VeloDT

VeloDT contains two C++ implementations of Vp- and/or Vs-conversions to temperature and/or density valid in the upper mantle.

Vp and Vs converted from PREM (Dziewonski and Anderson, 1981) using the two different approaches.

Getting started

Either clone the github repository with

bash git clone https://github.com/cmeessen/VeloDT.git

or download the latest release as source code or binary and extract it somewhere. If you downloaded the source code, you will have to compile the code (see below).

• V2RhoT closely follows Goes et al. (2000) to convert vp or vs to temperature and density assuming a mineral assemblage
• V2T implements the method by Priestley and McKenzie (2006) and converts Vs to temperature
• T2Rho applies the equations of Goes et al. (2000) to compute densities from a given mineral composition, temperature and pressure

Please refer to the original publications for validity and pitfalls of the methods.

A Python implementation of V2RhoT, optimized for regularly gridded data, is available here.

Requirements

The requirements for compilation and running the code are

• Qt4 or later and qmake
• a C++ compiler, e.g. GCC

Requirements for plotting the example:

• GMT
• make

Compiling

Navigate to the base folder ./VeloDT and execute

bash qmake make

This will build the V2RhoT and V2T executables and put them in the ./VeloDT folder.

License

VeloDT is published under the terms of GNU General Public License v3.0.

Bibliography

• Cammarano, Fabio, Saskia Goes, Pierre Vacher, and Domenico Giardini. “Inferring Upper-Mantle Temperatures from Seismic Velocities.” Physics of the Earth and Planetary Interiors 138, no. 3–4 (August 2003): 197–222. https://doi.org/10.1016/S0031-9201(03)00156-0.

• Dziewonski, Adam M., and Don L. Anderson. “Preliminary Reference Earth Model.” Physics of the Earth and Planetary Interiors 25, no. 4 (June 1, 1981): 297–356. https://doi.org/10.1016/0031-9201(81)90046-7.

• Goes, S., R. Govers, and P. Vacher. “Shallow Mantle Temperatures under Europe from P and S Wave Tomography.” Journal of Geophysical Research: Solid Earth 105, no. B5 (2000): 11153–69. https://doi.org/10.1029/1999JB900300.

• Kennett, B. L. N., E. R. Engdahl, and R. Buland. “Constraints on Seismic Velocities in the Earth from Traveltimes.” Geophysical Journal International 122, no. 1 (July 1, 1995): 108–24. https://doi.org/10.1111/j.1365-246X.1995.tb03540.x.

• Priestley, Keith, and Dan McKenzie. “The Thermal Structure of the Lithosphere from Shear Wave Velocities.” Earth and Planetary Science Letters 244, no. 1–2 (April 15, 2006): 285–301. https://doi.org/10.1016/j.epsl.2006.01.008.

• Saxena, Surendra K., and Guoyin Shen. “Assessed Data on Heat Capacity, Thermal Expansion, and Compressibility for Some Oxides and Silicates.” Journal of Geophysical Research: Solid Earth 97, no. B13 (Dezember 1992): 19813–25. https://doi.org/10.1029/92JB01555.