Geology

XFluid

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

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

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.

TC_Comb version 1.1

The new TC_Comb version 1.1 has been released. The most important improvement of the program is an extended support for calculations involving fluid components (H2O and CO2) and cordierite. A number of changes is associated with this support...

MSearch

MSearch

 You can use this small freeware program for fast filtration of known minerals by qualitative chemical composition and/or by presence/absence of specified substrings in their names and/or formulae. For example, it can help you to select minerals that may correspond to problematic microprobe analyses...

Approximation of reaction lines by single-segment parametric cubic Bezier curves

 Usage of parametric cubic Bezier curves on diagrams has a number of advantages if compared with traditional polyline representation (and with non-parametric curves)...

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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