This applet replaces the original MELTS applets. It uses a better client/server communication protocol and has an enhanced graphical user interface.

The applet should appear momentarily in its own popup window.

Please be patient. Loading the applet and constructing the GUI may take a while. If you close the applet window and want to run the applet again, just reload this page in your browser.

This applet accesses the MELTS CORBA server at OFM Research Inc. It allows the user to perform simulations of crystallization and assimilation in magmatic systems under various evolution scenarios, such as adiabatic decompression melting, fractional crystallization, etc. This applet is an alpha release that lacks certain critical functionality. At present only the Ghiorso and Sack (1995) model is implemented.

The applet interface is designed to emulate the standalone version of MELTS for Linux and MELTS for Mac OS X systems. Documentation on coding the client is located on the documentation page. You can download software for this client from the software download page.

Calculations derived from MELTS should be cited as:

Ghiorso, Mark S., and Sack, Richard O. (1995) Chemical Mass Transfer in Magmatic Processes. IV. A Revised and Internally Consistent Thermodynamic Model for the Interpolation and Extrapolation of Liquid-Solid Equilibria in Magmatic Systems at Elevated Temperatures and Pressures. Contributions to Mineralogy and Petrology, 119, 197-212

Asimow PD, Ghiorso MS (1998) Algorithmic Modifications Extending MELTS to Calculate Subsolidus Phase Relations. American Mineralogist 83, 1127-1131

Calculations derived from pMELTS should be cited as:

Ghiorso, Mark S., Hirschmann, Marc M., Reiners, Peter W., and Kress, Victor C. III (2002) The pMELTS: An revision of MELTS aimed at improving calculation of phase relations and major element partitioning involved in partial melting of the mantle at pressures up to 3 GPa. Geochemistry, Geophysics, Geosystems 3(5), 10.1029/2001GC000217

The MELTS applet is written in Java 1.4.2 and utilizes the Swing widget set for its graphical user interface. For the applet to function in a web browser, the browser must have a Java run-time environment (JRE) installed that supports these features.

This applet is known to work on Mac OS X operating systems (vr. 10.4, Tiger) with the Safari (vr. 2.0.3) browser and with the Mozilla FireFox browser (vr. 1.5). It will not function with the Internet Explorer (IE) browser (vr. 1.5.2) or with the Netscape browser (vr. 7.2) under Mac OS X. If you are using Internet Explorer, note that Microsoft recommends switching to Safari as they no longer support IE on the Macintosh platform.

Under Windows and Linux, you will have to update the JRE for Internet Explorer and perhaps for Netscape and Mozilla. There is an excellent web page that provides instructions on how to do this and also a means of testing which version of the JRE is installed in your browser at