Jiddat al Harasis 876 (JaH 876)        19°30.26’N, 55°18.47’E

Zufar, Oman

Found: Jan 2013

Classification: Ordinary chondrite (L6)

History: Collected by SQU-UWO meteorite research team in January 2013

Physical characteristics: Physical Characteristics: A 481.17 g sample supplied by SQU, which has a mm thick dark brown-black fusion crust present on 3 out of 5 faces. There are no remaglypts or contraction cracks present on the fusion crust. Lichen has grown on a portion of the fusion crust and one surface of this chondrite has fractured off and consequently been weathered by terrestrial processes. The fourth face has been cut and polished. The sample is also magnetic.

Petrography (P. Hill, UWO) All of the chondrules are poorly defined and >90% lack opaque rims. A majority of coarse grains are olivine and pyroxene. Amongst the coarse olivine and pyroxene grains, there are two large (~2 mm diameter), fragmented radial pyroxene and granular chondrules present. The size of these chondrules is indicative of L or LL group. The mesostasis of RP chondrules is completely recrystallized into anhedral grains of olivine. There is strong evidence of deformation as seen by the high degree of chondrule fragmentation and cratering of the chondrules edges. The matrix has been completely recrystallized with secondary feldspar grains exceeding 50 μm and occurring frequently throughout the thin section. Large grains (~100 μm) of Ca-apatite are also observed between the grains of olivine and pyroxene in a porphyritic chondrule. The Fe-Ni oxides are primarily present as a network texture but coarse irregular grains of oxide are present throughout the thin section. Troilite is present primarily as inclusions within the chondrules and Fe-Ni oxide but many aggregates of oxide and troilite reach up to 100 μm in size. Pentlandite is also present as minor inclusions. Chromite is present as small inclusions within albite rich clasts. All of the Fe-Ni metal has been oxidized within the thin section but there is little evidence of weathering of silicate minerals besides iron oxidization. Weathering category is W3, shock stage is S4.

Geochemistry: Mineral composition and geochemistry (M. Beauchamp, P. Hill, UWO) Olivine, Fa_24.7±0.88 (n=30, PMD Fa=1.7); low-Ca pyroxene, Fs_20.8±1.00Wo_1.5±0.25 (n=15, PMD Fs=2.4).

Classification: Ordinary chondrite (L6, S4, W3).

Specimens: 1488 g type specimen, including polished thin section, are on deposit at SQU.