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Meteorite from Mercury?

Posted by michael on from the long-way-from-home dept.

texchanchan writes "The BBC reports that a chunk of rock, clearly from space, might have originated on Mercury. Analysis of its chemical makeup leads to this tentative conclusion. Specifically, it seems to have originated on something with 'a core of molten iron [and] an outer covering of silicon and aluminium that formed a basaltic crust.' This meteorite classification site sticks to the earlier theory that NWA 011 is from a Vesta-like source."

1 of 16 comments (clear)

  1. Re:Am I missing something??? Nope...regrettably by rde · · Score: 3, Insightful

    The impression I got from the BBC article was that the meteorite came from a body considerably larger than Vesta. I'm not sure how that oxygen-isotope thingy they're talking about works, but if it's deficient in the chunkier elements, that would imply - to my mind - that it came from a big-assed body. If that's the case - and we can assume it's not from the moon or Mars - then it must've come from a really big asteroid, or from Mercury.

    So people're inferring that it's from Mercury through a process of elimination. Seems reasonable to me.