About us!

The people behind alphaMELTS and the rest of the MELTS family

α alphaMELTS is developed and maintained by Paula Antoshechkina and Paul Asimow at Caltech. The alphaMELTS front-end is a fork of the MELTS software hosted at OFM Research and benefits from regular source code updates from Mark Ghiorso. The alphaMELTS program includes a number of features not available in the graphical user interfaces (GUI), including the pHMELTS algorithm. The flowchart below is a summary of the whos, wheres and whats.

The pHMELTS model (A2004) is based on the MELTS (GS1995) and pMELTS (G2002) algorithms. Rhyolite-MELTS (G2011) is also based on the MELTS liquid model. xMELTS (G2007) is the next generation MELTS model, which greatly expands the covered range of P-T conditions. The original NSF award lead to the development of the LEPR database (now LEPR / traceDs) and a provisional silicate liquid model.

Flowchart lists the MELTS-based tools and models maintained and developed at OFM Research and / or Caltech

An ARRA-funded collaboration between the three of us, together with then PhD candidate Emily Hamecher (now at Cal State, Fullerton), sought to extend and improve the thermodynamic solution models used with xMELTS (specifically garnet and pyroxenes, but also spinel). This work is ongoing and updated solid solution models are being made available at the Supplemental calculator link, as and when they are accepted for publication. For more information on the intended scope of the xMELTS model, once it is finalized, see the 5th FAQ on Mark's MELTS homepage.


Photo of Paula AntoshechkinaPaula Antoshechkina (née Smith) is an Associate Research Scientist at Caltech. She is responsible for most of the alphaMELTS front-end, forum and website. At the moment she is focused on the the development described in the Version 2 tab above, and adding CO2 to the pMELTS model. She is also working with the ENKI and Magma Chamger Simulator groups (see the Links tab); her other research interests are described elsewhere on the MAGMA website.

Photo of Paul AsimowPaul Asimow is Professor of Geology and Geochemistry at Caltech. He developed pHMELTS and many of the tools since incorporated into alphaMELTS. He is PhD advisor to Caltech grad students working on the pMELTS+CO2 model, and amphibole calibration. He is also involved in shock-wave experiments and theoretical calculations on silicate liquid and minerals.

Photo of Mark GhiorsoMark Ghiorso is the Vice-President of and Senior Research Associate at OFM Research. As well as ENKI and xMELTS-related development, his current areas of work include modeling H2O-CO2 fluids, thermodynamics of hydrous silicic systems and visualization of equilibrium phase relations.


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