It would have a cosmic-ray exposure age of 4.4 billion years. No iron
meteorite has a CRE age anywhere near that.
On Tue, Jul 25, 2023, 1:32 PM Alfredo Petrov via Meteorite-list <
meteorite-list@meteoritecentral.com> wrote:
> There could be pieces of iron from Earth's core floating around the
I am really surprised that a press release was issued on work that has not
even been submitted for peer-reviewed publication. There seems to be no age
data, no bulk chemical data, and no shock data. The authors seem to claim
it was launched off Earth just 10,000 years ago, but I don't know where
tor, Institute of Meteoritics
> Professor, Earth and Planetary Sciences
> University of New Mexico
>
> Shipping Address:
> 11 Atole Way
> Placitas, NM 87043
>
> (505) 750-7172
> (505) 573-5131
> Email: cb.a...@gmail.com
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> On Wed, Jul 1
net/mailman/listinfo/meteorite-list
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Of course, you could send an email to Gary Huss.
On Wed, Feb 16, 2022, 7:59 AM Sean T. Murray via Meteorite-list <
meteorite-list@meteoritecentral.com> wrote:
> Mendy,
>
> Many times those gaps are specimens that were sold between editions. I
> think they moved / sold some material quickly, and
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Alan Rubin
Institute of Geophysics and Planetary Physics
Department of Earth, Planetary, and Space Sciences
University of California
3845 Slichter Hall
I examine the specimens (or images of them if they do not send pieces) and
then give them my best guess as to what the sample could be. Some people
are insistent that I am wrong or that I am running some kind of a scam. I
usually continue the conversation for one or two more rounds before I give
mailing list
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Alan Rubin
Institute of Geophysics and Planet
the Bulletin, you need to
let the folks know (i.e., through Jeff Grossman) that this is warranted and
explain the reasons. Sometimes, the rock will indeed be reclassified and
sometimes it won't. It can be frustrating. I'm not familiar with Hart or
NWA 6047. You could email Tasha Dunn and ask her.
Alan Rubin
; https://pairlist3.pair.net/mailman/listinfo/meteorite-list
>
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Alan Rubin
Institute of Geophysics and Planetary Physics
Department of Earth, Planetary, and Space Sciences
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
USA
office phone: 310-
If anyone is interested, I'm ready and willing to classify the samples.
Alan Rubin
On Thu, Jan 18, 2018 at 11:24 AM, Bigjohn Shea via Meteorite-list <
meteorite-list@meteoritecentral.com> wrote:
> They found a few small specimens last I heard.
> Did they find the main mass?
>
&
If any of you want an old reference, there is an abstract by Grant from
1968:
GRANT, R. W., 1968. The occurrence of silica minerals in meteorites.
Program 31st Meeting Meteoritical Sot., Cambridge, Mass., 1968 (abstract).
Alan Rubin
On Mon, Sep 25, 2017 at 9:48 AM, André Moutinho <mo
Meteorite-list@meteoritecentral.com
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Alan Rubin
Institute of Geophysics and Planetary Physics
Department of Earth, Planetary, and Space Sciences
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA
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--
ress: aeru...@ucla.edu If you do that, please
include your name and address in the note along with the payment.
I'll sign my article and send the issue out to you.
--
Alan Rubin
Institute of Geophysics and Planetary Physics
Department of Earth, Planetary, and Space Sciences
University of Cali
misclassified.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
office phone: 310-825-3202
fax: 310-206-3051
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
, and (e) alteration of some chondrule mesostasis regions. Other
type-3 OC are more poorly studied than Semarkona and we are quite far from
creating a comprehensive alteration scheme.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young
(i.e., subjected to metamorphic heating and aqueous
alteration at the same time), that would also not be covered by such a
scheme. Fitting complex rocks into classificatory straightjackets might
obscure more than it reveals.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University
This refers to modeling, not actual observations. Gladman and Coffey (2009)
MPS 44, 285-291 calculated that Mercury ejecta could achieve independent
orbits and re-accrete to Mercury after several million years.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
Yes, the word itself refers to the meteorite (or, more properly, the
meteoroid) and an artificial body would be a spacecraft of some sort.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
that rocks blasted off of Mercury spend millions of years in
independent heliocentric orbits before accreting once again with Mercury.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
office phone
olivine grains. There are also vary rare chondrule fragments, CAI fragments
and even one CAI in CI chondrites, indicating that they are real chondrites
in terms of texture as well as composition. There is no good reason to
believe that they are from Mars.
Alan Rubin
Institute of Geophysics
NWA 8330 is a little more recrystallized than Ragland, although I concur
that they are both likely from the same parent asteroid.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310
.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
- Original Message -
From
of the
H chondrites, the original parent H chondrfite asteroid had already been
broken into several chunks, only one of which was struck at that time. The
same may be true for many kinds of meteorites.)
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845
.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
- Original Message -
From: Jim
. The
low-Ca pyroxene is heated into the protopyroxene range and then rapidly
cooled to form twinned low-Ca clinopyroxene that very much resembles the
pyroxene phenocrysts in chondrules in unequilibrated chondrites.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University
Novato is approved.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
I just lightly polish the C-coated section on a 1-µm lap and then clean it
with ethanol.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website
they are
no tougher than eucrites.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
- Original
atmosphere to begin with.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
- Original
are provided in display cases and
brochures.
Alan Rubin, the associate curator of the gallery and a researcher in UCLA's
Department of Earth, Planetary and Space Sciences, is an expert in
identifying meteorites. He receives samples every few days from people who
believe they have found
themselves with the petrographic microscope. I don't worry so
much about the fuzzy line between classification and research.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310
If the largest enstatite chondrite was ever confiscated it would be an Abee
Sieze.
Spittle dripping down the chin of a prisoner could be considered a
con-drool.
If atheists are people who don't believe in God, are achondrites meteorites
that don't believe in chondrules?
Alan Rubin
not forget that the term also refers to starfish (which are, of course,
echinoderms from the class Asteroidea).
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru
some
additional research was done on the specimen. My only interest at this
point is to receive the specimen, log it in to the UCLA collection and
inform the NOMCOM that everything is now in order. I'm not holding anything
up.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
I was informed by Laurence Garvie that they don't deal in promises. They
will approve the name only after they are notified that an actual physical
specimen of the proper mass is in the possession of a qualified institution.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
Peter informed me yesterday that some additional research is being done,
presumably on the sample that is to be donated to UCLA. If all goes
according to plan, then sometime, hopefully within the next few months,
we'll have the name approved.
Alan
Alan Rubin
Institute of Geophysics
be a great energy savings -- much less mass would have to be lifted
off the Earth.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website
/MT,
nearly two-thirds the commercial value of a chondrite according to Jeff's
calculation. I'm sure that there are philosophical implications to this,
but I'm tired and can't figure them out.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter
, others lack pyroxene, some are
coarse grained, some are fine-grained, some have a mixture of different size
grains, some include relict grains. This seems impossible to produce by the
molten planetesimal model.
Since I only have 10 fingers, I'll stop there.
Alan Rubin
Institute of Geophysics
a thousand
flowers bloom.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
) melted by heating caused by the decay of 26-Al. I am not of
these camps; it seems to me that heating of chondrites from type 3 to type 6
also results from impact heating and that the primitive achondrites formed
in an analogous way, but that is another story.
Alan
Alan Rubin
Institute
groups (e.g., HEDs, aubrites, angrites) are not important for
distinguishing chondrites from achondrites. But we are again faced with the
question of what heat source or sources caused achondrites to melt. Most
researchers would maintain that it was mainly 26-Al.
Alan Rubin
Institute
as separate
meteorites with separate numbers and let the pairing be a scientifically
derived conclusion, not a curatorial assignment.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825
for chondrule
formation, for example, (say gamma-ray bursts) that no one uses and thus
don't pollute the literature.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e
As Jeff Grossman uncovered, the smallest object named byu the NMomenclature
Committee is Y 8333 which weighs 12 mg. It corresponds to a particle about
2 mm in diameter.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
- Original Message -
From: Jim Wooddell
kind of a
meteorite it is before I see a thin section. Jason Utas, for example, is
much better at that than I am.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail
A few CK6s have impact-melt zones within them, but I haven't seen any such
zones in a CM.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
more
water and became more altered.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
achondrites are impact-melted chondrites and are thus not that different
than chondrite impact-melt breccias and chondrite impact-melt rocks. As I
said earlier, the origin of these meteorites is not important for their
proper classification, but it can lead to heated debates.
Alan
Alan Rubin
Institute
to distinguish essential from secondary properties. Similar
problems arose among classification schemes of living creatures and
especially fossils.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA
and
nucleation; the primary properties are the bulk chemical and isotopic
compositions of the irons.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru
that crystallized
from the matrix melt.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
(TiS) would
not likely occur on the Earth.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
to each other in the same way as the faces of a regular octahedron.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http
to nucleate at a higher temperature will have a longer
period within which kamacite can grow.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website
crystallized) and
send some of the pieces on their way to the inner solar system. Nonmagmatic
irons (such as IAB) are more controversial. Some think that they also
formed in cores; others that they formed as metal melt pools at the bottoms
of impact craters on chondritic asteroids.
Alan Rubin
and the asteroids would remain undifferentiated.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
405 Hilgard Avenue
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
- Original
Low-Ni or Ni-free iron doesn't occur just in some chondrules. It is also
found in impact-melt-rock clasts in ordinary chondrites and at the edges of
olivine grains in ureilites. These rocks have experienced localized in situ
reduction of FeO to metallic Fe as Jeff has pointed out. But let's
- Original Message -
From: cdtuc...@cox.net
To: Alan Rubin aeru...@ucla.edu; meteoritelist
meteorite-list@meteoritecentral.com
Sent: Friday, March 26, 2010 12:23 PM
Subject: Re: [meteorite-list] Nickel free metal in Meteorites
Alan,
Wow, I appreciate that your points are put
If we go back a bit (and as I pointed out in Disturbing the Solar System),
there is H. P. Lovecraft's 1927 horror story, The Colour out of Space,
wherein sinister space seeds within an iron meteorite poison the plants,
animals and people living on the farm where the meteorite fell.
I found that Dave McKay's recent quote that we do believe that we are very,
very close to proving there is or has been life (on Mars) is analogous to
that of Percival Lowell when he founded his observatory in Flagstaff,
Arizona in 1894. Lowell said that the purpose of the observatory was to
with the
video camera from Spike TV who had also come to the party.
Alan Rubin
- Original Message -
From: Ruben Garcia mrmeteor...@gmail.com
To: Meteorite List meteorite-list@meteoritecentral.com
Sent: Tuesday, December 08, 2009 7:37 PM
Subject: [meteorite-list] Meteorite hits and Kills Man
droplets in the nebula, then if the planetesimals into which they
subsequently accreted ever melted, then the chondrules would also melt and
the textural evidence for them would be forever erased.
Alan Rubin
- Original Message -
From: Greg Stanley stanleygr...@hotmail.com
To: epgrond
to look beyond these processes and infer what the
chondrules were like prior to accretion when they were isolated dustballs in
the nebula. This is a difficult task, but, as Jeff Grossman said, progress
is being made.
Alan Rubin
- Original Message -
From: Alexander Seidel g...@gmx.net
if they share
some of these characteristics with their colleagues.
Alan Rubin
- Original Message -
From: Meteorite-Recon.com i...@niger-meteorite-recon.de
To: Meteorite-list@meteoritecentral.com
Sent: Wednesday, September 09, 2009 6:21 AM
Subject: Re: [meteorite-list] Chondritic parent
the model.
As is clear, the situation is not yet resolved.
Alan Rubin
- Original Message -
From: Dave Gheesling d...@fallingrocks.com
To: 'Meteorite List' meteorite-list@meteoritecentral.com
Sent: Tuesday, September 08, 2009 8:40 PM
Subject: [meteorite-list] Chondritic parent bodies
All
Of course this abstract was superceded by the paper:
Dixon, Bogard, Garrison and Rubin (2004) 39Ar-40Ar evidence for early impact
events on the LL parent body. GCA 68, 3779-3790.
- Original Message -
From: bernd.pa...@paulinet.de
To: Meteorite-list@meteoritecentral.com
Sent:
John Wasson and I classified some meteorites as L/LL because we were
uncertain of their proper classification. Typical for these meteories, some
properties indicate L, some indicate LL, and some could be truly
intermediate between the established ranges. This may mean that they are
anomalous
it.
Alan
- Original Message -
From: Mr EMan mstrema...@yahoo.com
To: Carl 's carloselgua...@hotmail.com;
meteorite-list@meteoritecentral.com; Alan Rubin aeru...@ucla.edu
Sent: Friday, September 04, 2009 6:36 AM
Subject: Re: [meteorite-list] Let's talk about meteorites
--- On Thu, 9/3
mantle) to the basaltic surface of another
asteroid.
Alan Rubin
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Sorry,, but I guess I was not clear. The only group of silicate-bearing
irons widely agreed to have come from an asteroid core is the IVA group.
This group has little silicate, mainly small grains of silica, which some
think may have been vapor deposited in the core. There are no collisions
It is very unusual to have one ordinary chondrite group mixed with another.
Dimmitt (H regolith breccia) has an LL5 clast; St. Mesmin (LL regolith
breccia) has some H clasts. Let's get this thing named officially through
the Nomenclature Committee.
Alan Rubin
- Original Message
And, of course, if the name is mis-spelled originally, the mis-spelling
persists as the official name: Forrest 001, Dyarrl Island (which should be
Dyaul or Djaul), etc.
Alan Rubin
- Original Message -
From: Jeff Grossman [EMAIL PROTECTED]
To: meteorite-list@meteoritecentral.com
Sent
Ok, I have a few, too:
NO EAR MASK
AIR PUNCH
WORD FEATHER
A GRAIL MAN
RON HID CART
RICE TOYS
Alan Rubin
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found in meteorites after Hahn.
He called it Hahnia meteorica. He also believed the Widmanstatten
pattern in the Toluca iron was composed of fossilized plants.
Alan Rubin
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.
As far as nomenclature is concerned, most scientists refer to
lunar material blasted off the Moon and delivered to Earth as
lunar meteorites. Meteorites found on the moon don't seem to have
a special label and are simply referred to as meteorites from the
Moon.
Alan Rubin
About 10-15 yewars ago, Graham Ryder published an abstract about
this. He concluded that rocks from the Earth's early crust would
be mixed into the lunar regolith. These would be rocks no longer
extant on the Earth. These materials would be of great scientific
value, and for the record, should
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