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

Acapulcoites

The name of this small group of primitive achondrites is derived from its only witnessed fall, the meteorite of Acapulco that fell in Mexico in 1976. Since its composition is nearly chondritic, Acapulco was initially classified as an anomalous chondrite, although it does not contain any relict chondrules. However, when similar meteorites were subsequently found, the acapulcoite group was formed to describe a distinct class of primitive achondrites. Acapulcoites mark the transition between primordial chondritic matter and more differentiated rocks. The acapulcoite group presently comprises 12 members, if one excludes probable pairings.

Acapulcoites are composed primarily of fine-grained olivine, orthopyroxene, minor plagioclase, nickel-iron metal, and the iron sulfide, troilite. They have mineral compositions that are intermediate between those of E and H chondrites, but they exhibit a characteristic oxygen isotopic pattern distinct from all other known chondrite groups. Importantly, some acapulcoites have been shown to contain a few relict chondrules such as the meteorite of Monument Draw, Texas, and one member actually exhibits an abundance of distinct chondrules - our recent find from Tissemoumine, Morocco, officially named NWA 725. This unique acapulcoite is actually a scientific sensation, and it is one of our best finds. The presence of distinct chondrules within NWA 725 attests to the fact that the acapulcoites represent an extremely primitive group, a true transition between chondrites and achondrites. It is thought that they originated on the same parent body as the closely related lodranites, another class of primitive achondrites.

NWA 725 - Tissemoumine

Found May 2000, Morocco
TKW 3.8 kg
Acapulcoite
Contains relics chondrules!

 

NWA 725 -00

complete fresh individual !!

has a small open widow for testing

SOLD

Price on request

NWA 725 -01

complete fresh individual !!

121.1gr

Price on request

 

NWA 725 -02

part slice with crust

4.42 gr

SOLD

NWA 725 -03

full slice, fully crusted......

3.30gr

SOLD

NWA 725 -04

full slice, crusted + relic chondrules...

2.63gr

Sold

NWA 725 -05

full slice with many relic chondrules

3.00gr

SOLD

NWA 725 -06

half individual with open window

24.45gr

Price on request

NWA 725 -07

large crusted full slice, a very good specimen

41.22gr

Price on request

NWA 725 -08

thick endcut with crust on the edge !

89.25 gr

Price on request

NWA 725 -09

thick piece with crust

34.25gr

SOLD

NWA 725 - 10

thick piece of acapulcoite

18.67 gr

SOLD 

NWA 725 -11

Nice slice with crust

5.28 gr

SOLD 

NWA 725 -12

Nice slice with crust

6.10 gr

SOLD

More slices available, ask for your size !!!

 

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