[meteorite-list] Fw: [Geology2] Meteorite fragments discovered 20 years after bolide event in Czech Republic

From: Anne Black <*impactika_at_meteoritecentral.com*> Date: Wed, 15 Oct 2014 20:56:06 -0400 Message-ID: <8D1B6F319457C28-730-2E61D_at_webmail-m263.sysops.aol.com> · impactika_at_meteoritecentral.com

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On 10/15/14, Anne Black <impactika at aol.com> wrote:
> Not necessarily.
> For instance:  All kinds of different lithologies in Almahata Sitta.
>
>
> Anne M. Black
> www.IMPACTIKA.com
> IMPACTIKA at aol.com
>
>
> -----Original Message-----
> From: Galactic Stone & Ironworks <meteoritemike at gmail.com>
> To: Anne Black <impactika at aol.com>
> Cc: mike <mike at meteoriteguy.com>; mstreman53 <mstreman53 at yahoo.com>;
> meteorite-list <meteorite-list at meteoritecentral.com>
> Sent: Wed, Oct 15, 2014 6:30 pm
> Subject: Re: [meteorite-list] Fw: [Geology2] Meteorite fragments
> discovered 20 years after bolide event in Czech Republic
>
>
> Another red flag - two different types in the same fall.  An H5 and an
> LL3.5 would suggest two different parent bodies.
>
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>
> On 10/15/14, Anne Black via Meteorite-list
> <meteorite-list at meteoritecentral.com> wrote:
>> You could also compare them to Holbrooks, still found 100+ years 
after
>> the fall.
>> And No, they don't look right.
>> Not buying either.
>>
>>
>> Anne M. Black
>> www.IMPACTIKA.com
>> IMPACTIKA at aol.com
>>
>>
>> -----Original Message-----
>>  From: Michael Farmer via Meteorite-list
>> <meteorite-list at meteoritecentral.com>
>> To: MEM <mstreman53 at yahoo.com>
>> Cc: Meteorite Mailing List <meteorite-list at meteoritecentral.com>
>> Sent: Wed, Oct 15, 2014 5:55 pm
>> Subject: Re: [meteorite-list] Fw: [Geology2] Meteorite fragments
>> discovered 20 years after bolide event in Czech Republic
>>
>>
>> Sorry but fake as crap, clearly ancient NWA meteorite. Pultusk stones
>> are still
>> being 150 years after the fall and they don't even look hardly
> weathers
>> at all,
>> same wet climate.
>> Sorry but I call a scam,
>> Michael Farmer
>>
>> Sent from my iPad
>>
>>> On Oct 15, 2014, at 4:53 PM, MEM via Meteorite-list
>> <meteorite-list at meteoritecentral.com>
>> wrote:
>>>
>>>
>>> <www.sciencedaily.com/releases/2014/10/141014142736.htm>
>>>
>>> Meteorite fragments discovered 20 years after bolide event in Czech
>> Republic
>>> Date: October 14, 2014
>>> Source: Astronomy & Astrophysics
>>> Summary: Scientists have discovered meteorite fragments 20 years
>> after the
>> corresponding bolide
>>> was seen in the skies of the Czech Republic. This discovery was made
>> possible
>> by reanalyzing the trajectory, which moved the impact line by 330
>> meters.
>> Interestingly, the meteorites found on the ground are of
>>> different types, pointing to a parent asteroid of heterogeneous
>> composition.
>>>
>>>
>>>
>>> ________________________________
>>>
>>>
>>> First three Bene?ov meteorites found in April 2011, with metal
>> detectors. From
>> left to
>>> right: H5 chondrite of 1.56 g, LL3.5 chondrite of 7.72 g with
>> achondrite
>> clast, and LL3.5 chondrite of 1.99 g [2].
>>> Credit: Image courtesy of Astronomy & Astrophysics
>>>
>>>
>>> Astronomy & Astrophysics is publishing the spectacular discovery of
>> meteorite
>> fragments 20 years after the corresponding bolide was seen in the
> skies
>> of the
>> Czech
>>> Republic. This discovery was made possible by reanalyzing the
>>> trajectory, which moved the impact line by 330 meters. 
Interestingly,
>>> the meteorites found on the ground are of different types, pointing
>> to a
>> parent asteroid of heterogeneous composition.
>>> Collisions of meter-sized meteoroids with Earth's atmosphere are
>>> relatively rare, occurring about 40 times a year. They cause very
>>> spectacular events, known as superbolides. One of the best known 
such
>>> events, the Bene?ov bolide, occurred on 7 May 1991 at 23h 03m 46s UT
>>> over the Czech Republic. It was recorded during systematic
>> photographic
>>> observations by the European Fireball Network and certainly ended in
>> a
>>> multiple meteorite fall, but no meteorite was found in the weeks and
>>> years after the fall, despite many attempts.
>>> In February 2011, nearly 20 years after the event, P. Spurn? and his
>>> colleagues [1] measured the records again and analyzed the data with
>>> improved methods. This led to a new picture of the whole event with 
a
>>> revised atmospheric trajectory and a new impact location. This
>> allowed
>>> the team to recover the Bene?ov meteorites, 20 years after the fall,
>>> exactly in the newly predicted area. It is the first time a 
meteorite
>> is found
>> so long after the bolide observation.
>>> The team found four small, highly-weathered meteorites with a total
>>> mass of 12 g. The probability that these four fragments come from
>>> different meteoroids and were found by chance at the same place is
>>> estimated to be 1 in 100,000 or less. Even more interestingly, these
>>> four meteorites are of three different mineralogical types. This
>> means
>>> that the Bene?ov meteoroid was heterogeneous and contained at least
>>> three different types of material. After the Almahata Sitta fall,
>> this
>>> is the second time that such a heterogeneous composition has been
>> found. It
>> raises the possibility that a significant fraction of all asteroids
>>> are heterogeneous and that they were strongly reprocessed by
>> collisions
>>> with other asteroids in the main belt.
>>> ________________________________
>>>
>>> Story Source:
>>> The above story is based on materials provided by Astronomy &
>> Astrophysics.
>> Note: Materials may be edited for content and length.
>>> ________________________________
>>>
>>> Journal Reference:
>>>    1. Pavel Spurn?, Jakub Haloda, Ji?? Borovi?ka, Luk?? Shrben?,
>> Patricie
>> Halodov?. Reanalysis of the Bene?ov bolide and recovery of polymict
>> breccia
>> meteorites ? old mystery solved after 20 years. Astronomy &
>> Astrophysics, 2014;
>> 570: A39 DOI: 10.1051/0004-6361/201424308
>>> ________________________________
>>>
>>>
>>> Astronomy & Astrophysics. "Meteorite fragments discovered 20 years
>> after
>>> bolide event in Czech Republic." ScienceDaily. ScienceDaily, 14
>> October
>>> 2014. <www.sciencedaily.com/releases/2014/10/141014142736.htm>.
>>>
>>>
>>>
>>> .
>>>
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