Country: Mexico
State/District: Coahuila
Co-ordinates: 28°42'N, 102°44'W
Date of find: 1837, (known)
Total known weight: 2,100kg (approx.)
Number of pieces: 19
Remarks:
Classification:
Type: Hexahedrite
Shock Stage:
Weathering Stage:
Mineral Analyses:
Pairings: not known
Synonyms: Bolson de Mapimi, Bonanza Iron, Butcher Iron, Buther Iron, Cerralvo, Couch Iron, Fort Duncan, Fort Dunkan, Hacienda de Potosi, Lupton's Iron, Maverick County, Nuevo Leon, Potosi, Saltillo, Sancha Estate, Sanchez Estate, Santa Rosa, Santillo
Metbase description: Show/Hide
Fourteen masses (Bonanza Iron), some said to be of 2000lb to 3000lb, were seen by E.M.Hamilton in 1866, C.U.Shepard, Am. J. Sci., 1866, 42, p.347, C.U.Shepard, Am. J. Sci., 1867, 43, p.384. Eight pieces (Butcher Iron) from 290lb to 654lb in weight, totalling 4000lb were removed to the United States by H.B.Butcher in 1868, J.L.Smith, Am. J. Sci., 1869, 47, p.383. Another mass of Butcher Iron of 192lb was seen by N.T.Lupton in 1879 at Santa Rosa, Am. J. Sci., 1885, 29, p.232. The Sancha (Sanchez) Estate mass of 252lb was found in use as an anvil at Saltillo by D.N.Couch in 1853, J.L.Smith, Am. J. Sci., 1855, 19, p.160. A mass of 97lb was found at Fort Duncan, Maverick County Texas in 1882 by C.C.Cusick, W.E.Hidden, Am. J. Sci., 1886, 32, p.304. The probable identity of all these masses was suggested, A.Brezina, Ann. Naturhist. Hofmus. Wien, 1886, 1, p.26, L.Fletcher, Min. Mag., 1890, 9, p.107, M.H.Hey, Cat. Met., 1966, p.109. The Smithsonian Iron of about 6lb has been referred to Coahuila, E.Cohen, Meteoritenkunde, 1905, 3, p.190, but is distinct, as also is Richland, A.L.Graham et al., Cat. Met., 1985, p.105. Analysis, E.P.Henderson, Am. J. Sci., 1941, 239, p.407 (M.A.8-195). Trace element contents, E.Goldberg et al., GCA, 1951, 2, p.1. Further analysis, 5.49% Ni, 57.6 ppm Ga, 178 ppm Ge, 16 ppm Ir, J.T.Wasson, GCA, 1969, 33, p.859. K-Ar data, W.Kaiser and J.Zähringer, Meteorite Research, ed. P.M.Millman, D.Reidel, Dordrecht, Holland, 1969, p.429. Nitrogen abundance, E.K.Gibson and C.B.Moore, GCA, 1971, 35, p.877. Full description, shower part of a single kamacite crystal, V.F.Buchwald, Handbook of Iron Meteorites, Univ. of California, 1975, p.480. Cooling rate determination, E.Randich and J.I.Goldstein, GCA, 1978, 42, p.221. Ni and P concentration profiles of schreibersite and kamacite, R.S.Clarke,Jr. and J.I.Goldstein, Smithson. Contrib. Earth Sci., 1978, (21). Study of phosphide morphology, A.J.Easton and H.A.Buckley, Meteoritics,
1979, 14, p.143. Nitrogen abundances in acid resistant phases, S.V.S.Murty et al., GCA, 1983, 47, p.1061. Neutron diffraction pole figures, S.Höfler et al., Earth Planet. Sci. Lett., 1988, 90, p.1. Re-Os dating, J.W.Morgan et al., LPSC, 1991, 22, p.919 (abs.). Nitrogen isotopic composition, C.A.Prombo and R.N.Clayton, GCA, 1993, 57, p.3749; see also, LPSC, 1983, 14, p.620 (abs.). Re-Os dating, J.J.Shen et al., LPSC, 1995, 26, p.1283 (abs.); see also, GCA, 1996, 60, p.2887. Ag and Pd isotopic composition, J.H.Chen and G.J.Wasserburg, LPSC, 1996, 27, p.209 (abs.). Pt and Os contents and isotopic compositions, R.J.Walker et al., GCA, 1997, 61, p.4799. Re-Os isotopic composition, J.L.Birck and C.J.Allègre, MAPS, 1998, 33, p.647. Re-Os and Pt-Os isotopic systematics, D.A.Cook et al., LPSC, 2000, 31, abs. #1347. Ru isotopic composition, H.Becker and R.J.Walker, LPSC, 2002, 33, abs. #1018. LA-ICP-MS analysis of metal, M.I.Petaev and S.B.Jacobsen, LPSC, 2003, 34, abs. #1732; see also, MAPS, 2004, 39, p.1685. Ru isotopic composition, J.H.Chen et al., LPSC, 2003, 34, abs. #1789; see also, D.A.Papanastassiou et al., LPSC, 2004, 35, abs. #1828. Mo isotopic composition, J.H.Chen et al., LPSC, 2004, 35, abs. #1431.
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