NWA 14425 Enstatite EH3 #6 – 0,95 g

Northwest Africa 14425 (NWA 14425)

(Northwest Africa)

Purchased: 2021 Feb

Classification: Enstatite chondrite (EH3)

History: Purchased by Jason Whitcomb in February 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Mostly relatively small enstatite-forsterite-bearing chondrules (exhibiting a wide size variation, apparent diameter 380±410 µm, N = 24) are set in a fine grained matrix containing daubreelite, troilite, altered Si-bearing kamacite, perryite, schreibersite, oldhamite and albitic glass. Several chondrules contain relatively ferroan low-Ca pyroxene.

Geochemistry: Enstatite (Fs_1.3±0.9Wo_0.4±0.3, range Fs_0.3-4.1Wo_0.0-1.0, N = 19), forsterite (Fa_0.3±0.1, range Fa_0.3-0.4, N = 3), relatively ferroan low-Ca pyroxene (Fs_13.4±3.8Wo_3.0±1.1, range Fs_11.4-19.1Wo_4.2-1.9, N = 4).

Classification: Enstatite chondrite (EH3). The presence of relatively ferroan low-Ca pyroxene in addition to the dominant enstatite has been previously documented in EH3 chondrite Yamato 691.

Specimens: 24.83 g including one polished thin section at PSF; remainder with Mr. J. Whitcomb.