Classification of GRV 020043

Determine whether the meteorite GRV 020043 is a chondrite or a primitive achondrite related to acapulcoite–lodranites.

Background

GRV 020043 exhibits unusually large 50Ti and 54Cr deficits, comparable to compositions associated with primitive achondrites. Its classification is therefore relevant for defining the range of isotopic compositions represented by NC chondrites and for interpreting the relationship between chondritic and differentiated parent bodies.

The paper notes that the meteorite’s classification affects whether it should be treated as evidence for an expanded isotopic range among chondrites or as a primitive achondrite genetically related to acapulcoite–lodranites. The authors leave this classification unresolved.

References

The H4 chondrite GRV 020043 has so far been the only chondritic sample showing large 50Ti–54Cr deficits (ε50Ti = –1.59±0.24 and ε54Cr = –0.48±0.10; Li et al., 2018; Williams et al., 2020), but it is unclear as to whether this sample is a chondrite or rather a primitive achondrite related to the acapulcoites-lodranites (Li et al., 2018).

— Origin of nucleosynthetic isotope variability in the NC reservoir: Evidence from Ti, Cr, and Mo isotopes  (2608.19786 - Wölfer et al., 20 Aug 2026) in Section 4.1.1, p. 14