Meteorite**Erg Atouila 001, Ung. achon. (albitite)**0.668 gram slice, NEW FIND!!

Description

Hello up for sale is Erg Atouila 001 classified as a Ultra  Rare Ungrouped achondrite (albitite). This gorgeous and unique slice weighs 0.668 grams with a nice polish to one side, Exterior is dominated by a pink to light orange color with some dark gray patches with oxidation halos, and some small green patches are scattered throughout. No fusion crust is present. Several dark-colored shock melt veinlets are visible. Microprobe examination and an SEM survey show that albitic alkali feldspar makes up 95% of the modal abundance of this meteorite. Clinopyroxene makes up approximately 3% of the mode, phases with less than 1% modal abundance include olivine, K-feldspar, fluorapatite, troilite, Fe-metal, ilmenite, and oxidized iron. Small poikiolitic inclusions of olivine and lamellae of K-spar are ubiquitous within the host albite. Clinopyroxene occurs primarily in centimeter-sized nodules along with olivine inclusions and other minor phases. This meteorite comes with 2 COA cards Streaming Meteorites and Mark Lyon and display case. Thanks for your interest and take care.
Retail price: 0-500 per gram
THIS IS A NEW FIND 2020 FROM MALI AND EXTREMELY RARE AND UNIQUE UNGROUPED ACHONDRITE (ALBITITE). THERE IS A VERY LIMITED AMOUNT OF THIS MATERIAL AVAILABLE FOR SALE, GOOD LUCK BIDDING!!!!
Erg Atouila 001
Basic informationName: Erg Atouila 001
This is an OFFICIAL meteorite name.
Abbreviation: EA 001
Observed fall: No
Year found: 2020
Country: Mali
Mass: 793 g
Erg Atouila 001 (EA 001)        22.489944, -4.551744
Gao, Mali
Find: 2020
Classification: Ungrouped achondrite
History: The first piece of 553 g was found by a nomad in August 2020. A second piece of 240 g was found less than a km from the first piece location in September 2020. Both pieces were purchased by Mohamed Aid.
Physical characteristics: Two similar appearing pieces, 553 and 240 g. Exterior is dominated by a pink to light orange color with some dark gray patches with oxidation halos, and some small green patches are scattered throughout. No fusion crust is present. Several dark-colored shock melt veinlets are visible.
Petrography: (M. Spilde, A. Ross, C. Agee, UNM) Microprobe examination and an SEM survey show that albitic alkali feldspar makes up 95% of the modal abundance of this meteorite. Clinopyroxene makes up approximately 3% of the mode, phases with less than 1% modal abundance include olivine, K-feldspar, fluorapatite, troilite, Fe-metal, ilmenite, and oxidized iron. Small poikiolitic inclusions of olivine and lamellae of K-spar are ubiquitous within the host albite. Clinopyroxene occurs primarily in centimeter-sized nodules along with olivine inclusions and other minor phases.
Classification: Ungrouped achondrite (albitite). This meteorite is an albitite with one of the highest modal feldspar contents ever reported in a meteorite – comparable modal abundance to lunar anorthosite meteorites, however its feldspar is an alkali feldspar solid solution. This albitite meteorite is also unlike other Na-feldspar-rich ungrouped achondrites such as GRA 06128/06129 (Shearer et al., 2008) and Almahata Sitta ALMA-A (Bischoff et al., 2014) which have feldspar as plagioclase solid solutions. When plotted on a total alkali-silica (TAS) diagram the bulk composition of this meteorite falls within the trachyte field. Given the relatively coarse grain size present, syenite or olivine syenite are alternative igneous rock names for this meteorite. The oxygen isotope values plot near the acapulcoite-lodranite field although there is no obvious petrologic link between this meteorite and acapulcoites/lodranites.
Specimens: 20.5 g on deposit at UNM, Mohamed Aid holds the main mass.
Bibliography:
Bischoff A., Horstmann M., Barrat J.-A., Chaussidon M., Pack A., Herwartz D., Ward D., Vollmer C. and Decker S. (2014) Trachyandesitic volcanism in the early Solar System. Proceedings of the National Academy of Sciences 111, 12689–12692. (link)
Shearer C. K., Burger P. V., Neal C. R., Sharp Z., Borg L. E., Spivak-Birndorf L., Wadhwa M., Papike J. J., Karner J. M., Gaffney A. M., Shafer J., Weiss B. P., Geissman J. and Fernandes V. A. (2008) A unique glimpse into asteroidal melting processes in the early solar system from the Graves Nunatak 06128/06129 achondrites. American Mineralogist 93, 1937–1940. (link)
Data from:
MB110
Table 0
Line 0:
State/Prov/County:Gao
Place of purchase:Mali
Date:2020
Latitude:22.489944
Longitude:-4.551744
Mass (g):793
Pieces:2
Class:Achondrite-ung
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):29.3±0.8
Ferrosilite (mol%):10.0±0.6
Wollastonite (mol%):44.0±0.4
Classifier:C. Agee, UNM
Type spec mass (g):20.5
Type spec location:UNM
Main mass:Mohamed Aid
Comments:Fieldname AID-235; submitted by C. Agee