[meteorite-list] Biggest Meteorites by Type

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Wed, 9 Jun 2010 16:37:40 -0400
Message-ID: <AANLkTik1-Rbey3Egsw4QU7XR77czLiJi7P56m0EHkAQY_at_mail.gmail.com>

Hi Martin, Greg, and List!

Thanks for the heads-up about the photos and links to Kalahari 009. I
have some reading on Dr. Korotev's website (and elsewhere) to do
tonight. :)

Greg, your new NWA 5400, what class is that again? I want to put it
on the biggest meteorites list, but I don't recall what classification
it is. The Met Bulletin lists it as "Achondrite-ungrouped". There
is a 12kg achon-ung from Russia called "Divnoe", but like all
meteorites in this class, each one is a class unto itself, so
comparing Divnoe to NWA 5400 is like comparing apples to oranges. How
should I single out NWA 5400 on the list? I'm trying to remember the
phrase you used in your original announcement for it, but now I can't
find it.

It's tricky trying to discern which specimen is the biggest using Met
Bulletin and CoM data - because in many cases only the TKW is listed
and there is no mention of how many masses or what the largest single
mass was/is. It's easy to divide the TKW by the number of known
masses and get an average weight per mass, but what I am looking for
is an authoritative statement of what the biggest known single mass
is.

For example, the TKW of Al-Haggounia is listed as "3 MT" and there is
mention of a size range - "It is impossible to assess precisely the
amount of material already (and to be) recovered, but according to
dealers, collectors, and Jambon it is about 3 metric tons composing
many samples of varied sizes (from a few g to 50 kg)." But there is
no way to determine what the largest known mass is from this data
alone. The same is true for many meteorite types. Of course, I am
assuming the Al-Haggounia is the largest of the EL3 type. (despite
being erroneously listed as an aubrite)

Best regards,

MikeG

PS - Greg C, email me and remind me to send you a copy of the completed list. :)


On 6/9/10, Martin Altmann <altmann at meteorite-martin.de> wrote:
> Hi Melanie,
>
> the Tkw of the ordinary chondrites is by faaaaaaaaaaaaaaaaaaaaaaaaaar lower
> than those of the irons.
>
> >From the approx 700 tons in total the Bulletins lists,
> alone 90% are allotted on the only 20 largest iron meteorites.
>
> Unlike in Sahara/NWA the Oman finds are quite good documented,
> there we have in all the 10 years together approx. 6 tons.
> Remember they are stones. Hence probably, (if you would be allowed to do
> so), you could pack them all on a small pick-up truck.
>
> Also the weight of the roughly 7000 Antarctic finds (pairing rate among
> field numbers is 5) is not that impressive, as there even the smallest bogey
> of 1g and less can be better spotted than in a rocky desert and is
> collected.
>
> NWA is somewhat difficult to estimate. Because there is no scientific
> interest, as well as no demand of the private collectors in the usually
> weathered ordinary chondrites, so that they aren't classified and listed in
> the Bulletins.
> There you could play a little bit around, with the ratios of the rare types
> to ordinary types at the observed falls, at Antarctica, at Oman.
> And then you can watch the weights of the rare types among the NWAs to
> conclude, how many ordinary chondrites might have been found among the NWAs.
>
> With that method, I would estimate..
> Nja well, what is the payload of a larger truck 20-30 tons,
> Maybe 2-3 trucks for whole Sahara during the last 20 years.
>
> The biiig dark figure you won't find with the stones or with the NWAs,
> but with the big mass irons.
> Because the tkws in the Bulletins stem from old publications.
> Example. Sikhote is given there with 23 tons,
> but it's estimated, that meanwhile up to 100 tons were harvested.
> Soo each weathered common UNWA-sample is rarer than any Sikhote-specimen!
> Same with Campo, Gibeon and so on.
>
> That's also the reason, why all here on the list have always to smile, when
> they read in the media, that the meteorite affair would be a multi-million
> or even a billion-$$-biz.
> And that's why most think, that it is a little bit hysterical to decree laws
> preventing meteorite hunting,
> cause look, in France and Italy each autumn ten times more of the rarest
> truffles types are found, that stuff, where you have to pay 6000-12000$/kg,
> than meteorites in the Sahara.
> So be aware, that the UNWA in your box of chocolate, that kg-stone you paid
> 30$ for, is in deed so rare, than the same amount, 1 kilogram, of diamonds
> of the best quality!
>
> Sounds strange,
>
> but is so.
>
> Melanie, you can excellently play around with that tool.
> The Bulletin Database, there you can sort also any search by weight!
> http://tin.er.usgs.gov/meteor/metbull.php
>
> Best!
> Martin
>
> PS. Mike at least the smaller of the Kalaharis you can see here:
> http://meteorites.wustl.edu/lunar/stones/kalahari008.htm
>
> If you check the number of publications give there, I'd say, Kalahari is
> well documented.
>
>
>
> -----Urspr?ngliche Nachricht-----
> Von: meteorite-list-bounces at meteoritecentral.com
> [mailto:meteorite-list-bounces at meteoritecentral.com] Im Auftrag von Melanie
> Matthews
> Gesendet: Mittwoch, 9. Juni 2010 20:34
> An: Greg Stanley; mike; meteorite-list at meteoritecentral.com
> Betreff: Re: [meteorite-list] Biggest Meteorites by Type
>
> Hey listers.
> This made me think of something.. Is the TKW of ordinary chondrites that has
> been recovered so far, still less than that of irons? (someone could give an
> estimate?) With such massive amounts of iron meteorites that are known - I'm
> reconsidering my stance on the notion that irons are "rarer" than ordinary
> chondrites?
>
> -----------
> Melanie
> IMCA: 2975
> eBay: metmel2775
> Known on SkyRock Cafe as SpaceCollector09
>
> Unclassified meteorites are like a box of chocolates... you never know what
> you're gonna get!
>
>
>
> ----- Original Message ----
> From: Greg Stanley <stanleygregr at hotmail.com>
> To: mike <meteoritemike at gmail.com>; meteorite-list at meteoritecentral.com
> Sent: Wed, June 9, 2010 10:51:31 AM
> Subject: Re: [meteorite-list] Biggest Meteorites by Type
>
>
> Is there any CV larger then the largest Allende?
> It has the most total weight by far, but I'm not sure about a single stone.
> NWA 2697 was a single stone weighing 9.42 kg.
>
> Greg S.
>
> ----------------------------------------
>> Date: Wed, 9 Jun 2010 12:34:19 -0400
>> From: meteoritemike at gmail.com
>> To: meteorite-list at meteoritecentral.com
>> Subject: [meteorite-list] Biggest Meteorites by Type
>>
>> Hi Listees!
>>
>> I am putting together a list of the world's largest meteorites by
>> type. At first, I am concentrating on the major types and then I'll
>> descend into the rabbit hole of sub-types later.
>>
>> Here is what I have so far -
>>
>> Largest Iron - Hoba
>> Largest chondrite - Jilin
>> Largest aubrite - Norton County
>> Largest Martian meteorite - Zagami
>> Largest Lunar meteorite - NWA 5000 / Kalahari 009
>> Largest pallasite - Brenham
>>
>> If there are any errors here, please correct me. :)
>>
>> I'd love to hear some suggestions for the largest of other types -
>> misc. achondrites, HEDO's, carbonaceous types, etc.
>>
>> Best regards,
>>
>> MikeG
>> http://www.galactic-stone.com
>>
>> --
>> ------------------------------------------------------------
>> Mike Gilmer - Galactic Stone & Ironworks Meteorites
>> http://www.galactic-stone.com
>> http://www.facebook.com/galacticstone
>> ------------------------------------------------------------
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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 Wed 09 Jun 2010 04:37:40 PM PDT