R3.9 Meteorite Classification

Class Description

The R3.9 classification is assigned to a meteorite from the Rumuruti (R) group, which is distinguished by its unique composition, including atypical magnesium and silicon ratios and a distinct oxygen isotopic signature compared to other major chondrite classes. This particular meteorite falls under petrologic type 3, indicating it retains a significant number of original chondrules, has undergone minimal alteration by water, and maintains a range of mineral compositions, placing it towards the higher end of the type 3 spectrum in terms of its metamorphic evolution.

R3.9 Meteorite Examples

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