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MUSEUM QUALITY!!!
MARVELOUSNWA11288 METEORITE!!!
MARTIAN SHERGOTTITE FROM NORTHWEST AFRICA!!!
RARE! SHOCKED AND VESICULATED!!!
CUT THIN FOR MAXIMUM SURFACE AREA!!!
FANTASTICPART SLICE!!!
Find: 2015!!!
Type: Martian Shergottite!!!
TKW: 407 Grams!!!
Location: Northwest Africa!!!
Specimen weight:8.2 grams!!!
Specimen Type:Part slice!!!
Northwest Africa 11288Basic informationName: Northwest Africa 11288
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11288
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 407 Bulletin:MB 106(2018)Martian (shergottite)Recommended:Martian (shergottite)
This is 1 of 189 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).
Search for other: Martian meteorites
Comments:Approved 9 Jun 2017WriteupWriteup from MB 106:
Northwest Africa 11288(NWA 11288)
(Northwest Africa)
Purchased: 2015 Jan 19
Classification: Martian meteorite (Shergottite)
History: Purchased by Marc Jost Agadir, Morocco, from Aziz Habibi
Physical characteristics: Greenish gray, heterogeneous looking stones (five fragments of 7.14 to 332.5 g) with partially preserved fusion crust.
Petrography: (B. Hofmann, NMBE and Å. Rosén, Bern) The meteorite consists of dominant calcic pyroxene occurring as elongated crystals 2-3 mm in length and maskelynite typically 1-2 mm in size. Rare free silica intergrown with maskelynite. The meteorite shows a high abundance of vesicular glasses, a dark one is shock melt and a lighter one possibly fusion crust intruded into preexisting cavities.
Geochemistry: (Å. Rosén, Bern and B. Hofmann, NMBE) Pyroxene compositions are Fs36.4±10.9Wo25.3±8.7 (Fs20.6-65.5Wo9.2-35.6), mean FeO/MnO = 33.3±5.4 (n=120). Maskelynite has An50.1±3.7Or2.3±1.2 (An40.7-54.7Or1.3-6.2). Dark/green glass has SiO2 50.8/49.3, Al2O3 8.06/8.15, CaO 11.5/11.3, MgO 7.7/7.6, FeO 18.1/18.3, MnO 0.48/0.49, Na2O 1.04/1.53, K2O 0.18/0.07, TiO2 0.88/0.92, Cr2O3 0.16/0.16, FeO/MnO 38.1/37.7 (n= 16/20). Oxygen isotopes: (R. Greenwood, OU) δ18O=4.932, δ17O=2.902, Δ17O= 0.337 (all ‰).
Classification: Based on petrography, mineral compositions (including Fe/Mn-ratios) and oxygen isotopes this is a strongly shocked shergottite.
Specimens: 31.1 g plus one polished thin section at NMBE. Main mass: Marc Jost, SJS.
Data from:
MB106
Table 0
Line 0:Place of purchase:Agadir, MoroccoDate:P 2015 Jan 19Mass (g):406.6Pieces:5Class:Martian (shergottite)Shock stage:highWeathering grade:lowFerrosilite (mol%):36.4±10.9Wollastonite (mol%):25.3±8.7Classifier:B. Hofmann, NMBE, Å. Rosén, BernType spec mass (g):31.1Type spec location:NMBEMain mass:SJSComments:Submitted by Beda Hofmann
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