Himalayan Leucogranites, Temperature difference regarding anatectic conditions.
Anatexis is partial melting, and most granites are a product of partial melting. There are a number of geochemical diagrams for distinguishing granites of igneous and sedimentary parentage.
M. Qasim Jan Sir , Thank you for your answer.
It would be really helpful if you can explain or suggest anything based on temperature conditions for anatexis for Miocene granites from different source.
Minor- and major-element geochemistry and isotopes measurements are one side of the coin to decipher which source granites have been derived from; the other side is the field evidence in combination with a small-scale geodynamic analyis and large scale geological and petrological mapping campaigns in the field. I concede the latter suggestions are time-consuming and need physical and mental powers but at the very end the results obtained will provide a more solid scientific platform to build upon than anything else.
As I understand the question, what is the difference of temperature of partial melting between metabasic and metasedimentary rocks. Generally, metaclastic rocks (mica schist, metapelite) will melt at lower temperatures and produce a more voluminous and leucocratic melt than metabasic rocks (amphibolite or metabasalt). If you need a more detailed answer, you will need to add more background to your question. The actual temperatures of melting will depend on pressure, the amount of water, as well as protolith composition.
D.M. Evans Sir, I will add more background to the question. Thank You for your appropriate explanation.
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