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ver. 5.2.1
2013 |
The basic core of the COMAGMAT-5.2 (2013) program includes the algorithm that has been used in previous versions of the COMAGMAT model (ver. 3.0-3.5) designed to simulate mafic magma crystallization processes
Sulfide version of the COMAGMAT program was developed as a part of a cooperative project “Ni-PGE potential of mafic and ultramafic magmas – a combined melt inclusion and numerical modelling approach” which was supported by AngloAmerican, BHP Billiton and Votorantim Metais through AMIRA project P962, by the Australian Research Council funding to the Centre of Excellence in Ore Deposits (CODES) and Russian Foundation of Basic Research (projects 08-05-00194 and 11-05-00268).
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Ariskin A.A., Bychkov K.A., Danyushevsky L.V., McNeill A.W., Barmina G.S., Nikolaev G.S. (2012) COMAGMAT-5: a new magma crystallization model designed to simulate mafic to ultramafic sulfide-saturated systems. Abs. 12th International Ni-Cu-(PGE) symposium (June 16-21, 2012, Guiyang, China), p. 15-18.
Ariskin A.A. Dayushevsky L.V., Bychkov K.A., McNeill A.W., Barmina G.S., Nikolaev G.S. (2013): Modeling solubility of Fe-Ni sulfides in basaltic magmas: The effect of Ni in the melt. Economic Geology (in press).
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ver. 3.72
2010 |
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Almeev, R. R., Holtz, F., Koepke, J. & Parat, F. (2006). Effect of small amount of H2O on the liquidus of olivine, plagioclase and clinopyroxene: an experimental study at 200 and 500 MPa. EMPG-XI. 11th - 13th September, University of Bristol UK.
Almeev, R. R., Holtz, F., Koepke, J. Parat, F., and Botcharnikov, R. (2007) The effect of H2O on olivine crystallization in MORB: Experimental calibration at 200 MPa. American Mineralogist (in press). |
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ver. 3.57
2004 |
First release similar to 3.52 with Ilm subroutine changed to escape some computative problems |
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ver. 3.65
2001 |
Specially calibrated to simulate crystallization of Fe-Ti enriched basaltic liquids |
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Ariskin A.A. The compositional evolution of differentiated liquids from the Skaergaard layered series as determined by geochemical thermometry. Russian Journal of Earth Sciences. 2003. Vol. 5, No. 1 (see Appendix 2) [read >>] |
Contact ariskin@geokhi.ru |
ver. 3.52
2000 |
(1) Ilmenite code was changed to correctly calculate Mg contents in Ilm; (2) K2O in Pl was also corrected. |
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Contact ariskin@geokhi.ru |
ver. 3.5
1999 |
More accurate Mt-melt and Ilm-models were integrated into the program which now allow one to calculate crystal-lization at water-saturated conditions starting with 0.5 wt% H2O in the melt. Other improvements include corrections of mineral-melt distribution coefficients for TiO2 in clino- and orthopyro-xenes, as well K2O in Pl. In addition, OXIDES file is now printed out to see Mt and Ilm compositions calculated on single cation basis. |
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Ariskin A.A., Barmina G.S. (1999) An empirical model for the calculation of spinel-melt equilibrium in mafic igneous systems at atmospheric pressure: II. Fe-Ti oxides. Contrib. Mineral. Petrol. V. 134. p. 251-263. [read >>]
Ariskin A.A. (1999) Phase equilibria modeling in igneous petrology: use of COMAGMAT model for simulating fractionation of ferro-basaltic magmas and the genesis of high-alumina basalt. J. Volcanol. Geotherm. Res. V. 90. p. 115-162. [read >>] |
Contact ariskin@geokhi.ru |
ver. 3.3
1998-01 |
This is INTERNET analogue of the COMAGMAT-3.0 release. |
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COMAGMAT-NET |
ver. 3.0
1993 |
This is a basic DOS-version distributed since 1992. See publications for more details. |
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Ariskin A.A., Barmina G.S., Frenkel M.Ya., Nielsen R.L. (1993) COMAGMAT: a Fortran program to model magma differentiation processes. Computers and Geosciences. V.19. p. 1155-1170. |
Contact ariskin@geokhi.ru |
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OTHER NOTES
(1) Do not hurry to conclude that COMAGMAT is incorrect if during test calculations the calculated crystallization sequences are found to differ from those you expected from a set of experimental data or petrological observations. Instead, try to understand the reason for these differences by setting small temperature shifts for different minerals or by slightly changing the pressure, redox conditions or water content in the melt.
(2) We strongly recommend that COMAGMAT be paired with the INFOREX experimental database. The INFOREX system includes an ability to create mineral-melt datafiles for a given range of compositions and conditions. Those files can be further imported to COMAGMAT to test mineral-melt equilibria temperatures in order to estimate the presence of a systematic shift for a particular mineral. These shifts can be set into the CORREC.DAT files to be used in further calculations.
(3) Before starting petrological calculations, try to model the whole crystallization sequences available in the INFOREX database for the compositional range of interest. Often, an additional small shift of the calculated temperatures is necessary to best fit the experimental data for these particular compositions. In general, the COMAGMAT model works best for tholeiite-like systems, however accounting for the recommendations, it may be also applied to mildly-alkaline and calc-alkaline basalts and andesites.
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