Meteorite has expert stumped.

sjastro said:

While Randy Koretev was very non committal on meteorite fluorescence he has dug his heels in on this one.
He disputes the image of being of a 4.5 billion old chondrule by supplying this link.
I've responded by stating his link is about 'meteorwrongs', the image is of a meteorite and even if 'round things' do exist in meteorites it doesn't rule out chondrules as the sample is classified as a H5 chondrite originating from one of three possible asteroid candidates 6 Hebe, 3 Juno or 7 Iris.

Currently we have reached an impasse.....

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SelfSim said:

Perhaps sending the (Mars) imaging folk a more general query about where we can go to learn up more on how they expect to interpret any specific 'glows' they might find?

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We used a deep-ultraviolet fluorescence mapping spectrometer, coupled to a drill system, to scan from the surface to 105 m depth into the Greenland ice sheet. The scan included firn and glacial ice and demonstrated that the instrument is able to determine small (mm) and large (cm) scale regions of organic matter concentration and discriminate spectral types of organic matter at high resolution.

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The Spectral Types we identified had spectra that are similar to microbes, lignin-phenols, fused- ring aromatic molecules, including PAHs, and environmentally complex fulvic acids of microbial and multicellular origin.

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sjastro said:

Once in space basically nothing.
The composition of the meteorite depends on the type of asteroid being impacted and the region of the asteroid where the fragments originate.

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A fragment from a type S asteroid for example, if from the core which reaches the Earth is an iron meteorite; from the mantle-core boundary a Pallasite or stony-iron meteorite; and from the crust a stony meteorite.

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sjastro said:

So it is highly probable my image is of a 4.5 billion year old object.
Cool!

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