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Martian Meteorites | Lunar Rocks | HED Group | PAC Group | Carbonaceous Chondrites | Rare Chondrites Last Updated: 7 May 2018

CV Group

The chondrites of this group are named for their type specimen, the meteorite of Vigarano, which fell in Italy in 1910. The CV group has about 50 members, but the number of actual CV falls has to be estimated to be somewhat lower since many of them are paired finds from the hot deserts of Africa and the blue-ice fields of Antarctica.

Most CV chondrites belong to petrologic type 3, and only one has been found to belong to type 2 as well as one other that has been classified as type 4. The structure and composition of these carbonaceous chondrites is more close to that of ordinary chondrites. In a dark-grey matrix of mainly iron-rich olivine, the meteorites of the CV group exhibit large, well-defined chondrules that are made of magnesium-rich olivine, often surrounded by iron sulfide. The meteorites of this group also contain white, irregular inclusions of different size that often make up more than 5% of the meteorite. These inclusions are high-temperature minerals called CAIs (calcium-aluminium inclusions) and are composed of silicates and oxides of calcium, aluminium, and titanium.

These large CAIs, characteristic of CV chondrites, have been intensely studied in the famous meteorite of Allende. Allende fell in Mexico in 1969, shortly before Neil Armstrong took his first step on the Moon. The CAIs of Allende contain fine-grained, microscopic diamonds - and those diamonds exhibit strange isotopic signatures that point to an origin outside of our solar system. They are interstellar grains that have proven to be older than the earth and the sun, and probably they are the product of a nearby supernova, of a dying star that made his last breath when our own system formed. Traces of this supernova have been trapped within the CAIs and preserved in the CV group and other carbonaceous chondrites to this day.


NWA 760

Nov. 2000, Morocco

1.581 kg

CV3

contains giants CAI

article about amoeboid olivine agregates in NWA 760 Carbonaceous Chondrite

 

NWA 760-00

91.89 gr

Endcut with fusion crust !

1400 $

NWA 760-01

45.32 gr

Crusted endcut with CAI inclusions !

Sold

NWA 760-02

10.05 gr

Endcut with geant chondrule !

SOLD

NWA 760-03

7.70 gr

Small endcut with a patch of fusion crust !

SOLD

NWA 760-04

4.05 gr

Very nice small endcut with crust on one eedge !

SOLD

NWA 760-05

8.58 gr

Nice fragment with an open window showing the typical CV3 matrix !

160 $

NWA 760-06

2.50 gr

Very nice small slice, CAI and colored chondrules !

SOLD

NWA 760-07

7.36 gr

Fragment with a cut face !

SOLD

NWA 760-08

10.83 gr

An other fragment of this CV3

170$

 

Chondrites for Sale :
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   > CM Group (Mighei Type)
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>Ordinary chondrite
 
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