吉哈拉 001 端件 - 84 g

JIKHARRA 001 polished end piece 84 g. with COA, IMCA #7256

Classification: Eucrite Melt Breccia S-high / W-moderate
Place/Time: 2022 in Libya (29°58’08.2” N 21°52’05.0” E)
Mass: 50kg (+1 tons)

History: Numerous fragments reportedly totalling to almost one metric ton were recovered in Northeastern Lybia. Fifty kg of it were subsequently purchased by the main mass holder from a meteorite dealer in Lybia.
Physical characteristics: Many brownish fragments some of which with small patches of fusion crust.
Petrography: Achondritic melt breccia composed of several cm-sized lithic clasts set in abundant recrystallized shock melt. Lithic clasts consist of calcic plagioclase and aggregates of fine-grained, 30-70 µm sized pigeonite crystals displaying patchy compositional zoning. The melt matrix is composed of recrystallized pigeonite displaying mottled compositional zoning and fine-grained, mostly fibrous feldspar. Minor phases include silica, Ti-chromite, ilmenite, and FeS. No metallic iron has been detected.
Geochemistry: patchily zoned pigeonite: Fs50.1±1.5Wo11.6±1.7 (Fs48.1-53.4Wo6.9-13.3, FeO/MnO=27-31, n=12); calcic plagioclase: An90.2±0.7 (An88.9-91.3, n=10)
Classification: by A. Greshake, submited, not official yet