Re: [meteorite-list] Quartz on meteorites

[ALAN RUBIN via Meteorite-list]

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 <mouti...@gmail.com> wrote:

> 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
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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: 310-825-3202
>
> fax: 310-206-3051
>
> e-mail: aeru...@ucla.edu
>
> website: http://cosmochemists.igpp.ucla.edu/Rubin.html
>



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

[Carl Esparza via Meteorite-list]

Hello, I think the question came up because of a facebook post in Meteorites by 
Stefan Ralew that says; "Probably the oldest quartz crystals of the solar 
system (quartz or tridimite). Found in a ungrouped achondrite meteorite from 
the Sahara. More information will follow...". Along with a really nice close-up 
picture of the crystal itself. 

https://www.facebook.com/photo.php?fbid=880902565402927=gm.1827294997297820=3=1

Carl
--
Love & Life

 ALAN RUBIN via Meteorite-list  wrote: 
> 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

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Re: [meteorite-list] Quartz on meteorites

[Carl Agee via Meteorite-list]

Hi Alan,

Perhaps you missed our talks at MetSoc:

https://www.hou.usra.edu/meetings/metsoc2017/pdf/6129.pdf
https://www.hou.usra.edu/meetings/metsoc2017/pdf/6268.pdf

NWA 9 has more than 20% silica polymorphs (mix of tridymite and
cristobalite).

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 Sat, Sep 23, 2017 at 6:28 PM, ALAN RUBIN via Meteorite-list
 wrote:
> 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
>
>
> __
>
> Visit our Facebook page https://www.facebook.com/meteoritecentral and the
> Archives at http://www.meteorite-list-archives.com
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>
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Re: [meteorite-list] Quartz on meteorites

[ALAN RUBIN via Meteorite-list]

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
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[meteorite-list] Quartz on meteorites

[Abdelfattah Gharrad via Meteorite-list]

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.
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[meteorite-list] Quartz in meteorites

[bernd . pauli]

Hello Folks,

01) MONTEIRO J.F. (1989) Preliminary study of the Chaves
howardite (Meteoritics 24-4, 1989, pp. A305-A306):

Quartz and tridymite were observed in thin section...

02) RUBIN A.E. (1997) Mineralogy of meteorite groups
(Meteoritics 32-2, 1997, 231-247, p. 241, excerpts):

The basaltic shergottites are fine-grained rocks consisting of major pigeonite,
augite and maskelynite, minor titanian magnetite, ilmenite, pyrrhotite and
whitlockite, and accessory fayalite, q u a r t z , baddeleyite and chlorapatite
within the mesostasis (McSween, 1994).

03) AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011:
Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019):

Northwest Africa 011 is an unbrecciated achondrite unlike ... Accessories
are metal, troilite, spinel, ilmenite, and  q u a r t z.

04) SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4
chondrite from Ukraine (MAPS 33, 1998, A193-A196):

The meteorite contains olivine, low-Ca pyroxene, Ni-Fe, troilite, and minor 
amounts
of high-Ca pyroxene, chromite, feldspathic plagioclase, phosphates, metallic Cu 
and
rare grains of spinel and  q u a r t z .

05) ZHANG Y. et al. (1996) Pyroxene structures, cathodoluminescence and
the thermal history of the enstatite chondrites (Meteoritics 31-1, 1996, 87-96):

Mason (1968) suggested a maximum equilibration temperature of 870°C based
on the presence of  q u a r t z .

Best wishes,

Bernd

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Re: [meteorite-list] Quartz in meteorites

[cdtucson]

Bernd, List,
 I have a follow-up question;
I realize the amount of quartz found in all of these different types of 
meteorites is small but, why does that mean it cannot be found in larger 
amounts? With all due respect, Who came up with this rule? As one example in a 
million, even nickel in Iron meteorites varies from a few percent to as high as 
sixty percent and all Earth rocks with quartz have a varying degree as well 
from a ppm to pure; 100%. 
Thanks.
Carl Esparza
IMCA 5829

 bernd.pa...@paulinet.de wrote: 
 Hello Folks,
 
 01) MONTEIRO J.F. (1989) Preliminary study of the Chaves
 howardite (Meteoritics 24-4, 1989, pp. A305-A306):
 
 Quartz and tridymite were observed in thin section...
 
 02) RUBIN A.E. (1997) Mineralogy of meteorite groups
 (Meteoritics 32-2, 1997, 231-247, p. 241, excerpts):
 
 The basaltic shergottites are fine-grained rocks consisting of major 
 pigeonite,
 augite and maskelynite, minor titanian magnetite, ilmenite, pyrrhotite and
 whitlockite, and accessory fayalite, q u a r t z , baddeleyite and 
 chlorapatite
 within the mesostasis (McSween, 1994).
 
 03) AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011:
 Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019):
 
 Northwest Africa 011 is an unbrecciated achondrite unlike ... Accessories
 are metal, troilite, spinel, ilmenite, and  q u a r t z.
 
 04) SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4
 chondrite from Ukraine (MAPS 33, 1998, A193-A196):
 
 The meteorite contains olivine, low-Ca pyroxene, Ni-Fe, troilite, and minor 
 amounts
 of high-Ca pyroxene, chromite, feldspathic plagioclase, phosphates, metallic 
 Cu and
 rare grains of spinel and  q u a r t z .
 
 05) ZHANG Y. et al. (1996) Pyroxene structures, cathodoluminescence and
 the thermal history of the enstatite chondrites (Meteoritics 31-1, 1996, 
 87-96):
 
 Mason (1968) suggested a maximum equilibration temperature of 870°C based
 on the presence of  q u a r t z .
 
 Best wishes,
 
 Bernd
 
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Re: [meteorite-list] Quartz in meteorites

[cdtucson]

Bernd, List,
 I have a follow-up question;
I realize the amount of quartz found in all of these different types of 
meteorites is small but, why does that mean it cannot be found in larger 
amounts? With all due respect, Who came up with this rule? As one example in a 
million, even nickel in Iron meteorites varies from a few percent to as high as 
sixty percent and all Earth rocks with quartz have a varying degree as well 
from a ppm to pure; 100%. 
Thanks.
Carl Esparza
IMCA 5829

 bernd.pa...@paulinet.de wrote: 
 Hello Folks,
 
 01) MONTEIRO J.F. (1989) Preliminary study of the Chaves
 howardite (Meteoritics 24-4, 1989, pp. A305-A306):
 
 Quartz and tridymite were observed in thin section...
 
 02) RUBIN A.E. (1997) Mineralogy of meteorite groups
 (Meteoritics 32-2, 1997, 231-247, p. 241, excerpts):
 
 The basaltic shergottites are fine-grained rocks consisting of major 
 pigeonite,
 augite and maskelynite, minor titanian magnetite, ilmenite, pyrrhotite and
 whitlockite, and accessory fayalite, q u a r t z , baddeleyite and 
 chlorapatite
 within the mesostasis (McSween, 1994).
 
 03) AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011:
 Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019):
 
 Northwest Africa 011 is an unbrecciated achondrite unlike ... Accessories
 are metal, troilite, spinel, ilmenite, and  q u a r t z.
 
 04) SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4
 chondrite from Ukraine (MAPS 33, 1998, A193-A196):
 
 The meteorite contains olivine, low-Ca pyroxene, Ni-Fe, troilite, and minor 
 amounts
 of high-Ca pyroxene, chromite, feldspathic plagioclase, phosphates, metallic 
 Cu and
 rare grains of spinel and  q u a r t z .
 
 05) ZHANG Y. et al. (1996) Pyroxene structures, cathodoluminescence and
 the thermal history of the enstatite chondrites (Meteoritics 31-1, 1996, 
 87-96):
 
 Mason (1968) suggested a maximum equilibration temperature of 870°C based
 on the presence of  q u a r t z .
 
 Best wishes,
 
 Bernd
 
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Re: [meteorite-list] Quartz in meteorites

[Martin Altmann]

Hello Bernd,

and do you remember the NWA 4905 in your collection, which in that context
could point in that direction?
Although we haven't new results yet.

Wait, Tom Phillips made also some of his fantastic takes with NWA 4905..

Here:  http://www.meteorite-times.com/Back_Links/2009/april/index.htm
 
Click in the side menu on Micro Visions.

Funny enough Tom writes there about his macroscopic impressions:
I think I would dismiss it as Granite.

Best!
Martin


(Ouch, the impertinent seller in me tips my shoulder and murmurs: 
Somewhere in their vast stock, Chladni's Heirs should have a slice of that
fabulous stuff left!)



-Ursprüngliche Nachricht-
Von: meteorite-list-boun...@meteoritecentral.com
[mailto:meteorite-list-boun...@meteoritecentral.com] Im Auftrag von
bernd.pa...@paulinet.de
Gesendet: Freitag, 26. Juni 2009 18:26
An: Meteorite-list@meteoritecentral.com
Betreff: [meteorite-list] Quartz in meteorites

Hello Folks,

01) MONTEIRO J.F. (1989) Preliminary study of the Chaves
howardite (Meteoritics 24-4, 1989, pp. A305-A306):

Quartz and tridymite were observed in thin section...

02) RUBIN A.E. (1997) Mineralogy of meteorite groups
(Meteoritics 32-2, 1997, 231-247, p. 241, excerpts):

The basaltic shergottites are fine-grained rocks consisting of major
pigeonite,
augite and maskelynite, minor titanian magnetite, ilmenite, pyrrhotite and
whitlockite, and accessory fayalite, q u a r t z , baddeleyite and
chlorapatite
within the mesostasis (McSween, 1994).

03) AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011:
Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019):

Northwest Africa 011 is an unbrecciated achondrite unlike ... Accessories
are metal, troilite, spinel, ilmenite, and  q u a r t z.

04) SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4
chondrite from Ukraine (MAPS 33, 1998, A193-A196):

The meteorite contains olivine, low-Ca pyroxene, Ni-Fe, troilite, and minor
amounts
of high-Ca pyroxene, chromite, feldspathic plagioclase, phosphates, metallic
Cu and
rare grains of spinel and  q u a r t z .

05) ZHANG Y. et al. (1996) Pyroxene structures, cathodoluminescence and
the thermal history of the enstatite chondrites (Meteoritics 31-1, 1996,
87-96):

Mason (1968) suggested a maximum equilibration temperature of 870°C based
on the presence of  q u a r t z .

Best wishes,

Bernd

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[meteorite-list] Quartz in meteorites

[bernd . pauli]

But in a very few quartz is found

Here are a few examples:


MONTEIRO J.F. (1989) Preliminary study of the Chaves
howardite (Meteoritics 24-4, 1989, pp. A305-A306):

Quartz and tridymite were observed in thin section and, during electron 
microprobe
work, many small complex intergrowths between plagioclase and pyroxene crystals
were found to contain very high silica.

RUBIN A.E. (1997) Mineralogy of meteorite groups
(Meteoritics 32-2, 1997, 231-247, p. 241, excerpts):

The basaltic shergottites are fine-grained rocks consisting of ...and accessory 
fayalite,
quartz, baddeleyite and chlorapatite within the mesostasis (McSween, 1994).

AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011:
Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019):

Northwest Africa 011 is an unbrecciated achondrite unlike Dhofar 007, with a 
metagabbroitic
structure consisting of subhedral grains of pigeonite (0.5-0.6 mm) and 
plagioclase (0.05-0.1 mm).
Accessories are metal, troilite, spinel, ilmenite, and quartz. 

(Lunar and Planetary Science XXXIII (2002) 1434.pdf):

A New Shergottite From Oman, Dhofar 378

The oxygen fugacity is consistent with the assemblage of fayalite, quartz, and 
magnetite.

SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4
chondrite from Ukraine (MAPS 33, 1998, A193-A196):

The meteorite contains ...metallic Cu and rare grains of spinel and quartz. 


To: [EMAIL PROTECTED]
meteorite-list@meteoritecentral.com

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Re: [meteorite-list] Quartz in meteorites

[Gary K. Foote]

Here is a pic of NWA 4716 with what looks to be a round quartz inclusion in its 
upper right 
corner.  I haven't had any opinions on whether or not it is really quartz - may 
be feldspar.  
Looks like it may be...

http://www.webbers.com/meteorites/images/bb11a.jpg

Gary

 But in a very few quartz is found
 
 Here are a few examples:
 
 
 MONTEIRO J.F. (1989) Preliminary study of the Chaves
 howardite (Meteoritics 24-4, 1989, pp. A305-A306):
 
 Quartz and tridymite were observed in thin section and, during
 electron microprobe
 work, many small complex intergrowths between plagioclase and
 pyroxene crystals
 were found to contain very high silica.
 
 RUBIN A.E. (1997) Mineralogy of meteorite groups
 (Meteoritics 32-2, 1997, 231-247, p. 241, excerpts):
 
 The basaltic shergottites are fine-grained rocks consisting of
 ...and accessory fayalite,
 quartz, baddeleyite and chlorapatite within the mesostasis (McSween,
 1994).
 
 AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011:
 Two new eucrites of different types (MAPS 35-5, 2000, Suppl.,
 A019):
 
 Northwest Africa 011 is an unbrecciated achondrite unlike Dhofar
 007, with a metagabbroitic
 structure consisting of subhedral grains of pigeonite (0.5-0.6 mm)
 and plagioclase (0.05-0.1 mm).
 Accessories are metal, troilite, spinel, ilmenite, and quartz. 
 
 (Lunar and Planetary Science XXXIII (2002) 1434.pdf):
 
 A New Shergottite From Oman, Dhofar 378
 
 The oxygen fugacity is consistent with the assemblage of fayalite,
 quartz, and magnetite.
 
 SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4
 chondrite from Ukraine (MAPS 33, 1998, A193-A196):
 
 The meteorite contains ...metallic Cu and rare grains of spinel and
 quartz. 
 
 
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