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Hola Forists. We have a question on meteorite shower, and that is, if all of the fragment of a fall, should be homogeneous in matrix constitution, we mean, same all color, same all kind of metal flecks, or it could be that some fragment are of one kind and some others different, that is, some have mixed matrix color and sparse small metal flecks and others have a unique matrix color and mixed flecks and veinlet of metal ?

Hasta la vista,

larense

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Larse, I would say that based on the law of averages, the material would be the same type and make-up. This providing that the host or parent body that liberated the material was of a homogeneous origin to begin with. Granted, interstellar dust particles would probably be picked up along the way, and those are heterogeneous, like snow flakes. What you would need would be one body acting on another body causing an event to cause a meteor shower, thus mixing the material of both bodies. From what I have read, most showers are caused from an event which are of the same material (i.e. Halley's comet, Wild-2, etc.) Again, just an uneducated guess from someone who loves meteorites, and of course I'm still learning. Jason

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Hola Jayray. Thanks for your opinion. The fact is that we bought 1,500 grams of a new NWA meteorite already classified ( NWA 4528 H5 ), and it shows perhaps two or three different matrix composition and arrengement of metal inside it. The most important view of the matrix is in the first picture with a mixed matrix( brown and grey colors ), and evenly scatered small metal flecks. But when we sanded some other fragments, we don´t found the same matrix, instead some fragments show a dark brown matrix, others a brown greenish matrix and the Fe-Ni present veinlets and different forms of specks, which you can see in the others pictures. Finally, a last picture of one of the only two fragments of the 1,500 grams lot, that shows the matrix and metal flecks as seen in the first picture, slice that we bought from another meteorite dealer.

Hasta la vista,

larense

post-879-1191511102_thumb.jpg

post-879-1191511442_thumb.jpg

post-879-1191511484_thumb.jpg

post-879-1191511520_thumb.jpg

post-879-1191511646_thumb.jpg

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Chondrites are definitely aren't homogenious on a fine scale, but on a very general scale

they are probably more homogenious than heterogenious.

for example there might be and average of 250,000 iron/nickle chondules per cubic meter

but that doesn't mean it would be acurate to say that there are 3 chondrules per cubic centimeter.

problem with that would be if there were veins of metal running through the chondrite

then again im not counting haha.

[Erik]

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