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Lunar Meteorite

Northwest Africa 8046, 10309, 10461, 10609, 10643, 10649, 10756, 10822, 10901, 11029, 11266, 11269, 11273, 11303, 11379, & 11428

presumed paired stones that are possibly-to-probably also paired with

Northwest Africa 2425, 11331, 11367, 11407, 11421, 11444, 11457, 11460, 11474, 11515, 11517, 11532, 11695, 11783, 11787, 11789, and maybe others

Northwestern Africa, most (maybe all) from Algeria

 

 

Two views of Northwest Africa 2425. Click on image for enlargement
(photo credit: Nick Gessler)

 

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Northwest Africa 8046
(photo credit: Mike Hankey)

 

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Two slices of NWA 8046. Click on images for enlargement.
(photo credit: Mike Hankey)

 

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Two sawn faces of Northwest Africa 10461
(photo credit: Jean Redelsperger)

 

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Two sawn faces of Northwest Africa 10609
(photo credit: Gary Fujihara)

 

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Two views of Northwest Africa 10643
(photo credit: Jean Redelsperger)

 

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Sawn faces of Northwest Africa 10822
(photo credit: Matt Morgan)

 

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Two sides of a slice of Northwest Africa 10901. Click on image for enlargement.
(photo credit: Sean Tutorow)

 

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Northwest Africa 11029 in the field.
(photo credit: Ben Hoefnagels)

 


Two sides of an endcut of Northwest Africa 11266
(photo credit: John Higgins)

 

Northwest Africa 11269
(photo credit: Ken Regelman)

 

Two stones of Northwest Africa 11273
(photo credit: Rob Wesel)

 

 

Two sides of one of the Northwest Africa 11303 stones
(photo credit: Ben Sinclair)

 

One of the Northwest Africa 11331 stones
(photo credit: Pierre-Marie Pelé)

 

A slice of Northwest Africa 11379
(photo credit: Bob Falls)

 

Four of the many of Northwest Africa 11407 stones (1–4 grams each)

(Image credit: I “borrowed” these photos from a sales site. Let me know if they are yours.)

 

An 11-g stone of Northwest Africa 11421. Click on image for enlargement.
(photo credit: Tomasz Jakubowski)

 

Three of the many of Northwest Africa 11444 stones (6–9 grams each)

 (Image credit: Ben Sinclair)

 

Photomicrograph of a thin section of Northwest Africa 11457

(Image credit: Ann-Kathrin Kraemer and Addi Bischoff)

 

Three of the Northwest Africa 11472 stones
(photo credit: Mendy Ouzilou)

 

Sawn face of an NWA 11472 stone
(photo credit: Dustin Dickens)

 

Two sides of a Northwest Africa 11517 stone with 5-cm scale bar at the bottom. Click on image for enlargement.
(photo credit: Anthony Love)

 

A slice of NWA 11517
(photo credit: Anthony Love)

 

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Sawn faces of four of the smaller Northwest Africa 10309 stones. Click on image for enlargement.

(photo credit: Randy Korotev)

 

 

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Two sides of a lab sample of NWA 10609, polished on left. Click on image for enlargement. Thanks to Gary Fujihara for the sample
(photo credit: Randy Korotev)

 

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Two views of a lab sample of Northwest Africa 10649. Click on image for enlargement.
(photo credit: Randy Korotev)

 

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Two sides of another lab sample of Northwest Africa 10649. Click on image for enlargement. Thanks to Mendy Ouzillou for the sample.
(photo credit: Randy Korotev)

 

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Two views of a lab sample of Northwest Africa 10756. Click on image for enlargement.
(photo credit: Randy Korotev)

 

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Two sides (unpolished on left, polished on right) of lab sample of NWA 10822. Click on image for enlargement. Thanks to Matt Morgan for the sample.
(photo credit: Randy Korotev)

 

 

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Lab sample of Northwest Africa 11029. Click on image for enlargement
(photo credit: Randy Korotev)

 

Slices from 4 small stones of NWA 11266. Millimeter ticks for scale. Click on image for enlargement
(photo credit: Randy Korotev)

 

Two views of lab sample of NWA 11269. Click on image for enlargement.
(photo credit: Randy Korotev)

 

Two views of a lab sample of NWA 11273
(photo credit: Randy Korotev)

 

 

Two views of lab sample of NWA 11379. Click on image for enlargement.
(photo credit: Randy Korotev)

Two views of a lab sample of NWA 11428
(photo credit: Randy Korotev)

 

 

Sawn face (top) and exterior (bottom)of Northwest Africa 11460. Click on image for enlargement.
(photo credit: Randy Korotev)

 

Lab sample of NWA 11515. Click on image for enlargement. Thanks to Martin Goff for the sample.
(photo credit: Randy Korotev)

 

from The Meteoritical Bulletin, no. 107.

Northwest Africa 2425

(Northwest Africa)
Purchased: 2016
Mass: 810 g

Lunar meteorite (feldspathic breccia)

Physical characteristics: Weathered, red caliche stain, dull, no fusion crust, etched by ventifaction. Cut appearance: near-black matrix with gray clasts.

Petrography: (P. Warren, UCLA) The rock is a thoroughly polymict lunar highland breccia, mostly plagioclase, with clasts up to 10 mm but dominated by extremely fine-grained chaotic impact debris. A search for regolithic glass spheroids found only one, 0.2 mm, very round and undevitrified.

Geochemistry: Mineral compositions and geochemistry: Plagioclase: An95.9+/-1.3 (N=19). Low-Ca pyroxene: Fs33±8Wo4.3±0.9 (N=11), high-Ca pyroxene: Fs17±4Wo40±2 (N=7). Pyroxene FeO/MnO (wt.) averages 55±8 (N=24). Bulk composition results from INAA and fused-bead EPMA include Al2O3 = 27.1 wt%, Mg# = 73 mol%, Th = 0.13 ppm. The glass spheroid is similarly anorthositic (26 wt% Al2O3).

Classification: The meteorite is a lunar highland polymict breccia.

 

from The Meteoritical Bulletin, no. 103.

Northwest Africa 8046

(Northwest Africa)
Purchased: 2012 Dec
Mass: 47.3 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Michael Hankey in December 2012 from a dealer in Zagora, Morocco.

Physical characteristics: A single 47.3 g stone lacking fusion crust with visible whitish clasts.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of numerous mineral fragments in a finer-grained matrix. Minerals are anorthite, olivine, unexsolved pigeonite, subcalcic augite, exsolved pigeonite, fayalite, silica polymorph, ilmenite and rare kamacite.

Geochemistry: Olivine (Fa31.0-48.4, FeO/MnO = 80-97), low-Ca pyroxene (Fs58.9Wo4.7, FeO/MnO = 59), subcalcic augite (Fs11.3Wo26.9, FeO/MnO = 37), orthopyroxene host (Fs53.4Wo4.0, FeO/MnO = 53), clinopyroxene exsolution lamellae (Fs27.7Wo39.8, FeO/MnO = 52). Bulk composition (R. Korotev, WUSL): INAA of subsamples gave mean abundances (in wt.%) FeO 4.4, Na2O 0.32, and (in ppm) Sc 7.9, La 1.8, Sm 0.77, Eu 0.76, Yb 0.59, Th 0.2.

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 10.1 g (including a polished end-cut specimen, a slice and a polished mount) are at UWB. The remainder is held by Mr. M. Hankey.

 

from The Meteoritical Bulletin, No. 104

Northwest Africa 10309

(Northwestern Africa)
Purchased: 2015 August
Mass: 16,518 g

Classification: Lunar meteorite (feldspathic breccia)

History: A group of similar stones (total weight 16518 g, the largest weighing 6404 g) were found together at an undisclosed location in Mauritania, and were purchased by Darryl Pitt in August 2015 from a dealer in Mauritania.

 

Physical characteristics: All pieces lack fusion crust but the exteriors exhibit a thin desert patina. Interiors consist of angular white clasts (up to 1.5 cm across, some with minor red-brown staining) set within a fine grained, medium-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of anorthite, pigeonite (some exsolved), orthopyroxene, subcalcic augite, olivine, chromite (both Ti-rich and Ti-poor varieties) in a finer grained, partly vesicular matrix containing kamacite, troilite and Ni-poor taenite.

Geochemistry: Olivine (Fa8.6-54.3, FeO/MnO = 82-96, N = 4), orthopyroxene (Fs18.7Wo2.8, FeO/MnO = 56), subcalcic augite (Fs18.1Wo31.8, FeO/MnO = 60), low-Ca pyroxene host (Fs50.4Wo6.1, FeO/MnO = 63), augite exsolution lamellae (Fs24.2Wo41.4, FeO/MnO = 50), plagioclase (An95.8-96.1Or0.2, N = 2).

Classification: Lunar (feldspathic regolithic breccia).

Specimens: 22.16 g including one polished thin section at UWB; main mass with DPitt.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10461

(Northwest Africa)
Purchased: 2015 August
Mass: 285.75 g

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Jean Redelsperger from Aziz Habibi in Agadir, Morocco, August 2015. Reportedly found near the border with Mauritania.

Physical characteristics: Two identical appearing pieces 233.8 g and 51.95 g, with irregular exterior, no fusion crust. A saw cut reveals a polymict breccia with numerous fragmental light and dark clasts.

Petrography: (C. Agee, UNM) This breccia has numerous fragmental olivine, pyroxene, and plagioclase grains. There are also microgabbro clasts scattered throughout, as well as shock melt veins and pockets.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa26.8±8.5, Fe/Mn=93±9, n=23; low-Ca pyroxene Fs31.9±9.5Wo4.6±2.8, Fe/Mn=58±6, n=16; augite Fs23.4±10.5Wo34.6±9.8, Fe/Mn=53±10, n=10; plagioclase An96.1±0.5, n=19; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.3±0.4, TiO2=0.19±0.05, Al2O3=28.9±2.5, Cr2O3=0.10±0.03, MgO=6.5±2.5, FeO=4.3±1.3, MnO=0.06±0.02, CaO=16.1±1.4, NiO=0.01±0.01, Na2O=0.35±0.02, K2O=0.04±0.01 (all wt%), n=10.

Classification: Lunar (feldspathic breccia)

Specimens: 20.11 g including a probe mount on deposit at UNM, Jean Redelsperger holds the main mass.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10609

(Northwest Africa)
Purchased: 2016
Mass: 43.02 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Gary Fujihara from Morocco, 2016.

Physical characteristics: Single stone, weathered exterior without fusion crust. Cut and polished surface reveals numerous white feldspathic clasts set in a dark-gray groundmass. Some of the feldspathic clasts have a reddish tint.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a fragmental breccia with numerous olivine, pigeonite, and augite grains set in a dominant feldspathic matrix. Lithic and melt clasts with vesicles were also observed.

Geochemistry: (C. Agee and S. Spilde, UNM) Olivine Fa38.9±14.5, Fe/Mn=94±8, n=11; pigeonite Fs39.4±7.5Wo9.2±6.1, Fe/Mn=61±4, n=8; augite Fs21.1±4.7Wo38.3±3.4, Fe/Mn=50±4, n=3; plagioclase An95.7±0.7, n=6.

Classification: Lunar feldspathic breccia.

Specimens: 8.66 g including a probe mount on deposit at UNM, Gary Fujihara holds the main mass.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10643

(Northwest Africa)
Purchased: 2016
Mass: 43.56 g

Lunar meteorite (feldspathic breccia)

History: Purchased from Jaouad Chaoui in Marrakesh, Morocco, December 2015; reportedly found in Mauritania.

Physical characteristics: Single stone, weathered exterior without fusion crust; broken surface reveals numerous white feldspathic clasts set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) This is a highly feldspathic breccia with primarily magnesian olivine (Fa20) and pyroxene fragments scattered throughout. Minor amounts of more iron-rich olivine (Fa41) and pigeonite (Fs66Wo23) were detected. Vesicular shock melt veins and pockets are also present.

Geochemistry: (C. Agee and S. Spilde, UNM) Olivine Fa20.0±2.0, Fe/Mn=84±6, n=12; pigeonite Fs33.5±8.9Wo9.4±8.6, Fe/Mn=63±11, n=10; augite Fs22.9±2.3Wo40.1±0.8, Fe/Mn=58±5, n=2; plagioclase An97.0±0.5, n=5; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.5±0.7, TiO2=0.15±0.07, Al2O3=30.7±2.7, Cr2O3=0.06±0.04, MgO=5.2±1.9, FeO=2.9±1.1, MnO=0.04±0.00, CaO=17.0±1.0, NiO=0.01±0.01, Na2O=0.37±0.02, K2O=0.03±0.01 (all wt%), n=3.

Classification: Lunar (feldspathic breccia).

Specimens: 8.8 g including a probe mount on deposit at UNM; Jean Redelsperger holds the main mass.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10649

(Northwest Africa)
Purchased: 2015 December
Mass: 41.3 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Fabien Kuntz in December 2015 from a dealer in Zagora, Morocco.

Physical characteristics: A single dark gray, uncrusted stone (41.3 g) with visible whitish clasts.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of mineral clasts of anorthite, olivine, pigeonite, diopside, exsolved pigeonite, troilite, kamacite, taenite, ilmenite, fayalite and chromite in a finer matrix of the same minerals.

Geochemistry: Olivine (Fa25.0-33.7; Fa82.9; FeO/MnO = 82-87, N = 3), pigeonite (Fs45.8Wo6.8, FeO/MnO = 58), diopside (Fs7.6Wo44.9, FeO/MnO = 24, Cr2O3 = 0.8 wt.%), orthopyroxene host (Fs42.4Wo3.8, FeO/MnO = 50), clinopyroxene lamella (Fs19.4Wo40.9, FeO/MnO = 39), plagioclase (An96.3-96.5Or0.1, N = 2).

Classification: Lunar (feldspathic breccia.)

Specimens: A 8.53 g polished endcut piece is at PSF; remainder with Kuntz.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10756

(Northwestern Africa)
Purchase: 2015 September
Mass: 125 g

Lunar meteorite

History: Purchased by Eric Twelker in September 2015 from a Moroccan dealer at the Denver Show.

Physical characteristics: A single stone (125 g) lacking fusion crust and consisting of beige, white and red-brown stained clasts in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of shocked gabbroic clasts and related crystalline debris, plus sparse devitrified glass clasts in a finer matrix containing vesicular glass. Minerals are olivine, pigeonite, exsolved pigeonite, augite, anorthite, Ti-poor chromite, Ti-rich chromite and ilmenite. Minor secondary calcite veinlets and barite are present.

Geochemistry: Olivine (Fa19.1-41.9, FeO/MnO = 69-78, N = 4), pigeonite (Fs41.0Wo5.2, FeO/MnO = 51), augite (Fs9.8Wo­, FeO/MnO = 36), low-Ca pyroxene host (Fs56.7Wo5.6, FeO/MnO = 56), clinopyroxene exsolution lamella (Fs30.2Wo39.1, FeO/MnO = 52), anorthite (An96.8Or0.2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.5 g including one polished thin section at UWB; remainder with Twelker.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10822

(Northwestern Africa)
Purchase: 2016 September
Mass: 56 g

Lunar meteorite (feldspathic breccia)

History: Reportedly found in 2015, purchased by Matt Morgan and Lee Morgan in Morocco on June 26, 2016.

Physical characteristics: Single stone; saw cuts reveal a feldspathic breccia with numerous white feldspar clasts (1-4 mm) set in a dark-gray matrix. There are also scattered orange-brown clasts up to ~4 mm that consist primarily of pyroxene.

Petrography: (C. Agee, UNM) This meteorite is mixture of a fine-grained domains, large fragmental plagioclase crystals, and shock melt veins; some of the veins have ~100 μm-size vesicles. There are orange-brown domains consisting of pigeonite grains with augite exsolution lamellae and interstitial plagioclase or melt veins.

Geochemistry: (C. Agee and M.Spilde, UNM) olivine Fa32.7±9.0, Fe/Mn=97±4, n=11; pigeonite Fs40.7±4.8Wo8.2±3.5, Fe/Mn=59±6, n=5; augite Fs24.9±14.2Wo37.6±4.7, Fe/Mn=53±10, n=5; orange-brown pyroxene: pigeonite Fs36.4±1.6Wo5.2±3.0, Fe/Mn=61±6, n=4; augite Fs18.3±0.3Wo39.4±0.3, Fe/Mn=54±9, n=2; plagioclase An96.4±0.7Ab3.5±0.7Or0.1±0.1, n=6.

Classification: Lunar (feldspathic breccia).

Specimens: 11.7 g including a probe mount on deposit at UNM, MtMorgan and Lee Morgan hold the main mass.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10901

(Northwest Africa)
Purchased: 2015
Mass: 68.04 g

Lunar meteorite

History: Purchased in 2015 by Brahim Tahiri in Morocco and sent to his partner Sean Tutorow for analysis.

Physical characteristics: Single stone, irregular exterior, no fusion crust. A saw cut reveals light-gray feldspathic clasts (up to 2 cm) and some smaller fragmental white plagioclase grains set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) This is a polymict feldspathic breccia showing several different textural domains: 1) large (centimeter-sized) poikilitic plagioclase with olivine and pyroxene inclusions, 2) zones of fragmental plagioclase, olivine, and pyroxene, 3) cataclastic zones of fine-grained silicates, 4) vesicular shock melt veins and pockets. Iron metal detected, the largest grain observed was ~150 μm in diameter.

Geochemistry: (C. Agee and S. Spilde, UNM) Olivine Fa42.0±13.4, Fe/Mn=98±7, n=6; pigeonite Fs54.7±9.1Wo7.0±2.3, Fe/Mn=63±3, n=5; augite Fs28.7Wo40.3, Fe/Mn=56, n=1; plagioclase An96.6±0.4, n=4; Shock melt (proxy for bulk meteorite composition): SiO2=44.7, TiO2=0.37, Al2O3=24.1, Cr2O3=0.16, MgO=7.2, FeO=7.2, MnO=0.10, CaO=14.7, NiO=b.d.l., Na2O=0.31, K2O=0.02 (all wt%), n=1.

Classification: Lunar meteorite. Intermediate breccia based on FeO and Al2O3 content.

Specimens: 13.76 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

 

from The Meteoritical Bulletin, No. 106

Northwest Africa 11029

(Northwest Africa)
Purchased: 2016 June
Mass: 75 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Ben Hoefnagels in June 2016 from a dealer in Taliouine, Morocco.

Physical characteristics: A single stone (75 g) lacking fusion crust and exhibiting whitish to beige clasts in a medium-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular clasts of anorthite, olivine, pigeonite, subcalcic augite, augite, silica polymorph and ilmenite in a finer, fragmental matrix of the same minerals plus minor kamacite and barite.

Geochemistry: Olivine (Fa19.8-50.6, FeO/MnO = 68-83, N = 3), pigeonite (Fs24.9-39.8Wo8.4-9.6, FeO/MnO = 48-54), subcalcic augite (Fs27.6Wo29.0, FeO/MnO = 53), augite (Fs7.8Wo43.4, FeO/MnO = 30), plagioclase (An96.1-96.3Or0.1, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 15.1 g including a polished endcut at UWB; remainder with Mr. B. Hoefnagels.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11269

 

(Northwestern Africa)

Purchased: 2017 April

Mass: 220 g

 

Lunar Meteorite (feldspathic breccia)

 

History: A stone excavated from a site near Tindouf, Algeria was purchased by Ken Regelman in April 2017 from a Moroccan dealer.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of mineral clasts of anorthite, olivine, exsolved pigeonite, pigeonite, augite, Ti-chromite, ilmenite, Cr-Al-Ti-Fe spinel, kamacite and troilite in a finer grained matrix containing small vesicles.

 

Geochemistry: Olivine (Fa7.9-48.4, FeO/MnO = 94-98, N = 4), orthopyroxene (Fs19.2-31.3Wo2.5-4.1, FeO/MnO = 61-63, N = 2), augite (Fs7.2-17.8Wo44.3-40.7, FeO/MnO = 38-43, N = 2), plagioclase (An96.3-97.3Or0.1-0.2, N = 2).

 

Classification: Lunar (feldspathic regolith breccia).

 

Specimens: 20.05 g including one polished endcut at UWB; remainder with Mr. K. Regelman.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11273

 

(Northwestern Africa)

Purchased: 2017 April

Mass: 2808 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Material excavated from a site near Tindouf, Algeria was purchased by a consortium of collectors (Rob Wesel, Eric Twelker and Jason Phillips) in April 2017 from Moroccan dealers.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of mineral clasts of anorthite, olivine, exsolved pigeonite, pigeonite, augite, chromite, Ti-Cr-Fe spinel, kamacite, taenite and troilite in a finer grained matrix containing small vesicles and minor barite. Rare basalt clasts and glass fragments are also present.

 

Geochemistry: Olivine (Fa8.7-59.7, FeO/MnO = 89-111, N = 4), pigeonite (Fs28.8Wo11.2, FeO/MnO = 56), clinopyroxene host (Fs15.3Wo40.9, FeO/MnO = 44), orthopyroxene exsolution lamella (Fs34.0Wo2.7, FeO/MnO = 56), augite (Fs16.8Wo41.7, FeO/MnO = 62), plagioclase (An95.9-96.5Or0.2, N = 2)).

 

Classification: Lunar (feldspathic regolith breccia).

 

Specimens: 37 g including one polished slice at UWB; remaining pieces shared by Mr. R. Wesel, Mr. E. Twelker and Mr. J. Phillips.

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11303

 

(Northwestern Africa)

Purchased: 2017 March

Mass: 6000 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Material excavated from a site near Tindouf, Algeria, was purchased by Dustin Dickens in March 2017 from a Mauritanian dealer. The coordinates of the site are unknown.

 

Physical characteristics: Many small fragments coated by pale reddish-brown terrestrial weathering products. The fresh interiors of the largest fragments exhibit white to beige clasts in a dark gray, fine-grained matrix.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral grains of anorthite, olivine, orthopyroxene, exsolved pigeonite, ferroan pigeonite, augite, ilmenite, Ti-chromite and fayalite in a partly vesicular matrix containing minor kamacite and barite.

 

Geochemistry: Olivine (Fa26.7-47.2, FeO/MnO = 75-81, N = 2), orthopyroxene (Fs24.1Wo3.6, FeO/MnO = 67), orthopyroxene host (Fs47.1Wo3.3, FeO/MnO = 68), ferroan pigeonite (Fs52.4Wo18.8, FeO/MnO = 67), augite (Fs8.0Wo44.3, FeO/MnO = 35), plagioclase (An96.7-97.4Or0.2-0.1, N = 2).

 

Classification: Lunar (feldspathic regolith breccia).

 

Specimens: 20.0 g including one polished endcut at UWB; remainder with Mr. D. Dickens.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11331

 

(Northwestern Africa)

Purchased: 2017 April

Mass: 318 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Material excavated from a site near Tindouf, Algeria was purchased by Pierre-Marie Pelé in April 2017 from a dealer in Rissani, Morocco.

 

Physical characteristics: The stones (total weight 318 g) have distinctive reddish-brown, clay-rich exterior coatings. Fresh interiors exhibit whitish clasts in a dark-gray matrix.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of olivine, anorthite, exsolved pigeonite, orthopyroxene, unexsolved pigeonite, augite, chromite and ilmenite, plus sparse glass fragments, in a finer grained partly vesicular matrix.

 

Geochemistry: Olivine (Fa20.1-53.8, FeO/MnO = 94-109, N = 3), orthopyroxene (Fs30.6Wo3.4, FeO/MnO = 54), low-Ca pyroxene host in exsolved pigeonite (Fs41.6Wo5.5, FeO/MnO = 57), pigeonite (Fs25.4Wo9.8, FeO/MnO = 54), augite (Fs10.0Wo42.9, FeO/MnO = 40), plagioclase (An96.4-96.7Or0.2, N = 2).

 

Classification: Lunar (feldspathic regolith breccia).

 

Specimens: 20.07 g in the form of a polished endcut at PSF; remainder with P. Pelé.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11367

 

(Northwestern Africa)

Purchased: 2017 April

Mass: 305 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Purchased from a meteorite dealer by the owner, in Erfoud, April 2017.

 

Physical characteristics: Two stones (127 and 178 g) with no fusion crust. The fresh interior exhibits white angular clasts in a medium-gray matrix.

 

Petrography: (J.-A. Barrat, IUEM) Anorthite clasts An96.0±0.2 (N=6). The compositions of the phases from a noritic clast are: olivine Fa53±0.3, Fe/Mn=112±13 (N=9), anorthite An95.0-95.8, and pigeonite with augite exsolutions (respectively Fs43.2±0.6Wo4.8±0.8, Fe/Mn=65±5 (N=11), and Fs20.8±0.8Wo39.8±1.8, Fe/Mn=60±16 (N=3).

 

Geochemistry: Anorthite clasts An96.0±0.2 (N=6). The compositions of the phases from a noritic clast are: olivine Fa53±0.3, Fe/Mn=112±13 (N=9), anorthite An95.0-95.8, and pigeonite with augite exsolutions (respectively Fs43.2±0.6Wo4.8±0.8, Fe/Mn=65±5 (N=11), and Fs20.8±0.8Wo39.8±1.8, Fe/Mn=60±16 (N=3.

 

Classification: Lunar (feldspathic breccia)

 

Specimens: 21.5 g including a polished thick section.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11379

 

(Northwestern Africa)

Found: 2017

Mass: 150.87 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Purchased by Bob Falls in May 2017 from a dealer in Zagora, Morocco.

 

Physical characteristics: This fresh stone (150.87 g) lacks fusion crust and consists of angular white to beige clasts in a dark-gray matrix.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of mineral clasts of anorthite, olivine, orthopyroxene, pigeonite, exsolved pigeonite, augite, ilmenite, chromite, plus some polymineralic lithic clasts, within a fine grained, partly vesicular matrix of the same minerals with minor kamacite, taenite, troilite, pentlandite, calcite and barite.

 

Geochemistry: Olivine (Fa5.6-54.0, FeO/MnO = 77-109, N = 3), orthopyroxene (Fs24.4-46.0Wo4.6-3.4, FeO/MnO = 56-67, N = 3), pigeonite (Fs49.5Wo19.7, FeO/MnO = 58), augite (Fs22.2Wo40.7, FeO/MnO = 64), plagioclase (An92.7-97.8Or0.5-0.2, N = 2).

 

Classification: Lunar (feldspathic breccia).

 

Specimens: 20.2 g in the form of a polished slice at UWB; remainder with Mr. R. Falls.

 

from The Meteoritical Bulletin, No. 106

Northwest Africa 11407

Algeria
Purchase: 2017
Mass: 700 g

Lunar meteorite (feldspathic breccia)

History: Some pieces totaling 700 g were found in Algeria. 207 g were purchased by Decker Meteorite-Museum in 2017 from a Moroccan dealer.

Petrography (A.-K. Kraemer and A. Bischoff, IfP) Breccia composed of angular anorthite-rich lithic and mineral fragments embedded in a fine-grained clastic matrix. The sample also contains shock-melted areas. Observed minerals include anorthite, olivine, low-Ca pyroxene, Ca-rich pyroxene, silica polymorph, Al-Ti-chromite, kamacite, ilmenite, troilite, and pendlandite. Some Ba-sulfates indicate terrestrial alteration.

Geochemistry: Mineral compositions and geochemistry: Olivine (mean: Fa28.8, Fe/Mn = 93; N = 49), low-Ca pyroxene (mean Fs25.8Wo7.6, Fe/Mn = 59, N = 30), Ca-rich pyroxene (mean: Fs17.0Wo39.4; Fe/Mn = 58; N = 12), anorthite (mean An96.0Or0.1, N = 25).

Classification: Lunar (feldspathic breccia).

Specimens: 20.7 g including one polished thin section, IfP; 207 g with Decker Meteorite-Museum.

 

from The Meteoritical Bulletin, No. 106

Northwest Africa 11421

(Northwestern Africa)
Purchase: 2017
Mass: 912 g

Lunar meteorite (feldspathic breccia)

History: The meteorite was bought in 2017 from a meteorite dealer in Erfoud, Morocco.

Physical characteristics: Many small grayish individuals lacking any fusion crust. White to beige clasts in greyish matrix are visible at the surface.

Petrography (A. Greshake, MNB) The meteorite is a breccia composed of angular to subrounded whitish clasts up to 1 cm in size set into a greyish vitreous groundmass. Mineral fragments are also present in the matrix. Dominant mineral phases are low-Ca pyroxene, Ca- pyroxene, olivine and calcic plagioclase. Minor phases include chromite, ilmenite, fayalite, pyrrhotite, FeNi metal, and barite. Contains some melt regions displaying quenching textures of dendritic pyroxene and plagioclase.

Geochemistry: olivine: Fa30.1±10.4 (Fa18.4-52, n=16, FeO/MnO=79-112); low-Ca pyroxene: Fs33.3±2.8Wo2.5±1.0 (Fs30.4-36.4Wo1.4-3.8, n=10, FeO/MnO=55-64); Ca-pyroxene: Fs16.1±4.0Wo40.0±4.2 (Fs8.9-23.2Wo31.3-45.1, n=14, FeO/MnO=36-64); calcic plagioclase: An96.4±0.8 (An95.4-98.0, n=16).

Classification: Lunar (feldspathic breccia).

Specimens: 21.4 g MNB. Main mass: Tomasz Jakubowski and Marcin Cimala.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11428

 

(Northwestern Africa)

Purchased: August 2017

Mass: 783.39 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Purchased by Bob Falls in July 2017 from dealer in Zagora, Morocco.

 

Physical characteristics: The stones lack fusion crust but are thinly coated by reddish-brown weathering products. The fresh interiors exhibit white to beige, angular clasts in a medium gray matrix.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of anorthite, exsolved pigeonite, olivine, ilmenite, Ti-chromite, troilite and kamacite in a finer matrix containing sporadic small vesicles.

 

Geochemistry: Olivine (Fa18.8-56.2, FeO/MnO = 87-96, N = 3), pigeonite (Fs37.8Wo7.6, FeO/MnO = 54), augite (Fs7.5Wo44.2, FeO/MnO = 29), augite host (Fs24.2Wo40.7, FeO/MnO = 66), low-Ca pyroxene exsolution lamella (Fs51.0Wo­, FeO/MnO = 65), plagioclase (An97.1-97.2Or0.2, N = 2).

 

Classification: Lunar (feldspathic breccia).

 

Specimens: 20.71 g including one polished endcut at UWB; remainder with Mr. B. Falls.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11444

 

Mauritania

Find: 2017

Mass: 1323 g

 

Lunar, melt breccia

 

History: Sample was collected at an unknown locality, with hearsay evidence suggesting that this was somewhere in Mauritania. The sample material was purchased by Graham Ensor from Ali El Wali. A large number of fragments collected in the same area. Some fragments were found on the surface, which have a dark, pitted surface colouration due to desert weathering. Other pieces were recovered from within the soil layer and are lighter in color with patches of reddish soil and relatively unpitted.

 

Physical characteristics: The sample comprises approximately 200 pieces, with a total mass of 1323 g. Some of these pieces have a dark appearance, possibly the result of wind abrasion. Fragments with a lighter-colored outer surface are also present and these often have variable amounts of adhering sand. It is presumed that these were at least partially buried at the time of recovery. In hand specimen, all the pieces display prominent angular to sub-rounded, feldspar-rich, clasts, up to 1.5 cm in diameter, enclosed in a dark matrix, laden with smaller, angular fragments.

 

Petrography: (R. Greenwood, OU): The sample is a complex breccia, containing a wide variety of fragments and variable amounts of flow-banded glass. Fragments are generally angular and include coarse-grained to aphanitic gabbros and basalts and a wide range of single-crystal types. There are many examples of clasts consisting of brown, devitrified basaltic glass with acicular plagioclase microlites. Angular, crystal fragments can be up to 0.5 mm in diameter and consist predominantly of plagioclase, pyroxene (often displaying well-developed exsolution lamellae), and olivine. Both high and low Ca pyroxenes are present in the gabbroic clasts, with both often showing prominent exsolution lamellae. The specimen contains a few percent of anhedral Fe,Ni metal grains (kamacite), up to 150 μm in diameter. The glass is often highly vesicular, flow-banded and contains a diverse range of crystals and lithic fragments.

 

Geochemistry: Mineral compositions and geochemistry: Pyroxenes show wide compositional variation, with both high and low Ca varieties present. Average composition: Fs35.1±11.4Wo16.1±14.2 (N=15, range Fs30Wo­ to Fs18Wo42). Olivine, average composition: Fa37.1±16.9 (N = 21, range Fa7-67). Well-developed exsolution lamallae are commonly present. Plagioclase shows limited compositional variation: An96.5±0.5 (N=11). Fe, Ni Metal grains (up to 150 microns in diameter) are kamacite (7 to 8 wt.% Ni) (N = 6). All mineral compositions determined by EDS analysis. Oxygen isotopes: δ17O 3.28 per mil; δ18O 6.28 per mil; Δ17O 0.01 per mil (using standard formula: Δ17O = δ17O - 0.52 δ18O) (Analysis is consistent with the oxygen isotopic composition of other lunar meteorites).

 

Classification: Lunar, melt breccia. Moderate weathering.

 

Specimens: 44.82 g at OU; main mass with Graham Ensor.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11457

 

Algeria

Found: 2016

Mass: 273 g

 

Lunar meteorite (feldspathic breccia)

 

History: Seven pieces with a total mass of 273 g were purchased form a Moroccan dealer in Ouazazate, Morocco May 2016. The sample may have been found in Algeria and brought by nomads to a dealer in Zwirate in the north of Mauritania.

 

Physical characteristics: The susceptibility values (J. Gattacceca, CEREGE) for the four largest samples are as follows: log χ (× 10-9 m3/kg) = 3.31 (117.7g sample); log χ (× 10-9 m3/kg) = 3.56 (88.64 g sample); log χ (× 10-9 m3/kg) = 3.25 (39.91 g sample); log χ (× 10-9 m3/kg) = 3.25 (15.34 g sample).

 

Petrography: (A.-K. Kraemer and A. Bischoff, IfP) Breccia composed of angular anorthite-rich lithic and mineral fragments embedded in a fine-grained clastic matrix. Observed minerals include anorthite, olivine, low-Ca pyroxene, Ca-rich pyroxene, silica polymorph, Al-Ti-chromite, kamacite, ilmenite, troilite, pendlandite and schreibersite. Calcite veins indicate moderate degree of weathering.

 

Geochemistry: Mineral compositions and geochemistry: Olivine (mean: Fa48.2, Fe/Mn = 101; N = 199), low-Ca pyroxene (mean Fs35.4Wo12.4, Fe/Mn = 62, 22,9 N = 199), Ca-rich pyroxene (mean: Fs30.7Wo35.2; Fe/Mn = 69; N = 73), anorthite (mean An92.7Or0.3, N = 201).

 

Classification: Lunar (feldspathic breccia).

 

Specimens: 22.9 g and thin sections. Main mass with Ben Hoefnagels.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11460

 

(northwestern Africa)

Purchased: 2017

Mass: 286 g

 

Lunar meteorite

 

History: The meteorite was bought from a Moroccan meteorite dealer at the meteorite fair in Ensisheim, France.

 

Physical characteristics: Several small, grayish individuals without fusion crust but adhering reddish Sahara sand.

 

Petrography: (A. Greshake, MNB): The meteorite is a polymict breccia composed of lithic and mineral clasts consolidated in a mostly molten and recrystallized matrix. The up to 1 cm sized lithic clasts are dominantly basaltic and gabbroic, mineral clasts include up to 200 μm sized olivine, exsolved pyroxene, and feldspar grains. Accessories are Ti-chromite, ilmenite, FeNi metal, fayalite, and barite.

 

Geochemistry: olivine: Fa31.6±9.7 (Fa17.9-55.7, n=26, FeO/MnO=66-112); low-Ca pyroxene: Fs29.2±11.7Wo4.0±1.1 (Fs14.1-50.8Wo2.8-6.5, n=14, FeO/MnO=47-65); Ca-pyroxene: Fs25.1±9.6Wo34.1±7.4 (Fs12.7-44.4Wo23.1-42.6, n=17, FeO/MnO=34-67); calcic plagioclase: An96.7±0.8 (An94.6-97.8, n=15)

 

Classification: Lunar (feldspathic breccia)

 

Specimens: 21 g at MNB; main mass with Philippe Schmitt-Kopplin.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11474

 

(northwestern Africa)

Purchased: 2017 May

Mass: 586 g

 

Lunar meteorite

 

History: Purchased by Dustin Dickens and Mendy Ouzillou from a Mauritanian meteorite dealer May 10, 2017.

 

Physical characteristics: Many identical appearing pieces, no fusion crust. A saw cut reveals a fragmental breccia with numerous white feldspathic clasts set in a dark-gray ground mass.

 

Petrography: (C. Agee, UNM) This meteorite consists of primarily feldspathic clasts and shock melt with lesser amounts of fragmental pyroxene and olivine.

 

Geochemistry: (C. Agee and B. Ha, UNM) olivine Fa19.3±0.6, Fe/Mn=86±1, n=2; pigeonite Fs24.8±0.5Wo4.3±0.3, Fe/Mn=60±9, n=2; high Ca pyroxene Fs27.4Wo34.4, Fe/Mn=58, n=1; plagioclase An97.8±0.7Ab2.0±0.6Or0.2±0.1, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.4±0.8, TiO2=0.21±0.01, Al2O3=27.5±1.1, Cr2O3=0.07±0.02, MgO=5.7±1.4, FeO=4.2±1.3, MnO=0.07±0.02, CaO=16.2±0.5, Na2O=0.42±0.04, K2O=0.01±0.02 (all wt%), Fe/Mn=63±1, Mg#=70.1±1.1, n=3.

 

Classification: Lunar feldspathic breccia

 

Specimens: 20 g including a probe mount on deposit at UNM, Dustin Dickens and Mendy Ouzillou hold the main mass.

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11515

 

(northwestern Africa)

Purchased: 2017

Mass: 330 g

 

Lunar meteorite (feldspathic breccia)

 

History: The fragments were bought from a local meteorite dealer in Morocco.

 

Physical characteristics: Several greyish fragments lacking any fusion crust and partly covered by reddish Sahara sand.

 

Petrography: (A. Greshake, MNB): Feldspathic breccia consisting of lithic and mineral clasts set into a partly glassy or recrystallized matrix often showing flow structures. Lithic clasts include up to 1.2 mm sized angular to subrounded basaltic, noritic, and gabbroic types; mineral clasts are feldspar, olivine, and exsolved pyroxenes. Minor phases are Ti-chromite, ilmenite, troilite, FeNi metal, metallic iron and fayalite. Some cracks are filled with calcite due to terrestrial weathering.

 

Geochemistry: olivine: Fa33.6±12.5 (Fa19.2-54.1, n=16, FeO/MnO=72-119); low-Ca pyroxene: Fs43.3±4.8Wo4.5±1.3 (Fs31.2-48.8Wo3.0-7.7, n=17, FeO/MnO=53-67); Ca-pyroxene: Fs24.4±3.1Wo31.9±9.3 (Fs12.7-44.4Wo20.3-27.5, n=10, FeO/MnO=52-76); calcic plagioclase: An96.2±1.1 (An92.8-97.5, n=15).

 

Classification: Lunar (feldspathic breccia)

 

Specimens: 20 g at MNB. Main mass with Martin Goff.

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11517

 

(northwestern Africa)

Purchased: 2017

Mass: 88 g

 

Lunar meteorite (feldspathic breccia)

 

History: Four individuals weighing a total of 88 g were found near Tindouf, Algeria. John Sinclair purchased the stones from a Moroccan meteorite hunter at the Sainte Marie Aux Mines mineral show in France during June of 2017.

 

Physical characteristics: Sample is irregular-ovoid shaped and lacks fusion crust. The exterior surface is weathered and light orangish-gray in color. The stone shows brecciated texture composed of dominant light-colored clasts in a dark grey matrix. FeNi grains are present in several slices. Pits from weathering of clasts and vesicles contain orange caliche.

 

Petrography: Description and classification (A. Love, App) Sample is a polymict breccia composed of 0.5-3 mm irregularly shaped lithic and mineral clasts set within a micro-vesiclar, melt matrix. Clasts are composed of poikilitic gabbro, vitrophyric, anorthosite, crystalline impact melt, and basaltic lithologies. Minerals clasts include olivine, exsolved Ca-rich and Ca-poor pyroxene, baddeleyite, ulvospinel, ilmenite, chromite, FeS, kamacite, taenite, Si-polymorph.

 

Geochemistry: (A. Love, App) Olivine (Fa18.65-53.01, FeO/MnO=83.29-109.49, N=12), Opx (Fs16.43-42.54 Wo2.92-4.47, FeO/MnO=53.16-60.73, N=5), pigeonite (Fs40.64-67.00 Wo5.14-11.16, FeO/MnO=54.93-67.00, N=8); augite (Fs17.44-36.61 Wo­, N=8); pyroxeferroite Fs70.28 Wo5.8, FeO/MnO=60.5, N=1); plagioclase An95.55-98.72 Or0.00-0.27, N=15).

 

Classification: Lunar (feldspathic breccia). Textures and mineral compositions indicate this sample is a feldspathic breccia. FeO/MnO ratios from olivine and pyroxene and An-content of plagioclase suggest this sample is a lunar feldspathic breccia.

 

Specimens: J. Sinclair holds the main masses. An individual and a slice weighing 17.6 g and one polished thin section are on deposit at App.

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11695

 

(northwestern Africa)

Purchased: 2017

Mass: 350 g

 

Lunar meteorite (feldspathic breccia)

 

History: Purchased from a Moroccan meteorite dealer in 2017. Reportedly found by nomads in Algeria, March 2017.

 

Physical characteristics: Many identical appearing pieces. Weathered exterior, no fusion crust, saw cut reveals a fragmental breccia with numerous white feldspathic clasts set in a dark-gray ground mass.

 

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows primarily feldspathic clasts and shock melt with lesser amounts of fragmental pyroxene and olivine. Z. Kerensky made 6 thin sections and also identified minor amounts of troilite and Fe-metal.

 

Geochemistry: (C. Agee, UNM) Olivine Fa35.7±10.2, Mn/Fe=90±8, n=15; pigeonite Fs30.0±6.8Wo10.1±7.6, Mn/Fe=56±6, n=9; augite Fs26.7±15.3Wo37.0±7.7, Mn/Fe=54±11, n=7; plagioclase An96.5±0.5, n=7; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.5±0.1, TiO2=0.19±0.01, Al2O3=28.9±0.1, Cr2O3=0.11±0.01, MgO=6.2±0.0, FeO=4.1±0.1, MnO=0.06±0.00, CaO=16.0±0.1, Na2O=0.34±0.01, K2O=0.02±0.00, n=3 (all wt%).

 

Classification: Lunar, feldspathic breccia.

 

Specimens: 20.85 g on deposit at CSFK, probe mount at UNM, Zsolt Kereszty holds the main mass.

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11783

 

(northwestern Africa)

Purchased: 20 September 2014

Mass: 65 g

 

Lunar meteorite (feldspathic breccia)

 

History: Purchased by Jay Piatek from a Moroccan meteorite dealer.

 

Physical characteristics: Several visually identical appearing pieces. No fusion crust. A saw cut reveals a fragmental breccia with white feldspathic clasts set in a dark gray ground mass.

 

Petrography: (C. Agee, UNM) This meteorite is a breccia of fragmental pyroxene, olivine, plagioclase grains. There are many domains that are fine-grained and cataclastic with shock melt and vesicles. Fe-metal, chromite, ilmenite, silica, and a phosphate mineral were detected.

 

Geochemistry: (C. Agee, UNM) olivine Fa: 28.1±4.8, Fe/Mn=100±2, n=4; clinopyroxene Fs19.0±4.4Wo23.1±17.6, Fe/Mn=52±8, n=3; plagioclase An94.6±1.3, n=3; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=46.0±0.4, TiO2=0.51±0.02, Al2O3=28.0±0.5, Cr2O3=0.11±0.01, MgO=6.0±0.2, FeO=4.7±0.2, MnO=0.07±0.00, CaO=15.3±0.1, Na2O=0.61±0.03, K2O=0.16±0.01 (all wt%), n=7.

 

Classification: Lunar feldspathic breccia.

 

Specimens: 13 g including a probe mount on deposit at UNM, Jay Piatek holds the main mass.

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11787

 

Mauritania

Purchased: 2017

Mass: 23.5 kg

 

Lunar meteorite (feldspathic breccia)

 

History: Purchased in Mauritania by Dustin Dickens from anonymous meteorite hunter.

 

Physical characteristics: Many visually identical appearing pieces, ranging from several kilograms to sub-gram fragments. Some pieces show a light-gray, remnant fusion crust on one or more faces, with most having no fusion crust. Saw cut reveals a fragmental breccia with white feldspathic clasts set in a dark-gray ground mass.

 

Petrography: (C. Agee, UNM) Many visually identical appearing pieces, ranging from several kilograms to sub-gram fragments. Some pieces show a light-gray, remnant fusion crust on one or more faces, with most having no fusion crust. Saw cut reveals a fragmental breccia with white feldspathic clasts set in a dark-gray ground mass.

 

Petrography: (C. Agee, UNM) his meteorite is a polymict breccia of fragmental feldspathic, troctolitic and mafic lithologies, as well as fragmental pyroxene, olivine, plagioclase grains, and shock melt with vesicles.

 

Geochemistry: (C. Agee, UNM) olivine Fa: 25.6±8.9, Fe/Mn=95±18, n=13; low-Ca pyroxene Fs26.2±8.8Wo6.2±2.5, Fe/Mn=52±4, n=7; subcalcic augite Fs35.9±5.8Wo26.9±7.9, Fe/Mn=69±5, n=2; augite Fs14.5±7.1Wo41.0±2.0, Fe/Mn=45±15, n=3; plagioclase An96.2±0.8, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=42.9±0.4, TiO2=0.11±0.05, Al2O3=31.1±4.0, Cr2O3=0.10±0.05, MgO=5.1±3.3, FeO=3.3±2.0, MnO=0.05±0.05, CaO=16.6±1.6, Na2O=0.37±0.06, K2O=0.04±0.00 (all wt%), n=3.

 

Classification: Lunar feldspathic breccia

 

Specimens: 21.25 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

 

Randy Says…

Compositionally, it's a typical feldspathic lunar meteorite.

The NWA 8046 clan, alias “Algerian Megafind,” is the largest known lunar meteorite, but there are many, many pieces of it. The mass of the 16 named pairs that I’ve analyzed is 28.3kg. I suspect that at least 15 other stones that I have not analyzed are paired with the NWA 8046 clan on basis of the MetBull descriptions and photographs. Adding these, the mass increases to 52.2 kg. Also, I know that a lot of this stuff is being sold without being classified. Note that many of the stones are reported to come from Tindouf, Algeria, but others are said to come from Mauritania. The Mauritanian border is 33 km southwest of Tindouf.

Below: Data for subsamples of 19 NWA 8046 stones. The meteorites are compositionally heterogeneous. The FeO-rich subsamples (about 30 mg each) contain clasts of mare basalt or glass (typically, 18-22% FeO). The Th-“rich” (>0.3 ppm) subsamples must contain some KREEP bearing lithologies. The low average concentrations of FeO and Th require an origin of the meteorite in the Feldspathic Highlands Terrane of the Moon but the presence of both basaltic and KREEPic material in quantitatively minor proportions suggest a nearside origin. The extremely-white anorthosite clast in the photo of NWA 10901 above would have <0.5 % FeO and a near-zero concentration of Th. None of the subsamples are dominated by anorthosite clasts.

 

 

More Information

Meteoritical Bulletin Database

NWA 2425 | 8046 | 10309 | 10461 | 10609 | 10643 | 10649 | 10758 | 10822 | 10901 | 11029 | 11228 | 11266 | 11269 | 11273 | 11303 | 11331 | 11367 | 11379 | 11428 | 11407 | 11421 | 11444 | 11457 | 11460 | 11474 | 11515 | 11532 | 11695 | 11783 | 11787 |

References

 

Korotev R. L. and Irving A. J. (2014) Keeping up with the lunar meteorites — 2014 (abstract). 45th Lunar and Planetary Science Conference, abstract no. 1405.

 

Korotev R. L. and Irving A. J. (2016) Not quite keeping up with the lunar meteorites – 2016. 47th Lunar and Planetary Science Conference, abstract no. 1358.

 

Korotev R. L. and Irving A. J. (2017) Still not keeping up with the lunar meteorites – 2017. 48th Lunar and Planetary Science Conference, abstract no. 1498.

Treiman A. H. & Coleff D. M. (2018)) Lunar meteorite Northwest Africa (NWA) 11421: X-ray tomography and preliminary petrology. 81st Annual Meeting of the Meteoritical Society, abstract no. 6329.

 

 

Back to: Lunar Meteorites | List of Lunar Meteorites | Top of Page

 

 

Prepared by: Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don’t contact me about the meteorite you think that
you’ve found until you read this and this.

 

e-mailkorotev@wustl.edu

Last revised: 5 June 2018