If all known classical geotermobarometers does not work... :)
Dear, Irakli! We conducted experimental studies of physicotechnical and elastic-anisotropic characteristics depending on the type of regional metamorphism. What input data do you know?
You could use reverse method using pseudosection calculations with THERMOCALC, Theriak-Domino and similar softwares.
If you have suitable lithologies then you might consider using illite crystallinity data and referring to works such as Leoni (2001) European Journal of Mineralogy, 13, 1109-1118 and other references within this.
It depends on many things. I would be curious to know which rocks you are working with and how low temperatures are, because it will help us helping you. I would like to add to other answers that there is also the phengite-chlorite multi-equilibrium calculations method (Vidal et al., 2001; Vidal & Parra, 2000 and subsequent papers) that allows to obtain P/T estimates from chlorite-phengite pairs (even at very low T < 300 °C). For very low T, the best -in my opinion- is to work with fluid inclusions in veins associated with your rocks.
Dear, Samuele Papeschi
If you are interested I can send you the brief information about the Geology and metamorphism of studied region.
It is too much quartz veins, and your idea to use the fluid inclusion method is very interesting. I will think about it.
Regards, Irakli
Dear Irakli Javakhishvili ,
Glad to have been of help. I don't personally do fluid inclusion studies, but I can suggest you a couple of persons in case.
Best, Samuele
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