[meteorite-list] Meteor shower meteorite dropping events

From: lebofsky at lpl.arizona.edu <lebofsky_at_meteoritecentral.com>
Date: Thu, 12 Aug 2010 04:58:48 -0700 (MST)
Message-ID: <a01100084be0fea97449903e02f215fb.squirrel_at_webmail.lpl.arizona.edu>

Jeff:

Why would you expect cometary dust particles to look like CIs. CIs are
aqueously altered, and there is little indication that this would happen
on a comet (though there were possible observations of this from some Deep
Impact observations). You need a good deal of heating, enough to melt ice
so that the water can alter the silicates.

Interplanetary Dust Particles (IDPs) which are found mostly high in the
atmosphere, are not aqueously altered and are thought to be derived from
comets.

Larry


> I remember when the first results from the Stardust mission were coming
> out.
> Everyone was surprised to see the the CI chondrites did not match as well
> as
> first thought and that the best match were the metal-rich CH chondrites.
> I'm
> not sure what the studies have shown since then but maybe someone else
> here
> knows of recent papers?
>
> Cheers,
>
> Jeff
>
>
> ----- Original Message -----
> From: "Sterling K. Webb" <sterling_k_webb at sbcglobal.net>
> To: <meteorite-list at meteoritecentral.com>
> Cc: <cspratt at islandnet.com>
> Sent: Thursday, August 12, 2010 4:01 PM
> Subject: Re: [meteorite-list] Meteor shower meteorite dropping events
>
>
>> Chris, Eric, List,
>>
>> Mazapil is a very old argument, indeed.
>>
>> Take a look at:
>> http://articles.adsabs.harvard.edu/full/2002M%26PS...37..649B
>> or the same at the author's website:
>> http://hyperion.cc.uregina.ca/~astro/Mazapil.pdf
>>
>> and this one:
>> http://www.lpi.usra.edu/meetings/lpsc1987/pdf/1377.pdf
>>
>> Personally, the idea that comets drop iron meteorites
>> is silly. The fact that this is the one and only example, out
>> of thousands of falls, of the coinciding of a meteorite
>> fall with a meteor shower suggests to me that when you
>> flip coins often enough, a coin will land on its edge.
>>
>>
>> Sterling K. Webb
>> ---------------------------------------------------------------------------
>> ----- Original Message -----
>> From: "Meteorites USA" <eric at meteoritesusa.com>
>> To: <meteorite-list at meteoritecentral.com>
>> Sent: Wednesday, August 11, 2010 11:34 PM
>> Subject: Re: [meteorite-list] Meteor shower meteorite dropping events
>>
>>
>>> Thanks for posting this Chris... This sounds like a good topic for an
>>> article for my magazine. If you're interested in it, and/or would like
>>> to
>>> write for the mag on this topic let me know. Anyone have a working
>>> theory
>>> based on evidence of this associative phenomena? I've heard many people
>>> suggest that meteor showers don't drop meteorites. Then I've heard
>>> people
>>> associate meteorite falls that happen during meteor showers with said
>>> shower. And I've also heard that people believe that there is ZERO
>>> connection and it's purely coincidence.
>>>
>>> So which is it? yay or nay, or maybe? or no one really knows...?
>>>
>>> Eric
>>>
>>>
>>>
>>> On 8/11/2010 8:59 PM, Chris Spratt wrote:
>>>> I know of one meteor shower (November Andromedids) where an iron
>>>> meteorite fell in Mazapil, Mexico during the shower.
>>>>
>>>> Are there any similar events?
>>>>
>>>> Chris Spratt
>>>> Victoria, BC
>>>> (Via my iPhone)
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>
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Received on Thu 12 Aug 2010 07:58:48 AM PDT