Serving The Meteorite Community Since 2002

NWA 5245 R3

Here are some objects we found in the Rumuruti chondrite, NWA 5245 R3. All are in thin section and viewed in cross-polarized light.

We like the appearance of barred olivine; it is both ordered and varied. This 2mm diameter barred olivine chondrule with an igneous rim is much larger than usual for an R chondrite.





Also large. Less orderly. Field of view is 3mm wide.






Curiously, only part of this chondrule is barred. FOV=3mm.



No rim. At 0.5mm it is about the average apparent diameter of R chondrite chondrules.



Yellow BO chondrule formed and gained mass through several accretion and melting cycles.



The small red BO chondrule, too, went through several cycles. FOV=3mm.






Rumuruti chondrites are from the surface, the regolith, of the R parent body. This asteroidal soil has been tilled by impacts for eons. It is not surprising that we find these rounded fragments. FOV=3mm.









BO chondrule 0.3mm long.





BO chondrule 0.15mm in diameter, at the lower end of the size range in R chondrites.





An irregular chondrule containing two large “dusty” relict olivine grains. FOV=3mm.



The “dust” is fine particles of iron metal derived from the olivine by a reduction process. FOV=0.5mm.



Chondrule with a “dusty” relict olivine grain. FOV=3mm.



Meteorite Times Magazine Sponsors
Meteorite News
Meteorite Resources