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NWA 2965, Enstatite EL6/7 Chondrite, Uncut Frag, 4.5g

$25.00

NWA 2965 meteorites were first recovered out of the Saharan Desert of Algeria in 2004. Samples were analyzed and classified as a EL6/7 chondrite. This odd petrologic type is still under review and debate as to which exact type this meteorite belongs to. It is a highly-weathered meteorite with a long terrestrial age that has undergone varying degrees of oxidation. It is enstatite rich and may originate from a different parent body than other similar meteorites. The specimen being offered here is an uncut fragment that is presented "as-found" in the desert - it has only received a light cleaning with a soft brush to remove loose sand and dust particles. It weighs approx. 5.5 grams.

Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing the specimen shown. Your purchase will include a labeled gemjar for safe storage.

From the Meteoritical Bulletin entry on NWA 2965 :

Northwest Africa 2965

Algeria

Find: August 2004

Enstatite chondrite (EL6/7)

History and physical characteristics: Hundreds of fragments that weigh >100 kg were collected in the Algerian desert in 2004. Small fragments (~100 g) are commonly weathered to a dark brown with very dark weathering veins. Large pieces may retain portions of weathered fusion crust with only moderate to lightly weathered interiors.

Petrography: (T. Bunch and J. Wittke, NAU) A completely recrystallized enstatite chondrite with polygonal to irregular grain outlines. The grain size varies from 0.02 to 0.7 mm. Round, curved, blocky objects contain coarser-grained orthopyroxene than in the matrix. No relict chondrules were observed in ~32 cm2 that were analyzed. Metal, daubreelite, and tiny, vermicular grains of graphite are also present and constitute <3 vol%.

Mineral compositions: Orthopyroxene (Fs98.4±0.02 [sic]), plagioclase (An17.8Or4.4), troilite with Ti = 0.91, Cr = 1.10, Zn = 0.6 (all wt%).

Classification: Enstatite chondrite (EL6/7); minimal shock, variable weathering (W2–W5). It has absolutely no evidence of chondrules.