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Friday, 23 July 2004

Yanshan meteorite crater

Yanshan meteorite crater

Paul H bristolia at yahoo.com
Fri Jul 23 09:26:34 EDT 2004

I couldn't find any information about a "Yanshan
meteorite crater". Apparently, it is the "Yanshan
meteorite" as possibly discussed by Alexander Seidel
at:

http://six.pairlist.net/pipermail/meteorite-list/2004-July/142637.html


What I found on the web was:

1. Xifengite at:
http://webmineral.com/data/Xifengite.shtml
http://www.mindat.org/locentry-5890.html

"Innermost in spheres, surrounded by nickel-iron
minerals and their oxidation products, apparently
of extraterrestrial origin, found in placers."

and 2. Gupeiite at:
http://webmineral.com/data/Gupeiite.shtml
http://www.mindat.org/locentry-5890.html

"Innermost in spheres, surrounded by nickel-iron
minerals and their oxidation products, apparently
of extraterrestrial origin, found in placers."

Some references for both minerals that I found are:

Dunn, P. J., Chao, G. Y., Fitzpatrick, J. J.,
Langley, R. H., Fleischer, M., and Zilczer,
J. A., 1986, New mineral names. American
Mineralogist. vol. 71, no. 1-2, pp. 227-232.
(February 1986)

Generalov, Mikhail and Naumov, Vladimir, 1996,
Iron-chromium carbides and iron silicides from
gold-platinum-bearing placer of the Urals (Russia).
Congres Geologique International, Resumes
(30th) [International Geological Congress,
Abstracts] vol. 30, no.2, pp. 447

Zuxian, Y., 1984, Two new minerals gupeiite and
xifengite in cosmic dusts from Yanshan. Yen
Kuang Tse Shih. [Acta Petrologica Mineralogica
et Analytica] vol. 3, no. 3, pp. 231-238
(September 1984)

Zuxian, Y., 1986, Some new minerals from platinum-
bearing rocks in Yanshan and Tibet regions, China.
Dizhi Yanjiuso Sokan [Bulletin of the Institute
of Geology, Chinese Academy of Geological Sciences]
vol. 2, no. 15, pp. 49-57.

It appears that these minerals were first found in
"cosmic dust" (Dunn et al. 1986 and Zuxian 1984) and
later found in platinum-bearing rocks and placers
(Zuxian 1986 and Generalov and Vladimir 1996).

Yours,

Paul
Baton Rouge, LA

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