[meteorite-list] question about olivine diogenites

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Fri, 11 Jun 2010 16:25:27 -0400
Message-ID: <AANLkTin9Tb-ihEouHZ5wQOOqKUV4_tsGMebRmGI-t6f1_at_mail.gmail.com>

Hi Marc and List,

I have a lovely peridotite xenolith in my cabinet and I couldn't
imagine a meteorite that closely resembles one. But now that I see
the photos in the Met Bulletin, I can definitely see the similarities.
 What a gorgeous meteorite. How much for one of those big fragments?
Do you take PayPal? ;) LOL

http://tin.er.usgs.gov/meteor/metbull.php?code=47641

Best regards,

MikeG


On 6/11/10, Marc Fries <fries at psi.edu> wrote:
> The others here have already nailed the technical discussion... For my
> part, I'll just say that I was lucky enough to be there when MIL 07001 was
> discovered and would argue in favor of classifying it as a
> 'frickinbeautifulite'. It was a roughly softball-sized, sparkling green
> stone parked on a big open field of blue ice. It looked remarkably like the
> peridotite xenoliths scattered here and there in McMurdo, with fusion crust
> substituting for the clinging bits of basalt on the xenoliths. That
> particular find was probably the highlight of the whole field season.
>
> Cheers,
> Marc Fries
>
>
> On Jun 11, 2010, at 12:55 PM, Greg Stanley wrote:
>
>>
>> List:
>>
>> I find this interesting and it reminds me of something I've thought about
>> for a while.
>>
>> How and for what reasons are meteorites re-classified and then changed?
>> I've seen this occur on a number of meteorites. Why does this happen, and
>> how does it start? Some examples have been mentioned in this post. Is it
>> requested by the finder? Does the finder send another sample to a second
>> institution? Or are specimens randomly re-analyzed? Look at ALH84001 -
>> that was originally a diogenite.
>>
>> I've always wondered if there are any other meteorites that have the wrong
>> classification sitting in someones display cabinet.
>>
>> Greg S.
>>
>> ----------------------------------------
>>> Date: Fri, 11 Jun 2010 12:18:04 -0700
>>> From: tbear1 at cableone.net
>>> To: meteoritemike at gmail.com; kieron.heard at ukonline.co.uk
>>> CC: meteorite-list at meteoritecentral.com
>>> Subject: Re: [meteorite-list] question about olivine diogenites
>>>
>>> Simply put, the NOM COM has no self-imposed authority to establish new
>>> classification nomenclature. Because there is not yet a peer-reviewed
>>> paper
>>> on the issue of olivine-rich diogenites being an "official" designation,
>>> this classification is not "officially" recognized. A paper is in
>>> progress,
>>> that involves Tony Irving, NAU, and others, that will hopefully resolve
>>> the
>>> matter.
>>>
>>> Consider how frustrating the classification mess is when we have
>>> attempted
>>> to classify stones that are>90 vol % olivine, which in terrestrial
>>> terminology is a dunite, only to have the "official classification" given
>>> as
>>> diogenite. Wrong! The definition of diogenite is "achondritic stony
>>> meteorite composed essentially of pyroxene minerals". Olivine is not a
>>> pyroxene.
>>> We (Prof. Irving and NAU) are addressing this and other classification
>>> problems.
>>>
>>> Have PATIENCE, providing that we live long enough, the problems may be
>>> resolved.
>>>
>>> Ted
>>>
>>> IMCA #1110
>>>
>>> On 6/11/10 10:27 AM, "Galactic Stone & Ironworks"
>>> wrote:
>>>
>>>> Hi Kieron and List,
>>>>
>>>> I'll take a stab at this one - although I could be wrong, here is my
>>>> theory -
>>>>
>>>> Perhaps "olivine diogenite" is not fully-accepted nomenclature by all
>>>> scientists and institutions, so maybe it depends on who does the
>>>> classification and who submits the write-up?
>>>>
>>>> Best regards,
>>>>
>>>> MikeG
>>>>
>>>> On 6/11/10, Kieron Heard wrote:
>>>>> Thanks for your replies chaps but I am still mystified. I accept that
>>>>> NWA
>>>>> 1459 is another example of an olivine diogenite, but why then is its
>>>>> recommended classification in the MetBull Database simply 'diogenite'
>>>>> and
>>>>> not 'diogenite-olivine'?
>>>>>
>>>>>
>>>>> Regards, Kieron
>>>>>
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: Greg Hupe [mailto:gmhupe at htn.net]
>>>>> Sent: 11 June 2010 17:30
>>>>> To: Greg Stanley; kieron.heard at ukonline.co.uk;
>>>>> meteorite-list at meteoritecentral.com
>>>>> Subject: Re: [meteorite-list] question about olivine diogenites
>>>>>
>>>>>
>>>>> Hello Kieron, GregS and List,
>>>>>
>>>>> The first recognized Olivine Diogenite was NWA 1459, then came along
>>>>> NWA
>>>>> 1877(w/ pairing 5603, and others), then NWA 5480 (and pairings). I am
>>>>> not
>>>>> familiar with GRA 98108.
>>>>>
>>>>> Hope this helps.
>>>>>
>>>>> Best regards,
>>>>> Greg
>>>>>
>>>>> ====================
>>>>> Greg Hupe
>>>>> The Hupe Collection
>>>>> NaturesVault (eBay)
>>>>> gmhupe at htn.net
>>>>> www.LunarRock.com
>>>>> IMCA 3163
>>>>> ====================
>>>>> Click here for my current eBay auctions:
>>>>> http://search.ebay.com/_W0QQsassZnaturesvault
>>>>>
>>>>> ----- Original Message -----
>>>>> From: "Greg Stanley"
>>>>> To: ;
>>>>> Sent: Friday, June 11, 2010 12:13 PM
>>>>> Subject: Re: [meteorite-list] question about olivine diogenites
>>>>>
>>>>>
>>>>>>
>>>>>> List:
>>>>>>
>>>>>> Is not NWA 5480 an olivine diogenite too?
>>>>>>
>>>>>> Greg S.
>>>>>>
>>>>>> ----------------------------------------
>>>>>>> From: kieron.heard at ukonline.co.uk
>>>>>>> To: meteorite-list at meteoritecentral.com
>>>>>>> Date: Fri, 11 Jun 2010 10:13:49 +0100
>>>>>>> Subject: [meteorite-list] question about olivine diogenites
>>>>>>>
>>>>>>> Hi Folks,
>>>>>>>
>>>>>>> I wonder if anyone can offer some advice? I am pleased to have
>>>>>>> obtained a
>>>>>>> sample of NWA 6149 (prov) - an olivine diogenite. This prompted me to
>>>>>>> do
>>>>>>> some research on the MetBull Database, and I see that there are only
>>>>>>> three
>>>>>>> meteorites that are classified there as 'olivine diogenites' (MIL
>>>>>>> 07001,
>>>>>>> NWA
>>>>>>> 5603 and NWA 6157). Other stones that have in the past been described
>>>>>>> as
>>>>>>> olivine diogenites (such as GRA 98108 and NWA 1459) have recommended
>>>>>>> classifications of 'diogenite', despite seeming to have a significant
>>>>>>> olivine content.
>>>>>>>
>>>>>>> So my question is, What is the requirement for a meteorite to be
>>>>>>> recorded
>>>>>>> in
>>>>>>> the database as as 'olivine diogenite'?
>>>>>>>
>>>>>>> Thanks in advance for any information.
>>>>>>>
>>>>>>>
>>>>>>> Regards, Kieron
>>>>>>>
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Mike Gilmer - Galactic Stone & Ironworks Meteorites
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Received on Fri 11 Jun 2010 04:25:27 PM PDT