For Sale IconNWA 8037 Type 3.4 Metal-Poor Ordinary Chondrite Meteorites for Sale

Location: Northwest Africa, location unknown. Purchased in 2013.

Found: 2013.

Classification: Type 3.4 metal-poor chondrite (S2, W1/2).

Description: History: Purchased by Eric Twelker in February 2013 from a Moroccan dealer at the Tucson Gem and Mineral Show.
Petrography: (A. Irving and S. Kuehner, UWS) Relatively fresh specimen composed of very closely-packed, well-formed, medium-sized (0.4-2.1 mm) chondrules in a sparse black matrix with very low metal content. Olivine, orthopyroxene, pigeonite, diopside, sodic plagioclase, altered kamacite, taenite, troilite and rare chromite.
Geochemistry: Olivine (Fa0.5-94.8; Cr2O3 in ferroan olivine 0.09-0.22 wt.%, mean 0.12±0.05 wt.%, N = 8), orthopyroxene (Fs0.8-22.4Wo0.5-3.2), pigeonite (Fs22.9Wo10.7), diopside (Fs2.4Wo39.3). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave (all in per mil): δ17O = 2.700, 2.988, 2.873; δ18O = 3.800, 4.255, 4.097; Δ17O = 0.694, 0.741, 0.710 (for a TFL slope of 0.528 per mil).
Classification: Ordinary chondrite (Type 3). The low metal content and freshness of this unequilibrated chondrite specimen are at odds with its oxygen isotopic composition, which plots on the trend for H chondrites. Estimation of subtype based on histograms of Cr2O3 distribution in ferroan olivine given in Fig. 4 of Grossman and Brearley (2005).

O isotopes:

Comment: Recent classificaitons have revealed a number of unequilbrated chondrites with low metal and istopes at odds with the olivine analysis. Querry -- could there be more than three types of "ordinary" chondrite?

Link to Meteoritical Bulletin Database.

# NWA8037-2-9 # NWA8037-3-3 # NWA8037-4-5 # NWA8037-4-51 About Scale:  Each photo has a small one centimeter cube.  That's a little less than a half inch on a side.  The coin above is a US dime.
Weight: 2.9 gm Weight: 3.3 gm Weight: 4.5 gm Weight: 4.5 gm
Features: Part Slice Features: Part Slice Features: Part Slice Features: Part Slice
Price: sold Price: $38 Price: $50 Price: $50

# NWA8037-4-8 # NWA8037-5-5 # NWA8037-5-9 # NWA8037-6-4 # NWA8037-8-1
Weight: 4.8 gm Weight: 5.5 gm Weight: 5.9 gm Weight: 6.4 gm Weight: 8.1 gm
Features: Part Slice Features: Part Slice Features: Part Slice Features: Part Slice Features: Part Slice
Price: $53 Price: $60 Price: sold Price: sold Price: sold

# NWA8037-16-4 # NWA8037-34-7 # NWA8037-45-4 # NWA8037-54-8 # NWA8037-81-8
Weight: 16.4 gm Weight: 34.7 gm Weight: 45.4 gm Weight: 54.8 gm Weight: 81.8 gm
Features: Slice Features: Slice Features: Slice Features: Slice Features: Slice
Price: sold Price: $352 Price: $459 Price: $553 Price: $823

# NWA8037-93-2
Weight: 93.2 gm
Features: Slice
Price: $937