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

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

Either clone the github repository with

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

or download thelatest 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 followsGoes et al. (2000) to convert vp orvs to temperature and density assuming a mineral assemblage
• V2T implements the method byPriestley and McKenzie(2006) and convertsVs to temperature
• T2Rho applies the equations ofGoes 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 ofV2RhoT, optimized for regularly gridded data, is availablehere.

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

Navigate to the base folder./VeloDT and execute

qmakemake

This will build theV2RhoT andV2T executables and put them in the./VeloDT folder.

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

• 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.