Very nice rare carbonaceous chondrite CR2 NWA 13336 6.0g slice

Description

This is a beautifull Carbonaceous chondrite of rare type CR2 6.0g slice.
NWA 13336 of S1 and W2
From MetBull:
Northwest Africa 13336
(NWA 13336)
(Northwest Africa)
Purchased: 2020
Classification: Carbonaceous chondrite (CR2)
History
: The meteorite was purchased from a meteorite dealer in Morocco.
Physical characteristics
: Light-brownish rock with some fusion crust.
Petrography
: The meteorite is a carbonaceous chondrite composed of abundant, often slightly flattened chondrules with an apparent mean diameter of about 800 µm and about 30-40% almost black matrix. Chondrules are mostly of type I but two type II chondrules with highly unequilibrated olivine were observed in the section studied. Some chondrules are metal-decorated typical of CR.
Geochemistry
: olivine in type I chondrules: Fa
1.3±0.4
, Cr
2
O
3
: 0.49±0.05 wt%, n=13; low-Ca pyroxene: Fs
2.8±0.3
Wo
0.5±0.6
, n=16; olivine in type II chondrules: Fa
28.3±9.0
(Fa
17.0-46.1
, n=9). Matrix analyses yield an average total of 88.1±1.2 wt% (5 µm defocused beam, N=10) suggesting the presence of hydrous minerals.