[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-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] Im Auftrag von
bernd.pauli at paulinet.de
Gesendet: Freitag, 26. Juni 2009 18:26
An: Meteorite-list at 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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