Abstract
Evaluating the statistics of elemental mass transfer associated with metasomatism is a complex and time-intensive process. Hence, we developed a Matlab 5 program, herein referred to as SACD, that has proven to be fast, efficient, and thorough at statistically analyzing elemental and rock-mass changes. The essence of SACD is that it calculates all pertinent statistics that stem from the null hypothesis, H0, that there is no change in elemental mass brought on by metasomatism. The results output by SACD were checked against published data from the Wepawaug Schist, Connecticut that was metamorphosed under Barrovian conditions, probably during the Acadian orogeny. Elemental and total rock-mass changes computed by SACD are nearly identical to those in the published literature but show that, contrary to the published literature, acceptance of H0 carries with it an unacceptable risk. We urge anyone teaching the principles of elemental mass transfer to students to make use of this tool. It will free students from the tedium of number crunching and leave them more time to contemplate the physiochemical reasons for metasomatism, an Earth process that remains poorly understood and deserving of more of our time.
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