The Meteoritical Bulletin, No.
Northwest Africa 11801
2016 May 1
Purchased by Miao Bing-an in 2016 from Morocco.
characteristics: This meteorite is in
irregular and brecciated, partially covered with black fusion crust. A saw cut
reveals an abundance of fragments set in dark-colored matrix.
(B. Miao, H. Liu, Z. Xia, Guilin
University of Technology) The section is composed of abundant mineral
fragments and a few lithic clasts and glass set in a fine-grained matrix. The
mineral fragments, lithic clasts, and glass areas show irregular shapes and
variable textures with different sizes (from ~10 μm to ~4.1 mm
across). The matrix is made up of fine-grained minerals bound by glassy
cement. Mineral fragments include plagioclase, pyroxene, olivine, and minor
ilmenite, chromite, silica, Ni-Fe metal, troilite, armalcolite, k-feldspar.
The section contains various types of lithic clasts (anorthosite, gabbro,
troctolite, and crystalline impact melt breccia). Several glassy spheres
and veins were found in the thin section. One anomalously large glassy vein
(up to 2.7 mm thick) that crosscut the section was observed.
An91-96Or<0.4; pyroxene Wo4-36En7-69;
olivine Fo10-83. The Fe/Mn ratios of pyroxene and olivine in
this meteorite lie approximately along the lunar line, although the range
of values is very large (44-79 for pyroxene and 72-127 for olivine).
Specimen and a polished thin section are deposited in GUT