IIICD meteorite

Short description: Group of primitive achondrites

IIICD meteorites

-- Group --

The Nantan meteorite, an example of an IIICD meteorite

Type| Achondrite
Class| Primitive achondrite
Clan| IAB-IIICD-Winonaite
Composition| Meteoric iron with silicate inclusions containing low-Ca pyroxene, high-Ca pyroxene, olivine, plagioclase, troilite, graphite, phosphates, meteoric iron, traces of daubréelite & chromite

IIICD meteorites are a group of primitive achondrites. They are classified in a clan together with the IAB meteorites and the winonaites.[1]

## Contents

* 1 Description
* 2 Parent body
* 3 Classification
* 4 See also
* 5 References

## Description

IIICD meteorites consists dominantly of meteoric iron with silicate inclusions. The silicate inclusions are almost identical to the IAB meteorite inclusions. They contain low-Ca pyroxene, high-Ca pyroxene, olivine, plagioclase, troilite, graphite, different phosphates, meteoric iron and traces of daubréelite and chromite.[1]

## Parent body

It has been established that IAB meteorites and winonaites originated from the same parent body. The same is not yet clear for IIICD meteorites, that originated from the same or a very similar asteroid.[1]

## Classification

The IIICD meteorites are classified as primitive achondrites because they have silicate inclusions and show signs of partial melting.[1] The silicate inclusion are almost identical to silicate inclusions in IAB meteorites, and both are very similar to winonaites. For this reason all three are grouped into the IAB-IIICD-Winonaite clan.[2]

## See also

* Glossary of meteoritics

## References

1. ↑ 1.0 1.1 1.2 1.3 M. K. Weisberg; T. J. McCoy, A. N. Krot (2006). "Systematics and Evaluation of Meteorite Classification". in D. S. Lauretta. Meteorites and the early solar system II. Tucson: University of Arizona Press. pp. 19–52. ISBN 978-0816525621. http://haroldconnolly.com/EES 716 Fall 09 Reading/Lecture 1/Background reading/Weisberg_etal_MESSII.pdf. Retrieved 15 December 2012.
2. ↑ Wasson, J.T; Kallemeyn, G.W (30 June 2002). "the IAB iron-meteorite complex: A group, five subgroups, numerous grouplets, closely related, mainly formed by crystal segregation in rapidly cooling melts". Geochimica et Cosmochimica Acta 66 (13): 2445–2473. doi:10.1016/S0016-7037(02)00848-7.

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Meteorites and meteoritics

Meteorite...|

* Glossary
* Fall
* bolide
* impactite
* statistics
* strewn field
* Find
* hunting
* Largest
* Micrometeorite
* Notable
* Parent body

Classification|

| By type, class,
clan, group
and grouplet|

| Chondrite|

* Carbonaceous
* CB
* CH
* CI
* CK
* CM
* CO
* CR
* CV
* C ungrouped
* Enstatite
* EH
* EL
* Kakangari
* Ordinary
* H
* L
* LL
* Rumuruti

|

Achondrite|

| Primitive|

* Acapulcoite
* Brachinite
* IAB
* IIICD
* Lodranite
* Ureilite
* Winonaite

|

Asteroidal|

* Angrite
* Aubrite
* HED
* Diogenite
* Eucrite
* Howardite

Lunar|

* Impact breccia
* Mare basalts
* List

Martian|

* Balsaltic Breccia
* NWA 7034
* Chassignites
* Kaidun
* Nakhlites
* Orthopyroxenite
* ALH84001
* Shergottites
* Martian meteorites list
* Meteorites on Mars list

Iron|

* IC
* IIAB
* IIC
* IID
* IIE
* IIG
* IIIAB
* IIIE
* IIIF
* IVA
* IVB

Stony-iron|

* Mesosiderite
* Pallasite
* Main group
* Eagle Station
* Pyroxene

Structural|

* Ataxite
* Hexahedrite
* Octahedrite

Obsolete terms|

* Amphoterite
* Nonmagmatic meteorite

Mineralogy and
petrology|

* Characteristics
* shock
* TKW
* weathering
* Grains
* chondrule
* presolar
* Minerals
* Ca–Al-rich inclusion
* extraterrestrial materials
* meteoric iron
* Patterns
* Neumann lines
* Widmanstätten
* CI1 fossils

Lists|

* Meteorites by
* find location
* name
* type
* Awards
* Journals
* Organizations

* See also: Asteroid
* Atmospheric entry
* Comet
* Impact event
* Meteor
* shower
* Meteoroid
* Near-Earth object

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