PTQ_Avg logo

PTQ_Avg is a supplementary program for PTQuick which calculates "simple averages": the points with shortest root-mean-squared distances to all the lines plotted on 2D diagrams.


PTQ_Comb logo

PTQ_Comb is a small program which generates combinations of mineral analyses for geothermobarometric investigations with PTQuick...


XFluid logoYou can use this small and simple freeware program to calculate compositions of C-O-H fluid at pressures from 1 bar to 100 kbar and temperatures from 400°C to 2300°C for many samples at once, according to: Zhang, C., Duan, Z.H., 2009. A model for C–O–H fluid in the Earth’s mantle // Geochimica et Cosmochimica Acta, V. 73, pp. 2089–2102...


PTQuick logoPTQuick is a handy ©MS Windows program for estimation of equilibrium parameters (temperatures, pressures, oxygen fugacities) for mineral parageneses using methods of classical geothermobarometry, i.e. by independent expressions and algorithms ("tools") developed by different authors...


PT_Gtrm logo

PT_Gtrm is a program for fitting continental conductive geotherms to clouds of PT points, e.g. to results of geothermobarometric investigations of mantle xenoliths. Models of H.N. Pollack & D.S. Chapman (1977) and D. Hasterok D. & D.S. Chapman (2011) are used.

About permutational approach in geothermobarometry

 Let's assume that you have got a great number of micro-probe analyses from a small area of a sample/thin section (e.g. 10 Opx, 10 Grt, 5 Bt and 5 Pl) and are going to estimate P-T parameters using the THERMOCALC and AX programs, or by the TWQ package of R.G. Berman et al. Which combination of analyses demonstrates the "best" (the most closely-grouped) intersections of the curves? In this example, you must check 10×10×5×5=2500 possible combinations...

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