Software and tools from Mark Ghiorso at OFM Research
The MELTS software program is a graphical user interface (GUI) for calculations
using the MELTS and pMELTS thermodynamic models. It is available as a downloadable
program for Mac and Linux machines and via web tools for all systems.
Rhyolite-MELTS has the same graphical user interface
to MELTS and pMELTS but includes a modified version of the MELTS calibration, which gives
more realistic results for hydrous, silicic magmas. It behaves identically to MELTS when
quartz and alkali-feldspar are absent. Various improvements to the core algorithms
in rhyolite-MELTS increase the stability of all calculations, including pMELTS ones. So,
unless you are trying to recreate older calculations, we recommend you use the rhyolite-MELTS
version where possible.
Links to MELTS software for each system:
- For Linux systems, the latest rhyolite-MELTS version is linked on the
Linux Download site. The software is packaged as
.zip files, which can usually be decompressed by double-clicking; right-click and choose 'Properties',
or similar, to check that the permissions are set to executable. Alternatively use the 'unzip' and 'chmod'
command line tools (see the Mac OS X rhyolite-MELTS page for
details). There are 32-bit and 64-bit files built on Ubuntu 14.04 and RHEL 6.7; in general you can use choose
the one that most closely matches your operating system. Two exceptions are:
- For older Ubuntu systems (pre-12.10), use the RedHat versions.
- For Fedora systems, use the Ubuntu versions.
- For MacOS X systems (Mountain Lion onwards), the latest rhyolite-MELTS version is
linked on the Mac OS X rhyolite-MELTS page.
As of version 10.8, Apple does not include X11.app in OS X.
- On Mountain Lion, when you start rhyolite-MELTS (or another X11-based program) for the first
time you will be directed to download a version of X11 that runs on OS X.
- On Mavericks and Yosemite you may not receive the prompt to download X11. If you get an error
message inclucing "dyld: Library not loaded: /opt/X11/lib/libXft.2.dylib" when you try to start
the rhyolite-MELTS GUI then you need to go to the
project to download X11. You may need to log out and in before trying rhyolite-MELTS again.
- There is no downloadable MELTS software for Windows like the MacOSX and Linux versions.
provides a graphical user interface to set up, run, retrieve, and display calculations made with MELTS
on Windows, albeit with more limited functionality; the new H2O-CO2 fluid model (rhyolite-MELTS
v1.1.0 and 1.2.0), the pMELTS model, and routines for fractionation and assimilation are not currently available.
Alternatively, try running the Linux version of rhyolite-MELTS in a virtual machine,
such as the VirtualBox Linux installation available on the alphaMELTS download page.
On newer machines, the VirtualBox / Linux rhyolite-MELTS combination will run fast enough and, unlike MELTS_Excel,
it does not require an internet connection. So, depending on the number of calculations needed, it may be worth
the extra set-up time (even if you don't intend to run alphaMELTS).