Possibilities of material transfer from a celestial body which crashes into a planet

I am building a world where a rogue moon (or rogue planet or other larger celestial body) partially crashes into the main planet; the the residual shards would then form a smaller moon which becomes trapped in orbit around the planet. This is similarly to the giant impact hypothesis, which is one potential explanation to how our own moon may have been formed.

The celestial body which crashed in to the planet contains dust/soil similar to that of the dust on our moon, which has exotic properties (exact properties is irrelevant) and is highly useful for magical purposes. In the giant impact hypothesis for the formation of our moon, there are inconsistencies when it comes to the material composition - there are both similarities and differences between the material on the moon and on Earth. E.g., the iron oxide (FeO) content is very different but the oxygen isotopic ratios are essentially the same. So this means that there might have been some partial/imperfect exchange of material, but there are no solid evidence for it.

Would it be possible for such collision to transfer material from the moon to the planet it crashed in to?

Follow up questions:

Are there any evidence that moon dust have been incorporated into the Earth regolith (i.e., are there any evidence of such transfer in our world)?

Which properties of the moon dust would be required if I want it to have the ability to form crystals/solid rock over time?

posted over 7 years ago

Benjamin‭

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