19.03g Martian Meteorite Shergottite Stunning Slice I NWA 16136
On Offer: 19.03 gram Martian meteorite. This is an exceptional specimen of the diabasic basaltic shergottite NWA 16136.
| Northwest Africa 16136 | |||||||||||||||||||||||||||||
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| Basic information |
Name: Northwest Africa 16136 This is an OFFICIAL meteorite name. Abbreviation: NWA 16136 Observed fall: No Year found: 2023 Country: (Northwest Africa) Mass:  158 g |
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| Classification history: |
This is 1 of 318 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). |
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| Comments: | Approved 29 Sep 2023 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 112:
Northwest Africa 16136 (NWA 16136) (Northwest Africa) Purchased: 2023 Classification: Martian meteorite (Shergottite) History: A single sample weighing 158 g was found in northwest Africa and subsequently sold to a meteorite dealer in the United States. Aerolite Meteorites purchased the stone in 2023. Physical characteristics: Stone is light greenish-gray with a distinctive diabasic texture. Sample bears a striking external resemblance to Gadamis 001. Petrography: Description and classification (A. Love, App) Sample shows diabasic texture composed of up to 1.2cm long twinned, zoned clinopyroxene laths and interstitial lath-shaped masses of maskelynite. Maskelynite also occurs as radiating bundles of smaller lath-shaped crystals, described by AJ Irving as sheafs. Rare symplectites occur at the grain boundaries. Additional minerals and phases are: Ti magnetite, ilmenite, pyrrhotite, a silica polymorph, mesostasis, merrillite and apatite. Geochemistry: (A. Love, App) pigeonite cores(Fs30.5±1.4Wo14.0±2.8, Fe/Mn=29.0±1.4, Mg#=64.5±2.2 n=3); augite cores (Fs24.3±2.0Wo29.2±3.0, Fe/Mn=27.5±1.1 n=15); pigeonite rims (Fs57.3±14.0Wo15.7±2.0, Fe/Mn=35.0±3.5, Mg#=28.9±17.3, n=37); augite rims (Fs45.7±11.5Wo24.6±4.5, Fe/Mn=34.1±2.9, Mg#=39.8±12.8, n=23); Maskelynite (An49.9±5.0Or1.8±0.8, n=8). Classification: Martian achondrite (Basaltic shergottite) Martian achondrite (Basaltic shergottite M-S4 low weathering) Based on textures and mineral compositions, sample is a basaltic shergottite. Specimens: Elizabeth Vieira (Aerolite Meteorites) holds the main mass. A polished thin section a mount and 2 slices weighing 20.5 g are on Deposit at App. |
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| Data from: MB112 Table 0 Line 0: |
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| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) | ||||||||||||||||||||||||||||
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