Johnstown (Diogenite)

Country: USA
State/District: Colorado, Weld Co.
Date of fall/find: Fell 1924, July 06 1620
Total known weight: 40.3 kg (approx.)
Number of pieces: 27
Type: Achondrite, monomict diogenite, brecciated

Meteoritical Bulletin record: Click here

After four explosions, twenty-seven stones fell near Johnstown; the total weight recovered was about 40.25kg, and the largest stone weighed about 23.5kg, M.H.Hey, Cat. Met., 1966, p.223. Description, E.O.Hovey et al., Am. Mus. Novit., 1925, (203). Al-26 data, K.Fuse and E.Anders, GCA, 1969, 33, p.653. Minor and trace element composition of orthopyroxene, B.Mason and A.L.Graham, Smithson. Contrib. Earth Sci., 1970, (3). Bulk analysis, 12.9% total Fe, B.Mason and E.Jarosewich, Meteoritics, 1971, 6, p.241. Mössbauer study of pyroxene, T.V.Malysheva et al., Meteoritika, 1972, 31, p.101. Concentrations of heavy elements, H.Hintenberger et al., Meteoritics, 1973, 8, p.380 (abs.). U and Th abundances, J.W.Morgan and J.F.Lovering, GCA, 1973, 37, p.1697. Noble gas data, cosmic-ray exposure ages, G.F.Herzog and P.J.Cressy,Jr., GCA, 1977, 41, p.127. Mineral chemistry, a monomict, brecciated diogenite, R.J.Floran et al., Meteoritics, 1977, 12, p.226 (abs.). Exposure age based on spallogenic Mn-53 content, P.Englert and W.Herr, GCA, 1978, 42, p.1635. Infrared photometry, albedo, JHK colors, M.Leake et al., Meteoritics, 1978, 13, p.101. Thermal release profile of Zn, E.H.Cirlin and R.M.Housley, Meteoritics, 1978, 13, p.413 (abs.). Ti, Zr and Hf abundances, M.Shima, GCA, 1979, 43, p.353. Petrographic and chemical characterization of plagioclase clast, D.W.Mittlefehldt, GCA, 1979, 43, p.1917. UV reflectance spectra, J.K.Wagner et al., LPSC, 1980, 11, p.1193 (abs.). Calculation of atmospheric ablation based on cosmic ray tracks and Ne isotopes, N.Bhandari et al., Nucl. Tracks, 1980, 4, p.213. Mineralogy, petrology and trace element geochemistry, R.J.Floran et al., GCA, 1981, 45, p.2385. Thermal history, H.Mori and H.Takeda, Earth Planet. Sci. Lett., 1981, 53, p.266. Rb-Sr study, J.L.Birck and C.J.Allegre, Earth Planet. Sci. Lett., 1981, 55, p.116. Be-10 data, R.K.Moniot et al., GCA, 1983, 47, p.1887. Trace element data, R.Wolf et al., GCA, 1983, 47, p.2257. Oxygen fugacity data, R.H.Hewins and G.C.Ulmer, GCA, 1984, 48, p.1555. Halogene concentrations, G.Dreibus et al., International Workshop on Antarctic Meteorites, LPI Tech. Rept., 1986 (No. 86-01), p.35. Rb-Sr systematics, K.Takahashi et al., Papers 12th Symp. Ant. Met., NIPR Tokyo, 1987, p.96 (abs.); see also, K.Takahashi, Papers 14th Symp. Ant. Met., NIPR Tokyo, 1989, p.89 (abs.). Calculation of cooling rate based on Fe-Mg ordering in orthopyroxenes, J.Ganguly et al., LPSC, 1989, 20, p.331 (abs.). TL data, D.W.G.Sears et al., GCA, 1991, 55, p.3167, J.D.Batchelor and D.W.G.Sears, GCA, 1991, 55, p.3831. Study of Fe-Mg ordering in orthopyroxenes, G.M.Molin et al., Earth Planet. Sci. Lett., 1991, 105, p.260. Magnetic properties, D.W.Collinson and S.J.Morden, Earth Planet. Sci. Lett., 1994, 126, p.421. Major and trace element composition of bulk and mineral separates, D.W.Mittlefehldt, GCA, 1994, 58, p.1537. Analysis of major and minor elements in orthopyroxene, G.W.Fowler et al., GCA, 1994, 58, p.3921. Ti and trace element contents of orthopyroxene, G.W.Fowler et al., GCA, 1995, 59, p.3071. Analysis of modal abundances, L.E.Bowman et al., LPSC, 1996, 27, p.147 (abs.); see also, MAPS, 1997, 32, p.869. Mn-Cr isotope systematics, G.W.Lugmair and A.Shukolyukov, LPSC, 1997, 28, p.851 (abs.). Cooling rate calculation; X-ray diffraction study of Fe-Mg ordering in orthopyroxene crystals and chemical analysis, M.Zema et al., MAPS, 1997, 32, p.855. Carbon abundance and isotopic composition, M.M.Grady et al., MAPS, 1997, 32, p.863. Cosmogenic radionuclides, noble gas isotopes, and cosmic-ray exposure ages, K.C.Welten et al., MAPS, 1997, 32, p.891. Mn-Cr isotope systematics, G.W.Lugmair and A.Shukolyukov, GCA, 1998, 62, p.2863. VIS reflectance spectra, T.Hiroi and C.M.Pieters, Antarct. Meteorite Res., 1998, (11), p.163. EPMA analysis of fusion crust, M.J.Genge and M.M.Grady, MAPS, 1999, 34, p.341. Chemical study of glass inclusions, K.Kitazato and M.Kurosawa, Evolution of Solar System Materials: A New Perspective from Antarctic Meteorites, NIPR Tokyo, 2003, p.54 (abs.). Calculation of parental melt composition, J.-A.Barrat, MAPS, 2004, 39, p.1767.

ID#: 4923
Description: Cut fragment
Size: 1.5 x 1.5 x 0.8 cm
Weight: 1.934 gr

US$ 295.00


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