Links to MELTS software and other tools available from the OFM Research Inc. site have been relocated to the
alphaMELTS links page (see right).
Other thermodynamic models
Software for construction of standard phase diagrams and equilibrium phase diagrams (a.k.a. pseudosections)
etc.; there is more emphasis on metamorphic phases in the thermodynamic databases and solution models than in MELTS,
but they may still be useful for igneous systems:
Searchable databases of thermodynamic and geochemical data:
- The EarthChem website hosts a number of databases that are maintained by the IEDA Research Group. It includes the EarthChem Portal where users may simultaneously search multiple geochemical datasets including PetDB (ocean floor igneous and metamorphic rocks), GEOROC (volcanic rocks and mantle xenoliths), DeepLith (deep crustal and mantle xenoliths) and more.
- The GERM Reservoir Database contains summary data, such as elemental concentrations and isotopic ratios, for geochemical reservoirs in the Earth and across the Solar System.
- The GERM Partition Coefficient (Kd) Database contains experimental and empirical partition coefficient data and may be searched by rock type, mineral and element.
- The traceDs Portal accesses a trace element experimental database, created by Roger Neilson, Anthony Koppers and Mark Ghiorso. The interface is in rough (pre-alpha) form and the number of entries in the database is limited but the hope is that this prototype can be developed into a long term repository for trace element data, comparable to the LEPR database for major elements (see below). Results from over four hundred experiments on liquid-clinopyroxene partitioning (from 42 references) are available. Search options include nearest neighbour and bracket searches on bulk, liquid or cpx composition.
- The Library of Experimental Phase Relations (LEPR) comprises liquid and solid phase equilibria for natural and, to a lesser extent, synthetic igneous systems. A wide range of experimental petrology laboratories are represented by the current list of references and the data include, but are not limited to, constraints used in the calibration of rhyolite-MELTS and the provisional xMELTS model. Complex searches may be configured involving, for example, experimental conditions (P, T, fO2, duration, apparatus...) and constraints on the CIPW norm, Mg#, wt% or other compositional parameters of the bulk system or of individual phases. The LEPR data entry portal may also be used for private online storage of experimental results with, or without, a view to eventual publication.
- The pMELTS database is comprehensive repository of all the experimental results used to calibrate pMELTS, of which the MELTS calibration data are a subset. Search and download options are more limited for the pMELTS database than for LEPR but there are a few studies in the former that are not (yet) in the latter.
Teaching resources for thermodynamics, petrology and geochemistry (more coming soon):
- The NAGT On the Cutting Edge website contains a wealth of information and resources for teachers in all aspects of geosciences. In particular, the Teaching Phase Equlibria module contains information ranging from explanations of fundamental concepts of thermodynamics and phase diagrams to introduction to advanced thermodynamic software, such asTHERMOCALC and MELTS. The Petrology and Geochemistry collections also contain Thermodynamics / Phase Equilibria sections, plus numerous other teaching activities and exercises (including several that use data downloaded from repositories mentioned above).
Computing and web resources
Most of these have been employed in development of this website, and the tools it hosts, and are listed in acknowledgement of just how useful they have been (thank-you, whoever you are!):
- The phase diagram movies would not have been possible without the PDF Toolkit, SWFTools, the Ming Library and especially gazbming's excellent Ming Flash Examples and Tutorials using PHP site.
- This introduction to Collapsible Menus and this Use Gmail to Reduce Word HTML File Size tip (scroll down a bit to see it) make publishing documentation online a sinch. Note, however, that the location of the 'View as HTML' option in Gmail has moved; instead click 'View' in your e-mail message to open the attachment in Google Docs, then select 'View' and 'Plain HTML' to get raw and relatively clean code that you can view with 'Page Source' or a similar browser option.
- If you want to automate plotting of MELTS results, say, but do not want to use commercial software, such as MATLABTM, then GMT may be a viable alternative. GMT is the work of Paul Wessel and Walter Smith. It is primarily a mapping program but can also be used for x-y plots, histograms and much more; a Cookbook of 30 example scripts is provided. Windows users who do not want to use DOS batch files or Cygwin might be interested in UGESCE, which is provided by Thorsten Becker. This VirtualBox Linux (Fedora) installation includes, amongst other things, a copy of GMT and a graphical user interface for GMT, called iGMT.
- Jing (for Windows and Mac) and recordMyDesktop (an optional package within many Linux distributions) are both free and easy to use software programs for taking screenshots and recording screencasts. There are other options too.