[meteorite-list] Re: [meteorite-list]Again on Galim (a) and Galim(b) question??????

From: Michael L Blood <*mlblood_at_meteoritecentral.com*> Date: Thu Apr 22 10:10:02 2004 Message-ID: <BAB1C485.50C1%mlblood_at_cox.net> · mlblood_at_meteoritecentral.com

--
NOT AT ALL!
        I was referring to my earlier post that it WAS an earlier fall,
which the later report clarified was entirely wrong on my part.
        You would have to have a history of watching Saturday Night
Live on US TV to "get it." Sorry.
        Best wishes, Michael
--
    Apologies to all non-us readers. My comment was entirely dependant
on one having a history based in the US. Then, by meaning is perfectly
clear (unless it was a US reader that didn't watch Saturday Night Live
a couple of decades ago).
        Best wishes, Michael
on 4/3/03 10:14 AM, Michael L Blood at mlblood_at_cox.net wrote:
> In the words of Rosanna Rosannadanna, "Oh. Never mind."  Michael
> 
> on 4/3/03 6:42 AM, rochette at rochette_at_cerege.fr wrote:
> 
>> Dear dave
>> here is the answer:
>> Title:
>> The Galim LL/EH polymict breccia: Evidence for impact-induced exchange
>> between reduced and oxidized meteoritic material
>> Authors:
>> Rubin, Alan E.
>> Journal:
>> Meteoritics, vol. 32, pages 489-492
>> Publication Date:
>> 07/1997
>> Origin:
>> METIC
>> Bibliographic Code:
>> 1997M&PS...32..489R
>> Abstract
>> Galim is a polymict breccia consisting of a heavily shocked (shock stage
>> S6) LL6 chondrite [Galim (a)] and an impact-melted EH chondrite [Galim
>> (b)]. Relict chondrules in Galim (b) served as nucleation sites for
>> euhedral enstatite grains crystallizing from the impact melt. Many of the
>> reduced phases typical of EH chondrites (e.g., Si-bearing metallic Fe-Ni;
>> Ti-bearing troilite) are absent. Galim (b) was probably shock-melted while
>> in contact with a more oxidized source, i.e., Galim (a); during this event
>> Si was oxidized from the metal and Ti was oxidized from troilite. Galim (a)
>> contains shock veins and recrystallized, unzoned olivine. The absence of
>> evidence for reduction in Galim (a) may indicate that the amount of LL
>> material greatly exceeded that of EH material; shock metamorphism may have
>> taken place on the LL parent body. Shock-induced redox reactions such as
>> those inferred for the Galim breccia appear to be restricted mainly to
>> asteroids because the low-end tail of their relative-velocity distribution
>> permits mixing of intact disparate materials (including accretion of
>> projectiles of different oxidation states) whereas the peak of the
>> distribution leads to high equilibration shock pressures (allowing
>> impact-induced exchange between previously accreted, disequilibrated
>> materials). Galim probably formed by a two-stage process: (1) accretion to
>> the LL parent body of an intact EH projectile at low relative velocities,
>> and (2) shock metamorphism of the assemblage by the subsequent impact of
>> another projectile at significantly higher relative velocities.
>> 
>> conclusion: a single fall can be made of different classes. The fall place
>> is heavily vegetated so there is no chance that accidentally an older fall
>> (b) was found in the strewnfielf of a)...
>> 
>> 
>> Pierre
>> 
>> 
>> 
>> ______________________________________________
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> 
> The whole problem with the world is that fools and fanatics are always so
> certain of themselves, but wiser people so full of doubts.
> Bertrand Russell
> --
> Worth Seeing:
> -  Earth at night from satelite:
> http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg
> - Interactive Lady Liberty:
> http://doody36.home.attbi.com/liberty.htm
> - Earth - variety of choices:
> http://www.fourmilab.ch/earthview/vplanet.html
> --
> Panoramic view of Meteor Crater:
> http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met
> eorCraterRimL.html
> --
> Cool Calendar & Clock:
> http://www.yugop.com/ver3/stuff/03/fla.html
> --
> Michael Blood Meteorites & Didgeridoos for sale at:
> http://www.michaelbloodmeteorites.com/
> 
> 
> 
> 
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The whole problem with the world is that fools and fanatics are always so
certain of themselves, but wiser people so full of doubts.
    Bertrand Russell
--
Worth Seeing:
-  Earth at night from satelite:
http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg
- Interactive Lady Liberty:
http://doody36.home.attbi.com/liberty.htm
- Earth - variety of choices:
http://www.fourmilab.ch/earthview/vplanet.html
--
Panoramic view of Meteor Crater:
http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met
eorCraterRimL.html
--
Cool Calendar & Clock:
  http://www.yugop.com/ver3/stuff/03/fla.html
--
Michael Blood Meteorites & Didgeridoos for sale at:
http://www.michaelbloodmeteorites.com/