[meteorite-list] Czech meteorite fragments 20 years

From: Mark Bowling <minador_at_meteoritecentral.com>
Date: Thu, 16 Oct 2014 10:49:11 -0700
Message-ID: <1413481751.25123.YahooMailBasic_at_web160402.mail.bf1.yahoo.com>

Thanks Carl I see that others have commented too. I wrote last night but didn't execute until today.

I hope to hear more soon.? Pretty interesting topic.:-)
Regards,
Mark


???From:"Carl Esparza via
 Meteorite-list"
 <meteorite-list at meteoritecentral.com>
 Date:Thu, Oct 16, 2014 at 7:23 AM
 Subject:Re: [meteorite-list] Czech meteorite
 fragments 20 years
 
 
 Hi Mark,
 These
 guys are legit.
 http://cs.wikipedia.org/wiki/Pavel_Spurn%C3%BD
 Hope all is well with you.
 Carl
 Meteoritemax
 
 --
 Love &
 Life
 
 ---- Mark Bowling via
 Meteorite-list <meteorite-list at meteoritecentral.com>
 wrote:
> Just to play Devil's
 advocate, is this desert varnish,
? or some kind of reaction to a humid, heavily mineralized
 soil?? Have they been shared with other institutions??
 It's implied that they were found buried in the
 ground.? Perhaps they did find them, and it's some sort
 of alteration caused by local ard/gossan conditions.
 
 Any geos on there who might
 know of a mechanism that could cause a similar looking
 weathering product?? These are just photos, which, more
 often than not, are very hard to interpret.? I'm partly
 curious as I've observed some interesting rocks while
 prospecting high sulfide locations.
 
 Assuming they were genuinely found, in such
 conditions it may be possible they are 20 years old.? Or
 they could be much older, and it's just chance that they
 found some very old, highly-weathered meteorites unrelated
 to their "impact location".? In such a case, is
 there a dating method that could determine their true
 terrestrial age?
 
 Yes
 Holbrooks are
? pretty fresh, but they are in a semi-arid location, in sand
 dunes which probably wick away moisture.? Stones found in
 the dunes are very fresh, while some in the flats are a lot
 more rusty.
 
 Anne brings up
 a good point that diverse types can be found from one
 event.? I'm not saying that she agrees - odds are they
 are planted.? But I just want to keep an open mind and keep
 asking questions.
 
 Another
 possibility is that one or two team members planted them and
 kept other members in the dark. They may have documented
 removal of the last couple found, thus adding more
 "evidence" that they are legit.? But while they
 selected similar looking stones, they actually were
 different types (?).
 
 Anybody know some of these team members and if
 they are qualified to do this sort of work/have good
 reputations?? Is this peer reviewed?
 
 Odds are they are kooks or cheats.? But maybe
 they are on the up and up, but
? simply have foolishly linked these "finds" to a
 relatively recent fall(???).
 
 It will be interesting to see what develops!
 
 Mark Bowling
 
 
 
 
 
 ________________________________
 From: Michael Farmer via Meteorite-list <meteorite-list at meteoritecentral.com>
 To: Paul Gessler <cetuspa at shaw.ca>
 Cc:
 meteorite-list <meteorite-list at meteoritecentral.com>;
 MEM <mstreman53 at yahoo.com>
 Sent: Wednesday, October 15, 2014 5:13 PM
 Subject: Re: [meteorite-list] Czech meteorite
 fragments 20 years
 
 
 Not to mention they are highly desert
 varnished, something never seen in a wet place, and
 different
? types.
 Whoever pulled this scam is pretty
 foolish.
 Michael Farmer
 
 Michael Farmer
 
> On Oct 15, 2014, at 5:02 PM, Paul Gessler
 via Meteorite-list <meteorite-list at meteoritecentral.com>
 wrote:
>
> Looks like
 something that was found sitting in a Moroccan sale bin for
 the last 20 years.
> They look a lot
 older than 20 years to me.
>
> Paul G
>
>
> -----Original
 Message----- From: MEM via Meteorite-list
> Sent: Wednesday, October 15, 2014 4:53
 PM
> To: Meteorite Mailing List
> Subject: [meteorite-list] Fw: [Geology2]
 Meteorite fragments discovered 20years after bolide event in
 Czech Republic
>
>
 
>
 <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>.
>
>
>
> .
>
> __,_._,___
>
 ______________________________________________
>
> Visit the Archives
 at http://www.meteorite-list-archives.com
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> https://pairlist3.pair.net/mailman/listinfo/meteorite-list
>
>
> -----
> No virus found
 in this message.
> Checked by AVG -
 www.avg.com
> Version: 2012.0.2247 /
? Virus Database: 4031/7891 - Release Date: 10/15/14
 
 
 
>
 ______________________________________________
>
> Visit the Archives
 at http://www.meteorite-list-archives.com
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> https://pairlist3.pair.net/mailman/listinfo/meteorite-list
 ______________________________________________
 
 Visit the Archives at http://www.meteorite-list-archives.com
 Meteorite-list mailing list
 Meteorite-list at meteoritecentral.com
 https://pairlist3.pair.net/mailman/listinfo/meteorite-list
 ______________________________________________
 
 Visit the Archives at http://www.meteorite-list-archives.com
 Meteorite-list mailing list
 Meteorite-list at meteoritecentral.com
 https://pairlist3.pair.net/mailman/listinfo/meteorite-list
 
 ______________________________________________
 
 Visit the Archives at http://www.meteorite-list-archives.com
 Meteorite-list mailing list
 Meteorite-list at meteoritecentral.com
 https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Received on Thu 16 Oct 2014 01:49:11 PM PDT