COOL - A FORTRAN-77 COMPUTER-PROGRAM FOR MODELING STABLE ISOTOPES IN COOLING CLOSED SYSTEMS

COOL is a FORTRAN-77 program for modeling stable isotope ratios of minerals in cooling closed systems. The closure temperatures of the minerals in a rock are used to define the temperature at which each mineral ceases stable isotope exchange with the other minerals in the rock. The mass balance relationship between the minerals is used together with the closure temperatures to calculate the delta values of the individual minerals as the rock cools. As well as calculating the mineral delta values in a cooling rock, COOL also can calculate apparent isotope equilibrium temperatures and estimate the rate at which a rock has cooled from experimental data. COOL can be used to model mineral delta values through a limited range of temperatures, so that the input data can be obtained from, or the output data used in, programs which model stable isotope exchange in open systems under isothermal conditions.