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Tutte le aste / Etnografia / Martian (olivine-bearing shergottite) NEA 145 - 1.24 g
ortheast Africa 145 (NEA 145) Libya Purchased: 2024 Classification: Martian meteorite (Shergottite) History: Reportedly found in Libya by meteorite hunters in 2024 and purchased by Ali Muftah. Petrography: (K. Metzler, IfP) Olivine basalt, dominated by elongated pyroxene grains up to 3.5 mm (~50%) with smaller amounts of olivine (~25%) and interstitial plagioclase (~25%). Olivine grains display igneous zoning with increasing Fe concentrations from core to rim. Pyroxene shows a patchy chemical zoning. Plagioclase has been completely shock-transformed to maskelynite. Accessories are ilmenite, Cr-spinel, merrillite, and FeS. Geochemistry: Mineral compositions and geochemistry: Mean mineral compositions: Olivine Fa49.6±5.2 (Fa43.0-60.3); Fe/Mn (at.): 54.7; n=11. Pyroxene Fs32.0±7.0Wo19.8±9.0 (Fs20.6-39.6Wo7.6-34.3); Fe/Mn (at.): 31.5; n=14. Plagioclase (maskelynite) An49.9±2.9Or2.9±0.6 (An43.9-53.0Or2.0-3.9); n=11. Classification: Martian (olivine-bearing shergottite), based on texture and mineral chemistry. Shock stage: M-S4 Weathering grade: low Classifier: K. Metzler, IfP. This lot comes with certificate of authenticity. Thanks for your interest.
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