NWA 13253 Chondrite Meteorite Part Slice weighing 3.63g

Northwest Africa 13253 (NWA 13253)

Morocco

Purchased: 2019

Classification: Ordinary chondrite (H5)

History: Marc Jost (SJS) purchased the sample from Mohamed Hmani at the St. Marie aux Mines show in June 2019.

Physical characteristics: The 210. 6g stone is dark-brown in color, irregular in shape and lacks fusion crust. Small chondrules are visible on the surface. The cut face is pock marked and shows abundant chondrules surrounded by gray veinlets and troilite grains.

Petrography: Description and classification (A. Love, App) Sample has a recrystallized chondritic texture composed of distinct, densely packed chondrules and fragments surrounded by abundant weathered FeNi metal and FeS. Chondrules have an average apparent diameter of 504 μm (n=44) and show recrystallized mesostasis. Additional minerals are chromite, apatite, troilite, pentlandite and secondary plagioclase.

Geochemistry: (A. Love, App) Olivine (Fa_17.5±0.1, Fe/Mn=35.2±0.8, n=8), low-Ca pyroxene (Fs_16.2±0.1Wo_1.1±0.1, n=8).

Classification: Ordinary chondrite (H5, C-S2, W3). Based on mineral compositions and textures this is an H5.

Specimens: Marc Jost (SJS) holds the main mass. An endcut weighing 20.59 and a polished thinsection and epoxy mount are on deposit at App.