PTQ_Comb

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...