[meteorite-list] finally: L3.00

From: Jeff Grossman <jngrossman_at_meteoritecentral.com>
Date: Wed, 6 Mar 2013 22:21:32 -0700
Message-ID: <E32884A2-5716-48A1-AEEB-8E03096DAABA_at_gmail.com>

Derek Sears, who gave us the first decimal place in his 1980 Nature paper (with a young me as coauthor), used to say that there was more chemical and mineralogical variation among the type 3 chondrites than among the type 4-6 chondrites. We now know that there is as much variation among the type 3.00-3.15 chondrites as there is among the 3.2-6 chondrites. It's kind of logarithmic, in many ways. Different things change at different temperatures, and on different scales.

CO chondrites are less well characterized in this regard. Their finer grain size is a big part of the reason. The fact that there are relatively few of them, and that so many have properties that seem a bit anomalous makes their subdivision all the harder. So we don't have as many of them that have been finely classified.

Jeff

Sent from my iPad

On Mar 6, 2013, at 6:43 PM, "Richard Montgomery" <rickmont at earthlink.net> wrote:

> Hi List,
> Decimels to the x.xx mean much more than I initially realized! (I'm just a fun-loving-meteorite-guy-who paints and stuff)...examples being a few of my collection pieces NWA 2918 (CO3.0); NWA 4620 (CO3) and even Kainsaz (CO3)...leads me to ask those of you deep in the know...have these been initially classified with lesser x.xx distinction and will possibly be revisited with further research-class-distinguishing-techniques not explored before the initial classifications?
> Richard Montgomery
>
>
> ----- Original Message ----- From: "Jeff Grossman" <jngrossman at gmail.com>
> To: <Meteorite-list at meteoritecentral.com>
> Sent: Wednesday, March 06, 2013 3:28 PM
> Subject: Re: [meteorite-list] finally: L3.00
>
>
>> There are actually many carbonaceous chondrites that have experienced, most likely, less heating than Semarkona. That includes nearly every CR and most CM chondrites. Semarkona's reign is over the OC kingdom.
>>
>> Jeff
>>
>> Sent from my iPad
>>
>> On Mar 6, 2013, at 4:22 PM, Greg Hup? <gmhupe at centurylink.net> wrote:
>>
>>> ......
>>> And lets not forget NWA 5958, the Ungrouped Carbonaceous Chondrite that we believe met and exceeded the markers for the fabled "Perfect 3.00"
>>> http://www.lpi.usra.edu/meetings/lpsc2011/pdf/2343.pdf
>>>
>>> To see some of this incredible meteorite, click here with confidence:
>>> http://www.naturesvault.net/meteorites/nwa5958.html
>>>
>>> Best Regards,
>>> Greg
>>>
>>> ====================
>>> Greg Hup?
>>> The Hup? Collection
>>> gmhupe at centurylink.net
>>> www.NaturesVault.net (Online Catalog & Reference Site)
>>> www.LunarRock.com (Online Planetary Meteorite Site)
>>> NaturesVault (Facebook, Pinterest & eBay)
>>> http://www.facebook.com/NaturesVault
>>> http://pinterest.com/NaturesVault
>>> IMCA 3163
>>> ====================
>>> Click here for my current eBay auctions:
>>> http://search.ebay.com/_W0QQsassZnaturesvault
>>>
>>>
>>>
>>> -----Original Message----- From: Rob Lenssen
>>> Sent: Wednesday, March 06, 2013 1:16 PM
>>> To: Meteorite-list at meteoritecentral.com
>>> Subject: [meteorite-list] finally: L3.00
>>>
>>> Finally an L3.00:
>>>
>>> http://www.lpi.usra.edu/meteor/metbull.php?code=57162
>>>
>>> Would love to see a photo!
>>>
>>> Rob Lenssen
>>> www.AsteroidChippings.com
>>>
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Received on Thu 07 Mar 2013 12:21:32 AM PST