6% lower than in the previous version (within original uncertainties). Spallation production rates are essentially unaffected.
For most samples, this fix will make no practical difference. However, for samples with high concentrations of Cl and/or high Cr or Li, there may be differences in age. For
many samples in this category, the difference was < 0.5% and always within existing uncertainties, but we recommend rerunning samples if they meet these criteria.
Coming soon: This shouldn't result in significant differences in results, but the calculator code is being updated to handle 36Cl production rates from iron (Fe)
differently in order to incorporate the new Fe production rates from Moore and Granger (2019).
- Arrow keys/home/end/PgUp/PgDn keys can be used for navigation.
- Tab key will select uncertainity cell of the associated cell and vice-versa, if any.
- To edit a cell, start typing when the cell is selected, double click on it, or press enter when it is selected. To finish editing, either click outside the cell or press enter again.
- Cells with dark background are disabled cells and their contents can not be modified until they are enabled.
- Clicking a column header will display a help popup.
Some columns are "Option Columns". Cells in these columns can have limited number of values.
- To paste tab&newline-delimited data into the sheet (from the template Excel sheet for ex.), select the cell and use ctrl+v key combination.
"Insert Row" button will show a little dialog for inserting new rows to the sheet wrt the currently selected cell. Once the dialog is open, you can use arrow keys to adjust setting and enter to commit changes.
"Remove Row" button will remove the selected cell's row.
"Clear Row" button will clear all the data in the selected cell's row.
"Clear Sheet" button will remove all data in sheet.
If "Sample Name" column is empty, that row will be ignored upon submission.
- If error(s) found during submission or data pasting, the status bar on the lower right corner will warn you. You can click that message to see the errors. In the error list, if an error is associated with a cell, clicking on that error line will select
the associated cell.
MATLAB source code for all 7 scaling schemes is available in the
CRONUS Earth Bitbucket Repository
Source and documentation for other parts of the system will be available in the near future.
CRONUS Earth is funded by the National Science Foundation. All rights reserved. | Webmaster