Dear Sandun,

May I show you a proposal with respect to your second question, I have created with the program 'PowerPoint 10': It is the diagram of the combination of a P-T-t paths and real photomicrographs of thin sections that are set to the appropriate position.

Best regards,

Guenter

For question 2. You may use either TWQ or THERMOCALC programs

Dear Sandun,

For your question 1:

What do you mean by chemographic projections of mineral assemblage? Do you mean the AFM type diagrams? If you specify what type of projection do you want? It will help others to give you correct answer or some clue.

You may have a look on the page below, you may find it useful

http://ees2.geo.rpi.edu/MetaPetaRen/Software/GibbsWeb/Gibbs.html

For question 2:

Again, if I understood your question correctly, it is hard to generate P-T-t path simply based on petrographic observations. You may infer though from the petrograhic evidence you have in your samples. However, for correct P-T-t paths you have to have chemical composition of mineral assemblages you are interested in, and their age (t). There are several programs which can be used for P-T (and t, provided you know the age). Two already suggested by Alexeev, and you may check the link above for GIBBS.

Also, you may check PERPLEX, might be easy to use.

http://www.perplex.ethz.ch

Dear Hafiz

Thank you for your answer.

Yes I meant ACF, AKF, and AFM diagrams by the term "chemographic projections" . Do you know if there's any version of the programme Gibbs which run on the windows platform?

I did try to use the PERPLEX program earlier , but it is not very user friendly though.

Dear Sandun,

may this be interesting for you: http://onlinelibrary.wiley.com/doi/10.1029/2005GC000932/full

(but I have to admit that I have never worked with it, but it might be a start),

cheers

Dear Sandun,

As you have seen from the Gibbs HP, that only work on Mac.

I think if you spare some time and see the tutorials, you may find Perplex easy. 

If hard, there is another one also "Theriak-Domino"

http://serc.carleton.edu/research_education/equilibria/chem_projections.html

I did not use it yet, but it's also quite popular among metamorphic petrologists.

Hope works for you.

Hafiz

Dear Hafiz, If you find user friendly software please inform me please.

Thanks so much.