ArArCALC  |  Help Contents  |  Full Text    

ArArCALC Help Library

First  |  Previous  |  Next  |  Last    

2.3.12  Calculate as Lunar Sample

Choosing the Options # Calculate as Lunar Sample menu item toggles between calculation of terrestrial and lunar ages. When calculating Lunar Ages the atmospheric component is replaced with a trapped component and an additional cosmogenic component is added into your calculations.

Note   Be certain to define cosmogenic correction factors in the irradiation settings (see also: Managing Irradiations and Projects). Also when ArArCALC is in the Lunar Age Calculation mode, the 40/36Ar(t) ratio is set to 1 by default. This is automatically undone when the user switches back to the Terrestrial Age Calculation mode. In that case, the 40/36Ar(a) value gets set to 295.5 again.