NWA 7875 – H7

Meteorites For Sale.

100% Authentic Meteorite Specimens For Collection & Study

email me at mendy.ouzillou AT gmail.com

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New H7 Ordinary Chondrite: NWA 7875 a visually striking meteorite strewn with metal blebs (TKW = 476g)

Physical characteristics: Single stone, dark-brown exterior, saw cuts reveal many sub-millimeter metal blebs, but a few up to 3 mm, set in a fine-grained, dark-brown, crystalline matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a recrystallized chondritic texture though lacking chondrules. Plagioclase up to 200 μm, numerous texturally equilibrated metal domains 300-500 μm, ~50% of metal is oxidized, oxide veinlets throughout.

Geochemistry: (C. Agee and L. Burkemper, UNM) Fa19.2±0.1, Fe/Mn=39±1, n=5; low-Ca pyroxene Fs16.5±0.3Wo4.2±0.8, Fe/Mn=24±1, n=6; high-Ca pyroxene Fs9.2±0.2Wo37.4±1.0, Cr2O3=1.32 wt%, Fe/Mn=19±1, n=2; plagioclase Ab70An27Or2.

Classification: Ordinary chondrite (H7), type 7 based on high Wo-content in orthopyroxene and absence of chondrules, weathering grade W2.

Notes from Dr. Carl Agee: NWA 7875 is not an impact melt breccia. There are NO quench melt or glass domains, only textually equilibrated silicates and metal — no chondrules. The metal observed in SEM is not perfectly spherical as in IMB, instead they are segregated metal domains, probably formed through metamorphic heating. The high Wo content and lack of chondrules makes this a type 7.

SEM Images:

NWA7875-SEM2     NWA7875-SEM1

Oxygen Isotope Analysis:

NWA7875-Oxygen-Isotopes

Slices for Sale at $20/g: (all slices expertly cut &  prepared my Marlin Cilz)- MORE SLICES AND MICROS are available – Just ASK.

Click on images below to view the full size image.

Full Slice #1: 15.2g, 84.5 x 36.3 x 2.1mm – SOLD

NWA7875-1f     NWA7875-1b

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Full Slice #2: 19.3g, 83.1mm x 38.7 x 2.6mm

NWA7875-2f     NWA7875-2b

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Full Slice #3: 15.1g, 77.3 x 28.7 x 2.9mm

NWA7875-3f     NWA7875-3b

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Full Slice #4: 12.6g, 71.2 x 30.0 x 2.7mm

NWA7875-4f     NWA7875-4b

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Full Slice #5: 10.4g, 61.2 x 30.3 x 2.15mm – SOLD

NWA7875-5f     NWA7875-5b

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Full Slice #6: 9.1g, 57.3 x 27.7 x 2.4mm SOLD

NWA7875-6f     NWA7875-6b

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