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Adrar 003 meteorite, Adrar Province, Algeria

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Latitude & Longitude (WGS84): 27° 7' 59'' North , 0° 12' 0'' East
Latitude & Longitude (decimal): 27.13333,0.20000
Other regions containing this locality:Northwest Africa Meteorites
Sahara Desert, North Africa
Non-native locality type:Meteorite
Meteorite Type:L/LL3.10 chondrite meteorite
Köppen climate type:BWh : Hot deserts climate


Ordinary chondrite, unequilibrated (L/LL3.10; S2; W2)
Find, 1990; 287 g

The small, somewhat weathered Adrar 003 stone is one of the least equilibrated of meteorites. Well-defined and abundant chondrules [3mm to < 50 µm], usually porphyritic and dominated by olivine and/or pyroxene (PO,POP,PP), are set in an opaque matrix. Smaller aggregates of Fe-Ni metal and sulfides (up to 500 µm) are also present with rims that often abut the matrix. Both olivine (Fo69-93) and pyroxene (En95-76) are quite variable. Plagioclase is usually anorthitic. Small high-temperature spinel-rich inclusions are present — a few with pre-solar nanodiamonds and silicon carbide grains. Two silicon nitrides are present and unusually high bulk deuterium ratios and very unusual nitrogen isotopes in diamonds indicate a complex and unusual history. The small and somewhat weathered opaques have not been well characterized in much of the published literature.


Precise classification of chondrites as type 3.10 is somewhat new. Only petrologic types 3.0 and 3.05 are considered more primitive (less metamorphosed). Adrar 003 is the only meteorite currently listed as 'L/LL3.10'. However, as of August 2015 over 10 meteorites had been classified as either H3.10, L3.10, L/LL3.10, or LL3.10.

Mineral List


9 valid minerals.

Meteorite/Rock Types Recorded

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References

Wlotzka, F. (1991). Meteoritical Bulletin, No. 71. Meteoritics 26(3): 255-262. (June 1991).

Hutchison, R., Reed, S.J.B., Ash, R.D. & Pillinger, C.T. (1991) Adrar 003: A new extraordinary unequilibrated ordinary chondrite. Meteoritics 26 (4): p. 349. (Dec 1991).

Russell, S. S., Arden, J.W. & Pillinger, C.T. (1992) Adrar 003: an Unequilibrated Ordinary Chondrite Rich in Pristine Interstellar Grains. (Mar 1992).

Lee, M.R., Russell, S.S., Arden, J.W., & Pillinger, C.T. (1995) Nierite (Si3N4), a new mineral from ordinary and enstatite chondrites. Meteoritics 30 (4): 387-397. (July 1995).

Russell, S.S., Arden, J.W. & Pillinger, C.T. (1996) A carbon and nitrogen isotope study of diamond from primitive chondrites: Meteoritics & Planetary Science 31(3):343-355. (May 1996).

Scherer, P., Herrmann, S., & Schultz, L. (1998) Noble Gases in 21 Saharan LL-chondrites: Exposure ages and possible pairings. Meteoritics & Planetary Science 33(2): 259-265. (March 1998).

Brearley, A.J. & Jones, R.H. (1998) Chondritic Meteorites. In: Planetary Materials (Papike, JJ - Ed.), Chapter 3: 1-398: Mineralogical Society of America, Washington, DC, USA.

Bridges, J.C., Franchi, I.A., Sexton, A.S. & Pillinger, C.T. (1999) Mineralogical controls on the oxygen isotopic compositions of UOCs (1999) Geochimica et Cosmochimica Acta 63(6): 945-951. (July 1999).

Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.

Lauretta, D. S. & McSween Jr., H.Y., Editors (2006). Meteorites and the Early Solar System II. University of Arizona Press: Tucson, Arizona. 943 pages.

Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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