There are many spheres in thin section

[okstone]

A. I found it in the desert of Xinjiang.

B. The mass is 1532g and the density is 3.4g/cm3.

C. No magnetism.

D. I cut it into thin section and observed it under a microscope.

could it be a meteorite?

 

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[okstone]

It can react with hydrochloric acid to form bubbles, probably containing carbonate, which is almost nonexistent in meteorites. Maybe it is an Oolitic Limestone.

 

[okstone]

It seems to be affected by some kind of external force to form a black vein, which breaks down some spherules.

Thin section，Natural light.

View attachment 2.jpg
Thin section，Area A is magnified by 40 times，plane-polarized light.


Thin section，Area A is magnified by 40 times，cross-polarized light.

 

[okstone]

There are also two suspicious places: There seems to be olivine crystals in area B (the blue gray part under orthogonally polarized light), and there appears to be a vesicle in area C (seems to be a kind of glass, which is completely black under orthogonal polarization).
Recent news reports suggest that there is carbonate on the Bennu asteroid.
Ask the master's advice. Is it possible that it is a meteorite?

Thin section，Natural light. Areas A, B and C are marked with blue boxes.


Area B is magnified by 100 times，plane-polarized light.


Area B is magnified by 100 times，cross-polarized light. The blue gray part appears to be olivine crystals.


Area C is magnified by 40 times，plane-polarized light.There appears to be a vesicle in area C.


Area C is magnified by 250 times，plane-polarized light.There appears to be a vesicle in area C.

 

[okstone]

This is a strange stone, obviously not chondrite, It contains a lot of carbonate,but there seems to be evidence of impact. I found two melt pockets in the thin section， which containing flow-cooled glass.


a、c，plane-polarized light，b、d，cross-polarized light


a、b、c、d，plane-polarized light

 

[okstone]

I made another thin section from the same stone. Pyroxene seems to have melted in the thin section.


The thin section


plane-polarized light


cross-polarized light

 

[okstone]

I took dozens of photos and stitched them together into one. Although I'm not sure it's a meteorite, this color composition seems to be common in meteorite thin section. I will continue to explore it. If anyone has any suggestions, I would be grateful.


The photos were taken under cross-polarized light and stitched together.

 

[Naukoveckiy]

38:57
~probably containing carbonate, which is almost nonexistent in meteorites~
maybe this help you. maybe i wrong

 

[okstone]

38:57
~probably containing carbonate, which is almost nonexistent in meteorites~
maybe this help you. maybe i wrong

Thank you，Naukoveckiy. I'm just guessing ，I still need to find the right channel for professional testing to confirm.

In fact, there are hundreds of these stones I picked up in the oval belt about 2km, which is just one of them. The surface of the desert reveals these black stones, completely different from the surrounding gravel.

If they could be meteorites, they might have come from a planet with water, maybe Mars.

 

[Naukoveckiy]

hi. i think only lab.can prove it.

 

[okstone]

hi. i think only lab.can prove it.

Thank you, Naukoveckiy. I've sent samples to the lab, waiting for the test results.