Especially for the minerals that crystallize both in the magmatic and hydrothermal environments, like mica and tourmaline. The metal concentration, e.g., Sn and W, should be theoretically enriched in the hydrothermal fluid exsolved from granitic magma due to the high partition coefficient of Sn and W between melt and fluid. However, the concentration of these two elements is similar in the mica crystallized from magma and hydrothermal fluid.
Dear Dr. Fei Yang
I hope the following articles can help you to understand trace elements' partitioning between mica and tourmaline.
Article Mica-liquid trace elements partitioning and the granite-pegm...
Article Trace-element partitioning and boron isotope fractionation b...
Best Regards
Mohamed Faisal
1. Temperature
2. Pressure
3. Availability
4. Ionic radii
5. Valency and associated elements for charge balance
In addition to H. Dill points: coeval crystallization of competing minerals (e.g. cassiterite for Sn)
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