Suppose mare regolith is heated to 2400 K, then left to cool slowly in a tank. Samples of powder regolith from the mare are about half glasses and half crystals of composition as shown below. Would some pure minerals separate into their own layer? Might one hope to find layers of pure metal oxides before the mix started to crystallize at 1700 K according to Bowen's reaction series
If they wouldn't separate as they cooled, what would they do? Is the low gravity an issue?
I've been working on very rough ideas for solar furnaces on the Moon, to model a virtual colony, and I'm trying to work out its general format and applications. Suggestions for reading at an introductory level are also welcome.
2400 K is above the melting point of all the constituent minerals, and all the metal oxides except MgO and CaO, while being below the temperature at which some of the oxygen would separate (at about 2700 K). It's my best guess at the appropriate temperature to try this. Bowen's reaction series begins at about 1700 K, so until the mix cools to that temperature, it shouldn't crystallize (other than tiny crystals of MgO and CaO floating around).