[meteorite-list] The Perils of Type Collecting - A Guide

From: Zelimir.Gabelica at uha.fr <Zelimir.Gabelica_at_meteoritecentral.com>
Date: Fri, 05 Mar 2010 00:05:41 +0100
Message-ID: <20100305000541.nv7jpk74uqim8owc_at_w3mail.univ-mulhouse.fr>

Hi Mike,

Can you tell me the name of the CM3 ?

Btw: a very complete list of types (& subtypes) can also be found in
both the Met. Bull. database or at the end of the "Meteorites from A
to Z" booklet (ed 2008) by Jensen bros.

Note: Murchison is CM2.5 (Rubin & al, Geochim, Cosmochim. Acta, 2008)

Note 2: don't forget to add CK3 and C2 (Tagish) and a few other (see
Carl's remarks)

Note 3: I am not sure "metachondrite" is official, though I very much
appreciate that new nomenclature suggested by D. Weir in his
outstanding comprehensive site.

Best wishes,

Zelimir



Galactic Stone & Ironworks <meteoritemike at gmail.com> a ?crit?:

> Thanks to Carl, Katsu, Greg, Martin, and everyone else who provided
> corrections and input on this list. I have made corrections and the
> revised list is presented below :
>
> Carbonaceous Chondrites :
>
> CI (Ivuna)
> CM1 (Mighei)
> CM2 (subdivided into CM2.0 to CM2.6)
> CM3
> CO3 (Ornans) (subdivided into CO3.03 to CO3.7)
> CV (Vigarano) (also CV2 and CV3)
> CK (Karoonda) (CK4, CK5, CK6)
> CR (Renazzo) (CR1, CR2, CR3)
> CB (Bencubbin)
> CH
> CR ungrouped
> C4 ungrouped
> C ungrouped
>
>
> Ordinary Chondrites :
>
> Rumuruti R3 (subdivided into R3.5-6 to R3.9)
> R4
> R5
> R6
>
> LL (subdivided into LL3.0 to LL3.9)
> LL4
> LL5
> LL5/6
> LL6
> LL6/7
> LL7
> LL impact melt
>
> LL transitional (L/LL3 to L/LL6)
> L (subdivided into L3.0 to L3.9)
> L4
> L5
> L6
> L6/7
> L7
> L impact melt
>
> H/L transitional (H/L3 to H/L6 IMB, H/L3.6 to H/L3-4)
> H (subdivided into H3.0 to H3.9)
> H4
> H5
> H6
> H7
> H impact melt
>
> ungrouped ordinary chondrites
>
>
> Enstatite Chondrites :
>
> EL (EL3 to EL7)
> EL impact melt
> EH/L
> EH (EH3 to EH7)
> EH impact melt
> ungrouped enstatite chondrites
>
> K (Kakangari)
>
> Meta-chondrites (M-CV, M-CR, M-H, M-LL)
>
>
> Primitive Chondrites :
>
> Acapulcoite
> Lodranite
> Winonaites
> ungrouped primitive chondrites
>
>
> Achondrites :
>
> Howardite (subdivided into fragmental breccia and regolith breccia)
> Eucrite (monomict and polymict with each having subclasses)
> Diogenite (monomict and polymict)
> Olivine Diogenite
> Dunite
> Ureilite (monomict and polymict)
>
>
> Martian achondrites :
>
> Shergottite
> Pyroxene-phyric basaltic shergottite
> Olivine-phyric basaltic shergottite
> Olivine-orthopyroxene-phyric basaltic shergottite
> Pyroxene-peridotitic (Wehrlitic) shergottite
> Lherzolitic shergottite
> Diabasic shergottite
>
> Nakhlite
> Chassignite
> Orthopyroxenite (ALH 84001)
>
>
> Lunar Achondrites :
>
> Feldspathic breccias
> Regolith breccia
> Fragmental breccia
> Impact melt breccia
> Granulitic breccia
> Mafic-rich
> Thorium-rich
> KREEP-rich
>
> Mingled Breccia
> Mare Basalt
>
>
> Other Achondrites :
>
> Angrites (Plutonic and Basaltic)
> Brachinite
> Aubrite
> ungrouped achondrites (Ibitira, Pasamonte, etc)
>
>
> Stony-Irons :
>
> Mesosiderites (1A,1B,2A,2B,2C,3A,3B,4A,4B)
> ungrouped mesosiderites
>
> Pallasites (Main Group, Eagle Station group, Pyroxene group)
> Pallasite-am (anomalous, PMG-am, PMG-as)
> ungrouped pallasites
>
>
> Iron meteorites :
>
> Note, iron meteorites are a can of worms. I will only focus on the
> main chemical groups, and not the various grouplets and sub-types of
> each main chemical group. Also note that many of these types include
> silicated varities. Listing all of the known sub-types of irons would
> require a LONG list resembling a flow-chart.
>
> IAB
> IC
> IIAB
> IIC
> IID
> IIE
> IIF
> IIG
> IIIAB
> IIIE
> IIIF
> IVA
> IVB
> ungrouped irons
>
> ----------------------
>
> On 3/4/10, Katsu OHTSUKA <ohtsuka at jb3.so-net.ne.jp> wrote:
>> CM2 (Mighei-type)
>>
>> Katsu
>>
>> ----- Original Message -----
>> From: "Greg Stanley" <stanleygregr at hotmail.com>
>> To: <cdtucson at cox.net>; <meteorite-list at meteoritecentral.com>;
>> <damoclid at yahoo.com>; <meteoritemike at gmail.com>
>> Sent: Thursday, March 04, 2010 9:29 AM
>> Subject: Re: [meteorite-list] The Perils of Type Collecting - A Guide
>>
>>
>>>
>>> Murchison is a CM2
>>>
>>> Greg S.
>>>
>>> ----------------------------------------
>>>> Date: Wed, 3 Mar 2010 19:12:20 -0500
>>>> From: cdtucson at cox.net
>>>> To: meteorite-list at meteoritecentral.com; damoclid at yahoo.com;
>>>> meteoritemike at gmail.com
>>>> Subject: Re: [meteorite-list] The Perils of Type Collecting - A Guide
>>>>
>>>> Good list,
>>>> missing is the division between
>>>> CBa Buencubbin
>>>> CBb HAH 237
>>>> CK3
>>>> and Tagish lake is not ungrouped but I think is a C2.
>>>> --
>>>> Carl or Debbie Esparza
>>>> Meteoritemax
>>>>
>>>>
>>>> ---- Richard Kowalski wrote:
>>>>> Thanks a lot Mike.
>>>>>
>>>>> I thought I had pretty much completed my type set a few months ago, but
>>>>> now I see that I'm missed a few gradations that maybe I should pay
>>>>> attention to.
>>>>>
>>>>> I think, for budgetary and sanity sake, I'll have to be selective in how
>>>>>
>>>>> fine my divisions are than to try to get every sub-type you mention!
>>>>>
>>>>> --
>>>>> Richard Kowalski
>>>>> Full Moon Photography
>>>>> IMCA #1081
>>>>>
>>>>>
>>>>> --- On Wed, 3/3/10, Galactic Stone & Ironworks wrote:
>>>>>
>>>>>> From: Galactic Stone & Ironworks
>>>>>> Subject: [meteorite-list] The Perils of Type Collecting - A Guide
>>>>>> To: "Meteorite List"
>>>>>> Date: Wednesday, March 3, 2010, 4:18 PM
>>>>>> Greetings Listees and fellow
>>>>>> collectors,
>>>>>>
>>>>>> To the veteran collector, there will be little of interest
>>>>>> in this
>>>>>> post. This post is directed at the silent newbie or
>>>>>> beginner lurkers
>>>>>> who are sorting through this List and trying to find their
>>>>>> way around
>>>>>> the world of collecting meteorites.
>>>>>>
>>>>>> Many new collectors often want one of each type of
>>>>>> meteorite. Many
>>>>>> veteran collectors abandon this pursuit because the task is
>>>>>> quite
>>>>>> daunting. So when you hear talk about
>>>>>> "type collecting", or building
>>>>>> a "type collection", what exactly does that mean? I
>>>>>> hope the
>>>>>> following brief article will answer those questions, or at
>>>>>> least point
>>>>>> the reader in the right general direction. Note, I
>>>>>> gleaned much of
>>>>>> this type information from David Weir's authoritative
>>>>>> website
>>>>>> "Meteorite Studies" and from the Meteoritical
>>>>>> Bulletin. I do not
>>>>>> claim that this list is 100% complete or without error, so
>>>>>> if the
>>>>>> reader spots an error or omission, please reply and correct
>>>>>> it.
>>>>>>
>>>>>> -----
>>>>>>
>>>>>> The Perils of Type Collecting ........
>>>>>>
>>>>>> I started out collecting meteorites with a small sample of
>>>>>> NWA 4293 -
>>>>>> an ordinary high iron chondrite of the H6 type. It was
>>>>>> about the size
>>>>>> of a dog-food kibble and it looked like one. But I was
>>>>>> instantly
>>>>>> hooked, and I wanted to have one each of the different
>>>>>> types of
>>>>>> meteorite. This is known as "type collecting" or building a
>>>>>> "type
>>>>>> collection".
>>>>>>
>>>>>> The danger of type collecting (besides the damage to one's
>>>>>> checking
>>>>>> account) is that the various petrologic types are
>>>>>> subdivided into
>>>>>> various grades according to metamorphism.
>>>>>>
>>>>>> For example, take the H chondrite group that my NWA 4293
>>>>>> sample belonged to.
>>>>>>
>>>>>> There are H3 chondrites, H4 chondrites, H5 chondrites, and
>>>>>> H6
>>>>>> chondrites. Did I really need one each of these subtypes?
>>>>>> Well, it
>>>>>> depends on how deep a collector wants to go into the rabbit
>>>>>> hole.
>>>>>> There are distinct differences between the various H types.
>>>>>> The number
>>>>>> attached to each is more than just a simple weathering
>>>>>> grade or shock
>>>>>> grade. It represents a progession in the H-chondrite family
>>>>>> from least
>>>>>> altered to most altered. H3 chondrites are loaded with
>>>>>> chondrules, H4
>>>>>> have some chondrules, H5 has few chondrules, and H6 has
>>>>>> virtually no
>>>>>> visible chondrules. A new grade of H7 has been added as
>>>>>> well. So, a
>>>>>> collector could simply have a single Hx chondrite and say
>>>>>> that the
>>>>>> H-chondrites are represented. Or, the collector could have
>>>>>> one each of
>>>>>> the different subtypes from 3 to 7.
>>>>>>
>>>>>> Another peril is the changing of nomenclature. For example,
>>>>>> the
>>>>>> K-subgroup of carbonaceous chondrites was only recognized
>>>>>> and
>>>>>> designated in 1990. Up until then, Karoonda was considered
>>>>>> a CV4
>>>>>> meteorite of the Vigarano family. Now Karoonda is
>>>>>> recognized as
>>>>>> distinctly different type of carbonaceous chondrite, so it
>>>>>> was made
>>>>>> into it's own group. Now we have CK4, CK5, and CK6
>>>>>> meteorites - all
>>>>>> represent a progression in metamorphism and have visible
>>>>>> (and
>>>>>> chemical) differences from other grades. There are standout
>>>>>> members of
>>>>>> each subgroup, so where does one draw the line? Should the
>>>>>> collector
>>>>>> acquire a sample of Karoonda and be done with it? Or should
>>>>>> the
>>>>>> collector go out and track down CK4, CK5 and CK6
>>>>>> meteorites? Again, it
>>>>>> depends on how extensive and exhaustive a collector wants
>>>>>> to be with
>>>>>> their type collection. Budget will also play a role as
>>>>>> well, because
>>>>>> an exhaustive type collection is a daunting project.
>>>>>>
>>>>>> Lastly, one must consider the ungrouped meteorites. These
>>>>>> are oddball
>>>>>> meteorites that do not neatly fit into the pre-existing
>>>>>> meteorite
>>>>>> types. There are ungrouped chondrites, ungrouped
>>>>>> achondrites, and
>>>>>> ungrouped irons. No type collection can overlook these
>>>>>> meteorites
>>>>>> because some of them are types unto themselves with unique
>>>>>> qualities.
>>>>>>
>>>>>> For those who want to build a definitive and complete type
>>>>>> collection,
>>>>>> here is a list of every known type and subtype of
>>>>>> meteorite. This list
>>>>>> was culled from other sources, including David Weir's
>>>>>> authoritative
>>>>>> "Meteorite Studies" website linked at the end of this
>>>>>> post.
>>>>>>
>>>>>> Carbonaceous Chondrites :
>>>>>>
>>>>>> CI (Ivuna)
>>>>>> CM1 (Murchison)
>>>>>> CM2 (subdivided into CM2.0 to CM2.6)
>>>>>> CM3
>>>>>> CO3 (Ornans) (subdivided into CO3.03 to CO3.7)
>>>>>> CV (Vigarano) (also CV2 and CV3)
>>>>>> CK (Karoonda) (CK4, CK5, CK6)
>>>>>> CR (Renazzo) (CR1, CR2, CR3)
>>>>>> CB (Bencubbin)
>>>>>> CH
>>>>>> CR ungrouped
>>>>>> C4 ungrouped
>>>>>> C ungrouped (Tagish Lake, others)
>>>>>>
>>>>>>
>>>>>> Ordinary Chondrites :
>>>>>>
>>>>>> Rumuruti R3 (subdivided into R3.5-6 to R3.9)
>>>>>> R4
>>>>>> R5
>>>>>> R6
>>>>>>
>>>>>> LL (subdivided into LL3.0 to LL3.9)
>>>>>> LL4
>>>>>> LL5
>>>>>> LL5/6
>>>>>> LL6
>>>>>> LL6/7
>>>>>> LL7
>>>>>> LL impact melt
>>>>>>
>>>>>> LL transitional (L/LL3 to L/LL6)
>>>>>> L (subdivided into L3.0 to L3.9)
>>>>>> L4
>>>>>> L5
>>>>>> L6
>>>>>> L6/7
>>>>>> L7
>>>>>> L impact melt
>>>>>>
>>>>>> H/L transitional (H/L3 to H/L6 IMB, H/L3.6 to H/L3-4)
>>>>>> H (subdivided into H3.0 to H3.9)
>>>>>> H4
>>>>>> H5
>>>>>> H6
>>>>>> H7
>>>>>> H impact melt
>>>>>> ungrouped ordinary chondrites
>>>>>>
>>>>>>
>>>>>> Enstatite Chondrites :
>>>>>>
>>>>>> EL (EL3 to EL7)
>>>>>> EL impact melt
>>>>>> EH/L
>>>>>> EH (EH3 to EH7)
>>>>>> EH impact melt
>>>>>> ungrouped enstatite chondrites
>>>>>>
>>>>>> K (Kakangari)
>>>>>>
>>>>>> Meta-chondrites (M-CV, M-CR, M-H, M-LL)
>>>>>>
>>>>>>
>>>>>> Primitive Chondrites :
>>>>>>
>>>>>> Acapulcoite
>>>>>> Lodranite
>>>>>> Winonaites
>>>>>> ungrouped primitive chondrites
>>>>>>
>>>>>>
>>>>>> Achondrites :
>>>>>>
>>>>>> Howardite (subdivided into fragmental breccia and regolith
>>>>>> breccia)
>>>>>> Eucrite (monomict and polymict with each having
>>>>>> subclasses)
>>>>>> Diogenite (monomict and polymict)
>>>>>> Olivine Diogenite
>>>>>> Dunite
>>>>>> Ureilite (monomict and polymict)
>>>>>>
>>>>>>
>>>>>> Martian achondrites :
>>>>>>
>>>>>> Shergottite
>>>>>> Pyroxene-phyric basaltic shergottite
>>>>>> Olivine-phyric basaltic shergottite
>>>>>> Olivine-orthopyroxene-phyric basaltic shergottite
>>>>>> Pyroxene-peridotitic (Wehrlitic) shergottite
>>>>>> Lherzolitic shergottite
>>>>>> Diabasic shergottite
>>>>>>
>>>>>> Nakhlite
>>>>>> Chassignite
>>>>>> Orthopyroxenite (ALH 84001)
>>>>>>
>>>>>>
>>>>>> Lunar Achondrites :
>>>>>>
>>>>>> Feldspathic breccias
>>>>>> Regolith breccia
>>>>>> Fragmental breccia
>>>>>> Impact melt breccia
>>>>>> Granulitic breccia
>>>>>> Mafic-rich
>>>>>> Thorium-rich
>>>>>> KREEP-rich
>>>>>>
>>>>>> Mingled Breccia
>>>>>> Mare Basalt
>>>>>>
>>>>>>
>>>>>> Other Achondrites :
>>>>>>
>>>>>> Angrites (Plutonic and Basaltic)
>>>>>> Brachinite
>>>>>> Aubrite
>>>>>> ungrouped achondrites (Ibitira, Pasamonte, etc)
>>>>>>
>>>>>>
>>>>>> Stony-Irons :
>>>>>>
>>>>>> Mesosiderites (1A,1B,2A,2B,2C,3A,3B,4A,4B)
>>>>>> ungrouped mesosiderites
>>>>>>
>>>>>> Pallasites (Main Group, Eagle Station group, Pyroxene
>>>>>> group)
>>>>>> Pallasite-am (anomalous, PMG-am, PMG-as)
>>>>>> ungrouped pallasites
>>>>>>
>>>>>>
>>>>>> Iron meteorites :
>>>>>>
>>>>>> Note, iron meteorites are a can of worms. I will only focus
>>>>>> on the
>>>>>> main chemical groups, and not the various grouplets and
>>>>>> sub-types of
>>>>>> each main chemical group. Also note that many of
>>>>>> these types include
>>>>>> silicated varities. Listing all of the known
>>>>>> sub-types of irons would
>>>>>> require a LONG list resembling a flow-chart.
>>>>>>
>>>>>> IAB
>>>>>> IC
>>>>>> IIAB
>>>>>> IIC
>>>>>> IID
>>>>>> IIE
>>>>>> IIF
>>>>>> IIG
>>>>>> IIIAB
>>>>>> IIIE
>>>>>> IIIF
>>>>>> IVA
>>>>>> IVB
>>>>>> ungrouped irons
>>>>>>
>>>>>> I think that is all of them - as currently recognized by
>>>>>> the
>>>>>> Meteoritical Society Nomenclature Committee. If anyone can
>>>>>> think of
>>>>>> some I missed, please add them to this list.
>>>>>>
>>>>>> David Weir's Meteorite Studies website -
>>>>>> http://www.meteoritestudies.com/
>>>>>>
>>>>>> Best regards and happy collecting!
>>>>>>
>>>>>> MikeG
>>>>>>
>>>>>>
>>>>>> --
>>>>>> ------------------------------------------------------------
>>>>>> Mike Gilmer - Galactic Stone & Ironworks Meteorites
>>>>>> http://www.galactic-stone.com
>>>>>> http://www.facebook.com/galacticstone
>>>>>> ------------------------------------------------------------
>>>>>> ______________________________________________
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>>>>>>
>>>>>
>>>>>
>>>>>
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>>
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>
>
> --
> ------------------------------------------------------------
> Mike Gilmer - Galactic Stone & Ironworks Meteorites
> http://www.galactic-stone.com
> http://www.facebook.com/galacticstone
> ------------------------------------------------------------
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Received on Thu 04 Mar 2010 06:05:41 PM PST