[meteorite-list] Quartz in meteorites

[bernd.pauli at paulinet.de]

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