» Meteorite: NWA 4960 » Meteoritical Bulletin Database
Northwest Africa 4960
Find: 2007
Classification: Achondrite Eucrite, monomict breccia

History and Physical Characteristics:
A single 29 g stone was purchased in Erfoud Morocco in August 2007. Some fusion crust remains, although much has been wind ablated away leaving a translucent surface, chemical weathering is minor.
Petrography (T. Bunch and J Wittke, NAU):
Monomict cumulate basalt breccia that is highly shocked. Plagioclase is completely recrytallized. Pyroxenes are partially recrystallized, unrecrystallized pyroxenes have reduced birefringence, shock lamellae, and are darkened by shock decorations. Unusual amount of metal for a eucrite (vol. % = 4). Sparse, but large chromite grains (0.3 to 1.1 mm) are present. Weathering grade is low with some staining around metal grains.
Mineral compositions:
Fs45.7Wo1.9 (FeO/MnO = 28); lamellae, Fs8.2Wo14.8; augite, Fs16.6Wo46.1. Plagioclase, An 87.8, chromite cr# = 81, and metal Ni = 0.87 wt %.
Specimen Picture Weight Description Prices

Name : NWA 4960
Class : Achondrite, Eucrite S5/W-low
Region: Erfoud, Maroco
Date : 03.2007
TKW : 29g

Highly shocked, but fresh eucrite. Contain alot of iron.

23x25x2 mm

full slice 20$/g = 50$
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