[meteorite-list] More on Chiang Khan
From: mmorgan at mhmeteorites.com <mmorgan_at_meteoritecentral.com>
Date: Sat, 22 Mar 2008 14:07:55 +0000 Message-ID: <1586983126-1206195229-cardhu_decombobulator_blackberry.rim.net-655215319-_at_bxe032.bisx.prod.on.blackberry> I do have Bob's piece (main mass) in my collection, which also shows the brecciation. I can't recall the exact weight of the piece, but it can be seen on my collection page...www.mhmeteorites.com. It is a beautiful specimen shaped like a big jellybean. Matt Morgan ---------------------- Matt Morgan Mile High Meteorites http://www.mhmeteorites.com P.O. Box 151293 Lakewood, CO 80215 USA -----Original Message----- From: "Dave Gheesling" <dave at fallingrocks.com> Date: Sat, 22 Mar 2008 09:46:43 To:"'Martin Altmann'" <altmann at meteorite-martin.de>,<Meteorite-list at meteoritecentral.com> Subject: Re: [meteorite-list] More on Chiang Khan Martin & List, That is a terrific specimen, Martin, and thanks for sharing the image. My collection piece is small, but there is a cut face where some detail can be seen (scroll down, as it's the bottom image): http://www.fallingrocks.com/Collections/ChiangKhan.htm Sending this along as a follow-up to your mention of the interior below... Also, I believe the official TKW on this fall is 367 grams. But I seem to recall that Bob Haag had a single individual almost twice that size in one of his earlier catalogs. Does anyone have a sense for what the approximate total recovered weight might be? Best, Dave -----Original Message----- From: meteorite-list-bounces at meteoritecentral.com [mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Martin Altmann Sent: Saturday, March 22, 2008 9:28 AM To: Meteorite-list at meteoritecentral.com Subject: Re: [meteorite-list] More on Chiang Khan And a little addendum: If cut, several Chiang Khans show a brecciation like Juancheng. Here an oriented example in possession of Oliver Alge, who a while ago investigated the fall and recovered several stones more. http://www.meteorite-oliver.com/f23-1.jpg Unfortunately Chiang Khan became a victim of the recent hammer-hysterogeny and got very expensive nowadays. Happy Easter Martin -----Urspr?ngliche Nachricht----- Von: meteorite-list-bounces at meteoritecentral.com [mailto:meteorite-list-bounces at meteoritecentral.com] Im Auftrag von bernd.pauli at paulinet.de Gesendet: Samstag, 22. M?rz 2008 14:03 An: Meteorite-list at meteoritecentral.com Betreff: [meteorite-list] More on Chiang Khan Yagi K. et al. (1987) Petrology and Magnetic Properties Of Chiang Khan, Thailand, Meterorite (Meteoritics 22-4, 1987, pp. 536-537): Chiang Khan meteorite fell on Nov. 17, 1981 at Chiang Khan, Loei, Thailand. The meteorite consists of olivine, orthopyroxene, clinopyroxene, chromite, FeNi metal, plagioclase, glass, troilite, and phosphate in order of abundance. Olivine always forms barred or porphyritic chondrules. Its composition is very homogeneous with an average of Fo80, which is very close to the average com- position of olivine of equilibrated H chondrites (Van Schmus, 1969). Orthopyro- xene usually forms radiating chondrules as fibrous crystals, whereas clinopyroxene is much less, occurring as fibrous crystals in the devitrified glass or minute crystals in the rim of orthopyroxene. Both orthopyroxene and clinopyroxene have compositions similar to those of these pyroxenes of equilibrated H chondrites (Van Schmus, 1969). Ca-poor pyroxene is nearly always orthopyroxene and clinoenstatite is almost absent. Plagioclase is present as microcrystalline aggregates only in a groundmass of chondrules. Chondrules are present, showing their textures well, but their outlines are often not clear. Glass is more or less devitrified, resulting in aggregates of fibrous or microcrystals. The composition of these aggregates is similar to that of Ca-rich pyroxene + albitic plagioclase. When compositions of chromite are plotted in a diagram Mg/(Mg +Fe) vs. Al/ (Al + Cr), all of them fall in the field of H chondrites (Bunch et al., 1967). From these features the meteorite is classified as an equilibrated chondrite of H5 type (Van Schmus and Wood, 1967). Water content and magnetic properties were measured. Bunch T.E., Keil K., and Snetsinger K.G. (1967) GCA 31, 1569-1582. Van Schmus (1969) Earth Sci. Rev. 5, 145-184. Van Schmus WR. and Wood J.A. (1967) GCA 31, 747-765. ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list at meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list at meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list at meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Received on Sat 22 Mar 2008 10:07:55 AM PDT |
StumbleUpon del.icio.us Yahoo MyWeb |