Re: [meteorite-list] RES: Quartz on meteorites

2017-09-25 Thread Carl Agee via Meteorite-list 
Abdelfattah:
The quartz grains stuck in the sample I assume are terrestrial, of
course the H6 is meteorite!
Best regards,
Carl
*
Carl B. Agee
President, Consortium for Materials Properties Research in Earth
Sciences (COMPRES)
Director, Institute of Meteoritics
Professor, Earth and Planetary Sciences
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126

Tel: (505) 750-7172
Fax: (505) 277-3577
Email: a...@unm.edu
http://meteorite.unm.edu/people/carl_agee/
http://compres.us/about-us/compres-president



On Mon, Sep 25, 2017 at 5:43 PM, Abdelfattah Gharrad via
Meteorite-list <meteorite-list@meteoritecentral.com> wrote:
> Hello all and thanks for answers and it's nice to have more idea and learning 
> from all.
>
>
> if we see grains of quartz stuck on a stone so this stone is not meteorite?
>
> a stone that I had the opportunity to see mottled with quartz grains (SiO2) 
> and it is a meteorite analyzed as H6 chondrite by Prof. Carl Agee
>
> Physical characteristics: TKW: 571 g. Dark brown exterior, saw cut reveals 
> fine grained oxidized brown interior with fine weathering veins.
>
> Petrography: (C. Agee, UNM) SEM, EDS, EMPA. Microprobe examination of a 
> polished mount shows olivine, low-Ca pyroxene, plagioclase, few small, <500 
> micron, extensively equilibrated chondrules, ubiquitous troilite, oxidized 
> kamacite, and weathering veins .
>
> Mineral compositions and Geochemistry: (C. Agee and N. Wilson, UNM) EMPA. 
> Olivine Fa19 Fe/Mn=42, low-Ca pyroxene Fs17 Wo1.4 Fe/Mn=24, plagioclase Ab81.
>
> Classification: Ordinary chondrite (H6), moderately weathered.
>
> Specimens: Oakes holds the main mass, 22.9 g including a probe mount on 
> deposit at UNM.
>
> Best regards,
> Abdelfattah.
>
>
>
> 
> En date de : Lun 25.9.17, André Moutinho via Meteorite-list 
> <meteorite-list@meteoritecentral.com> a écrit :
>
>  Objet: [meteorite-list] RES:  Quartz on meteorites
>  À: "ALAN RUBIN" <aeru...@ucla.edu>, "Abdelfattah Gharrad" 
> <agharra...@yahoo.com>, "meteorite list" <meteorite-list@meteoritecentral.com>
>  Date: Lundi 25 septembre 2017, 17h48
>
>  Hello all,
>
>  Morro do Rocio is a Brazilian meteorite
>  that sílica was found:
>  http://adsabs.harvard.edu/full/1985Metic..20..467F
>
>  Best
>
>  Andre
>
>
>
>  De: Meteorite-list
>  [mailto:meteorite-list-boun...@meteoritecentral.com]
>  Em nome de ALAN
>  RUBIN via Meteorite-list
>  Enviada em: sábado, 23 de setembro de
>  2017 21:28
>  Para: Abdelfattah Gharrad <agharra...@yahoo.com>
>  Cc: Meteoritecentral List <meteorite-list@meteoritecentral.com>
>  Assunto: Re: [meteorite-list] Quartz on
>  meteorites
>
>
>
>  A few meteorites do contain rare grains
>  of SiO2 including tridymite,
>  quartz and cristobalite, but generally
>  these grains are quite small
>  and intergrown with other silicate
>  phases. Some IVA irons contain a
>  few blades of trydimite, but if you see
>  a rock with several percent or
>  more of quartz grains that are
>  millimeter size or larger, it will not
>  be a meteorite.
>
>
>
>  On Sat, Sep 23, 2017 at 4:46 PM,
>  Abdelfattah Gharrad via
>  Meteorite-list <meteorite-list@meteoritecentral.com>
>  wrote:
>
>  Hello members,
>
>  I really want to post my question about
>  quartz longtimes ago,   what I
>  learned that if one sees quartz on a
>  stone then the stone is not
>  meteorite.
>  in my knowledge there are different
>  types of quartz and whose chemical
>  formula is SiO2.
>
>  habitually no quartz in the meteorites
>  but if there is in a meteorite
>  then it is a rare stone and whose
>  classification differs from other
>  meteorites and testimony of another
>  planet it's just opinion.
>
>  I think that the meteorites have
>  chemical compositions like the
>  terrestrial stones (magmatic, volcanic
>  ...). the probability that a
>  meteorite contains SiO2 is not zero.
>
>  if there is a clarification please.
>
>  Thanks,
>  Abdelfattah.
>  __
>
>  Visit our Facebook page https://www.facebook.com/meteoritecentral
>  and
>  the Archives at http://www.meteorite-list-archives.com
>  Meteorite-list mailing list
>  Meteorite-list@meteoritecentral.com
>  https://pairlist3.pair.net/mailman/listinfo/meteorite-list
>
>
>
>
>
>  --
>
>  Alan Rubin
>
>  Institute of Geophysics and Planetary
>  Physics
>
>  Department of Earth, Planetary, and
>  Space Sciences
>
>  University of California
>
>  3845 Slichter Hall
&

Re: [meteorite-list] RES: Quartz on meteorites

2017-09-25 Thread Abdelfattah Gharrad via Meteorite-list 
Hello all and thanks for answers and it's nice to have more idea and learning 
from all.


if we see grains of quartz stuck on a stone so this stone is not meteorite?

a stone that I had the opportunity to see mottled with quartz grains (SiO2) and 
it is a meteorite analyzed as H6 chondrite by Prof. Carl Agee

Physical characteristics: TKW: 571 g. Dark brown exterior, saw cut reveals fine 
grained oxidized brown interior with fine weathering veins.

Petrography: (C. Agee, UNM) SEM, EDS, EMPA. Microprobe examination of a 
polished mount shows olivine, low-Ca pyroxene, plagioclase, few small, <500 
micron, extensively equilibrated chondrules, ubiquitous troilite, oxidized 
kamacite, and weathering veins .

Mineral compositions and Geochemistry: (C. Agee and N. Wilson, UNM) EMPA. 
Olivine Fa19 Fe/Mn=42, low-Ca pyroxene Fs17 Wo1.4 Fe/Mn=24, plagioclase Ab81.

Classification: Ordinary chondrite (H6), moderately weathered.

Specimens: Oakes holds the main mass, 22.9 g including a probe mount on deposit 
at UNM.

Best regards,
Abdelfattah.


 

En date de : Lun 25.9.17, André Moutinho via Meteorite-list 
<meteorite-list@meteoritecentral.com> a écrit :

 Objet: [meteorite-list] RES:  Quartz on meteorites
 À: "ALAN RUBIN" <aeru...@ucla.edu>, "Abdelfattah Gharrad" 
<agharra...@yahoo.com>, "meteorite list" <meteorite-list@meteoritecentral.com>
 Date: Lundi 25 septembre 2017, 17h48
 
 Hello all,
 
 Morro do Rocio is a Brazilian meteorite
 that sílica was found:
 http://adsabs.harvard.edu/full/1985Metic..20..467F
 
 Best
 
 Andre
 
 
 
 De: Meteorite-list
 [mailto:meteorite-list-boun...@meteoritecentral.com]
 Em nome de ALAN
 RUBIN via Meteorite-list
 Enviada em: sábado, 23 de setembro de
 2017 21:28
 Para: Abdelfattah Gharrad <agharra...@yahoo.com>
 Cc: Meteoritecentral List <meteorite-list@meteoritecentral.com>
 Assunto: Re: [meteorite-list] Quartz on
 meteorites
 
 
 
 A few meteorites do contain rare grains
 of SiO2 including tridymite,
 quartz and cristobalite, but generally
 these grains are quite small
 and intergrown with other silicate
 phases. Some IVA irons contain a
 few blades of trydimite, but if you see
 a rock with several percent or
 more of quartz grains that are
 millimeter size or larger, it will not
 be a meteorite.
 
 
 
 On Sat, Sep 23, 2017 at 4:46 PM,
 Abdelfattah Gharrad via
 Meteorite-list <meteorite-list@meteoritecentral.com>
 wrote:
 
 Hello members,
 
 I really want to post my question about
 quartz longtimes ago,   what I
 learned that if one sees quartz on a
 stone then the stone is not
 meteorite.
 in my knowledge there are different
 types of quartz and whose chemical
 formula is SiO2.
 
 habitually no quartz in the meteorites
 but if there is in a meteorite
 then it is a rare stone and whose
 classification differs from other
 meteorites and testimony of another
 planet it's just opinion.
 
 I think that the meteorites have
 chemical compositions like the
 terrestrial stones (magmatic, volcanic
 ...). the probability that a
 meteorite contains SiO2 is not zero.
 
 if there is a clarification please.
 
 Thanks,
 Abdelfattah.
 __
 
 Visit our Facebook page https://www.facebook.com/meteoritecentral
 and
 the Archives at http://www.meteorite-list-archives.com
 Meteorite-list mailing list
 Meteorite-list@meteoritecentral.com
 https://pairlist3.pair.net/mailman/listinfo/meteorite-list
 
 
 
 
 
 -- 
 
 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: 310-825-3202
 
 fax: 310-206-3051
 
 e-mail: aeru...@ucla.edu
 
 website: http://cosmochemists.igpp.ucla.edu/Rubin.html
 __
 
 Visit our Facebook page https://www.facebook.com/meteoritecentral
 and the Archives at http://www.meteorite-list-archives.com
 Meteorite-list mailing list
 Meteorite-list@meteoritecentral.com
 https://pairlist3.pair.net/mailman/listinfo/meteorite-list
 
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[meteorite-list] RES: Quartz on meteorites

2017-09-25 Thread André Moutinho via Meteorite-list 
Hello all,

Morro do Rocio is a Brazilian meteorite that sílica was found:
http://adsabs.harvard.edu/full/1985Metic..20..467F

Best

Andre



De: Meteorite-list
[mailto:meteorite-list-boun...@meteoritecentral.com] Em nome de ALAN
RUBIN via Meteorite-list
Enviada em: sábado, 23 de setembro de 2017 21:28
Para: Abdelfattah Gharrad 
Cc: Meteoritecentral List 
Assunto: Re: [meteorite-list] Quartz on meteorites



A few meteorites do contain rare grains of SiO2 including tridymite,
quartz and cristobalite, but generally these grains are quite small
and intergrown with other silicate phases. Some IVA irons contain a
few blades of trydimite, but if you see a rock with several percent or
more of quartz grains that are millimeter size or larger, it will not
be a meteorite.



On Sat, Sep 23, 2017 at 4:46 PM, Abdelfattah Gharrad via
Meteorite-list  wrote:

Hello members,

I really want to post my question about quartz longtimes ago,   what I
learned that if one sees quartz on a stone then the stone is not
meteorite.
in my knowledge there are different types of quartz and whose chemical
formula is SiO2.

habitually no quartz in the meteorites but if there is in a meteorite
then it is a rare stone and whose classification differs from other
meteorites and testimony of another planet it's just opinion.

I think that the meteorites have chemical compositions like the
terrestrial stones (magmatic, volcanic ...). the probability that a
meteorite contains SiO2 is not zero.

if there is a clarification please.

Thanks,
Abdelfattah.
__

Visit our Facebook page https://www.facebook.com/meteoritecentral and
the Archives at http://www.meteorite-list-archives.com
Meteorite-list mailing list
Meteorite-list@meteoritecentral.com
https://pairlist3.pair.net/mailman/listinfo/meteorite-list





-- 

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: 310-825-3202

fax: 310-206-3051

e-mail: aeru...@ucla.edu

website: http://cosmochemists.igpp.ucla.edu/Rubin.html
__

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Archives at http://www.meteorite-list-archives.com
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