Subduction Factory 3: An Excel worksheet and macro for calculating the densities, seismic wave speeds, and H2O contents of minerals and rocks at pressure and temperature

Publication Type  Journal Article
Year of Publication  2004
Authors  Hacker, B. R.; Abers, G. A.
Journal Title  Geochemistry Geophysics Geosystems
Volume  5
Pages  -
Journal Date  Jan 20
ISBN Number  1525-2027
Accession Number  ISI:000188670600001
Key Words  equation of state; density; p wave; poisson's ration; s wave; mineral physics : equations of state; ineralogy and petrology : metamorphic petrology; tectonophysics : earth's interior-composition and state; equation-of-state; elastic properties; crystal-st

An Excel macro to calculate mineral and rock physical properties at elevated pressure and temperature is presented. The workbook includes an expandable database of physical parameters for 52 rock-forming minerals stable at high pressures and temperatures. For these minerals the elastic moduli, densities, seismic velocities, and H2O contents are calculated at any specified P and T conditions, using basic thermodynamic relationships and third-order finite strain theory. The mineral modes of suites of rocks are also specifiable, so that their predicted aggregate properties can be calculated using standard solid mixing theories. A suite of sample rock modes taken from the literature provides a useful starting point. The results of these calculations can be applied to a wide variety of geophysical questions including estimating the alteration of the oceanic crust and mantle; predicting the seismic velocities of lower-crustal xenoliths; estimating the effects of changes in mineralogy, pressure and temperature on buoyancy; and assessing the H2O content and mineralogy of subducted lithosphere from seismic observations.


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URL  <Go to ISI>://000188670600001
DOI  Doi 10.1029/2003gc000614