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.
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 | |||||||||||||||||||||||||||
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| Basic information |
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 |
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| Classification history: |
This is 1 of 10 approved meteorites classified as Lunar (melt breccia). |
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| Comments: | Approved 19 Mar 2022 | ||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14729 (NWA 14729) (Northwest Africa) Purchased: 2021 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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| Bibliography: |
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| Data from: MB111 Table 0 Line 0: |
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