129.4g Lunar Meteorite Slice Troctolitic Melt Breccia Large Showcase Piece NWA 14729
On Offer: 129.4 gram complete lunar meteorite slice of a rare and beautiful polymict anorthositic troctolite melt breccia. One of a handful of lunar melt breccias, and the only recognized to contain troctolitic clasts.
Handling Time: This piece is currently on loan and being displayed at the Orange Coast College Planetarium's Meteorite Exhibit. As such buyers should be aware that there is a two week handling time prior to shipping to allow for the planetarium to process and return the specimen. The display label from the OCCP exhibit can be included with the slice upon request.
Dimensions: 164 mm x 141 mm x 3.45 mm
Type: Lunar (polymict anorthositic troctolite melt breccia)
Official Name: NWA 14729
Year Found: 2021
Country: Northwest Africa
Parent body: This material originates from the Moon. This is material ejected from our only natural satellite when it was hit by a progenitor meteorite.
|Northwest Africa 14729|
Name: Northwest Africa 14729
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14729
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 2.3 kg
This is 1 of 10 approved meteorites classified as Lunar (melt breccia).
|Comments:||Approved 19 Mar 2022|
Writeup from MB 111:
Northwest Africa 14729 (NWA 14729)
Classification: Lunar meteorite (melt breccia)
History: Purchased from a Moroccan meteorite dealer in 2021.
Physical characteristics: Single stone, dark green-brown, sandblasted exterior. Sawcut surfaces reveal this meteorite to be a breccia with fragments of fine-grained light colored host rock set darker vesicular melt-rock matrix.
Petrography: (C. Agee, UNM) Electron microprobe analysis and reflected microscopy of a polished mount show this meteorite to be a polymict lunar melt breccia with an anorthositic troctolite host rock consisting of fine-grained olivine and lesser amounts of pyroxene poikilitically enclosed in plagioclase. The matrix consists of vesicular melt rock. and very fine-grained minerals and rock clasts. Trace amounts of chromite, ilmenite, troilite, and Fe-metal (low Ni) were detected.
Geochemistry: (A. Ross, UNM) Olivine Fa25.4±5.3, Fe/Mn=102±18, n=10; pigeonite Fs16.4±3.6Wo4.5±1.5, Fe/Mn=54±5, n=7; subcalcic augite Fs16.1±5.1Wo30.1±7.7, Fe/Mn=50±2, n=3; plagioclase An96.0±1.7, n=6.
Classification: Lunar (polymict anorthositic troctolite melt breccia), nomenclature based on Stoeffler et al. (1980). The Mg# of olivine and An-content of plagioclase of this meteorite are consistent with that of the Apollo Lunar Mg-suite (Warren, 1993).
Specimens: 27.6 g on deposit at UNM, Craig Zlimen and Mark Lyon hold the main mass.
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