Volatiles in polar craters on the Moon are great, but so far apparently it is unclear how much is there. Though I still have a lot of reading to do, so far I haven't found any information about what the Moon's bedrock might be like. Down there where the surface hasn't been churned by meteor strikes into dust, which has then been baked by solar radiation for eons, can we say whether or not the rock will have some of those volatiles bound into their minerals?
There was a case made in an answer to a recent question on Mars that nitrogen has to be on Mars. It is very common and the whole solar system was formed of the same basic stuff - that's the part that also applies to the Moon. That seems a solid argument, alright (though I'm looking for more sources to get the details, because I'd like to know more). But the Moon's history is so different. Is there good reason to hope that when we make it into a good lava tube, there will be nitrogen-containing minerals to be found? Some hydrogen minerals? Perhaps some carbon?
Do the interiors of rock samples from the moon really represent the composition of the crust, or have they been altered by the impact churning process? Since all of the rocky planets were formed from the same accretion disk, shouldn't a certain percentage of the elements missing from the Moon's surface be there, at some distance below the surface? If not, how were they stripped off?