...@yahoo.com; meteorite-list@meteoritecentral.com
Sent: Friday, October 02, 2009 1:51 PM
Subject: Re: [meteorite-list] Chondrule formation
Hello All:
I had a thought:
It seems to me that chondrules are prevalent in meteorites blasted from
asteroidal bodies and not from planetary bodies
Hi all -
We don't know crap... Hey!, who stole my line?
But that's okay, I can come up with another one:
We don't know crap about the impact hazard,
and NASA senior managers know less than that.
E.P. Grondine
Man and Impact in the Americas
To: meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Chondrule formation
Hi all -
We don't know crap... Hey!, who stole my line?
But that's okay, I can come up with another one:
We don't know crap about the impact hazard,
and NASA senior managers know less than that.
E.P
To: epgrond...@yahoo.com=3b meteorite-list@meteoritecentral.com
Date: Fri=2C 2 Oct 2009 13:51:29 -0700
Subject: Re: [meteorite-list] Chondrule formation
Hello All:
I had a thought:
It seems to me that chondrules are prevalent in meteorites blasted from a=
steroidal bodies and not from planetary
Hi list, Sorry for this lame post. I recently received an email from a
list member that for some reason went to my spam folder. I accidentally hit
the
delete all button and I can't get it back at all. I never opened it and I
didn't see who it was from.
Please send it again if it was
Hi List, A very interesting post. It seems electrical discharge is being
seen as not likely for chondrule formation.
I have seen chondrules with many types of structures that seem to defy the
conventional view of shock wave formation. Some have intertwined tubular
features that resemble
For the full PDF file:
http://eprintweb.org/S/article/astro-ph/0712.0561
http://eprintweb.org/S/article/astro-ph/0712.0561
arXiv:0712.0561 (December 2007)
Exposing metal and silicate charges to electrical discharges: Did chondrules
form by nebular lightning?
Pete [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com
Sent: Wednesday, October 25, 2006 2:52 PM
Subject: RE: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
I suppose you are correct. I suspect the iron flecks
in chondrites must be stellar relics.
The iron is formed
PM
Subject: RE: Re : [meteorite-list] Chondrule
formation mechanism (Info
Please)
I suppose you are correct. I suspect the iron
flecks
in chondrites must be stellar relics.
The iron is formed in the cores of all stars.
Nuclearly speaking it is the stablest of all
elements
(lowest
.
Jerry Flaherty
- Original Message -
From: Sterling K. Webb [EMAIL PROTECTED]
To: meteorite-list@meteoritecentral.com
Cc: E.P. Grondine [EMAIL PROTECTED]
Sent: Friday, October 27, 2006 2:30 AM
Subject: Re: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
Hi, Rob, Pete, Ed
. Grondine [EMAIL PROTECTED]
Subject: Re : [meteorite-list] Chondrule formation mechanism (Info Please)
Date: Tue, 24 Oct 2006 16:15:53 + (GMT)
Hi, all,
I am surprised that nobody evoked the theory following which chondrules were
formed in relatively very few privileged zones of space. They would
On Wed, 25 Oct 2006 11:52:23 -0400, you wrote:
If the heavy elements, such as nickel and iron, are created by a supernova,
and the chondrules are in theory formed much later during the future
dynamics of our solar system's nebula, would it be fair to say that the
metal flecks would be billions
: Re: RE: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
Date: Wed, 25 Oct 2006 12:55:53 -0400
On Wed, 25 Oct 2006 11:52:23 -0400, you wrote:
If the heavy elements, such as nickel and iron, are created by a
supernova,
and the chondrules are in theory formed much later during
PROTECTED]
CC: meteorite-list@meteoritecentral.com
Subject: Re: RE: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
Date: Wed, 25 Oct 2006 12:55:53 -0400
On Wed, 25 Oct 2006 11:52:23 -0400, you wrote:
If the heavy elements, such as nickel and iron, are created by a
supernova
. Grondine [EMAIL PROTECTED]
Subject: Re : [meteorite-list] Chondrule formation
mechanism (Info Please)
Date: Tue, 24 Oct 2006 16:15:53 + (GMT)
Hi, all,
I am surprised that nobody evoked the theory
following which chondrules were
formed in relatively very few privileged zones of
space
3:25 PM
Subject: Re: [meteorite-list] Chondrule formation
mechanism (Info Please)
Hi Sterling,
If the dates are right, the problem becomes how
did
that many identical atoms get together in one
place so
that the chondrules could form?
Since this question has
I like this theory very much. (I particularly like it
because it allows the structure to form the way i
described it)
Rob McC
--- Mr EMan [EMAIL PROTECTED] wrote:
I think crystal formation in a fluid preceded the
choundrule formation. Seems standard mineralogy and
crystalography answer
Hi Rob -
molecules of a feather flock together? why?
If they did, then say an initial detonation of our sun
could have been the heat which fused them together. I
think speculation on this kind of blast has been
bandied about much recently.
good hunting,
Ed
--- Rob McCafferty [EMAIL
-
From: Warin Roger
To: Sterling K. Webb ; meteorite-list@meteoritecentral.com
Cc: E.P. Grondine
Sent: Tuesday, October 24, 2006 11:15 AM
Subject: Re : [meteorite-list] Chondrule formation mechanism (Info Please)
Hi, all,
I am surprised that nobody evoked the theory following which
@meteoritecentral.com
Cc: E.P. Grondine
Sent: Tuesday, October 24, 2006 11:15 AM
Subject: Re : [meteorite-list] Chondrule formation mechanism (Info Please)
Hi, all,
I am surprised that nobody evoked the theory following which chondrules
were formed in relatively very few privileged zones of space
--- E.P. Grondine [EMAIL PROTECTED] wrote:
Hi Rob -
molecules of a feather flock together? why?
This is the most blatant speculation on my part and I
have not looked it up to check this (though to be
fair, I didn't make the comment above, I just like it)
but this is what I think and no
[EMAIL PROTECTED]
To: Sterling K. Webb
[EMAIL PROTECTED]
Sent: Monday, October 23, 2006 3:25 PM
Subject: Re: [meteorite-list] Chondrule formation
mechanism (Info Please)
Hi Sterling,
If the dates are right, the problem becomes how
did
that many identical atoms get together in one
--- E.P. Grondine [EMAIL PROTECTED] wrote:
The problem still remains what caused sufficient
number of atoms of the same type to be in the same
place at the same time to produce the crystals and
glasses observed.
I think crystal formation in a fluid preceded the
choundrule formation. Seems
Ed
Thanks for the reply. I'd really like to take a look
at any data but to help be more specific on my
requirements I'll give you an outline on my idea.
The appearance of the unaltered chondrites seems to
show that the outer rim of the chondrules are of a
significantly diferent structure to the
Hi Rob -
You noticed the contradiction in cooling periods as
well.
What I am thinking is that there was at least one
larger parent body which was disrupted about 3.9 Gya
(at time of LPBE). When this larger parent body was
disrupted, then the effervescent foaming that led
to some chondrules
PROTECTED]
To: meteorite-list@meteoritecentral.com
Sent: Sunday, October 22, 2006 10:24 AM
Subject: Re: [meteorite-list] Chondrule formation mechanism (Info Please)
Hi Rob -
You noticed the contradiction in cooling periods as
well.
What I am thinking is that there was at least one
larger parent
Right here on Earth, we have good demonstrations of effervescence in rocks.
Every time we get fire fountaining from one of our volcanoes, it is caused
by a large amount of gas dissolved under pressure at depth in the magma.
When the pressurized magma (now lava) reaches sufficiently shallow
Hi all -
I think I would be right in saying that the usual
mechanism proposed for chondrule formation is
precipitation at low temperatures over time.
But I am wondering: could chondrule formation be
linked to the release of pressure? Could it be like a
soda-pop, where when you take the cap off
On Sat, 21 Oct 2006 10:12:56 -0700 (PDT), you wrote:
I think I would be right in saying that the usual
mechanism proposed for chondrule formation is
precipitation at low temperatures over time.
No, actually it isn't. Chondrules are usually proposed to be products of rapid
melting.
Hi Darren -
Thanks - much has been lost in the stroke. I also seem
to remember a long slow cooling involved in
chondrule formation -
I am thinking that effervescence following a sudden
release of pressure might be a better process
description -
good hunting,
Ed
--- Darren Garrison [EMAIL
On Sat, 21 Oct 2006 14:58:23 -0700 (PDT), you wrote:
Hi Darren -
Thanks - much has been lost in the stroke. I also seem
to remember a long slow cooling involved in
chondrule formation -
Googling chondrule formation comes up with lots of stuff, much of it pretty
densly technical. Here's
Thanks Darren -
now this is more like it - h
--- Darren Garrison [EMAIL PROTECTED] wrote:
http://www.aspbooks.org/custom/publications/paper/index.phtml?paper_id=2447
Chondrule textures depend on the extent of melting
of the chondrule precursor- material when cooling
starts.
Kind of
On Sat, 21 Oct 2006 16:41:48 -0700 (PDT), you wrote:
Chondrule textures depend on the extent of melting
of the chondrule precursor- material when cooling
starts.
Kind of begs the question - chodrules formed by
collision, which causes melt - consider if one started
from a steady molten state
Hi list
What I have ben able to find personally on chondrule
formation is rather sketchy.
Even the otherwise comprehensive Encyclopedia of
Meteorites by O. Richard Norton seems to skim over the
mechanism in a paragraph. It's almost as if there is
something which defies explanation and
jeez Bob,
and all I was trying to do was to come up with a good
excuse to personally examine that Krasnojarsk RSPOD
Oct 15.
You're just about ready to handle some of my asteroid
and comet impact correspondence.
Ed
--- Rob McCafferty [EMAIL PROTECTED] wrote:
Hi list
What I have ben able
Howdy
My impression upon seeing this meteorite isn't that it necessarily
accreted quickly, but that it accreted in an environment that lacked
smaller particles. With no small bits scattered about, there was no
material to make up the typical matrix. Alternatively, even if it
accreted quickly
G'day List,
I was just reading through a section of 'Planetary Materials - Reviews in
Mineralogy, Volume 36' regarding Chondrules when one particular sentence
stuck out. It says:
A transient heating event melted the dustballs, and they were subsequently
cooled, initially at rates around hundreds
Hi All
I came across this website.
http://www.ciw.edu/desch/SLIDES/gordon/index.html
I find it very informative, and
interesting.
Have a look, and think some big thoughts
:-)
Best
Lars
Hello Everyone,
Nice collection of papers dealing with the
formation of
chondrules in meteorites:
http://ads.harvard.edu/books/chto/
BTW, I am now selling smaller slices of NWA
482
(lunar meteorite) for half their usual asking
price.
http://branchmeteorites.com/sale/salenwa482.html
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