[meteorite-list] A Heads-Up: Another important article on Carancas in MAPS 44-12, 2009

From: Greg Catterton <star_wars_collector_at_meteoritecentral.com>
Date: Wed, 24 Mar 2010 16:17:48 -0700 (PDT)
Message-ID: <708877.56672.qm_at_web46410.mail.sp1.yahoo.com>

There was a recent report that explained several items you mentioned.
I dont have a link to it at the moment, but I am sure someone on the list knows what Im talking about who has the info available. If not, I will post it later on.


Greg Catterton
www.wanderingstarmeteorites.com
IMCA member 4682
On Ebay: http://stores.shop.ebay.com/wanderingstarmeteorites


--- On Wed, 3/24/10, Galactic Stone & Ironworks <meteoritemike at gmail.com> wrote:

> From: Galactic Stone & Ironworks <meteoritemike at gmail.com>
> Subject: Re: [meteorite-list] A Heads-Up: Another important article on Carancas in MAPS 44-12, 2009
> To: "tett" <tett at rogers.com>
> Cc: bernd.pauli at paulinet.de, Meteorite-list at meteoritecentral.com
> Date: Wednesday, March 24, 2010, 7:14 PM
> Hi Bernd and List,
>
> Another key finding in the paper is that the altitude of
> the impact
> site had little effect on the formation of the
> crater.? There are
> still unanswered questions as to why Carancas did not
> behave the way
> it should have, based on it's composition, velocity and
> trajectory.
> We should be thankful that whatever forces caused the
> crater are not
> at play with every OC fall.
>
> Best regards,
>
> MikeG
>
>
> On 3/24/10, tett <tett at rogers.com>
> wrote:
> > Bernd,
> >
> > It is GOOD to have you back on the list!
> >
> > Mike
> >
> >
> >
> > bernd.pauli at paulinet.de
> wrote:
> >> TANCREDI G. et al. (2009) A meteorite crater on
> Earth formed
> >> on September 15, 2007: The Carancas hypervelocity
> impact
> >> (MAPS 44-12, 2009, pp. 1967-1984).
> >>
> >> Some of the key results the authors present:
> >>
> >> - initial mass 7-12 metric tons
> >> - initial diameter 1.6-2 meters
> >> - initial velocity 12-17 km/s
> >> - initial kinetic energy 0.12-0.41 kT TNT
> >> - trajectory roughly east-west
> >> - height above the horizon 45-60?
> >> - orbit of known near-Earth asteroids
> >> - impact time 16:40:14.4 UT
> >> - crater dimensions: 13.5 m (rim to rim)
> >> - depth to diameter ratio ca. 0.2 (typical of
> impact craters)
> >> - meteorites collected inside and outside the
> crater
> >> - classification H4-5
> >> - peak pressures at impact over several GPa
> >> - impact velocity on the ground > ca. 3 km/s
> but < 6 km/s
> >> - hypervelocity impact event (impact speed larger
> than the
> >>???speed of sound in the target
> material)
> >> - significant ablation but no catastrophic
> disruption during
> >>???atmospheric passage
> >> - mass on impact 0.3-3 tons / diameter 0.6-1.1 m
> >>
> >> Best wishes,
> >>
> >> Bernd
> >>
> >> ______________________________________________
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> >>
> >>
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>
> --
> ------------------------------------------------------------
> Mike Gilmer - Galactic Stone & Ironworks Meteorites
> http://www.galactic-stone.com
> http://www.facebook.com/galacticstone
> ------------------------------------------------------------
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Received on Wed 24 Mar 2010 07:17:48 PM PDT