Morasko Meteorite

A mass of 77.5kg was dug up in 1914, F.Slavik and L.J.Spencer, Min. Mag., 1928, 21, p.478, A.Laszkiewicz, Mineralogia, Warszawa, 1936, p.195 (M.A.6-385). At least 15 more masses, totalling about 211kg have since been found, analysis, 6.65% Ni, J.Pokrzywnicki, Urania, 1955, 26, p.165, J. Pokrzywnicki, Urania, 1957, 28, p.232, J.Pokrzywnicki, Acta Geol. Polon., 1955, 3, p.427, J.Pokrzywnicki, Acta Geophys. Polon., 1956, 4, p.21, J. Pokrzywnicki, Meteoritika, 1958, 16, p.123 (M.A.13-79; 14-126). Eight small craters are associated with the find-sites of several large irons, J.Pokrzywnicki, Studia Geol. Polon., 1964, 15, p.49, A.L.Graham et al., Cat. Met., 1985, p.243. Further description of impact craters, J.Classen, Meteoritics, 1978, 13, p.245; see also, H.Korpikiewicz, Meteoritics, 1978, 13, p.311; J.Classen, Z. geol. Wiss., 1985, 13, p.703; H.Hurnik (ed.), Uniwersitet Im Adam Mickiewicza, Ser. Astronomia 2, Poznan, 1976. Classification and analysis, paired with Seeläsgen, 6.56% Ni, 98.9 ppm Ga, 496 ppm Ge, 1.0 ppm Ir, A.Kracher et al., GCA, 1980, 44, p.773. Metallographic description; some atmospheric reheating; may be a true crater-forming meteorite, V.F.Buchwald, Handbook of Iron Meteorites, Univ. of California, 1975, p.836. Mineralogy and chemical composition, B.Dominik, Prace Mineralogizne, 1976, 47, p.7. New analysis, reclassification from IAB to IIICD proposed, B.G.Choi et al., GCA, 1995, 59, p.593. Further description of crater field; two further masses of 70kg and 1kg have been found between 1990 and 1995, W.Czegka, Aufschluss, 1996, 47, p.165. Microdiffraction study using Kossel method, C.Hennig et al., MAPS, 1999, 34, p.61. Nitrogen isotopic composition by stepwise pyrolysis, K.V.Ponganis et al., LPSC, 2000, 31, abs. #1412. New classification: a main group member of the IAB complex, J.T.Wasson and G.W.Kallemeyn, GCA, 2002, 66, p.2445. Meteorite data copied from MetBase 7.0 for Windows. Author: Joern Koblitz, The MetBase Library of Meteoritics and Planetary Sciences, Benquestrasse 27, D-28209 Bremen, Germany Phone: +49 421 24 100 24 Fax: +49 421 24 100 99