[meteorite-list] Near pure Olivine Meteorite

Wed Jan 15 11:22:35 EST 2014

Hi All,
Bad image but you can get an idea. Olivine volcanic bomb:
http://sv-meteorites.com/gallery/olivine.jpg
Can make a better image tomorrow on a sun light.
Sergey

On Wed, Jan 15, 2014 at 5:11 PM, Galactic Stone & Ironworks
<meteoritemike at gmail.com> wrote:
> Hi Greg and List,
>
> Lava bombs are beautiful if prepared properly.  I had some a couple of
> years ago.  I sliced them thinly and polished them.  They were
> translucent and very pretty when backlit.  Of course, the material was
> friable and more than one slice broke during preparation.  But it was
> worth the trouble.
>
> Best regards and Happy Huntings,
>
> MikeG
>
>
> On 1/15/14, Greg Hupé <gmhupe at centurylink.net> wrote:
>> Hi Jim,
>>
>> Here is a good read about a volcanic maar crater in New Mexico that
>> deposited peridotite/olivine bearing lava 'bombs' with crustal/mantle
>> xenoliths. It is a great site to visit, went there in 2007 with a group of
>> friends and collected many specimens.
>> http://geoinfo.nmt.edu/tour/landmarks/kilbourne_hole/home.html
>>
>> Best Regards,
>> Greg
>>
>> ====================
>> Greg Hupé
>> The Hupé 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:
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>>
>>
>>
>> -----Original Message-----
>> From: Jim Wooddell
>> Sent: Wednesday, January 15, 2014 10:16 AM
>> To: meteorite-list at meteoritecentral.com
>> Subject: Re: [meteorite-list] Near pure Olivine Meteorite
>>
>> Thank you all for your comments!
>>
>> I am not sure either that ablation would be a huge factor in why we are
>> not finding olivine meteorites.  The mean melting is about 3100 degrees
>> F (Fo = ~3450F, Fs =~2752), I think.  I suppose, if I look at the
>> earth's mantle, olivine is a primary mineral but even then, I do not
>> find large chunks just laying around waiting to be found.  My thinking
>> is that if it is such a primary mineral, we should see more, not knowing
>> the factors that completely effect it.
>>
>> Jim
>>
>>
>>
>> On 1/14/2014 10:25 PM, Alan Rubin wrote:
>>> Iron meteorites tend to break up in the atmosphere at lower depths than
>>> stony meteorites, so I suppose that pallasites would also be better able
>>> to survive transit through the Earth's atmosphere than dunites.  But I am
>>>
>>> guessing that very few dunites ever make it to the top of the Earth's
>>> atmosphere to begin with.
>>>
>>>
>>> Alan Rubin
>>> Institute of Geophysics and Planetary Physics
>>> University of California
>>> 3845 Slichter Hall
>>> 603 Charles Young Dr. E
>>> Los Angeles, CA  90095-1567
>>> phone: 310-825-3202
>>> e-mail: aerubin at ucla.edu
>>> website: http://cosmochemists.igpp.ucla.edu/Rubin.html
>>>
>>>
>>> ----- Original Message ----- From: <pshugar at messengersfromthecosmos.com>
>>> To: "Alan Rubin" <aerubin at ucla.edu>; "Jim Wooddell"
>>> <jim.wooddell at suddenlink.net>; <meteorite-list at meteoritecentral.com>
>>> Sent: Tuesday, January 14, 2014 5:27 PM
>>> Subject: RE: [meteorite-list] Near pure Olivine Meteorite
>>>
>>>
>>> Would they also melt or more correctly ablate off material faster and
>>> more completely
>>> upon entering the earth's atmosphere?
>>> Pete
>>>
>>>
>>>> -------- Original Message --------
>>>> Subject: Re: [meteorite-list] Near pure Olivine Meteorite
>>>> From: "Alan Rubin" <aerubin at ucla.edu>
>>>> Date: Tue, January 14, 2014 6:54 pm
>>>> To: "Jim Wooddell" <jim.wooddell at suddenlink.net>,
>>>> <meteorite-list at meteoritecentral.com>
>>>>
>>>>
>>>> The question of the dearth of olivine meteorites (asteroidal dunites)
>>>> has
>>>> been around for a very long time.  Most folks have ascribed this paucity
>>>>
>>>> as
>>>> being due to the brittle nature of olivine meteorites relative to
>>>> pallasites.  Pallasites have relatively long cosmic-ray-exposure ages
>>>> indicating that they can survive the rigors of interplanetary space for
>>>> a
>>>> rather long while.  Eucrites have much shorter CRE ages on average.
>>>> This
>>>> suggests that if asteroidal dunites are from deep in the mantle, they
>>>> would
>>>> be in space about as long as the pallasites and not survive because they
>>>>
>>>> are
>>>> no tougher than eucrites.
>>>> Alan
>>>>
>>>>
>>>> Alan Rubin
>>>> Institute of Geophysics and Planetary Physics
>>>> University of California
>>>> 3845 Slichter Hall
>>>> 603 Charles Young Dr. E
>>>> Los Angeles, CA  90095-1567
>>>> phone: 310-825-3202
>>>> e-mail: aerubin at ucla.edu
>>>> website: http://cosmochemists.igpp.ucla.edu/Rubin.html
>>>>
>>>>
>>>> ----- Original Message ----- From: "Jim Wooddell"
>>>> <jim.wooddell at suddenlink.net>
>>>> To: <meteorite-list at meteoritecentral.com>
>>>> Sent: Tuesday, January 14, 2014 4:05 PM
>>>> Subject: [meteorite-list] Near pure Olivine Meteorite
>>>>
>>>> > ______________________________________________ -----
>>> No virus found in this message.
>>> Checked by AVG - www.avg.com
>>> Version: 2014.0.4259 / Virus Database: 3658/7003 - Release Date: 01/14/14
>>>
>>>
>>
>>
>> --
>> Jim Wooddell
>> jim.wooddell at suddenlink.net
>> http://pages.suddenlink.net/chondrule/
>>
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