Northwest Africa 10509, 10798, La'gad 003, unnamed 101, & unnamed 102
views of Northwest Africa 10509
credit: Weibiao Hsu)
82-g stone of Northwest Africa 10798. Click on image for enlargement.
credit: Ben Hoefnagels)
sample of NWA 10509. Thanks to Weibiao Hsu for the sample.
credit: Randy Korotev)
views of a lab sample of Northwest Africa 10798
credit: Randy Korotev)
from 7 pieces of La'gad 003
credit: Randy Korotev)
The Meteoritical Bulletin, No. 105
Mass: 660 g
Classification: Lunar meteorite (anorth)
Purchased by Ke Zuokai
in Dec. 2015 from a Moroccan dealer.
characteristics: A single, irregularly shaped stone lacking
fusion crust. Small white clasts are visible in a pale, finer-grained
Hsu, PMO) Fragments of
plagioclase (100 μm to sub-mm) set in recrystallized matrix of
fine-grained (~ 20 μm) olivine, pigeonite, and plagioclase. Olivine
fragments are less abundant.
average: An94±4Ab5±4) (n=8), olivine (Fa22-41,
FeO/MnO = 83-98), pigeonite (Fs17-59Wo3-22, FeO/MnO =
Lunar, anorthositic breccia.
g at PMO
Meteoritical Bulletin, No. 105
Purchase: 2016 May, August, September
Mass: 318.6 g
meteorite (feldspathic breccia)
History: A stone
was purchased by Ben Hoefnagels in May 2016 from a dealer in Ouarzazate,
Morocco. Subsequently additional material was found at the same find site
by the same nomad, and purchased by Ben Hoefnagels in August and September
characteristics: Six larger stones (110.9, 82.1, 32.6,
30.8, 16.9, and 15.4 g) plus many smaller stones (total 29.9 g). All stones
have the same distinctive appearance, lacking fusion crust but mostly
coated by orange weathering products. The fresh interior exhibits whitish
clasts in a light-gray matrix with visible vesicles.
Irving and S. Kuehner, UWS)
Breccia consisting of rounded to angular gabbroic anorthositic clasts,
related crystalline debris, rare mare basalt clasts and very fine grained
devitrified glassy clasts in a fine grained, partly vesicular matrix
composed of quenchiform crystals plus glass.
Minerals are anorthite, exsolved pigeonite, olivine (some forsteritic),
augite, subcalcic augite, magnesian orthopyroxene, unexsolved
pigeonite, ilmenite, Ti-chromite, troilite, minor primary Ba-Ca-K feldspar
and secondary barite.
Olivine (Fa6.0, FeO/MnO = 129; Fa53.7-60.6, FeO/MnO =
86-95; N = 4), pigeonite (Fs29.2Wo7.7, FeO/MnO = 47;
Fs45.3Wo5.6, FeO/MnO = 53; N = 2), augite (Fs18.1Wo39.3,
FeO/MnO = 41), orthopyroxene host (Fs59.4Wo2.1,
FeO/MnO = 62), clinopyroxene exsolution lamella (Fs25.3Wo41.0,
FeO/MnO = 45), plagioclase (An96.2-97.3Or0, N = 2).
Lunar (feldspathic regolith breccia).
Specimens: 20.66 g including one polished thin section at UWB; remainder with Mr. B.
Meteoritical Bulletin, No. 109
Saguia el Hamra,
Meteorite (feldspathic breccia)
History: Found in 2015 by nomads on a small hill named Grarat-Zawi,
and purchased by Darryl Pitt on behalf of MMGM from Mauritanian
dealers in the period August-October 2015.
Physical characteristics: A single,
very large stone (27.249 kg) found as a group of many pieces which fit
together (but with several missing pieces). The specimen lacks fusion
crust, but individual pieces have thin coatings of light-brown weathering
products. Fresh interiors exhibit angular, whitish clasts within a
Petrography: (A. Irving and
S. Kuehner, UWS) Breccia composed
predominantly of mineral clasts plus rare glass clasts and basalt clasts in
a finer grained, partly vesicular matrix. Minerals are anorthite, olivine,
pigeonite, orthopyroxene, exsolved pigeonite, subcalcic augite, Al-rich
chromite, ilmenite and baddeleyite. Minor amounts of secondary calcite and
barite are present.
Geochemistry: Olivine (Fa30.0-52.6,
FeO/MnO = 84-110, N = 4), pigeonite (Fs28.2-38.2Wo9.8-14.7,
FeO/MnO = 50-54, N = 3), orthopyroxene (Fs19.3Wo4.5,
FeO/MnO = 57), subcalcic augite (Fs49.6Wo28.3,
FeO/MnO = 59), plagioclase (An95.2-97.1Or0.1-0.2, N =
3). Bulk composition (R. Korotev, WUSL)
INAA of 10 subsamples from different portions of the reassmbled
mass gave the following mean abundances: (in wt.%) FeO 5.95±0.88, Na2O
0.34±0.02, BaO 0.51; (in ppm) Sc 13.6±2.6, Cr
930±210, Ni 140±160, La 2.3±0.6, Sm 1.0±0.2, Eu 0.75±0.06, Yb 0.85±0.14, Lu
0.13±0.02, Hf 0.65±0.13, Th 0.37±0.11.
(feldspathic regolith breccia). Based on closely similar bulk chemical
compositional data (determined by Dr. R. Korotev at WUSL utilizing the same INAA methods), it is likely that the
NWA 10509 stone and the material classified as NWA 10798 are paired portions
of the same disaggregated meteorite. Another lunar feldspathic meteorite
from a different location in the same dense collection area received the
name La’gad, but analyses by Dr. Korotev demonstrate that the La’gad stones
differ from the material described here, especially in having much higher
(by a factor of 6) abundances of Th and other lithophile elements.
Specimens: 33.21 g
including two polished endcuts at UWB; main mass at MMGM.
stones are compositionally heterogeneous and together are, along with NWA 6888 and NWA 10495,
the most contaminated with terrestrial barium among lunar meteorites.
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