Lunar Meteorite: Northwest Africa 13937
| from The Meteoritical Bulletin, No. 110
Northwest Africa 13937 (NWA 13937)(Northwestern Africa) Classification: Lunar meteorite (feldspathic breccia) History: The meteorite was purchased from a dealer in Algeria. Physical characteristics: Eleven dark-grayish fragments without fusion crust. Petrography: (Ansgar Greshake, MNB) The meteorite displays a dark-grayish interior and is a feldspar-rich fragmental breccia predominantly composed of lithic and mineral clasts in partly shock melted and vesicular matrix. Lithic clasts are gabbroic and basaltic clasts up to 7 mm in size. Dominant minerals are olivine, low-Ca pyroxene, pigeonite, augite, and calcic plagioclase. Minor phases are ilmenite, Ti-bearing chromite, FeS, and kamacite. Some opx-chromite symplectites are present in olivine. The meteorite is highly shocked and plagioclase partly transformed into maskelynite. Geochemistry: olivine: Fa23.7±3.4 (Fa18.8-28.0, n=12, FeO/MnO=84±10); low-Ca pyroxene: Fs22.5±0.2Wo4.4±0.2 (Fs22.2-22.8Wo4.0-4.6, n=6, FeO/MnO=48±3); pigeonite: Fs32.7±0.9Wo12.7±1.8 (Fs31.7-34.0Wo10.6-15.9, n=6, FeO/MnO=48±3); augite: Fs12.3±1.5Wo39.1±3.4 (Fs11.0-15.2Wo32.6-41.8, n=6, FeO/MnO=37±2); calcic plagioclase: An97.4±0.3 (An96.9-97.8, n=10) Classification: Lunar meteorite (feldspathic breccia) Specimens: Type specimen (24.3 g) at MNB. Hanno Strufe and Ismaily Sidi Mohamed. |
Randy Says… I have not studied NWA 13937. It may be another stone of the NWA 8046 clan. |
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