Type 1 Unequilibrated Eucrite 43.69g I NWA 11897
|Northwest Africa 11897|
Name: Northwest Africa 11897
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11897
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 43.9 g
This is 1 of 81 approved meteorites classified as Eucrite-unbr. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
|Comments:||Approved 2 Sep 2018|
Writeup from MB 107:
Northwest Africa 11897 (NWA 11897)
Classification: HED achondrite (Eucrite, unbrecciated)
History: Purchased in March 2018 by Craig Zlimen and Dustin Dickens from a Moroccan meteorite dealer.
Physical characteristics: Fusion crusted exterior; sawcut reveals a fine-grained, gray interior.
Petrography: (C. Agee, UNM) This meteorite is a porphyritic basalt with pigeonite phenocrysts set in a groundmass of fine-grained quench crystals of pyroxene, plagioclase, silica, chromite, and Fe-sulfide. Pigeonite phenocrysts show igneous zoning.
Geochemistry: (C. Agee, UNM) pigeonite Fs45.5±8.4Wo5.2±2.0, Fe/Mn=36±2, n=16.
Classification: Unequilibrated, porphyritic eucrite; unbrecciated
Specimens: 8.9 g including a probe mount on deposit at UNM, Craig Zlimen and Dustin Dickens hold the main mass.
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