Looks like a typical Ataxite but is chemically and structurally anomalous. Most irons with 7% Ni are octahedrites; this meteorite has a very fine grain texture.
Type: Ataxite
South Byron
A mass of nearly 6kg was found about 0.5 mile W of South Byron, M.H.Hey, Cat. Met., 1966, p.459. Nitrogen abundance, E.K.Gibson and C.B.Moore, GCA, 1971, 35, p.877. Chemically anomalous, but similar to Babb’s Mill (Troost’s Iron), analysis, 17.8% Ni, 20.0 ppm Ga, 45.0 ppm Ge, 28 ppm Ir, E.R.D.Scott et al., GCA, 1973, 37, p.1957. Metallographic description, V.F.Buchwald, Handbook of Iron Meteorites, Univ. of California, 1975, p.1158.
Tinnie
Found on a hillside by an Afphani graduate student studying Barbary sheep near Tinnie, New Mexico, it is a Ni-rich(18% Ni) plessitic ataxite. It has numerous vugs up to 1 cm.
Tucson
Two large masses, one ring-shaped (the Signet or Irwin-Ainsa Iron) of 688kg and the other (the Carleton Iron) of 287kg known for centuries, had been transported to Tucson from the Puerta de los Muchacos, a pass 20-30 miles S of that town and were used as anvils; first mentioned by J.F.Velasco in 1850, M.H.Hey, Cat. Met., 1966, p.491. Bibliography, with analyses, L.Fletcher, Min. Mag., 1890, 9, p.16. Bibliography for the period 1850-1876, P.J.McGough, Pop. Astron., Northfield, Minnesota, 1943, 51, p.511, 564, and 1944, 52, p.243. Detailed history, with bibliography, R.R.Willey, The Tucson Meteorites, Washington D.C., 1986, 56 pp. A unique iron with silicate inclusions, containing brezinaite, (Cr3S4), T.E.Bunch and L.H.Fuchs, Amer. Miner., 1969, 54, p.1509. Analysis, 9.45% Ni, 0.94 ppm Ga, 0.049 ppm Ge, 2.1 ppm Ir, orthopyroxene Fs0.4 in silicate inclusions, J.T.Wasson, GCA, 1970, 34, p.957. The Carleton mass has been heated and forged; different coordinates, weights of masses, V.F.Buchwald, Handbook of Iron Meteorites, Univ. of California, 1975, p.1235. Further chemical analysis, 9.82% Ni, 0.54% Co, M.I.Dyakonova and V.Y.Kharitonova, Meteoritika, 1975, 34, p.65. Microstructure and cooling rate calculation, the meteorite was rapidly cooled, G.T.Miyake and J.I.Goldstein, GCA, 1974, 38, p.1201. Further analysis, E.R.D.Scott, GCA, 1978, 42, p.1243. Relationship to enstatite meteorites; mineralogy and chemical composition of silicate inclusions, C.E.Nehru et al., J. Geophys. Res., 1982, 87, (suppl.), p.A365. Further analysis data of metallic and non-metallic phase, H.W.
Chinga
Many masses, individuals up to 20kg, were found in the Chinga stream, a tributary of the Upper Yenisei from the Tanno-ola Mts. The character of the Chinga iron individuals is somewhat flat, sharp shrapnel-like individuals. The location was revisited and additional specimens were found.